lossless video cutting?

[Mike Velte]

[Adam Roestenburg] “how can I get my video back out Premier without any additional
compression?”

Other than the uncompressed route, you cant!

[Alex Udell]

Creating new content from compressed media requires that ultimately another compression pass be applied if you are delivering back to the same format.

Some formats may handle this better than others…but it’s the nature of the beast.

Alex

[Nicolas Favre]

Hi,
Is has been a long time that this post exists, but as some users could read it today I will give an answer.

Yes it is possible to export a new cut footage without re-encoding, with any Codecs, it is called “trimming“, but this term is badly used on the internet actually and also refer to other things in common NLEs, so it is difficult to look for information about this.

With time compressed codecs (also called “Inter-Frame Codecs”) (such as H264 for example), you can’t trim wherever you want, you need to cut between “I-Frames”. These are special frames which does not depend on other frames to be rendered, and a “GOP” (Group Of Picture) between 2 I-Frames is independant and so can be “cut” without re-encoding.

There are a lot of others codecs which are not “time compressed” (also called “Intra-Frame” Codecs) and so you can trim wherever you want (All ProRes, BRAW, RED, Cineform, DNxHD, …).

In Premiere Pro, you can do this with the “PlumePack” plugin. It’s like a Project Manager, but instead of transcoding, it can trim without re-encoding. It supports most used codecs, Time Compressed or Not ! In Resolve the native Project Manager can trim, but I didn’t try it a lot, I’m not sure it supports Time Compressed Codecs.

More infos on PlumePack for Premiere Pro : https://www.autokroma.com/PlumePack

More infos on Inter-Frame Codecs : https://en.wikipedia.org/wiki/Inter_frame

More infos on trimming with Resolve : https://www.youtube.com/watch?v=ELDvrF3ZDJQ

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[Chris Wright]

plumepack doesn’t appear to natively support .wmv.

Premiere does have a built in feature called SMART Rendering for lossless rendering. It also renders 4x faster this way because there’s no re-compression.

Unfortunately, it doesn’t appear either solution supports .wmv

You’ll have to choose between lossless and lossy encoding.

Some codecs at higher settings can give near perfect quality and visually lossless, like prores, dnx, cineform at high or ultra high settings without going full uncompressed into extremely large file sizes.

There may be a trim program that can natively cut wmv. perhaps ffmpeg can?