The entire concept of anycodings_ffmpeg "channel layout" is centered around the anycodings_ffmpeg idea, that each audio channel should go to a anycodings_ffmpeg different speaker.īut my audio channels are anycodings_ffmpeg not speaker feeds at all. However, I really don't care about the anycodings_ffmpeg channel layout.
So ffmpeg cannot guess the channel layout anycodings_ffmpeg for a 17 channel file.įfmpeg -layouts only anycodings_ffmpeg lists channel layouts with 1,2,3,4,5,6,7,8 anycodings_ffmpeg & 16. Output channel layout is not set and cannot be guessed from the maps. However, it fails with 9 channels, and 25 anycodings_ffmpeg and 17 (and generally anything with anycodings_ffmpeg >16 channels). This works great with 1,2,4 or 16 channels. The actual channel extraction is done via anycodings_ffmpeg the channelmap filter, that is invoked with anycodings_ffmpeg something like -filter:complex anycodings_ffmpeg "channelmap=0|1|2|3"
c:a libopus -mapping_family 255 -b:a 160k -sample_fmt s16 -vn -f webm -dash 1 \
the first 25 anycodings_ffmpeg channels of a file that contains even more anycodings_ffmpeg channels).įor this I have a script like the following, anycodings_ffmpeg that takes a multichannel input file, an anycodings_ffmpeg output file and the number of channels I anycodings_ffmpeg want to extract: #!/bin/shĬhannelmap=$(seq -s"|" 0 $((channels-1))) Sometimes I'm only interested in a subset of anycodings_ffmpeg the audiochannels (e.g. I'm working with multichannel audio files anycodings_ffmpeg (higher-order ambisonics), that typically anycodings_ffmpeg have at least 16 channels.
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