expand -formats/-codecs options

[ami_stuff]

ffmpeg -codecs - would list everything
ffmpeg -codecs:a:e - would list only audio encoders
ffmpeg -codecs:a:d - would listonly audio decoders
ffmpeg -codecs:v:e - would list only video encoders
ffmpeg -codecs:v:d - would listonly video decoders

ffmpeg -formats - would list everything
ffmpeg -formats:a:d - mould list only audio demuxers
ffmpeg -formats:a:m - mould list only audio muxers
ffmpeg -formats:v:d - mould list only video demuxers
ffmpeg -formats:v:m - mould list only video muxers

[ami_stuff]

correction:

ffmpeg -formats:d - would list only demuxers
ffmpeg -formats:m - would list only muxers

[michael]

in case someone stumbles across this ticket in the search of a workaround/solution
its quite easy to achive this by using for example
ffmpeg -codecs | grep '^{.D.A'
instead of
ffmpeg -codecs:a:d}

[saste]

What's wrong about using grep?

Also I'm slightly against adopting a syntax resembling the one for stream selection, but with different features and warts, so I'd rather stick with easy grep parsing rather than bloat the code with features which can be implemented with simple scripting.

[ami_stuff]

Ok, I will close this ticket then (there seems to be also -decoders and -encoders options which I did not notice before).