Solved [Solved] FFMPEG constant bitrate with libvpx on FreeBSD 9

manas

manas

Hello.

I am running ffmpeg version 2.1.1. I am trying to convert a h264,ac3 .mkv to a vp8,ogg .webm file with constant bitrate. The command I am using is ffmpeg -i video.mkv -c:v libvpx -b:v 450k -minrate 450k -maxrate 450k -c:a libvorbis -b:a 48k -ac 2 video.webm. The output video file that is produced always has a very high bitrate (1000+ kbps). I would like some help with making ffmpeg produce a constant bitrate file. The source file has a size of 1280x714 and I am not altering that.

Thanks,
Manas
 
Re: FFMPEG constant bitrate with libvpx on FreeBSD 9

As an update to anyone who may encounter the same issue: I built ffmpeg and libvpx through the latest available code through Git and the issue has been resolved.
 
Re: [Solved] FFMPEG constant bitrate with libvpx on FreeBSD

The twist in the story is that while ffmpeg produces constant bitrate files for one video file, the same options applied to a different file results in a non-CBR file.
 
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