[FFmpeg-user] Seeking for a method to remove sections of a video

[James Girotti]

>
> > I ultimately run avidemux as a frontend to ffmpeg. I have avidemux save
> > (copy video and audio) to a FIFO which is then the input for my ffmpeg
> > command. From my limited testing that way supports multiple audio tracks.
> > It's not a perfect setup because you have to end cuts on key-frames, not
> > usually a problem for me though (you can start your cut wherever). Also,
> > you can see the PTS for a given frame in avidemux. So in the rare-case I
> > can manually tell ffmpeg where to cut a given segment. Generally, this is
> > the workflow I use.
>
> This is basically telling avidemux to do a copy of video and audio and
> cutting at start/end points. At least on avidemux 2 it asks what audio
> track to use, and totally ignores other tracks.
>
And avidemux 3 wants the other audio tracks to be fed from external files.
>

 From my testing avidemux(v2.6.8) will copy all tracks. No need to select
which to copy. Then you can let ffmpeg deal with which tracks to
transcode/keep, etc. Also, I might have forgotten to mention that I have
avidemux set to use MKV muxer for output.

Another point, avidemux only can use two cut points, one at the start,
> one at the end, so no, it can't be used.
>

To clarify: with avidemux you can only setup one cut at a time (starting
and ending points). Once you have the region selected, you can just delete
it, then mark the next region you want to delete/remove, repeat. The
interface is a little clunky, but this way you could cut out multiple
sections from one file.


> > Good luck and let us know what you decide to use.
>
> Well, so far, nothing.
>
> I have to leave the original recordings untouched for years till I find
> a solution.
>

Just to throw another one in the mix: comskip (http://www.kaashoek.com/comsk
ip/). I have been playing around with it. There is a SDL GUI that you can
review/adjust the results with after analysis. In the GUI, you can step
forward and back by single-frames. It supports different output formats
including EDL and XML. Major down-side is that I have not figured out how
to stop comskip from analyzing my file first (even telling it not to use
any detection methods).