[FFmpeg-devel] [PATCH] Clearer wording of audio channel maping limitations

Clément Bœsch ubitux at gmail.com
Wed Dec 21 17:26:01 CET 2011

On Wed, Dec 21, 2011 at 04:18:53PM +0000, Tim Nicholson wrote:
> >> -Note that "-map_channel" is currently limited to the scope of one input for
> >> -each output; you can't for example use it to pick multiple input audio files
> >> -and mix them into one single output.
> >> +Note that "-map_channel" is currently limited to the scope of one input stream for
> >> +each output stream;
> >
> >Adding "stream" is indeed a good idea. I'd actually even reword it
> >emphasis that "one output stream is associated with one single input
> >stream"; I think it's easier to visualize that the output stream can't be
> >composed of multiple inputs. It enlightens the fact that -map_channel is
> >(currently) limited to filtering and reordering.
> OK then, a bolder rewording......

Since you're changing the paragraph anyway, let's take the opportunity to
fix the whole thing :)

> Should I keep them as separate patch stages, or should I have merged them?
> I tried a rebase but nothing happened....

You need to edit your patch and submit it again. The simpler thing to do
in your case is to do some changes and then commit them with `git commit
-a --amend`. It should squash your changes within the last commit.

> >
> >>                      you can't, for example, use it to pick multiple input audio channels
> >> +contained in different streams (from the same or different files) and mix them into one single
> >> +output stream in order to turn two separate mono streams into a single stereo stream.
> >>  
> >
> >You start that part of the sentence with an "abstraction" ("pick multiple
> >input audio channels contained in different streams") and end up with a
> >very specific example; I think it would be better split.
> >
> Interesting observation, as originally I had it split, but then tried to reduce/simplify it...
> >Also, could you keep the 80 columns wrapping?
> Sorry, I was relying on keeping within other, existing, lines that were over 80 ;(

AFAIK that paragraph doesn't have more than 80 characters per line...

Clément B.
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