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Hi!
I am trying to create videoplayer using SDL. I have decoded video stream with ffmpeg and I want to render decoded packages into SDLTexture.
All tutorials of how to do this are based on older version of SDL - 1.2. In SDL 2.0 SDL_Overlay is not present. Instead, as I have understood, we should use SDLTexture. I have read libSDL Wikia, tried to change my code to new version, but have no succes. Please, help me! Here is code for version 1.2




And here is my edited code, but nothing is working




THANKS!

I hope you are using SDL 2.0.1+ since it gives you an addictional function very helpful to avoid an unneeded data copy every frame, SDL_UpdateYUVTexture.


You don't need texture streaming access, and you can get rid of sws scale except if you want to apply particular effects to the texture


So, create your texture with:


SDL_Texture* bmp = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12,SDL_TEXTUREACCESS_STATIC codec_context->width, codec_context->height);




After:
  avcodec_decode_video2(codec_context, frame, &frame_finished, &packet);



  if (frame_finished)  {
 SDL_UpdateYUVTexture(bmp, NULL, frame->data[0], frame->linesize[0],
                frame->data[1], frame->linesize[1],
                frame->data[2], frame->linesize[2]);

   }




Then in a timely synchronized way you have to display it (assuming the window is the right size):


SDL_RenderCopy(renderer, bmp, NULL, NULL);
SDL_RenderPresent(renderer);



-- 
Bye,
 Gabry

Gabriele Greco, thank You very much!!!!

Hi
Check waave project


Sent from Yahoo! Mail on Android From: bukka.wh;
To: ;
Subject: [SDL] SDL 2.0 and ffmpeg. How to render texture in new version.
Sent: Wed, Jan 15, 2014 4:17:04 PM


Hi! I am trying to create videoplayer using SDL. I have decoded video stream with ffmpeg and I want to render decoded packages into SDLTexture. All tutorials of how to do this are based on older version of SDL - 1.2. In SDL 2.0 SDL_Overlay is not present. Instead, as I have understood, we should use SDLTexture. I have read libSDL Wikia, tried to change my code to new version, but have no succes. Please, help me! Here is code for version 1.2 Code: SDL_Overlay* bmp = SDL_CreateYUVOverlay(codec_context->width, codec_context->height, SDL_YV12_OVERLAY, screen); struct SwsContext* img_convert_context; img_convert_context = sws_getCachedContext(NULL, codec_context->width, codec_context->height, codec_context->pix_fmt, codec_context->width, codec_context->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); if (img_convert_context == NULL) { fprintf(stderr, "Cannot initialize the conversion context\n"); return -1; } AVFrame* frame = avcodec_alloc_frame(); AVPacket packet; while (av_read_frame(format_context, &packet) >= 0) { if (packet.stream_index == video_stream) { // Video stream packet int frame_finished; avcodec_decode_video2(codec_context, frame, &frame_finished, &packet); if (frame_finished) { SDL_LockYUVOverlay(bmp); // Convert frame to YV12 pixel format for display in SDL overlay AVPicture pict; pict.data[0] = bmp->pixels[0]; pict.data[1] = bmp->pixels[2]; // it's because YV12 pict.data[2] = bmp->pixels[1]; pict.linesize[0] = bmp->pitches[0]; pict.linesize[1] = bmp->pitches[2]; pict.linesize[2] = bmp->pitches[1]; sws_scale(img_convert_context, frame->data, frame->linesize, 0, codec_context->height, pict.data, pict.linesize); SDL_UnlockYUVOverlay(bmp); SDL_Rect rect; rect.x = 0; rect.y = 0; rect.w = codec_context->width; rect.h = codec_context->height; SDL_DisplayYUVOverlay(bmp, &rect); } } // Free the packet that was allocated by av_read_frame av_free_packet(&packet);
And here is my edited code, but nothing is working Code: // Create wndow SDL_Window *window = SDL_CreateWindow( "YUV speed test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, codec_context->width, codec_context->height, SDL_WINDOW_SHOWN|SDL_WINDOW_RESIZABLE); // Create renderer SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0); // Create texture SDL_Texture* bmp = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12,SDL_TEXTUREACCESS_STREAMING, codec_context->width, codec_context->height); // Create context fo pixel conver struct SwsContext* img_convert_context; img_convert_context = sws_getCachedContext( NULL, codec_context->width, codec_context->height, codec_context->pix_fmt, codec_context->width, codec_context->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); AVFrame* frame = avcodec_alloc_frame(); AVPacket packet; while (av_read_frame(format_context, &packet) >= 0) { if (packet.stream_index == video_stream) { // Video stream packet int frame_finished; avcodec_decode_video2(codec_context, frame, &frame_finished, &packet); if (frame_finished) { AVPicture pict; // Lock my texture SDL_LockTexture(bmp, NULL, pict.data, pict.linesize); sws_scale(img_convert_context, frame->data, frame->linesize, 0, codec_context->height, pict.data, pict.linesize); SDL_UnlockTexture(bmp); SDL_Rect rect; rect.x = 0; rect.y = 0; rect.w = codec_context->width; rect.h = codec_context->height; // Draw texture SDL_UpdateTexture(bmp,&rect,pict.data, pict.linesize); } } // Free the packet that was allocated by av_read_frame av_free_packet(&packet);
THANKS!

By waave project i mean
Waave.sourceforge.net
Sent from Yahoo! Mail on Android From: bukka.wh;
To: ;
Subject: [SDL] SDL 2.0 and ffmpeg. How to render texture in new version.
Sent: Wed, Jan 15, 2014 4:17:04 PM


Hi! I am trying to create videoplayer using SDL. I have decoded video stream with ffmpeg and I want to render decoded packages into SDLTexture. All tutorials of how to do this are based on older version of SDL - 1.2. In SDL 2.0 SDL_Overlay is not present. Instead, as I have understood, we should use SDLTexture. I have read libSDL Wikia, tried to change my code to new version, but have no succes. Please, help me! Here is code for version 1.2 Code: SDL_Overlay* bmp = SDL_CreateYUVOverlay(codec_context->width, codec_context->height, SDL_YV12_OVERLAY, screen); struct SwsContext* img_convert_context; img_convert_context = sws_getCachedContext(NULL, codec_context->width, codec_context->height, codec_context->pix_fmt, codec_context->width, codec_context->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); if (img_convert_context == NULL) { fprintf(stderr, "Cannot initialize the conversion context\n"); return -1; } AVFrame* frame = avcodec_alloc_frame(); AVPacket packet; while (av_read_frame(format_context, &packet) >= 0) { if (packet.stream_index == video_stream) { // Video stream packet int frame_finished; avcodec_decode_video2(codec_context, frame, &frame_finished, &packet); if (frame_finished) { SDL_LockYUVOverlay(bmp); // Convert frame to YV12 pixel format for display in SDL overlay AVPicture pict; pict.data[0] = bmp->pixels[0]; pict.data[1] = bmp->pixels[2]; // it's because YV12 pict.data[2] = bmp->pixels[1]; pict.linesize[0] = bmp->pitches[0]; pict.linesize[1] = bmp->pitches[2]; pict.linesize[2] = bmp->pitches[1]; sws_scale(img_convert_context, frame->data, frame->linesize, 0, codec_context->height, pict.data, pict.linesize); SDL_UnlockYUVOverlay(bmp); SDL_Rect rect; rect.x = 0; rect.y = 0; rect.w = codec_context->width; rect.h = codec_context->height; SDL_DisplayYUVOverlay(bmp, &rect); } } // Free the packet that was allocated by av_read_frame av_free_packet(&packet);
And here is my edited code, but nothing is working Code: // Create wndow SDL_Window *window = SDL_CreateWindow( "YUV speed test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, codec_context->width, codec_context->height, SDL_WINDOW_SHOWN|SDL_WINDOW_RESIZABLE); // Create renderer SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0); // Create texture SDL_Texture* bmp = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12,SDL_TEXTUREACCESS_STREAMING, codec_context->width, codec_context->height); // Create context fo pixel conver struct SwsContext* img_convert_context; img_convert_context = sws_getCachedContext( NULL, codec_context->width, codec_context->height, codec_context->pix_fmt, codec_context->width, codec_context->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); AVFrame* frame = avcodec_alloc_frame(); AVPacket packet; while (av_read_frame(format_context, &packet) >= 0) { if (packet.stream_index == video_stream) { // Video stream packet int frame_finished; avcodec_decode_video2(codec_context, frame, &frame_finished, &packet); if (frame_finished) { AVPicture pict; // Lock my texture SDL_LockTexture(bmp, NULL, pict.data, pict.linesize); sws_scale(img_convert_context, frame->data, frame->linesize, 0, codec_context->height, pict.data, pict.linesize); SDL_UnlockTexture(bmp); SDL_Rect rect; rect.x = 0; rect.y = 0; rect.w = codec_context->width; rect.h = codec_context->height; // Draw texture SDL_UpdateTexture(bmp,&rect,pict.data, pict.linesize); } } // Free the packet that was allocated by av_read_frame av_free_packet(&packet);
THANKS!

mehrdad_58, thanks!
So, I can launch it on Android? (I didn't found out how to build it on Android((((

When I am trying to use SDL_UpdateYUVTexture I got error:
error: undefined reference to 'SDL_UpdateYUVTexture'.


I am creating video player for Android, use SDL 2.0.1. I am working in Eclipse.

Hi bukka
Waave project is an implementation of video player by using ffmpeg and sdl
Have a look at following link:
Waave.sourceforge.net
Sent from Yahoo! Mail on Android From: bukka.wh;
To: ;
Subject: Re: [SDL] SDL 2.0 and ffmpeg. How to render texture in new version.
Sent: Sat, Jan 18, 2014 12:39:32 PM


When I am trying to use SDL_UpdateYUVTexture I got error: error: undefined reference to 'SDL_UpdateYUVTexture'. I am creating video player for Android, use SDL 2.0.1. I am working in Eclipse.