[FFmpeg-user] Merging apad and overlay filters in complex filter

[Gyan Doshi]

On 3/5/2018 4:14 PM, C Colutions wrote:

> [audio]apad[audio];

should be

     [1:a]apad[audio];

You're sending an input file, specifically the (first) audio stream of 
the 2nd input file, to the filter, so 1:a is the designation to identify it.


Regards,
Gyan