Question

我正在尝试两个编解码器，并且想知道我是否可以改进webm输出的结果......

ffmpeg -i test.ts -t 10 -f webm -vcodec libvpx output.webm

匹配mp4输出的质量......

ffmpeg -i test.ts -t 10 -b 1500k -vcodec libx264 output.mp4

什么设置会给我最好的webm rip？

感谢。

编辑：尝试一些rip改进时，这是一个错误输出......

ffmpeg -i test.ts -c:v libvpx -crf 4 -b:v 1M -c:a libvorbis output.webm

ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
  built on Apr  2 2013 17:00:59 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[mpeg2video @ 0x9cde5c0] mpeg_decode_postinit() failure
    Last message repeated 4 times
[mpegts @ 0x9cda240] max_analyze_duration reached
[mpegts @ 0x9cda240] PES packet size mismatch
Input #0, mpegts, from 'test.ts':
  Duration: 00:03:59.53, start: 4630.845422, bitrate: 1977 kb/s
    Stream #0.0[0x20b]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 64:45 DAR 16:9], 15000 kb/s, 25.60 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x28f]: Audio: mp2, 48000 Hz, stereo, s16, 224 kb/s

Unrecognized option 'c:v'
Failed to set value 'libvpx' for option 'c:v'

Answer 1

已解决:)

Lord Neckbeard在https://stackoverflow.com/a/9477756/1109017评论中发表了这些评论澄清了ffmpeg和avconv之间令人困惑的情况。

编辑：根据评论。

使用ffmpeg提高webm视频的质量

1 个答案: