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

[Yunpeng Guan]

On 1/6/2020 6:38 PM, Limin Wang wrote:
> 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/
Thank you! I will try it after reading the compile document.