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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Hello, I have integrated FFMPEG to decode H264 videos streams. It works. Now, I’m trying to use AVHWAccel to decode H264 videos streaming.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>I compile FFMPEG 1.1.1 with --enable-dxva2 --enable-decoder=h264_dxva2 --enable-hwaccel=h264_dxva2.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>When I initialise my CodecContext, I use the method below to find the AVHWAccel<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:blue'>if</span><span style='font-size:10.0pt;font-family:"Courier New"'>(h264_dxva2_hwaccel == NULL)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> { AVHWAccel* hwaccel = NULL;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>while</span>(hwaccel = av_hwaccel_next(hwaccel))<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> { <span style='color:blue'>if</span>((hwaccel->pix_fmt == AV_PIX_FMT_DXVA2_VLD) && (hwaccel->id == CODEC_ID_H264))<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> { h264_dxva2_hwaccel = hwaccel;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> av_register_hwaccel(h264_dxva2_hwaccel);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> printf(<span style='color:red'>"dxva2_hwaccel = %s\r\n"</span>,h264_dxva2_hwaccel->name);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> <span style='color:blue'>break</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'>And so affect it to my CodecContext<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New";color:blue'>if</span><span style='font-size:10.0pt;font-family:"Courier New"'> (h264_dxva2_hwaccel != NULL)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Courier New"'> { m_lpCodecCtx->hwaccel = h264_dxva2_hwaccel;<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>But it seems I have to set the m_lpCodecCtx->hwaccel_context and I don’t find any documentations on this part.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>And also, after this, I just have to have the same code than before (using avcodec_decode_video2 and other ffmpeg functions), or the hardware decoding is really different ?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>If someone can explain me (or better have a simple sample to do this),<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Regards,<o:p></o:p></span></p></div></body></html>