Trimming/Extracting video segments without re-encode

[sdsumike619]

I've seen a number of threads about splitting or joining files, but suppose I have an hour long video, and I just want to extract a 30 second section of that video into a new file, but without any reencoding? Is it possible, and what is the best tool in your experience for it? The reason I want to do this is to avoid having to make duplicate copies of full video files just to use a tiny portion of them in another project. Thank you

[smrpix]

Methods/tools for trimming losslessly depend on the video format/codec. Tell us more about your files, preferably a MediaInfo report.

[sdsumike619]

Mostly h.264 files, and some DV avi files

[davexnet]

How about trim() in avisynth, and save as a lossless AVI file ?

[sdsumike619]

avisynth is too complicated,, so far avidemux seems to be the best thing going from what I can see

[davexnet]

avisynth is too complicated,, so far avidemux seems to be the best thing going from what I can see

Does Avidemux handle the situation where the cut-in point is not a key frame ?

[sdsumike619]

I have no idea about that, out of my league.. my trim doesn't have to be that exact, I can trim it as needed in the video editing software. I'm just trying to keep from having to copy a huge multi GB file just to get a few seconds or minute from it.

[netmask56]

Womble v5 could do it. http://www.womble.com/

[JVRaines]

Mostly h.264 files, and some DV avi files

VirtualDub can losslessly trim/edit DV-AVI. I use it for that purpose all the time.

[Adithya]

I've tried with FFMpeg it's not that great but does not re-encode. But when i don't have time to rewrite the batch file i used this http://www.spgsoft.com/video-splitter.html

Have to admit it's rather brilliant apart from the fact that in the output quality don't select same quality it's a deprecated command just select high quality