[FFmpeg-devel] [PATCH] Stream specifier enhancement

[Bodecs Bela]

Dear All,

currently stream specifiers may contain stream index, stream type,
stream id, program id, metadata key/value es usable config settings.
But you can not combine them. In some case, mainly working with
multiprogram mpeg-ts containers as input, this feature would be handy.
This patch makes it possible to combine them.
Examples: p:601:a  will select all audio streams of program 601,
a:m:language:hun will select all audio streams marked by its metadata
  as hun language,
p:604:v:0  will select first video stream of program 604,
a:m:language:hun:0 will select 1st audio streams with hun language.
p:403:s:0 will select the first avaiable sub_title tream of program 403,
and p:403:s:m:language:hun:0  will select the first hungarian language
sub_title stream of program 403.  To select first hungarian language
audio stream a:m:language:hun:0
The order of sub-specifiers (program/type/metadata/usable_config) is
arbitrary. So, you may also write v:p:604:0 to select first video stream
of program 604

Please consider to put this enhancement into the official ffmpeg code.

best regards,

Bela Bodecs

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