[FFmpeg-devel] [PATCH] Add a new channel layout API

[Paul B Mahol]

On 12/26/18, Nicolas George <george at nsup.org> wrote:
>> + * The input string can be represented by:
>> + *  - the formal channel layout name (returned by
>> av_channel_layout_describe())
>> + *  - single or multiple channel names (returned by av_channel_name()
>> + *    or concatenated with "|")
>> + *  - a hexadecimal value of a channel layout (eg. "0x4")
>> + *  - the number of channels with default layout (eg. "5")
>> + *  - the number of unordered channels (eg. "4 channels")
>
> av_get_channel_layout() used to use '+' instead of '|', and I think it
> is better. For once, '+' is not a special character for shells.

Can not work if user wants to define custom channel layout from
already available channels.