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#2
21st May 2008, 02:13
I need a codec profile that I can use to archive video coaching footage. I need to be able to smoothly track back and forth with the progress bar and frame step back and forwards. So I'm looking for a profile that doesn't use p or b frames and uses gop sizes of 1 every frame a key frame. What whould be some good options for this. I am happy with about a 1/3 compression to keep as much detail as possible.

I've tried a modified HQ insane profile in megui with x264 but really not sure if I am on the right track.

Any help would be greatly appreciated.

JohnnyMalaria
21st May 2008, 02:28
Personally, I'd keep it as DV - you'll find it much more suitable for your needs.

#2
27th May 2008, 02:19
Thanks but I would like to be able to compress it to 30 % or so. Also is it possible to run tdeint and a denoiseing filter with out recompressing and keeping it as dv?

Thanks for your help.

JohnnyMalaria
27th May 2008, 03:14
DV compression is fixed - the bitrate is always the same.

olyteddy
27th May 2008, 03:49
Actually a lot depends on your choice of player. VirtualDub works really well for frame by frame analysis of any format it supports. I use mostly MPEG2 stuff (Hauppauge capture card - not much choice) and I use VDub Mod or MPEG when I want to look slow and close. One downside is VDub seems to want to load the whole file.

foxyshadis
27th May 2008, 05:50
Do you absolutely require every frame as an I-frame? Then just use MJPEG and pick a bitrate/quality if you absolutely have to deinterlace and recompress. If you can deal with, say, every 3rd frame as an I-frame, or every 10th, etc, then you can get huge compression gains by using xvid (EQM UHR matrix, Q2 or 3, no B-frames) and very minimal lag on editing. That's what I always use for intermediates.

#2
28th May 2008, 01:58
Hey thanks guys.

So I'm waisting my cpu time with an HQ x264 recompress with low gop sizes?

I take it I can't deinterlace and smooth with out recompressing?

Thanks again.

Blue_MiSfit
28th May 2008, 20:36
Nope. If you apply any sort of change to the actual video - i.e. change pixels - you have to re-encode.

~MiSfit