Am 05.03.2021 um 20:33 schrieb Steven Kan:
I’d like to assemble these videos, side-by-side, but synced in time, which
means the TrailDown video needs to start 50 seconds after the TrailUp
video. The TrailDown side can be black/blank, or it can be stuck on the
first frame of its video while the right side plays for the first 50
seconds; it doesn’t matter to me.
I’ve tried all of the following:
-itsoffset 50 -i TrailDown.mp4 -i TrailUp.mp4
-itsoffset 50 -i TrailDown.mp4 -itsoffset 0 -i TrailUp.mp4
-i TrailDown.mp4 -itsoffset -50 -i TrailUp.mp4
see tpad filter, need recent version.
Thanks! I have figured out the syntax to pad a single video with tpad, e.g.:
ffmpeg -i
/Users/steven/Downloads/Record/DownLoad/TrailDown_ch1_20210304010952_20210304011838.mp4
-filter_complex "tpad=start_duration=50" tPadOut.mp4
but I’m having trouble with the syntax to delay only one of two videos in an
hstack filter:
ffmpeg -i
/Users/steven/Downloads/Record/DownLoad/TrailDown_ch1_20210304010952_20210304011838.mp4
-i
/Users/steven/Downloads/Record/DownLoad/TrailUp_ch1_20210304010838_20210304011506.mp4
-filter_complex "tpad=start_duration=50[v0];hstack=inputs=2” Coyote2Up.mp4
try this command line:
ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex
"[0]tpad=start_duration=50[a];[a][1]hstack" out.mp4
Michael
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