#9209: How to simplify amerge filter -------------------------------------+------------------------------------- Reporter: kvsico | Type: | enhancement Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: How to reproduce: I want to mix audio files, mono and stereo all possible, but the use of amerge filter is complicated because I should identify channel of every input[0], so I found this answer[4], the command like this: ``` ffmpeg -y\ -i a.mp3 \ -i b.mp3\ -filter_complex " [0]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo[a0];[a0]volume=1[a00];[a00]adelay=2000|2000[a000]; [1]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo[a1];[a1]volume=1[a11];[a11]adelay=4000|4000[a111]; [a000][a111]amerge,pan=stereo|c0<c0+c2|c1<c1+c3" \ -ac 2 result.mp3 ``` Can I use this command simplify use of amerge filter? [0]:https://trac.ffmpeg.org/wiki/AudioChannelManipulation [1]:https://stackoverflow.com/questions/54060729/ffmpeg-how-to-merge-all- audio-streams-into-stereo [2]:https://superuser.com/questions/1029466/how-to-mix-two-audio-files- with-ffmpeg-amerge-filter [3]:https://stackoverflow.com/questions/14498539/how-to-overlay-downmix- two-audio-files-using-ffmpeg [4]:https://superuser.com/questions/714879/simplify-ffmpeg-amerge-and- volume-customization -- Ticket URL: <https://trac.ffmpeg.org/ticket/9209> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker