[FFmpeg-user] difference between filter_complex and vf

Atli Thorbjornsson atlithorn at gmail.com
Sun Jun 3 12:52:30 CEST 2012

On 3 June 2012 07:34, Nicolas George <nicolas.george at normalesup.org> wrote:

> amerge is used to merge several audio channels together, and you are
> plugging it to the output of the overlay filter, i.e. video. That does not
> make sense. Try '[0:1][1:1] amerge'.

Thanks for you help NIcolas, so I tried the following

ffmpeg -i test1.flv  -i test2.flv -filter_complex
amerge' out.flv

It returns

[buffersink @ 0xa1255c0] No opaque field provided
[abuffersink @ 0xa066920] No opaque field provided, an AVABufferSinkParams
struct is required

Thanks for your help, I'm really groping in the dark here.


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