Hello Carl,
good hint.
But I have made some tests. And this raises another question:
A conventional Start of an XDCAMHD422 file has this GOP structure (closed):
B.B.I.B.B.P.B.B.P.B.B.P.B.B.I......
After FFMpeg has cut out a clip, because FFmpeg always cuts at I_frames
(doesn matter which -ss position I give, it always cuts at the nearest
I_frame):
I.B.B.P.B.B.P.B.B.P.B.B.I......
Is it possible to force FFmpeg to cut 2 frames BEFORE an I-Frame
(streamcopy)?
To get a cutout file with the first GOP structure like this:
B.B.I.B.B.P.B.B.P.B.B.P.B.B.I......
Is there a syntax to do so?
Best Regards
Christoph
Am 22.06.16 um 15:22 schrieb Carl Eugen Hoyos:
Christoph Gerstbauer <christophgerstbauer <at> gmail.com> writes:
So my need is to force FFMpeg to make an extraction via codec
copy (copy video and audiostreams) , BUT JUST ENCODE the first
GOP to a new CLOSED GOP.
Then you either have to program an application (that uses
FFmpeg libraries if you want) or run ffmpeg (the application)
several times to reencode a part and stream copy another part
and concatenate.
This may or may not lead to sync issues;-(
Carl Eugen
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