I am testing movit, and this seems to be a pretty serious bug. I can play back 4k video in the clip Monitor just fine. It's a bit slow, but bearable. Once I selected the area that I wanted to edit on, I dragged the clip to the timeline. The program segfaulted. Here is the backtrace: (gdb) start The program being debugged has been started already. Start it from the beginning? (y or n) y Function "main" not defined. Make breakpoint pending on future shared library load? (y or [n]) Starting program: /usr/bin/kdenlive [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". [New Thread 0x7fffdc81d700 (LWP 1402)] [New Thread 0x7fffd6a5f700 (LWP 1403)] [New Thread 0x7fffba0a1700 (LWP 1404)] [New Thread 0x7fffb39f1700 (LWP 1405)] [New Thread 0x7fffb28a7700 (LWP 1406)] [New Thread 0x7fffb1930700 (LWP 1407)] [New Thread 0x7fff9fde2700 (LWP 1408)] [Thread 0x7fff9fde2700 (LWP 1408) exited] [New Thread 0x7fff9fde2700 (LWP 1409)] [Thread 0x7fff9fde2700 (LWP 1409) exited] [New Thread 0x7fff9fde2700 (LWP 1410)] [New Thread 0x7fff9e2ad700 (LWP 1411)] [New Thread 0x7fff9d22c700 (LWP 1412)] [New Thread 0x7fff9c819700 (LWP 1413)] [New Thread 0x7fff8fdf0700 (LWP 1415)] [New Thread 0x7fff8f5ef700 (LWP 1416)] [New Thread 0x7fff8edee700 (LWP 1417)] [New Thread 0x7fff8e37b700 (LWP 1418)] [New Thread 0x7fff8db7a700 (LWP 1419)] OpenGL vendor: "NVIDIA Corporation" OpenGL renderer: "GeForce GTX 960/PCIe/SSE2" OpenGL ARG_SYNC: true OpenGL OpenGLES: false [New Thread 0x7fff8d1e9700 (LWP 1420)] [New Thread 0x7fff8c99d700 (LWP 1421)] OpenGL vendor: "NVIDIA Corporation" OpenGL renderer: "GeForce GTX 960/PCIe/SSE2" OpenGL ARG_SYNC: true OpenGL OpenGLES: false [New Thread 0x7fff67eff700 (LWP 1422)] [Thread 0x7fff9fde2700 (LWP 1410) exited] Removing cache at "/home/evert/.cache/kdenlive-thumbs.kcache" // / processing file open // / processing file open: validate Opening a document with version 0.94 / 0.94 // / processing file validate ok [Thread 0x7fff8edee700 (LWP 1417) exited] [Thread 0x7fff8f5ef700 (LWP 1416) exited] [Thread 0x7fff8fdf0700 (LWP 1415) exited] [Thread 0x7fff9c819700 (LWP 1413) exited] [Thread 0x7fff9e2ad700 (LWP 1411) exited] [Thread 0x7fff9d22c700 (LWP 1412) exited] [New Thread 0x7fff9d22c700 (LWP 1423)] [Thread 0x7fff9d22c700 (LWP 1423) exited] [New Thread 0x7fff9d22c700 (LWP 1424)] *********** FOUND GUIDES: 0 ********** [New Thread 0x7fff9e2ad700 (LWP 1425)] [New Thread 0x7fff9c819700 (LWP 1426)] [New Thread 0x7fff8edee700 (LWP 1427)] [New Thread 0x7fff97408700 (LWP 1428)] [New Thread 0x7fff96c07700 (LWP 1429)] [New Thread 0x7fff96406700 (LWP 1430)] [New Thread 0x7fff95c05700 (LWP 1431)] [New Thread 0x7fff95404700 (LWP 1432)] [New Thread 0x7fff94c03700 (LWP 1433)] [New Thread 0x7fff94402700 (LWP 1434)] [New Thread 0x7fff8fdf0700 (LWP 1435)] [Thread 0x7fff9d22c700 (LWP 1424) exited] [Thread 0x7fff8fdf0700 (LWP 1435) exited] [New Thread 0x7fff8fdf0700 (LWP 1437)] [Thread 0x7fff9e2ad700 (LWP 1425) exited] [Thread 0x7fff8fdf0700 (LWP 1437) exited] [New Thread 0x7fff8fdf0700 (LWP 1438)] [New Thread 0x7fff9e2ad700 (LWP 1439)] [New Thread 0x7fff9d22c700 (LWP 1440)] [Thread 0x7fff8fdf0700 (LWP 1438) exited] [Thread 0x7fff9d22c700 (LWP 1440) exited] [New Thread 0x7fff9d22c700 (LWP 1441)] [Thread 0x7fff9e2ad700 (LWP 1439) exited] [Thread 0x7fff9d22c700 (LWP 1441) exited] [New Thread 0x7fff9d22c700 (LWP 1442)] [New Thread 0x7fff9e2ad700 (LWP 1443)] [New Thread 0x7fff8fdf0700 (LWP 1444)] [New Thread 0x7fff6490e700 (LWP 1445)] [New Thread 0x7fff39ffc700 (LWP 1446)] [New Thread 0x7fff397fb700 (LWP 1447)] [New Thread 0x7fff38ffa700 (LWP 1448)] [New Thread 0x7fff33fff700 (LWP 1449)] [New Thread 0x7fff337fe700 (LWP 1450)] [New Thread 0x7fff32ffd700 (LWP 1451)] [New Thread 0x7fff327fc700 (LWP 1452)] [New Thread 0x7fff31ffb700 (LWP 1453)] QXcbConnection: XCB error: 8 (BadMatch), sequence: 27632, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 27653, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 27757, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32224, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32249, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32316, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32317, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32366, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32367, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32416, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32417, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32466, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32467, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32516, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32517, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32566, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32567, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32617, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32618, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32667, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32668, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32717, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32718, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32767, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32768, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32817, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32818, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32867, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32868, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32917, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32918, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32968, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 32969, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33018, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33019, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33068, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33069, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33118, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33119, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33160, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33180, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 33539, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 34065, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 34246, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 34751, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 35246, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 35732, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 36215, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 36706, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 37201, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 37698, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 38196, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 38686, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 39176, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 39668, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 40155, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 40648, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 41149, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 41642, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42133, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42631, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 43123, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 43606, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 44106, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 44596, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 45083, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 45579, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 46062, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 46559, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 47052, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 47547, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 48040, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 48533, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 49023, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 49515, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 50016, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 50509, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 51014, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 51511, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 52004, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 52509, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 53001, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 53493, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 53985, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 54477, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 54969, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 55469, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56455, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56475, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56535, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56584, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56633, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56682, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56731, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 56780, resource id: 10488876, major code: 130 (Unknown), minor code: 3 [New Thread 0x7fff317fa700 (LWP 1456)] [Thread 0x7fff8db7a700 (LWP 1419) exited] QXcbConnection: XCB error: 8 (BadMatch), sequence: 42098, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42118, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42146, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42156, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42166, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42208, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42223, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42948, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42969, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 42997, resource id: 10488876, major code: 130 (Unknown), minor code: 3 QXcbConnection: XCB error: 8 (BadMatch), sequence: 43007, resource id: 10488876, major code: 130 (Unknown), minor code: 3 [New Thread 0x7fff8db7a700 (LWP 1457)] [New Thread 0x7fff30ff9700 (LWP 1458)] [New Thread 0x7ffe8fffd700 (LWP 1459)] [New Thread 0x7ffe8f7fc700 (LWP 1460)] [New Thread 0x7ffe8effb700 (LWP 1461)] [New Thread 0x7ffe8e7fa700 (LWP 1462)] [New Thread 0x7ffe8dff9700 (LWP 1463)] [New Thread 0x7ffe8d7f8700 (LWP 1464)] [New Thread 0x7ffe8cff7700 (LWP 1465)] / / /ADDING CLIP: 127 [Thread 0x7fff317fa700 (LWP 1456) exited] [Thread 0x7fff9d22c700 (LWP 1442) exited] [Thread 0x7fff31ffb700 (LWP 1453) exited] [New Thread 0x7fff31ffb700 (LWP 1466)] [Thread 0x7fff9e2ad700 (LWP 1443) exited] [New Thread 0x7fff9e2ad700 (LWP 1467)] [Thread 0x7fff9e2ad700 (LWP 1467) exited] [New Thread 0x7fff9e2ad700 (LWP 1468)] [New Thread 0x7fff9d22c700 (LWP 1469)] GL error 0x501 at filter_glsl_manager.cpp:381 Thread 65 "RenderThread" received signal SIGABRT, Aborted. [Switching to Thread 0x7fff9d22c700 (LWP 1469)] 0x00007fffef8a72a8 in raise () from /usr/lib/libc.so.6 (gdb) thread apply all bt Thread 65 (Thread 0x7fff9d22c700 (LWP 1469)): #0 0x00007fffef8a72a8 in raise () from /usr/lib/libc.so.6 #1 0x00007fffef8a872a in abort () from /usr/lib/libc.so.6 #2 0x00007fffd4892ac3 in GlslManager::render_frame_texture(movit::EffectChain*, mlt_frame_s*, int, int, unsigned char**) () from /usr/lib/mlt/libmltopengl.so #3 0x00007fffd4895a02 in ?? () from /usr/lib/mlt/libmltopengl.so #4 0x00007ffff6d8a058 in mlt_frame_get_image () from /usr/lib/libmlt.so.6 #5 0x00007ffff6d9ff29 in ?? () from /usr/lib/libmlt.so.6 #6 0x00007ffff6d8a007 in mlt_frame_get_image () from /usr/lib/libmlt.so.6 #7 0x00007ffff6d9d6d4 in ?? () from /usr/lib/libmlt.so.6 #8 0x00000000007013dd in ?? () #9 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #10 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #11 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 64 (Thread 0x7fff9e2ad700 (LWP 1468)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007ffff6d9d95b in mlt_consumer_rt_frame () from /usr/lib/libmlt.so.6 #2 0x00007fffb969aa20 in ?? () from /usr/lib/mlt/libmltsdl.so #3 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #4 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 62 (Thread 0x7fff31ffb700 (LWP 1466)): #0 0x00007fffee10a3e8 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007ffff0347bc6 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5 #2 0x00007ffff03432dc in ?? () from /usr/lib/libQt5Core.so.5 #3 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #4 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #5 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 61 (Thread 0x7ffe8cff7700 (LWP 1465)): #0 0x00007fffc172e657 in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc173094d in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 60 (Thread 0x7ffe8d7f8700 (LWP 1464)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab160b in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1710d6e in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1717a6b in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc173059b in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #7 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #8 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 59 (Thread 0x7ffe8dff9700 (LWP 1463)): #0 0x00007fffc16e3e94 in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16e84f5 in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1730589 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #7 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 58 (Thread 0x7ffe8e7fa700 (LWP 1462)): #0 0x00007fffc16e614a in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16ecb3d in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1730589 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 ---Type <return> to continue, or q <return> to quit--- #4 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #7 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 57 (Thread 0x7ffe8effb700 (LWP 1461)): #0 0x00007fffc16e663e in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16ecbda in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1730589 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #7 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 56 (Thread 0x7ffe8f7fc700 (LWP 1460)): #0 0x00007fffc16e53e5 in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16e61aa in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc16ecb8d in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1730589 in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #7 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 55 (Thread 0x7ffe8fffd700 (LWP 1459)): #0 0x00007fffc16e65aa in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16ecb3d in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1730589 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #7 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 54 (Thread 0x7fff30ff9700 (LWP 1458)): #0 0x00007fffc16e4154 in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16e84f5 in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1730589 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #7 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 53 (Thread 0x7fff8db7a700 (LWP 1457)): #0 0x00007fffc1db671d in ?? () from /usr/lib/libavcodec.so.57 #1 0x00007fffc16ff9be in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc172ef07 in ?? () from /usr/lib/libavcodec.so.57 #3 0x00007fffc173094d in ?? () from /usr/lib/libavcodec.so.57 #4 0x00007fffc1734fa5 in ?? () from /usr/lib/libavcodec.so.57 #5 0x00007fffc16e1161 in ?? () from /usr/lib/libavcodec.so.57 #6 0x00007fffc1ab17b5 in ?? () from /usr/lib/libavcodec.so.57 #7 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 50 (Thread 0x7fff327fc700 (LWP 1452)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 49 (Thread 0x7fff32ffd700 (LWP 1451)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 ---Type <return> to continue, or q <return> to quit--- #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 48 (Thread 0x7fff337fe700 (LWP 1450)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 47 (Thread 0x7fff33fff700 (LWP 1449)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 46 (Thread 0x7fff38ffa700 (LWP 1448)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 45 (Thread 0x7fff397fb700 (LWP 1447)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 44 (Thread 0x7fff39ffc700 (LWP 1446)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 43 (Thread 0x7fff6490e700 (LWP 1445)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 42 (Thread 0x7fff8fdf0700 (LWP 1444)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 33 (Thread 0x7fff94402700 (LWP 1434)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 32 (Thread 0x7fff94c03700 (LWP 1433)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 31 (Thread 0x7fff95404700 (LWP 1432)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 30 (Thread 0x7fff95c05700 (LWP 1431)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 ---Type <return> to continue, or q <return> to quit--- #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 29 (Thread 0x7fff96406700 (LWP 1430)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 28 (Thread 0x7fff96c07700 (LWP 1429)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 27 (Thread 0x7fff97408700 (LWP 1428)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 26 (Thread 0x7fff8edee700 (LWP 1427)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 25 (Thread 0x7fff9c819700 (LWP 1426)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab183e in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 21 (Thread 0x7fff67eff700 (LWP 1422)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe94f1f7c in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fffe94f208c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff056fcab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007ffff05186fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007ffff0341fe4 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #7 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 20 (Thread 0x7fff8c99d700 (LWP 1421)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007ffff0347c8b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5 #2 0x00007ffff603eb8d in ?? () from /usr/lib/libQt5Quick.so.5 #3 0x00007ffff603f465 in ?? () from /usr/lib/libQt5Quick.so.5 #4 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #5 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 19 (Thread 0x7fff8d1e9700 (LWP 1420)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe94f1f7c in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fffe94f208c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff056fc8f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007ffff05186fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007ffff0341fe4 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #7 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #8 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 17 (Thread 0x7fff8e37b700 (LWP 1418)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 ---Type <return> to continue, or q <return> to quit--- #1 0x00007ffff0347c8b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5 #2 0x00007ffff603eb8d in ?? () from /usr/lib/libQt5Quick.so.5 #3 0x00007ffff603f465 in ?? () from /usr/lib/libQt5Quick.so.5 #4 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #5 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 7 (Thread 0x7fffb1930700 (LWP 1407)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe94f1f7c in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fffe94f208c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff056fc8f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007ffff05186fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007ffff0341fe4 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007ffff1f96915 in ?? () from /usr/lib/libQt5Qml.so.5 #7 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #8 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 6 (Thread 0x7fffb28a7700 (LWP 1406)): #0 0x00007fffee10a03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #1 0x00007fffc1ab11db in ?? () from /usr/lib/libavcodec.so.57 #2 0x00007fffc1bc3a8d in avcodec_decode_video2 () from /usr/lib/libavcodec.so.57 #3 0x00007fffb80f9cb8 in ?? () from /usr/lib/mlt/libmltavformat.so #4 0x00007ffff6d8a007 in mlt_frame_get_image () from /usr/lib/libmlt.so.6 #5 0x00007fffcaa6585c in ?? () from /usr/lib/mlt/libmltcore.so #6 0x00007ffff6d8a007 in mlt_frame_get_image () from /usr/lib/libmlt.so.6 #7 0x00007ffff6b6fa2d in Mlt::Frame::get_image(mlt_image_format&, int&, int&, int) () from /usr/lib/libmlt++.so.3 #8 0x00000000007f8ce9 in ?? () #9 0x00000000007dba88 in ?? () #10 0x00000000004c743d in ?? () #11 0x00007ffff03430d3 in ?? () from /usr/lib/libQt5Core.so.5 #12 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #13 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #14 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 5 (Thread 0x7fffb39f1700 (LWP 1405)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe94f1f7c in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fffe94f208c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff056fc8f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007ffff05186fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007ffff0341fe4 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007ffff1f96915 in ?? () from /usr/lib/libQt5Qml.so.5 #7 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #8 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 4 (Thread 0x7fffba0a1700 (LWP 1404)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffbf791cbc in ?? () from /usr/lib/libusb-1.0.so.0 #2 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #3 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 3 (Thread 0x7fffd6a5f700 (LWP 1403)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe94f1f7c in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fffe94f208c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff056fcab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007ffff05186fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007ffff0341fe4 in QThread::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00007ffff2a24a55 in ?? () from /usr/lib/libQt5DBus.so.5 #7 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #8 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #9 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 ---Type <return> to continue, or q <return> to quit--- Thread 2 (Thread 0x7fffdc81d700 (LWP 1402)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe73c3ae2 in ?? () from /usr/lib/libxcb.so.1 #2 0x00007fffe73c5757 in xcb_wait_for_event () from /usr/lib/libxcb.so.1 #3 0x00007fffded87a99 in ?? () from /usr/lib/libQt5XcbQpa.so.5 #4 0x00007ffff0346de8 in ?? () from /usr/lib/libQt5Core.so.5 #5 0x00007fffee104424 in start_thread () from /usr/lib/libpthread.so.0 #6 0x00007fffef95bcbd in clone () from /usr/lib/libc.so.6 Thread 1 (Thread 0x7ffff7ec9800 (LWP 1401)): #0 0x00007fffef952c3d in poll () from /usr/lib/libc.so.6 #1 0x00007fffe94f1f7c in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007fffe94f208c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff056fc8f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #4 0x00007ffff05186fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5 #5 0x00007ffff0520b7c in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5 #6 0x00000000004861ba in ?? () #7 0x00007fffef894710 in __libc_start_main () from /usr/lib/libc.so.6 #8 0x0000000000486839 in _start () (gdb) Reproducible: Always movit and mlt are latest released packages, kdenlive is built from git. Using official released nVidia drivers.
Thanks for the report. Does this happen when movit is disabled? (restart required) Can you test movit-git from AUR?
It does not happen with movit disabled. I have not tried with movit from git, will do so later today. I was under the impression that movit was not seeing too many updates.... Thanks for the pointer.... -Evert-
Created attachment 98138 [details] Crash when selecting the project bin I re-compiled mlt, kdenlive and movit, enabling debugging symbols. I can reliably crash kdenlive just by clicking on a track in an empty project, whereby activating the project monitor. Attached is a backtrace of the failure.
This seems to be related to Bug 355259, as kdenlive throws exactly the same error, but for some reason the bug was marked as invalid. Just checked today (2016-04-07) and it still fails with the same error.
This may be related to bug 361086. I just checked, and it still segfaults in the same way.
Still an issue as of 2016-08-09.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
Status changed to reported. Movit still segfaults kdenlive as of 2018-09-27
Created attachment 124254 [details] Console Output 2019-12-02 The console output, for people who might be interested
Created attachment 124255 [details] GDB Backtrace The backtrace of the GNU debugger, for people who are interested
I can still segfault kdenlive at will by enabling the movit library, and then dragging a clip to the timeline and clicking back and forth between clip monitor and project monitor. Date 2019-12-02
MOVIT is still not working properly. MLT will get focus on gpu acceleration in 2020.
This is not a segfault, it's an assert() failing (SIGABRT). And it is in MLT, not in movit. Most probably GlslManager::render_frame_rgba() in MLT is passed an invalid frame size, it doesn't check the size it seems. But it's a large function, and it has asserts for everything, so it's a bit hard to say without symbols. MLT shouldn't assert everywhere, though, this makes GPU stuff (including movit) seem much more crashy than it is.
Hi there. What can I do to help? Build with tracebacks and give a more detailed crash log?
I'm fairly certain that it's a bug in MLT, and it has several reported issues with RGBA sources already. And I think they plan on getting all of them fixed with the next major release. So it could be marked as upstream at https://github.com/mltframework/mlt, but as there are multiple similar issues there already and it might not be an MLT issue after all, I guess this bug can stay open to track it here, and then when the issues in MLT are fixed it can be verified as fixing this bug.
(In reply to Martin Sandsmark from comment #15) > I'm fairly certain that it's a bug in MLT, and it has several reported > issues with RGBA sources already. And I think they plan on getting all of > them fixed with the next major release. > > So it could be marked as upstream at https://github.com/mltframework/mlt, > but as there are multiple similar issues there already and it might not be > an MLT issue after all, I guess this bug can stay open to track it here, and > then when the issues in MLT are fixed it can be verified as fixing this bug. Has this been fixed in MLT in the meanwhile (at least in master) or do you mean this will be fixed in MLT 7?
Hi Evert, can you please test if this is still relevant?
If anything, kdenlive is even more unstable now if movit is enabled. It crashes as soon as a proxy of a clip is loaded. My hardware has changed since the last test. Previously I was running nVidia proprietary drivers and intel CPU. Right now I am running on AMD with fully open source graphic drivers. In no small part was the decision to go fully open source stack influenced by the ability to troubleshoot things like this. Current driver: Extended renderer info (GLX_MESA_query_renderer): Vendor: AMD (0x1002) Device: AMD RENOIR (LLVM 13.0.1, DRM 3.46, 5.18.5-AMD-znver2) (0x1636) Version: 22.1.2 Accelerated: yes Video memory: 2048MB Unified memory: no Preferred profile: core (0x1) Max core profile version: 4.6 Max compat profile version: 4.6 Max GLES1 profile version: 1.1 Max GLES[23] profile version: 3.2 Kdenlive version 22.07.70, built from recent git master KDE Frameworks Version 5.95.0 KDE Frameworks Version 5.95.0 MLT Version 7.7.0 Open source multimedia framework. (Also built from the latest git master) If there is any testing I can do to track down this error, I would be more than happy to help.
Created attachment 150053 [details] gdb backtrace of the crash, 2022-06-22 What the backtrace looks like now.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
I added a backtrace. What more info is needed?
I also have very frequent crashes when using movit on an AMD GPU (5700xt). I am assuming my issues are related to this bug report; doing anything at all with GPU acceleration enabled causes a crash. This is my terminal output: Could not detect package type, probably default? App dir is "/usr/bin" === /// CANNOT ACCESS SPEECH DICTIONARIES FOLDER mlt_repository_init: failed to dlopen /usr/lib/mlt-7/libmltsox.so (libsox.so.3: cannot open shared object file: No such file or directory) profilePath from KdenliveSetting::mltPath: "/usr/share/mlt-7/profiles" meltPath from KdenliveSetting::rendererPath: "/usr/bin/melt-7" Empty metadata for "telecide" Empty metadata for "audiochannels" Empty metadata for "audioconvert" Empty metadata for "imageconvert" Empty metadata for "avcolour_space" Empty metadata for "avcolor_space" Empty metadata for "avdeinterlace" Empty metadata for "swscale" Empty metadata for "swresample" Empty metadata for "deinterlace" Empty metadata for "glsl.manager" Empty metadata for "movit.convert" Empty metadata for "movit.crop" Empty metadata for "movit.resample" Empty metadata for "movit.resize" plugin not available: "avfilter.acompressor" plugin not available: "avfilter.aecho" plugin not available: "avfilter.agate" plugin not available: "avfilter.atadenoise" plugin not available: "avfilter.bwdif" plugin not available: "avfilter.deblock" plugin not available: "avfilter.dedot" plugin not available: "avfilter.deflate" plugin not available: "avfilter.derain" plugin not available: "avfilter.doubleweave" plugin not available: "avfilter.field" plugin not available: "avfilter.framestep" plugin not available: "avfilter.fspp" plugin not available: "avfilter.graphmonitor" plugin not available: "avfilter.hqdn3d" plugin not available: "avfilter.inflate" plugin not available: "avfilter.lagfun" plugin not available: "avfilter.loudnorm" plugin not available: "avfilter.mcdeint" plugin not available: "avfilter.random" plugin not available: "avfilter.removegrain" plugin not available: "avfilter.separatefields" plugin not available: "avfilter.shuffleplanes" plugin not available: "avfilter.sofalizer" plugin not available: "avfilter.sr" plugin not available: "avfilter.tmix" plugin not available: "avfilter.w3fdif" plugin not available: "avfilter.weave" plugin not available: "avfilter.yadif" plugin not available: "frei0r.baltan" plugin not available: "frei0r.bgsubtract0r" plugin not available: "frei0r.delay0r" plugin not available: "frei0r.delaygrab" plugin not available: "frei0r.lightgraffiti" plugin not available: "frei0r.lightgraffiti" plugin not available: "frei0r.tehRoxx0r" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "ladspa" plugin not available: "movit.unsharp_mask" plugin not available: "region" plugin not available: "sox" plugin not available: "sox" plugin not available: "sox" plugin not available: "sox" plugin not available: "sox" plugin not available: "sox" plugin not available: "sox" plugin not available: "timewarp" plugin not available: "region" QQmlEngine::setContextForObject(): Object already has a QQmlContext QWidget::setMinimumSize: (effect_list/QDockWidget) Negative sizes (0,-1) are not possible QWidget::setMinimumSize: (transition_list/QDockWidget) Negative sizes (0,-1) are not possible QWidget::setMinimumSize: (effect_list/QDockWidget) Negative sizes (0,-1) are not possible QWidget::setMinimumSize: (transition_list/QDockWidget) Negative sizes (0,-1) are not possible QQmlEngine::setContextForObject(): Object already has a QQmlContext MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" qrc:/qml/timeline.qml:1643: TypeError: Cannot read property 'isSubtitleTrack' of null qrc:/qml/timeline.qml:977: TypeError: Cannot read property 'isSubtitleTrack' of null MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" MLT: "[filter avcolor_space] Invalid format opengl_texture" LOCALE: Document uses "." as decimal point and "C" as locale Searching for locale: Found QLocale(English, Latin, United States) with match type 0 Model size of -3 is less than 0 ===== READY FOR THUMB ClipType::AV ========= ===== READY FOR THUMB ClipType::AV ========= ===== SEEKING THUMB PROD ========= ===== SEEKING THUMB PROD ========= ::: REGISTERING CLIP TO BIN::::: :::::::::::::::::::::: REGISTRATION 8 ptr count 3 qml: loaded clip: 0 , ID: 8 , index: 0 , TYPE: AV qml: loaded clip with Astream: 0 ::: REGISTERING CLIP TO BIN::::: :::::::::::::::::::::: REGISTRATION 10 ptr count 3 qml: loaded clip: 0 , ID: 10 , index: 0 , TYPE: AV qml: loaded clip with Astream: 0 qml: loaded clip: 0 , ID: 10 , index: 1 , TYPE: AV qml: loaded clip with Astream: 0 qml: loaded clip: 0 , ID: 8 , index: 2 , TYPE: AV qml: loaded clip with Astream: 0 QQmlContext: Cannot set context object on invalid context. QQmlComponent: Cannot create a component in an invalid context QQmlContext: Cannot set context object on invalid context. QQmlComponent: Cannot create a component in an invalid context === GOT THUMB FOR: -1 x -1 === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === GOT THUMB FOR: -1 x -1 ======= SETTING AUDIO DATA IN MON MUTEX LOCK!!!!!!!!!!!! setmodel MUTEX UNLOCK!!!!!!!!!!!! setmodel MUTEX LOCK!!!!!!!!!!!! loadEffects COUNT: 0 TRACK NOT IN TARGET : 7 = (7) === AUDIO NOT FOUND TRACK NOT IN TARGET : 7 = (7) ----- // SHOW KEYFRAMES: true MUTEX LOCK!!!!!!!!!!!! setmodel MUTEX UNLOCK!!!!!!!!!!!! setmodel MUTEX LOCK!!!!!!!!!!!! loadEffects COUNT: 0 === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND === AUDIO NOT FOUND pos: 317 out-offset: 455911 TRACK NOT IN TARGET : 7 = () GL error 0x501 (GL_INVALID_VALUE) at effect_chain.cpp:1993 zsh: IOT instruction (core dumped) kdenlive
Hi! Please note that MOVIT has been experimental so far and was not well maintained. Due to lots of issue we recently disabled it. See https://invent.kde.org/multimedia/kdenlive/-/commit/41b74bd282e8a96be3b75f423f8101fa506d858d In the long run there are plans to add a GPU again either with enhanced MOVIT or a new system, there is no eta yet. Thanks again for your report!