[FFmpeg-devel] [FFmpeg-cvslog] Merge commit '2758cdedfb7ac61f8b5e4861f99218b6fd43491d'

[Thierry Foucu]

On Wed, May 4, 2016 at 3:46 PM, Thierry Foucu <tfoucu at gmail.com> wrote:

>
>
> On Wed, May 4, 2016 at 1:58 PM, Derek Buitenhuis <
> derek.buitenhuis at gmail.com> wrote:
>
>> On 5/4/2016 9:52 PM, wm4 wrote:
>> > This was never allowed and was never public API. Use custom I/O instead
>> > (creating an avio context with your own read/write callbacks).
>>
>>
> Can i ask why it cannot be part of the public API?
> It was really practical just to register new prefix, specially, when you
> have to create X number of them.
> I think this should be a feature. We allow to register filter, codec,
> muxer/demuxer, why not URL
>
>
>
>> Yes, I was thinking something akin to:
>>
>> int my_open(...)
>> {
>>     if (filename_has_prefix("myownproto://")) {
>>         ctx->opaque = myOwnContext;
>>         return my_own_open(...);
>>     }
>>     return avio_open(...);
>> }
>>
>> int my_read(...)
>> {
>>     if (ctx->opaque != NULL)
>>         return my_own_code(...);
>>
>>     return avio_read(...);
>> }
>>
>> Maybe this should be documented somewhere concretely as a Way To Do
>> Things.
>>
>
> Do you have an example how to do it? How to register my_open, my_read,
> my_seek ?
>
>

here is why I think it is nice to be able to register your own protocol:
You can create a new binary, using ffmpeg.c as main core, but register your
own protocol, so, you have the same command line as ffmpeg, but with your
protocol in it

For example, i can have something like this:

#include "myprotocol.h"
#define main ffmpeg_main
#include "libavformat/url.h"
#include "ffmpeg.c"
#undef main

int main(int argc, char **argv) {
  ffurl_register_protocol(&protocol_1);
  ffurl_register_protocol(&protocol_2);

  return ffmpeg_main(argc, argv);
}


With this binary, i will have the same command line as ffmpeg, but will
also support any protocol i want.

How can we do that without this function?


>> - Derek
>> _______________________________________________
>> ffmpeg-devel mailing list
>> ffmpeg-devel at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>>
>
>