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?
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Related no quality request: superuser.com/questions/108237/convert-mp4-to-ogg-video– Ciro Santilli OurBigBook.comCommented Sep 7, 2019 at 14:33
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Both 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.– tripulseCommented Jan 1, 2020 at 9:35
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1 Answer
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.
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-acodec libopus -b:a 128000worked for me for opus, the quality level isn't supported apparently. Commented Mar 15, 2019 at 1:03