[FFmpeg-user] amix parameter 'inputs' out of range [1 - 1024]

[Limin Wang]

On Mon, Jan 06, 2020 at 10:10:44AM +0000, Yunpeng Guan wrote:
> Hello everyone:
> 
> I was adding tons of audio files to a video, my command looks like this:
> 
> ffmpeg -i video.mp4 -i 0.mp3 -i 1.mp3 ...... -i 1291.mp3 -filter_complex 
> "[1]adelay=670[a0];[2]adelay=2209[a1];[3]adelay=3748[a2] ...... 
> [1292]adelay=4011880[a1291];[a0][a1][a2] ...... 
> [a1291]amix=inputs=1292,loudnorm[a]" -map 0:v -map "[a]" output-video.mp4
> 
> Then I get this error:
> 
> [amix @ 0x7ff7811a6940] Value 1292.000000 for parameter 'inputs' out of 
> range [1 - 1024]
>      Last message repeated 1 times
> [amix @ 0x7ff7811a6940] Error setting option inputs to value 1292.
> [Parsed_amix_1292 @ 0x7ff7811a6720] Error applying options to the filter.
> [AVFilterGraph @ 0x7ff789229160] Error initializing filter 'amix' with 
> args 'inputs=1292'
> Error initializing complex filters.
> Numerical result out of range
> 
> Is this a limit of amix? What should I do to burn these audio files to 
> one video? Thanks.

I submit a patch to remove the limit of max, you can try it.
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200106102923.5280-1-lance.lmwang@gmail.com/


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-- 
Thanks,
Limin Wang