[FFmpeg-devel] [PATCH v2 1/3] avformat/avformat: Deprecate AVFMT_ALLOW_FLUSH

[Martin Storsjö]

On Tue, 26 Sep 2023, Andreas Rheinhardt wrote:

> Martin Storsjö:
>> On Tue, 26 Sep 2023, Anton Khirnov wrote:
>> 
>>> Quoting Andreas Rheinhardt (2023-09-26 01:54:30)
>>>> It is of no value to the user, because every muxer can always
>>>> be flushed with a NULL packet. As its documentation shows
>>>> ("If not set, the muxer will not receive a NULL packet in
>>>> the write_packet function") it is actually an internal flag
>>>> that has been publically exposed because there was no internal
>>>> flags field for output formats for a long time. But now there is
>>>> and so use it by replacing the public flag with a private one.
>>>
>>> Is there any value for the callers in knowing whether flushing is a
>>> no-op or actually does something?
>> 
>> Hypthetically, in theory, I guess one could make a case for that. But
>> most of the codepaths where one use this anyway, one is pretty closely
>> tied to the specific muxer one is using (usually mov/mp4 or maybe mkv),
>> so in practice I don't think that's needed.
>> 
>> I don't remember there being a specific demand for that back when this
>> was added, it was only a case of us not having internal flags at the time.
>> 
>
> So if we had them back then, you would not have made the flag public?

Exactly; if we have had private muxer flags at the time, I would probably 
not have made this a public flag.

So I think this patch is fine.

// Martin