ffmpeg 无法将 mp4 转换为 mp3 输出文件 #0 不包含任何流

Question

我无法通过 ffmpeg 将 mp4 文件转换为 mp3。我尝试了这些命令，但它们不起作用并显示相同的错误:

Output file #0 does not contain any stream

这些是命令:

ffmpeg -i input.mp4 -c copy  -f mpegts output.mp3

ffmpeg -i input.mp4 -acodec libmp3lame output.mp3

ffmpeg -i input.mp4 -vn -f mp3 -ab 192k output.mp3

ffmpeg -i input.mp4 -vn -f wav - | \
       lame -V 3 - output.mp3

请帮我。

这是日志-> ffmpeg -i input.mp4 -c copy -vn output.mp3

ffmpeg version 2.8.8 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  configuration: --disable-static --enable-gpl --enable-version3 --enable-nonfree --enable-shared --enable-libmp3lame --enable-libx264 --enable-libvpx --enable-libvorbis --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-libtheora --enable-libxvid --enable-libfdk_aac --enable-libopus --enable-libfreetype --enable-libfaac
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : dash
    minor_version   : 0
    compatible_brands: iso6avc1mp41
    creation_time   : 2018-05-11 00:18:13
  Duration: 00:44:01.47, start: 0.000000, bitrate: 61 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 0 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
    Metadata:
      creation_time   : 2018-05-11 00:18:13
      handler_name    : VideoHandler
Output #0, mp3, to 'output.mp3':
Output file #0 does not contain any stream

Answer 1

您的输入视频似乎可能不包含音频流。