Hi,
I am trying to build a command line that performs the following (all
values for example):
Fast seek into the video sample 10 seconds, then slow seek for 5 seconds
giving a start point for my new clip at 15 seconds.
I then wish to have the clip start with 2 seconds of black followed by a
fade from black of 1 second.
Similarly at the end of the clip I wish to fade to black for 1 second
followed by 2 seconds of black.
From the seek point I require my total clip duration to be 20 seconds.
Assuming what I require is possible on a single pass what would be the
correct values for t1 and t2 in the example give.
From my experiments the values seem to be dependent on the seek and
duration parameters but I have not been able determine the exact
relationship.
Example:
linux ffmpeg version git-2019-06-08-b6ca032
Test.mp4 : Duration: 00:10:00.05, start: 0.000000, bitrate: 280 kb/s
ffmpeg -ss 10.000 -i Test.mp4 -ss 5.000 -t 20.000 -filter_complex
fade=type=in:duration=1:start_time=t1,fade=type=out:duration=1:start_time=t2
-y Test.avi
Any suggestions ?
Thanks
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