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I'm not familiar with FFMPEG at all and would like to know how to convert MP4 to OGV format while still keeping the same video and audio quality?
user400424
Posted 2016-07-04T19:14:31.560
Reputation: 3 314
How do I convert MP4 to OGV while still retaining the same quality using FFMPEG?
Answers
17
Basic command is
ffmpeg -i input.mp4 -c:v libtheora -q:v 7 -c:a libvorbis -q:a 4 output.ogv
You'll have to fiddle with the q values for video and audio if the result's not acceptable. Lower values are better but produce bigger files. For libtheora, it's the opposite - higher values are better. Range is 0-10.
Gyan
Posted 2016-07-04T19:14:31.560
Reputation: 21 016
... -acodec libopus -b:a 128000 worked for me for opus, the quality level isn't supported apparently. – Gringo Suave – 2019-03-15T01:03:39.287
When I convert a long video with this command (ffmpeg 4.1.3), sound stutters at some point, it [blank] like [blank] so [blank] can't [blank]stand [blank]thing. – Nicolas Raoul – 2019-05-27T13:30:53.890
That has to be related to your input. There's nothing in this command that distorts audio. – Gyan – 2019-05-27T13:54:55.887
This command re-encodes the stuff again. – Quadcubic – 2020-01-23T08:27:46.963
Related no quality request: https://superuser.com/questions/108237/convert-mp4-to-ogg-video
– Ciro Santilli 新疆改造中心法轮功六四事件 – 2019-09-07T14:33:06.600Both containers store different codecs. If the codec is H.264 then OGV cannot store it, you'll loose some quality in re-encoding, the quality may degrade further. TL;DR if the video codec isn't supported on both formats you're surely going to loose quality. – Quadcubic – 2020-01-01T09:35:55.020