GOPchop replacement?

Anish Mistry amistry at
Tue May 29 15:19:12 UTC 2007

On Monday 28 May 2007, Rick C. Petty wrote:
> On Sun, May 27, 2007 at 10:37:09PM -0600, M. Warner Losh wrote:
> > I'm looking to do non-linear editing, clip extraction, etc from a
> > set of videos I've shot.  These videos are from a DV camera, and
> > I've processed them down into MPEG2 format for DVDs.  I no longer
> > have the DV originals.  I was wondering if there's any good
> > non-linear editor for these things.  So far the best thing I've
> > found is GOPchop, which is still extremely primitive.  Are there
> > any others?  There's many in the multimedia category that look
> > like they might do the trick, but so far I've come up empty.
> I use avidemux2 to generate the cut points (in my case, I'm cutting
> out commercials, etc.) but I've found that avidemux2 has A/V sync
> problems when you try to save, so I use multimedia/dvbcut to do the
> actual cuts.  The nice thing about dvbcut is it will only recode
> frames if the cut endpoints aren't at keyframes..  but between
> remaining keyframes, it performs a flawless copy.  Unfortunately
> dvbcut's UI is difficult to use, especially for marking the cut
> points.
> So I use avidemux2 to mark the cut spots, save the project, and I
> have a python program which converts avidemux2 project files into
> dvbcut project files.  I've also been requantizing the video to DVD
> quality because my tuner card records at broadcast quality MPEG2
> (15 Mbit/s) which is too high for DVD..  For this, I use another
> python script which uses a combination of mpgtx, lame, ffmpeg,
> transcode, and mjpegtools and also converts the MP2 into AC3.
The avidemux2 sync issues should be fixed in the 2.4 SVN.  If anyone 
is interested I'll roll up a tarball and post a port skeleton.

Anish Mistry
amistry at
AM Productions
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