[FFmpeg-devel] [PATCH 2/4 v8] avformat/mov: add support for tile HEIF still images

[James Almer]

On 2/16/2024 9:50 AM, Anton Khirnov wrote:
> Quoting James Almer (2024-02-11 19:56:59)
>> +/**
>> + * The video stream is intended to be merged with another stream before
>> + * presentation.
>> + * Used for example to signal the stream contains a tile from a HEIF grid.
>> + */
>> +#define AV_DISPOSITION_TILE                 (1 << 21)
> 
> The notion of "this stream needs to be combined with another one for
> presentation" seems more general than just tiling video, could just as
> well describe a set of audio tracks to be mixed together.

That's why i stated it's for video. For audio there's 
AV_DISPOSITION_DEPENDENT.

> 
> And since we're running out of easily usable disposition bits, we
> shouldn't waste them. How about AV_DISPOSITION_SUBSTREAM?

Maybe we could redefine and reuse AV_DISPOSITION_DEPENDENT for this?