[FFmpeg-devel] [PATCH v2] Option to prevent probing for HTTP seekability

[Reimar Döffinger]

On Wed, Sep 26, 2012 at 07:56:19PM +0100, Duncan Salerno wrote:
> Some HLS servers return 403 when the Range header is present. Add an option to HTTP to control sending the range header (default on). HLS sets this option to disabled.
> 
> Updated with feedback from Clément Bœsch. I'd prefer not to overload the meaning of is_streamed as I think its less clear whats going on.

IMHO your approach has two disadvantages
1) It only works with HTTP
2) It doesn't work to do the opposite thing (forcing seeking enabled
without probing).

If API is/was not an issue, my suggestion would be to make
the default of AVIOContext.seekablea new AVIO_SEEKABLE_PROBE by not
setting probe you could force it to a specific value.
I suspect this would be possible with keeping API compatibility by
setting it like that in the avio_alloc_context function.
I guess there's still going to be a few more open questions like how
to get it on into the URLContext after that though.