On 2021-04-23 11:37, Michael Koch wrote:
Am 22.04.2021 um 23:27 schrieb Ulf Zibis:
Am 22.04.21 um 13:01 schrieb Michael Koch:
Am 22.04.2021 um 12:50 schrieb Ulf Zibis:
Hi,
I want to filter a video from pts 0 to 1999 with filter A, then
from 2000 to 2199 with filter B, from 2200 with filter A and
finally the whole stream with filter C.
Can one please give me an example for a working command line?
untested:
ffmpeg -i input.mp4 -lavfi
split[a][b];[a]filter_A[c];[b]filter_B[d];[c][d]select=bitor(between(t,0,1999),between(t,2200,10000)),filter_C
out.mp4
I found out, that the 'between(t,a,b)' should be surrounded by colons.
But anyway the reality is more complex. I have to use 3 different
filters. So I tried:
ffmpeg -i input.mp4 -filter_complex
"split[a][b][c];[a]filter_A[d];[b]filter_B[e];[c]filter_C[f];[d]select='between(t,0,1999)';[e]select='between(t,2000,2199)';[f]select='between(t,2200,10000)'",filter_D
out.mp4
With this I got a weird file with 3 video streams:
I think in this example it's not correct how you are using the select
filter.
The select filter needs two or more inputs, and it selects one of them
and passes this stream to the output.
You may be thinking of the interleave filter. select uses exactly one input.
On this topic generally, see https://superuser.com/q/1632998/
Regards,
Gyan
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