SUMMARY motion tracking doesn't work on Arch 90% of time. occasionally some algoritm works but trying again fails. STEPS TO REPRODUCE 1. download this example on Arch: https://www.dropbox.com/sh/799sn40ufdhwqvp/AAA-_q1x7MQ2Y3O3OfccqU6ra?dl=1 2. try to generate motion tracking OBSERVED RESULT motion tracking fails with this error: Current Frame: 1, percentage: 0 animation initialized FAILED Current Frame: 5, percentage: 2 Current Frame: 11, percentage: 4 Current Frame: 18, percentage: 7 Current Frame: 24, percentage: 10 Current Frame: 30, percentage: 13 Current Frame: 36, percentage: 15 Current Frame: 43, percentage: 18 Current Frame: 49, percentage: 21 Current Frame: 55, percentage: 24 Current Frame: 61, percentage: 26 Current Frame: 68, percentage: 29 Current Frame: 75, percentage: 33 Current Frame: 81, percentage: 35 Current Frame: 87, percentage: 38 Current Frame: 94, percentage: 41 Current Frame: 101, percentage: 44 Current Frame: 108, percentage: 47 Current Frame: 115, percentage: 50 Current Frame: 121, percentage: 53 Current Frame: 127, percentage: 55 Current Frame: 134, percentage: 59 Current Frame: 140, percentage: 61 Current Frame: 147, percentage: 64 Current Frame: 154, percentage: 67 Current Frame: 160, percentage: 70 Current Frame: 167, percentage: 73 Current Frame: 173, percentage: 76 Current Frame: 180, percentage: 79 Current Frame: 186, percentage: 81 Current Frame: 193, percentage: 85 Current Frame: 199, percentage: 87 Current Frame: 206, percentage: 90 Current Frame: 212, percentage: 93 Current Frame: 218, percentage: 96 Current Frame: 224, percentage: 98 EXPECTED RESULT it should work ADDITIONAL INFORMATION I am trying to help Arch linux to have a fully functioning kdenlive and have stumbled upon this curious bug. What I discovered: 1. motion tracking works perfectly with Appimage 2. motion tracking works perfectly if I install opencv from the cachyos repos. The only difference is that the package is compiled with optimisations: #CPPFLAGS="" CFLAGS="-march=x86-64-v3 -O3 -pipe -fno-plt -fexceptions \ -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security \ -fstack-clash-protection -fcf-protection" CXXFLAGS="$CFLAGS -Wp,-D_GLIBCXX_ASSERTIONS" LDFLAGS="-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now" It seems that the problem is therefore in opencv. Is the one in the appimage compiled with special flags? What advice can I give the Arch Linux developers to make motion tracking work? I report the open bug on archlinux: https://bugs.archlinux.org/task/74957?project=1&string=kdenlive Thank you very much.
after some experiment I found that opencv compiled with -O3 works fine, but version 4.7 has problem with deSiam: Current Frame: 1, percentage: 1 /usr/include/c++/12.2.0/bits/stl_vector.h:1123: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = float; _Alloc = std::allocator<float>; reference = float&; size_type = long unsigned int]: Assertion '__n < this->size()' failed. /usr/include/c++/12.2.0/bits/stl_vector.h:1123: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = float; _Alloc = std::allocator<float>; reference = float&; size_type = long unsigned int]: Assertion '__n < this->size()' failed.
It's an Arch-specific bug. In other distros it works. For Arch (and derivatives) you can install opencv from KaOS, it works fine.