[CinCV TNG] MPEG-2 native lossless editing without re-encoding

Einar R√ľnkaru einarrunkaru at gmail.com
Thu Dec 29 16:32:20 CET 2016



On 12/29/2016 05:18 PM, JCA wrote:
> While I defer to your expertise, which is no doubt far deeper than mine
> (almost nonexistent, at any rate) the truth is that a simple google
> search returns many links to tools (under Windows and Mac, never Linux,
> and non-free, mostly) that, purportedly, get the job done, together with
> comments from people who claim that it is by no means impossible, and
> describe ways (clunky, apparently impractical, and probably dubious, to
> be sure) to do it.
>
> Anyway, it is not my intent to start a war here; I would not have the
> necessary minimum knowledge to wage it, anyway. I just want to tackle a
> problem that is easily described: I have some x.264 video material that
> I would like to edit with single-frame accuracy. Can this video be
> processed (by Cinelerra, or some other tool) into a different format, so
> that Cinelerra can do the editing? If I understand things correctly,
> conceptually it would be a matter of uncompressing the x.264 video
> (obtaining a much larger output video), work on the uncompressed video,
> and then compress the resulting video material with x.264. Can this be
> done, in a (relatively) simple way, without loss of quality, with the
> help of Cinelerra?
>

Overall answer is yes.

If you want to use CV branch - this currently does not support x.264 - 
you have to reencode:
http://www.g-raffa.eu/Cinelerra/HOWTO/get_media_ready.html

GG afaik supports H.264 directly.

Einar


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