Created attachment 183749 [details] Broken audio as downloaded from YouTube SUMMARY The following video (produced for a news channel in MPEG**) fails to play correctly once uploaded to YouTube. The problem only affects the audio in the beginning, where spoken words are entirely missing or get distorted. This might also be YouTube's fault and not Kdenlive's. It happens when I export the file as MP4. ** The resulting faulty audio I downloaded from YouTube is attached here. I cannot attach the MPEG here because of the size, but I can send it to you by link or e-mail if you would like to try. STEPS TO REPRODUCE 1. Use Kdenlive to convert the attached original MPEG file to MP4 in order to upload that to YouTube 2. Upload the resulting MP4 file to YouTube 3. OBSERVED RESULT Spoken words in the beginning of the audio are missing or distorted if you compare the original to the YouTube version I have provided. EXPECTED RESULT There should be no change to audio/video files rendered by Kdenlive when played back on YouTube. SOFTWARE/OS VERSIONS Windows: 11 Pro, v 24H2 macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: KDE Plasma Version: KDE Frameworks Version: 6.16.0 Qt Version: 6.8.3 ADDITIONAL INFORMATION
This is the MPEG file information according to MediaInfo: General Format : MPEG-PS File size : 12.9 MiB Duration : 3 s 600 ms Overall bit rate mode : Constant Overall bit rate : 30.0 Mb/s Frame rate : 25.000 FPS Video ID : 224 (0xE0) Format : MPEG Video Format version : Version 2 Format profile : Main@High Format settings : BVOP Format settings, BVOP : Yes Format settings, Matrix : Default Format settings, GOP : M=3, N=12 Format settings, picture structure : Frame Duration : 3 s 600 ms Bit rate mode : Constant Bit rate : 29.0 Mb/s Maximum bit rate : 30.0 Mb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate : 25.000 FPS Standard : PAL Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Interlaced Scan order : Top Field First Compression mode : Lossy Bits/(Pixel*Frame) : 0.559 Time code of first frame : 00:24:59:08 Time code source : Group of pictures header GOP, Open/Closed : Open GOP, Open/Closed of first frame : Closed Stream size : 12.4 MiB (97%) Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Audio ID : 192 (0xC0) Format : MPEG Audio Format version : Version 1 Format profile : Layer 2 Duration : 3 s 504 ms Bit rate mode : Constant Bit rate : 384 kb/s Channel(s) : 2 channels Sampling rate : 48.0 kHz Frame rate : 41.667 FPS (1152 SPF) Compression mode : Lossy Stream size : 164 KiB (1%)
This is the MP4 file information, as rendered by Kdenlive, according to MediaInfo: General Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 1.60 MiB Duration : 3 s 520 ms Overall bit rate mode : Variable Overall bit rate : 3 818 kb/s Frame rate : 25.000 FPS Writing application : Lavf61.7.100 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 4 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 3 s 520 ms Bit rate : 3 715 kb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 25.000 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : MBAFF Scan type, store method : Interleaved fields Scan order : Top Field First Bits/(Pixel*Frame) : 0.072 Stream size : 1.56 MiB (97%) Writing library : x264 core 164 r3106M eaa68fa Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=2 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=12 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=tff / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=0 / keyint=15 / keyint_min=1 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00 Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Codec configuration box : avcC Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 3 s 520 ms Source duration : 3 s 541 ms Bit rate mode : Variable Bit rate : 93.0 kb/s Maximum bit rate : 160 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Stream size : 40.2 KiB (2%) Source stream size : 40.2 KiB (2%) Default : Yes Alternate group : 1
Created attachment 183751 [details] MP4 file as produced by Kdenlive (fine by itself, but problematic if uploaded on YT)