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  • How to fix : Frame rate differs from source after encoding certain mp4 videos to wmv

    25 juin 2019, par hpenhp

    I’m having trouble with a usually working ffmpeg script for encoding mp4 and more to wmv. The goal is to keep it like the original, except for the resolution (smaller) and the format (wmv).

    When it usually works for a lot of videos, on some of them it doesn’t... and i would like to understand and avoid that.

    I tried several things, forcing the framerate for the output, using -vsync 2 option, -vsync 0 also.. noone of that fixed the issue.

    An other thing, worth adding, is that the fps value from media info is good (24 fps) on the output like the input, but through the M$ windows explorer, it says 30 frames per sec, and when you play the video you see that the text that was matching the input doesn’t match the output any more (because of the fps mismatching).

    Below the script i use :

    ffmpeg -threads auto -i input.mp4 -s 480*320 -b:v 1000k -vcodec msmpeg4 -acodec wmav2 -f asf output.wmv

    Here is the ffmpeg log :

    ffmpeg version 3.4.1-1~16.04.york0 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.5) 20160609
    
  configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  WARNING: library configuration mismatch
    
  avcodec     configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './test_2k-24__hq_960x540.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42mp41isomavc1
    
    creation_time   : 2019-05-27T14:37:50.000000Z
    
  Duration: 01:28:52.80, start: 0.000000, bitrate: 1232 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 960x540, 1091 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default)
    
    Metadata:
    
      creation_time   : 2019-05-27T14:37:50.000000Z
    
      handler_name    : L-SMASH Video Handler
    
      encoder         : AVC Coding
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 137 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-05-27T14:37:50.000000Z
    
      handler_name    : L-SMASH Audio Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> msmpeg4v3 (msmpeg4))
    
  Stream #0:1 -> #0:1 (aac (native) -> wmav2 (native))
    
Press [q] to stop, [?] for help
    
Output #0, asf, to '/nas/copiedetravail/test_2k-24__hq_960x540.mp4.wmv':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42mp41isomavc1
    
    WM/EncodingSettings: Lavf57.83.100
    
    Stream #0:0(und): Video: msmpeg4v3 (msmpeg4) (MP43 / 0x3334504D), yuv420p(progressive), 480x320, q=2-31, 1000 kb/s, 24 fps, 1k tbn, 24 tbc (default)
    
    Metadata:
    
      creation_time   : 2019-05-27T14:37:50.000000Z
    
      handler_name    : L-SMASH Video Handler
    
      encoder         : Lavc57.107.100 msmpeg4
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/1000000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: wmav2 (a[1][0][0] / 0x0161), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-05-27T14:37:50.000000Z
    
      handler_name    : L-SMASH Audio Handler
    
      encoder         : Lavc57.107.100 wmav2
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 31 times
    
frame=  228 fps=0.0 q=2.0 size=     291kB time=00:00:09.45 bitrate= 252.4kbits/s speed=18.9x    
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 1 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
    Last message repeated 1 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
    Last message repeated 1 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
    Last message repeated 5 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 2 times
    
frame=  449 fps=449 q=2.0 size=     663kB time=00:00:18.98 bitrate= 286.2kbits/s speed=  19x    
    
frame=  629 fps=418 q=1.6 size=    1307kB time=00:00:26.16 bitrate= 409.2kbits/s speed=17.4x    
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 30 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 7 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 2 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 34 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 1 times
    
frame=  821 fps=410 q=2.0 size=    1960kB time=00:00:34.26 bitrate= 468.7kbits/s speed=17.1x    
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 71 times
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 82 times
    
frame= 1026 fps=409 q=2.0 size=    2695kB time=00:00:42.96 bitrate= 513.8kbits/s speed=17.1x    
    
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
    
    Last message repeated 102 times
    
frame= 1202 fps=400 q=1.6 size=    3754kB time=00:00:50.13 bitrate= 613.4kbits/s speed=16.7x  
    
......
    
frame=127987 fps=301 q=2.0 Lsize=  753842kB time=01:28:52.77 bitrate=1158.0kbits/s speed=12.6x    
    
video:650704kB audio:83244kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.710554%

    EDIT :
    My workaround was to encode to MPEG, doing this, i’m able to read my file and the frame rate is same as source. If someone knows why it couldn’t keep the original framerate in wmv, i’m still interested to know.

  • lossless video to h.265 - [error] : main10 profile not compatible with i422 input chroma subsampling

    24 février 2021, par spierce7

    I have a lossless .mov video and I'm trying to encode using h.265 for firetv and some other android tv devices. The spec that they support is :

    


    Based on their native H.265 support, I'm trying to export a Main 10 Profile with level 4.1.

    


    The command I'm running is :

    


    ffmpeg -i 001_lossless.mov -c:v libx265 -preset slow -profile:v main10 -level:v 4.1 -c:a aac -b:a 128k output.mp4


    


    Which yields the following error :

    


    x265 [error]: main10 profile not compatible with i422 input chroma subsampling.


    


    What is the best way to work around this ? I can request the lossless video in different formats also, but I'm not exactly sure what to ask for.

    


  • avcodec/mpeg12enc : Perform size/level/profile checks earlier

    6 avril 2021, par Andreas Rheinhardt
    avcodec/mpeg12enc : Perform size/level/profile checks earlier

    This has the advantage that one does not waste some allocations
    
if one errors out because of these checks.
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavcodec/mpeg12enc.c

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