[FFmpeg-user] difference between filter_complex and vf

[Atli Thorbjornsson]

>
> If it does not work, please post your complete command line and console
> output.
>

ffmpeg -i test1.flv  -i test2.flv -filter_complex
'[0]scale=iw/2:ih/2,pad=2*iw:ih[left];[1]scale=iw/2:ih/2[right];[left][right]overlay=main_w/2:0'
out.flv

This works but the audio output is from test1 only. So I try to amerge
audio and I'm thinking this... but it feels wrong and doesn't work

ffmpeg -i test1.flv  -i test2.flv -filter_complex
'[0]scale=iw/2:ih/2,pad=2*iw:ih[left];[1]scale=iw/2:ih/2[right];[left][right]overlay=main_w/2:0[out];[out][1]
amerge' out.flv


[overlay @ 0xb16c5c0] Media type mismatch between the 'Parsed_overlay_3'
filter output pad 0 and the 'Parsed_amerge_4' filter input pad 0
Cannot create the link overlay:0 -> amerge:0



> And please read the list's guidelines, especially the ones regarding
> top-posting. It is considered rude here.
>
> My sincerest apologies. I had no idea.

Atli.