I have an MXF file with 16 audio mono streams and I need to recode it in a mp4 file with 2<=n<=16 channels merging input streams, e.g. input channels 1 and 2 on output channel 1 and 9 and 10 on output channel 2. This job will be done with ffmpeg. I read the documentation and found the amerge and amix filters that would be nice, but they output one channel only. Is there any solution for this problem?
Thanks,Laura
Find below the output of ffprobe on mxf file:
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{"index":1,"codec_name":"pcm_s24le","codec_long_name":"PCM signed 24-bit little-endian","codec_type":"audio","codec_time_base":"1/48000","codec_tag_string":"[0][0][0][0]","codec_tag":"0x0000","sample_fmt":"s32","sample_rate":"48000","channels":1,"bits_per_sample":24,"r_frame_rate":"0/0","avg_frame_rate":"0/0","time_base":"1/48000","start_pts":0,"start_time":"0.000000","duration_ts":860160,"duration":"17.920000","bit_rate":"1152000","bits_per_raw_sample":"24","disposition":{"default":0,"dub":0,"original":0,"comment":0,"lyrics":0,"karaoke":0,"forced":0,"hearing_impaired":0,"visual_impaired":0,"clean_effects":0,"attached_pic":0,"timed_thumbnails":0 },"tags":{"file_package_umid":"0x060A2B340101010501010D2313000000968F75C6B5B34D649967EEDD0076B989" } }, {"index":2,"codec_name":"pcm_s24le","codec_long_name":"PCM signed 24-bit 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