[FFmpeg-user] Selecting/dropping frames without re-encoding

[Carl Eugen Hoyos]

2016-10-06 15:53 GMT+02:00 Marcelo Boufleur <mboufleur at gmail.com>:
> I'm not sure that what Mikhail wants really exists. If I understand
> correctly, you want to retain original encoding and drop one frame every
> two frames.
>
> If this would be possible, you would have to work at the DNxHD inner level,
> identify each frame start/end (by headers), bit-stream copy whichever
> frames you would need,

Fortunately, FFmpeg does all this for you: We call it "parsing" and it
is necessary for many (general) use-cases.

> and then re-generate the DNxHD layer and headers to
> reflect all the changes you have made.

No such header exists for dnxhd, just for mxf.

Carl Eugen