Cut AVI file at non-key-frame

[cheerful]

Is there any software that I can use to cut AVI at non-key-frame?

Thanks!

[Tommyknocker]

AviSynth. Cut where you want.

[housepig]

a work around, with Virtualdub -

make your cut at the closest key frame (A). save as file #1.

using the same original avi, cut from the key frame before the cut you want (A) to the nearest key frame after the cut you want (B). save A-B as file #2.

open file #2, select full processing mode, and save as an uncompressed file. it will be big, but since you are using a really short piece of footage, it shouldn't be a problem. save this as file #3.

open file #3, do the fine cut from key frame A to the frame you want to cut. save this as file #4.

now join file #1 and #4.

sounds like more work than it is. Avi Synth is probably much easier, but I haven't used it enough to be comfortable with it.

[cheerful]

Does it mean that I have to recode the video? Will I lose quality (I guess yes)?

Thanks!

[housepig]

well, for your initial cut (up to the A cut frame), you can use direct stream copy, which won't affect the quality. and the piece you are reencoding is probably not more than a few seconds, so in the grand scheme it's not going to be that noticeable.

let's say you have a 30 second clip, 30 frames / second, and keyframes every second.

you want to cut at 00:00:10:15 (ten seconds, 15 frames). you would cut to the 10-second keyframe as your first cut, and use Direct Stream Copy. no recompression.

you cut from 10 seconds to 11 seconds (keyframe to keyframe). you have a 1 second, 30 frame clip. you blow that one up to Uncompressed, which is essentially every frame a key frame.

you cut out frames 16-30. recompress the 15 frames to match the compression in the first 10 seconds.

now join the first 10 seconds with the last 15 frames. It's 1/2 a second - you will be the only person who notices a change in quality at that point.

[cheerful]

Thanks for the help! I will try that with the small clip.

To use AVISynth, does it involve recoding?

Is Premiere a better tool for this job?

Thanks in advance!