[FFmpeg-trac] #9571(undetermined:new): MXF muxer using long gop with x264 essence creates corrupt output

[FFmpeg]

#9571: MXF muxer using long gop with x264 essence creates corrupt output
-------------------------------------+-------------------------------------
             Reporter:  steipal      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 The file is not playable in Premiere, Vegas, VirtualDub or VLC.
 It seems to be an issue that x264 with reordered frames is not indexed
 correctly in MXF.

 How to reproduce:
 {{{
 >ffmpeg -f lavfi -i mandelbrot -t 10 -c:v libx264 -pix_fmt yuv420p
 output.mxf

 ffmpeg version N-104973-g26dcb05b97 Copyright (c) 2000-2021 the FFmpeg
 developers
   built with gcc 11.2.0 (Rev5, Built by MSYS2 project)
   configuration:  --disable-static --enable-shared --pkg-config=pkgconf
 --cc='ccache gcc' --cxx='ccache g++' --ld='ccache g++' --disable-
 autodetect --enable-amf --enable-bzlib --enable-cuda --enable-cuvid
 --enable-d3d11va --enable-dxva2 --enable-iconv --enable-lzma --enable-
 nvenc --enable-zlib --enable-sdl2 --enable-ffnvcodec --enable-nvdec
 --enable-cuda-llvm --enable-libmp3lame --enable-libopus --enable-libvorbis
 --enable-libvpx --enable-libx264 --enable-libx265 --enable-libdav1d
 --enable-libaom --disable-debug --enable-fontconfig --enable-libass
 --enable-libbluray --enable-libfreetype --enable-libmfx --enable-libmysofa
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
 --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-
 libwebp --enable-libxml2 --enable-libzimg --enable-libshine --enable-gpl
 --enable-avisynth --enable-libxvid --enable-libopenmpt --enable-version3
 --enable-librav1e --enable-libsrt --enable-libgsm --enable-libvmaf
 --enable-libsvtav1 --enable-librubberband --enable-mbedtls --extra-
 cflags=-DLIBTWOLAME_STATIC --extra-libs=-lstdc++ --extra-
 cflags=-DLIBXML_STATIC --extra-libs=-liconv --disable-w32threads
 --shlibdir=/local64/bin-video
   libavutil      57. 12.100 / 57. 12.100
   libavcodec     59. 14.100 / 59. 14.100
   libavformat    59. 10.100 / 59. 10.100
   libavdevice    59.  0.101 / 59.  0.101
   libavfilter     8. 20.100 /  8. 20.100
   libswscale      6.  1.101 /  6.  1.101
   libswresample   4.  0.100 /  4.  0.100
   libpostproc    56.  0.100 / 56.  0.100
 Input #0, lavfi, from 'mandelbrot':
   Duration: N/A, start: 0.000000, bitrate: N/A
   Stream #0:0: Video: rawvideo (RGB[0] / 0x424752), rgb0, 640x480 [SAR 1:1
 DAR 4:3], 25 tbr, 25 tbn
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
 Press [q] to stop, [?] for help
 [libx264 @ 00000227b5e00d00] using SAR=1/1
 [libx264 @ 00000227b5e00d00] using cpu capabilities: MMX2 SSE2Fast SSSE3
 SSE4.2 AVX FMA3 BMI2 AVX2
 [libx264 @ 00000227b5e00d00] profile High, level 3.0, 4:2:0, 8-bit
 Output #0, mxf, to 'output.mxf':
   Metadata:
     encoder         : Lavf59.10.100
   Stream #0:0: Video: h264, yuv420p(tv, progressive), 640x480 [SAR 1:1 DAR
 4:3], q=2-31, 25 fps, 25 tbn
     Metadata:
       encoder         : Lavc59.14.100 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 frame=  250 fps=123 q=-1.0 Lsize=    2968kB time=00:00:09.92
 bitrate=2450.6kbits/s speed=4.88x
 video:2764kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 7.369122%
 [libx264 @ 00000227b5e00d00] frame I:1     Avg QP:20.70  size: 24904
 [libx264 @ 00000227b5e00d00] frame P:63    Avg QP:23.47  size: 17056
 [libx264 @ 00000227b5e00d00] frame B:186   Avg QP:29.95  size:  9305
 [libx264 @ 00000227b5e00d00] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%
 [libx264 @ 00000227b5e00d00] mb I  I16..4: 37.8% 45.2% 16.9%
 [libx264 @ 00000227b5e00d00] mb P  I16..4:  0.6%  0.1%  0.0%  P16..4:
 44.5% 14.5% 10.8%  0.0%  0.0%    skip:29.5%
 [libx264 @ 00000227b5e00d00] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:
 30.5%  5.8%  2.7%  direct: 4.5%  skip:56.5%  L0:45.4% L1:45.1% BI: 9.5%
 [libx264 @ 00000227b5e00d00] 8x8 transform intra:35.8% inter:16.5%
 [libx264 @ 00000227b5e00d00] coded y,uvDC,uvAC intra: 23.2% 68.6% 26.7%
 inter: 12.5% 24.4% 19.3%
 [libx264 @ 00000227b5e00d00] i16 v,h,dc,p:  9%  7%  2% 81%
 [libx264 @ 00000227b5e00d00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 10% 22%
 11% 13%  6% 12%  6%  4%
 [libx264 @ 00000227b5e00d00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 16% 12%
 10% 11%  9% 10%  9%  8%
 [libx264 @ 00000227b5e00d00] i8c dc,h,v,p: 27%  9% 12% 52%
 [libx264 @ 00000227b5e00d00] Weighted P-Frames: Y:0.0% UV:0.0%
 [libx264 @ 00000227b5e00d00] ref P L0: 56.2%  5.4% 26.8% 11.7%
 [libx264 @ 00000227b5e00d00] ref B L0: 71.6% 21.4%  6.9%
 [libx264 @ 00000227b5e00d00] ref B L1: 87.9% 12.1%
 [libx264 @ 00000227b5e00d00] kb/s:2264.17
 }}}

 It plays well in MPV and ffprobe.

 Changing muxer to MOV works as expected.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9571>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker