![]() ![]() The libvpx encoder can also work with variable quality, using the -qmin, -qmax options: ffmpeg -i in.m4v -c:v libvpx -qmin 10 -qmax 42 -c:a libvorbis out.webm for constant 1 MBit/s: ffmpeg -i in.m4v -c:v libvpx -b:v 1M -c:a libvorbis out.webm To force a bit rate during conversion, do the following, e.g. It depends on how good the quality of your input video is, and how easy the video is to encode. How much, you ask, will it increase? No one can tell. The downside is, of course, that the file size will increase. That means you will lose quality no matter what, unless you set the target bit rate so high that the quality loss won't be noticeable (even if it's still there). You're going from a lossy codec to another lossy codec. ![]() I would like the properties of the input file to be the same for the output file, so that I do not have a noticeable quality change. ![]()
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