[FFmpeg-user] Selecting MPEG TS child streams for filter_complex

[Mark Filipak]

On 03/16/2020 04:37 PM, Carl Zwanzig wrote:
> On 3/16/2020 6:24 AM, Gyan Doshi wrote:
>> -filter_complex is a global option, so parsed first, then input files, then the complex filtergraphs are set up, then output files.
> 
> Is there any reason, then, not to always put -filter_complex as the first parameters of the command line? The Synopsis line in the docs shows global options first but most of the doc examples don't.
> 
> Example-
> ffmpeg -i video.mkv -i image.png -filter_complex '[0:v][1:v]overlay[out]' -map '[out]' out.mkv"
> 
> Or is there another reason for listing inputs, then -filter_complex, then outputs?

I've been told several times by several gurus that filters, including filter_complex, are output specific must be specified directly before the output to which they apply, and. for processes that have multiple outputs, can be differently for each output.

HTH,
Mark.