[MEncoder-users] Encoding using EDL

Rich Felker dalias at aerifal.cx
Mon Apr 25 03:15:46 CEST 2005

On Mon, Apr 25, 2005 at 12:38:12AM +0100, Maurice Cooper wrote:
> On 4/25/05, Scott W. Larson <scowl at pacifier.com> wrote:
> > I've been using a version of the EDL code from a month or two ago and
> > found it works very well. The problem I was having with A/V sync was
> > that the edits seemed to be screwing up a filter, but actually I wasn't
> > using the filter correctly in the first place.
> > 
> > An edit will often break an audio packet and the broken packet will
> > probably print an error. Since my edits have been during quiet sections
> > I haven't heard it cause any noise or any noticeable effects.
> > 
> > There is a problem when you attempt to edit out a section in which the
> > pts's have wrapped around back to zero. The skipping code will get
> > confused because the end of the skipped section will have a pts lower
> > than the beginning. The one time this happened to me, I had to make a
> > new version of the unedited original so its pts would start at zero and
> > redo the edits. This won't be a common situation though.
> I'm editing out three sections from 30 minute MPEG-4 files encoded
> using mencoder - removing ad breaks. By the end of the video, just
> before the last edit, the audio is approximately half a second out.
> Could it be because the files are encoded using vqscale=1?

I'm totally confused what vqscale could have to do with a/v sync....

Anyway, are you using -hr-edl-seek or not? Knowing this might help.


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