工具
1.ffmpeg-4.2-win32
2.VS2019
3.gpu
代码
m_pCodec = avcodec_find_decoder_by_name("h264_qsv");
/*****************解码器********************/
if (m_pCodec == NULL)
{
printf("Codec not found.\n");
return -1;
}
m_pCodecCtx = avcodec_alloc_context3(m_pCodec);
if (!m_pCodecCtx)
{
printf("CodecCtx not found.\n");
return -1;
}
if (avcodec_open2(m_pCodecCtx, m_pCodec, NULL) < 0)
{
printf("Could not open codec.\n");
return -1;
}
if (!m_pFrame)
{
m_pFrame = av_frame_alloc();
}
if (!m_pFrameYUV)
{
m_pFrameYUV = av_frame_alloc();
}
av_init_packet(&m_packet);
//
m_packet.data = 接受的数据
m_packet.size = 接受数据大小
int got_picture = 0;
int ret = avcodec_decode_video2(m_pCodecCtx, m_pFrame, &got_picture, &m_packet);
if (ret < 0)
{
m_mutex.unlock();
return;
}
if (got_picture)
{
sws_scale(m_img_convert_ctx, (const unsigned char* const*)m_pFrame->data, m_pFrame->linesize, 0, m_pCodecCtx->height,
m_pFrameYUV->data, m_pFrameYUV->linesize);
//SDL---------------------------
SDL_UpdateTexture(m_sdlTexture, NULL, m_pFrameYUV->data[0], m_pFrameYUV->linesize[0]);
SDL_RenderClear(m_sdlRenderer);
SDL_RenderCopy(m_sdlRenderer, m_sdlTexture, NULL, NULL);
SDL_RenderPresent(m_sdlRenderer);
//SDL End-----------------------
}
if (m_packet.data)
{
m_packet.size -= ret;
m_packet.data += ret;
}
效果截图
1.未开启前
2.开启