CODEWITHSUNDEEP
ffmpegmp4mkv
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Reputation: 1337

ffmpeg errors from converting mkv to mp4

I've been using ffmpeg to convert mkv to mp4 and the following is the command I used.

ffmpeg -i demo.mkv -vcodec libx264 -vprofile high -crf 28 -c:v h264 demo.mp4

But now I got errors when I tried to convert a new mkv file. I've done quite extensive search online, but so far I haven't been able to find a solution.

The following are screen outputs, which include version and library info.

ffmpeg version N-101385-gb34d1de Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.4)
  configuration: --enable-gpl --enable-nonfree --enable-libx264 --enable-libmp3lame --enable-libass
  libavutil      56. 66.100 / 56. 66.100
  libavcodec     58.128.100 / 58.128.100
  libavformat    58. 70.100 / 58. 70.100
  libavdevice    58. 12.100 / 58. 12.100
  libavfilter     7.107.100 /  7.107.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100      libpostproc    55.  8.100 / 55.  8.100
[av1 @ 0x2e66180] Your platform doesn't suppport hardware accelerated AV1 decoding.
[av1 @ 0x2e66180] Failed to get pixel format.
[av1 @ 0x2e66180] Missing Sequence Header.
    Last message repeated 122 times    [av1 @ 0x2e66180] video_get_buffer: image parameters invalid
[av1 @ 0x2e66180] get_buffer() failed
[av1 @ 0x2e66180] thread_get_buffer() failed
[av1 @ 0x2e66180] Failed to allocate space for current frame.
[av1 @ 0x2e66180] Get current frame error
[matroska,webm @ 0x2e62580] decoding for stream 0 failed
[matroska,webm @ 0x2e62580] Could not find codec parameters for stream 0 (Video: av1 (Main), none(tv, bt709), 1920x1072 [SAR 1:1 DAR 120:67]): unspecified pixel format
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, matroska,webm, from 'demo.mkv':
  Metadata:
    COMPATIBLE_BRANDS: iso6av01mp41
    MAJOR_BRAND     : dash
    MINOR_VERSION   : 0
    ENCODER         : Lavf58.70.100
  Duration: 00:13:39.08, start: -0.007000, bitrate: 779 kb/s
  Stream #0:0: Video: av1 (Main), none(tv, bt709), 1920x1072 [SAR 1:1 DAR 12 0:67], 25 fps, 25 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      HANDLER_NAME    : ISO Media file produced by Google Inc.
      VENDOR_ID       : [0][0][0][0]
      DURATION        : 00:13:39.000000000
  Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      DURATION        : 00:13:39.081000000
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 0, only the last option '-c:v h264' will be used.
Stream mapping:
  Stream #0:0 -> #0:0 (av1 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (opus (native) -> aac (native))
Press [q] to stop, [?] for help
[av1 @ 0x2e6ad40] Your platform doesn't suppport hardware accelerated AV1 decoding.
[av1 @ 0x2e6ad40] Failed to get pixel format.
Error while decoding stream #0:0: Function not implemented
[av1 @ 0x2e6ad40] Missing Sequence Header.
Error while decoding stream #0:0: Invalid data found when processing input
... [the above two lines repeated dozens of times]
[av1 @ 0x2e6ad40] video_get_buffer: image parameters invalid
[av1 @ 0x2e6ad40] get_buffer() failed
[av1 @ 0x2e6ad40] thread_get_buffer() failed
[av1 @ 0x2e6ad40] Failed to allocate space for current frame.
[av1 @ 0x2e6ad40] Get current frame error
Error while decoding stream #0:0: Invalid argument
... [the above 6 lines repeated hundreds of times]
[av1 @ 0x2e6ad40] Failed to get reference frame.
Error while decoding stream #0:0: Invalid argument
Cannot determine format of input stream 0:0 after EOF
Error marking filters as finished
[aac @ 0x2ed0f00] Qavg: 3268.314
[aac @ 0x2ed0f00] 2 frames left in the queue on closing
Conversion failed!

Note that the three dots (...) indicate omitted lines which repeated numerous times. Any help is appreciated.

Upvotes: 1

Views: 3721

Answers (1)

Gyan
Gyan

Reputation: 93369

Your input video stream uses AV1 codec, and as the log says,

Your platform doesn't suppport hardware accelerated AV1 decoding.

You will need a ffmpeg build with support of an AV1 decoder such as libdav1d. Available at https://johnvansickle.com/ffmpeg/

Upvotes: 4

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