GOPchop replacement?

Rick C. Petty rick-freebsd at
Tue May 29 03:09:05 UTC 2007

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.

-- Rick C. Petty

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