Tom Metro wrote: > I'll have to experiment with mencoder options... > > This page: > http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-dvd-mpeg4.html#menc-feat-dvd-mpeg4-av-sync > > suggests setting -mc 0 and -noskip to improve A/V sync, if your source > material started with good sync.
That didn't work well at all. During the first half of a half-hour show, it seemed pretty good. But during the second half, after a commercial break, there was substantial A/V offset, and jumping around or hitting the record button couldn't correct it. I'm guessing that maybe those frame rate shifts that I saw weren't compensated for when these options were used. > ...and whether the "harddup video filter" documented here: > http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-dvd-mpeg4.html#menc-feat-dvd-mpeg4-muxing-filter-issues > > helps... I reprocessed the same video with this filter, and it solved the problem I saw above, and sync was generally very good, though not perfect. At least once I still needed to compensate for a slightly perceptible offset. I'm not entirely convinced that this filter even did anything, and that there was a difference from the prior transcodes I did with no audio sync options. One thing that makes me skeptical is that I still saw the warnings about skipped frames (same as with no options), and never a warning about a frame being added. I also am not sure that mencoder applies video filters when you are using the copy codec. I'll have to test more files, and see if there is any difference in the file size between a run with "-vf harddup" and a run without. In theory, they should be different. -Tom ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mvpmc-users mailing list Mvpmc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mvpmc-users mvpmc wiki: http://mvpmc.wikispaces.com/
