FFMPEG hwaccel конвертировать WEBM в MP4 видео не удалось: не удалось найти код c параметров - PullRequest
1 голос
/ 18 апреля 2020

Я использую FFMPEG для преобразования видео webm в формат mp4, используя карту Nvidia GPU GeoForce GTX 1660 на Windows 10. Она отлично работала с самого начала в течение нескольких месяцев, но теперь перестала работать со странной ошибкой, как показано ниже:

[h264 @ 0000013d8b5eee00] missing picture in access unit with size 431
[extract_extradata @ 0000013d8b6aef40] No start code is found.
big-buck-bunny-trailer.webm: could not find codec parameters

Версия FFMPEG и версия драйвера Nvidia такие же, как и до того, как он рухнул в одночасье без подсказки. Я попробовал Googling и сделал обновление до последней версии ffmpeg, а также версии драйвера Nvidia, но это все равно не помогает. Если я переключаюсь на CPU-декодер (без hwaccel arg), используя libx264, он просто отлично работает.

Environment Windows 10 64bit | версия ffmpeg git -2020-04-15-51db0a4 (последняя версия) | Nvidia GeForce GTX 1660, - Geoforce Game Ready Версия драйвера: 445.87 Дата выпуска 15 апреля 2020 г.

 ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i big-buck-bunny-trailer.webm -c:v h264_nvenc output.mp4

ffmpeg version git-2020-04-15-51db0a4 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200328
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 42.102 / 56. 42.102
  libavcodec     58. 78.102 / 58. 78.102
  libavformat    58. 42.100 / 58. 42.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 77.101 /  7. 77.101
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[h264 @ 0000013d8b5eee00] missing picture in access unit with size 431
[extract_extradata @ 0000013d8b6aef40] No start code is found.
big-buck-bunny-trailer.webm: could not find codec parameters
WARNING: defaulting hwaccel_output_format to cuda for compatibility with old commandlines. This behaviour is DEPRECATED and will be removed in the future. Please explicitly set "-hwaccel_output_format cuda".
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, matroska,webm, from 'big-buck-bunny-trailer.webm':
  Metadata:
    encoder         : http://sourceforge.net/projects/yamka
    creation_time   : 2010-05-20T08:21:12.000000Z
  Duration: 00:00:32.48, bitrate: N/A
    Stream #0:0(eng): Video: h264, none, 640x360, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn (default)
    Stream #0:1(eng): Audio: vorbis, 44100 Hz, mono (default)
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))
Press [q] to stop, [?] for help
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 66
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1339
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1415
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1908
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[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2467
Too many packets buffered for output stream 0:1.
[aac @ 0000013d8b6bf5c0] Qavg: 115.929
[aac @ 0000013d8b6bf5c0] 2 frames left in the queue on closing
Conversion failed!

Кто-нибудь знает, как это исправить, я застрял на несколько дней? Очень ценится!

1 Ответ

0 голосов
/ 21 апреля 2020

Мне удалось это исправить, указав libvpx в качестве декодера как

ffmpeg -y -vsync 0 -hwaccel cuvid -c:v libvpx -i big-buck-bunny-trailer.webm -c:v h264_nvenc output.mp4

Это имеет смысл, потому что libvpx, несомненно, способен декодировать видео webm. Просто удивляйтесь, почему h264_cuvid больше не может выполнять эту работу.

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