[FFmpeg-devel] [PATCH][RFC] avcodec/avutil: Add timeline side data

[Derek Buitenhuis]

On 4/5/2018 8:14 PM, Rostislav Pehlivanov wrote:
> I think it makes sense to have it in AVStream rather than as side data.
> I don't have an opinion on whether codec switches should be indicated. It
> would be nice for them to be a separate segment if that's possible and
> reliable, since it would allow users to init all they would at startup. If
> not then they can just handle them as they come like a stream and reinit if
> they have to.

The consensus so far seems to be AVStream members, so I will switch to that
approach.

For codec changes, not all formats indicate codec changes up front, such as
MPEG-TS which we may be streaming, so I think it has to be handled as it comes
anyway.

> After all this API only concerns complete files rather than
> streams.

'Streaming' should actually be possible in the same sense you can stream a
progressive MP4 of Matroska file, since this data is located in the same place
as the index, which will be upfront (or at least, all in one place).

- Derek