Trying to reencode audio file from mp4 container to Matroska(mkv) container using FFmpeg audio encoder adpcm_adx or (aptx, comfortnoise, g726le...) I am getting an error message
No wav codec tag found for codec ...
I have c++ code which includes thired-party integration of ffmpeg, and I am having the same result using ffmpeg terminal options.
ffmpeg -i file.mp4 -c:v copy -c:a adpcm_adx -b:a 44100 output.mkv
Instead of getting output file correctly I am getting
No wav codec tag found for codec adpcm_adx
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 -- Conversion failed!
Maybe I should specify extra parameters for making it work which I haven't hooked up yet. Thanks in advance. I'll appreciate any help.