On Fri, Jan 18, 2013 at 2:55 PM, Mike Versteeg <[email protected]> wrote: > I have been using a recorder (based on muxer example) satisfactorily > for quite some time for various formats. Now I need to use > uncompressed audio to go with MJPEG video and I notice video speeds up > considerable (like 10 times as fast) in the recorded file. Audio is > OK, and if I use a compressed audio format (like mp3) video is fine as > always. Does anyone have an idea why video speeds up the moment I use > uncompresseed audio (CODEC_ID_PCM_S16LE)? > > Mike Versteeg > mikeversteeg.com
I was waiting for a more educated guess, but if it is not coming, here is my 2ยข: When you switch to PCM (raw) audio, there is no container left to keep track of timestamps, therefore playback happens at the full speed of your CPU. The problem is that MJPEG itself is time agnostic. BR, Alex _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
