[FFmpeg-devel] [PATCH]lavc/avcodec: Allow libavcodec to overwrite profile and level

Carl Eugen Hoyos ceffmpeg at gmail.com
Fri Nov 24 01:47:16 EET 2017

2017-11-23 22:58 GMT+01:00 Michael Niedermayer <michael at niedermayer.cc>:
> On Thu, Nov 23, 2017 at 04:01:06PM +0100, Carl Eugen Hoyos wrote:
>> Hi!
>> The (external) encoders may overwrite level and profile because of
>> requested encoding properties, allowing libavcodec to (also) overwrite
>> them in the context makes sense (and is already done in some cases
>> afaict).
>> Please comment, Carl Eugen
> If a user needs to generate a file with a specific profile/level
> for example because its for broadcast, some specification or a hw
> decoder.
> How could he after this patch ensure that exactly the needed profile
> is used?

Afair, x264 does change profile and / or level depending on properties
set by the user. Currently there is no way for the libavcodec user to
know that libx264 changed something.
With this change the user can know that he does not get the
requested values.

Or am I wrong and libx264 never overwrites requested values
for level and / or profile?

Carl Eugen

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