04:41
In complex filters specifically, is there a situation where it is necessary to use the split filter, rather than use the same input multiple times?
For example, consider the following FFmpeg command:
ffmpeg -i input.mp4 -filter_complex \\
"[0:v]hflip[out1]; \\
[0:v]boxblur=10[blurred]; \\
[out1][blurred]hstack[out]" \\
-map "[out]" output.mp4
It seems to work perfectly fine, But I saw some tutorials consistently using "split" in situations like this, where the input is split before any other filters are applied, making me wonder if there are unintended (...)