[FFmpeg-user] Two video streams generated with map, filter_complex, scale

[Erik Dobberkau]

> Thanks... that helps, but it doesn't really explain why it's different in
> 4.4.2.  Was this a bug that was fixed?  Or was the behavior intentionally
> changed?
>
> I'm mostly curious more than anything.  I have a perl script that relied
> on the 4.4.2 behavior and I'm pondering the best way to fix it to support
> ffmpeg > 6.1.2.
>

See
https://git.ffmpeg.org/gitweb/ffmpeg.git?a=search&h=HEAD&st=commit&s=ost_add
esp.
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/eeb7d92ac77dfc18a46614c4b38c0c72d770dc4e
--- it's only a guess. Seems the complex_filtergraph output wasn't properly
included when checking for the required outputs. It's one of the
"interesting" occasions where people sometimes have endless debates on
whether this is/was a bug or not.
-> moving forward, the "newer" syntax is the way to go.

Erik