[SDL] SDl 2.0 and ffmpeg

[David martin]

Thanks for the link.
I'm reading a video streaming (not a single BMp image) so not sure how 
this applies to my code.
ffmpeg reads in in yuvp42 format (see output from ffmpeg dump_format)

 > ~/workspace/test1/Release $ ./test2 toto.mpeg
Input #0, mpeg, from 'toto.mpeg':
   Duration: 00:00:04.83, start: 1.000000, bitrate: 606 kb/s
     Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 352x288 [SAR 
178:163 DAR 1958:1467], 104857 kb/s, 60 fps, 60 tbr, 90k tbn, 60 tbc


So the question is do i need to create a surface from each image read 
frame ? How would you do that ?

thanks,


On 03/09/2012 11:27 AM, Dimitris Zenios wrote:
> Have a look at this.
> http://slouken.blogspot.com/2011/02/mpeg-acceleration-with-glsl.html
>
> It might help you
>
> Zenios
>
> On Fri, Mar 9, 2012 at 12:09 PM, David martin<vilanew at gmail.com>  wrote:
>> Hi,
>> I'm new to SDL2, I used to play with danger ffmpeg tutorials to stream video
>> to an SDL surface.
>>
>> I'm updating my program incorporating SDL2.
>>
>>
>> Here is a piece of snippet and would appreciate your help to actually draw
>> the video image into the surface using the SDL2 api.
>> thanks
>>
>>
>>
>> ....
>>     AVFrame* frame ;
>>     AVPacket avpacket;
>>     int frame_finished;
>>     SDL_Event event;
>>     int w = 640;
>>     int h = 480;
>>     int done = 0, color = 0;
>>     SDL_Window * window = SDL_CreateWindow("SDL", SDL_WINDOWPOS_UNDEFINED,
>> SDL_WINDOWPOS_UNDEFINED, w, h, 0);
>>     SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, 0);
>>     SDL_Log("+++++ INIT DONE +++++");
>>
>>     frame = avcodec_alloc_frame();
>>
>>                 while (av_read_frame(format_context,&avpacket)>= 0) {
>>                         if (avpacket.stream_index == videostream) {
>>


>>                                 avcodec_decode_video2(codec_context, frame,
>> &frame_finished,&avpacket);
>>
>>
>>
>>                         }
>>
>>
>>
>>     while (!done) {
>>         SDL_WaitEvent(&event);
>>
>>          switch(event.type) {
>>                         //case FF_ALLOC_EVENT:
>>                      //alloc_picture(event.user.data1);
>>                  //    break;
>>                  //case FF_REFRESH_EVENT:
>>                      //video_refresh_timer(event.user.data1);
>>                    //  break;
>>            case SDL_KEYDOWN:
>>            case SDL_KEYUP:
>>            //case SDL_MOUSEBUTTONDOWN:
>>            case SDL_QUIT:
>>                 done=1;
>>             SDL_Log("Unhandled event type=%d", event.type);
>>
>>         }
>>
>>         //Draw Image into renderer.
>>         //We used to do it through SDL_DisplayYUVOverlay. How to do that with
>> SDL2.0.        Any help for this part ?
>>
>>         SDL_RenderClear(renderer);
>>         SDL_RenderPresent(renderer);
>>         SDL_Delay(20);
>>     }
>>
>>      }//while av_read_frame
>>
>>     SDL_Log("+++++ FINISHED +++++");
>>     SDL_Quit();
>> }
>>
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