[Libav-user] Does the image2 demuxer work with a custom AVIOContext?

[Hendrik Leppkes]

On Sun, Jan 12, 2014 at 8:02 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Hendrik Leppkes <h.leppkes at ...> writes:
>
>> image2 requires to directly access the files itself.
>
> Thank you for correcting me!
>
>> There is also a image2pipe, which can read the data from a avio
>> context, but in my experience it also didn't work properly because its
>> designed for a "pipe" scenario where it doesn't know the file size,
>> and therefor reads kinda blindly.
>
> Could you elaborate a little on the shortcomings of image2pipe?
> I seem to remember that it is used often.
> Or do you just mean that too many parsers are missing?

Yeah it only works on img formats which have a parser to re-assemble
full images, so its use is a bit limited.
On the other hand, you can actually use it to pipe several images in
one command into it (if you have a parser), so both use-cases can be
useful i suppose.

- Hendrik