ffmpeg 命令从 ffprobe 复制视频配置

Question

将 MP4 转换为类似于视频的输出格式的命令是什么 ffprobe:

ffprobe version N-82151-g1e660fe Copyright (c) 2007-2016 the FFmpeg developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-libebur128 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  libavutil      55. 35.100 / 55. 35.100
  libavcodec     57. 65.100 / 57. 65.100
  libavformat    57. 57.100 / 57. 57.100
  libavdevice    57.  2.100 / 57.  2.100
  libavfilter     6. 66.100 /  6. 66.100
  libswscale      4.  3.100 /  4.  3.100
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100
Input #0, avi, from '.\sample.mp4.hd.mojo':
  Metadata:
    encoder         : Lavf57.57.100
  Duration: 00:37:28.85, start: 0.000000, bitrate: 10461 kb/s
    Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj420p(pc, bt470bg/unknown/unknown), 960x540 [SAR 1:1 DAR 16:9], 9745 kb/s, 20 fps, 20 tbr, 20 tbn, 20 tbc
    Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 2 channels, s16, 705 kb/s

我试过了

ffmpeg -i "input.mp4" -c:v mjpeg -c:a pcm_s16le -an output.mp4

但输出不与 custom player 一起播放。

更新：

我找到了一个似乎包含一些配置的文件：

[high]
label=High quality
labelHelp=Converts to high quality
outSuffix=hd
codecParam=-vcodec mjpeg -vf scale=min'(960,iw)':-1 -acodec pcm_s16le -ar 22050 -ac 2 -r 20 -q:v 2
[medium]
label=Medium quality
labelHelp=Converts to medium quality
outSuffix=mid
codecParam=-vcodec mjpeg -vf scale=min'(960,iw)':-1 -acodec pcm_s16le -ar 22050 -ac 2 -r 20 -q:v 5
[low]
label=Low quality
labelHelp=Converts to low quality
outSuffix=low
codecParam=-vcodec mjpeg -vf scale=min'(960,iw)':-1 -acodec pcm_s16le -ar 22050 -ac 2 -r 20 -q:v 8
[main]
label=Convert to NComputing MOJO
labelHelp=Transcodes original file format to the NComputing MOJO format
outSuffix=
codecParam=

Answer 1

我终于成功了。

因此，要为 NComputing 设备制作 MOJO 视频文件，请使用 ffmpeg 命令：

ffmpeg -i "input.mp4" -vcodec mjpeg -vf scale=min'(960,iw)':-1 -acodec pcm_s16le -ar 22050 -ac 2 -r 20 -q:v 8 -f avi output.mojo

对于低质量视频。对于其他视频质量，请参考 mojo.col 文件。

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