On Sun, Aug 7, 2011 at 2:06 AM, Joel N. Fischoff <[email protected]> wrote: > Heya, > > I'm looking for a program I can use to clip segments out of a AVI or MP4 > file. Up until now, I've been using VirtualDub, but I've been having some > odd problems with it. For example, there are a few files that I have that > have a few leading seconds I want to remove, but every time I try, it > fails. It just will not take them off.
AVI (normally mpeg4) or MP4 use keyframes and then just store the differences until the next keyframe. I think the problem is that you can't just remove a few seconds without re-encoding. See: http://www.virtualdub.org/docs_processing.html "I tried to cut out some frames in direct stream copy mode, and VirtualDub put them back in!?" The only solution with VirtualDub is to use 'Full Reprocessing Mode' or 'Fast Recompress' if you're not applying any filters. Remember to select compression codecs! I think Leland's suggestion of Avidemux can work around this problem: "You use the smart copy mode. Only available for Divx3 and mpeg4. Smart copy will re-encode the part that losts its reference images with a fixed quantizer. A value of 4 or 5 is generally ok." -- Paul _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/CADwx0++NsNj1oDABhvJmjjR=j5gw8ffvjpb+fjgvqsknn3n...@mail.gmail.com ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
