[FFmpeg-devel] [PATCH] ffmpeg options: Enable trailing ? for map_channel

[Michael Niedermayer]

On Wed, Aug 23, 2017 at 06:48:14PM +0200, pkv.stream wrote:
> Hello,
> 
> the following patch allows one to add a trailing ? to -map_channel
> as in -map option.
> 
> E.g: -map_channel 0.0.2? so that if the channel does not exist, the
> command does not stop.
> 
> This is similar to what one can do with -map.
> 
> Thanks for any input.
> 
> 

>  ffmpeg_opt.c |   24 ++++++++++++++++++++----
>  1 file changed, 20 insertions(+), 4 deletions(-)
> 28689933986d73050286e700752ace032df6dc1b  0001-ffmpeg-options-Enable-trailing-for-map_channel.patch
> From 07959dfe79816d03c30b8027f45b41d60078b3fa Mon Sep 17 00:00:00 2001
> From: pkviet <pkv.stream at gmail.com>
> Date: Tue, 22 Aug 2017 11:30:45 +0200
> Subject: [PATCH] ffmpeg options: Enable trailing ? for map_channel
> 
> The -map option allows for a trailing ? so that an error is not thrown if
> the input stream does not exist.
> This capability is extended to the map_channel option.
> This allows a ffmpeg command not to break if an input channel does not
> exist, which can be of use (for instance, scripts processing audio
> channels with sources having unset number of audio channels).
> ---
>  ffmpeg_opt.c | 24 ++++++++++++++++++++----
>  1 file changed, 20 insertions(+), 4 deletions(-)

the patch contains tabs (cannot be pushed to git master)
and this is missing an update to the documentation

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Elect your leaders based on what they did after the last election, not
based on what they say before an election.

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