[Ffmpeg-devel] watermark vhook and -vcodec copy

[Chris]

> 
> OK, so what you want is reencoding for a while, up to the first
> keyframe after a given timestamp, then framecopy for the rest of the
> file? This is possible but not currently supported. You can do it
> manually with some fancy cuts, but it'll be a pain.
> 
> Rich
> 


That is exactly what is required (either watermark at beginning or end).

In the absence of it been supported, my process is (for watermark at last 10
sec of a 60 sec file):

ffmpeg -i in.mpg -vcodec copy out1.mpg -t 50

then

ffmpeg  -i in.mpg -vhook "watermark.so -f wm.gif" out2.mpg  -ss 50

then 

truncate out1.mpg at last full gop

then

concat out1.mpg out2.mpg


It is a bit clunky but does the job.

Regards,

Chris