https://community.intel.com/t5/Intel-Integrated-Performance/bitrate-control-mpeg4-encoder/m-p/942791#M17825 Hi,<BR /><BR />With respect to the video_enc_con example application in<BR />the media sample distribution:<BR />The bitrate setting in the mp4.par example file does not<BR />seem to have any effect, or hardly. Whereas it does have<BR />effect in the MPEG2 case. It looks like nothing regarding<BR />bitrate control is implemented in the mpeg4 case, is that<BR />correct or am I overlooking something?<BR /><BR />Thanks in advance for the information.<BR /><BR />Regards.<BR />Hendrik<BR /><BR />FYI: here is the mp4.par file I use. I only change the bitrate<BR />in this example but with minimal effects.<BR />!! MPEG-4 videoencoder sample !!<BR />test.yuv // name of source files<BR />352 // horizontal_size<BR />288 // vertical_size<BR />100 // number of frames<BR />25 // frame scale<BR />1 // frame interval<BR />1 // quant_type: 0 - H263, 1 - the first quantization method<BR />6 // IVOP quant<BR />6 // PVOP quant<BR />6 // BVOP quant<BR />- // name of intra quant matrix file ("-": default matrix)<BR />- // name of non intra quant matrix file ("-": default matrix)<BR />0 // short_video_header<BR />100 // max I-VOP distance<BR />0 // num of successive B-VOPs<BR />15 // P-VOP searchWidth in full pel<BR />15 // P-VOP searchHeight in full pel<BR />15 // B-VOP searchWidth Forw in full pel<BR />15 // B-VOP searchHeight Forw in full pel<BR />15 // B-VOP searchWidth Back in full pel<BR />15 // B-VOP searchHeight Back in full pel<BR />1 // Motion Estimation algorithm: 0 - full search, 1 - fast search<BR />2 // Motion Estimation accuracy: 1 - full pel, 2 - half pel, 4 - quarter pel<BR />0 // 0 - 1MV 1 - 4MV<BR />1 // obmc_disable<BR />1 // Rounding Control enable<BR />0 // calculate PSNR<BR />1 // RateControl 0 - no, 1 - FrameLavel(VBR), 2 - MacroblockLevel (CBR)<BR />1320000 // BitRate, bps<BR />50 // SceneChangeThreshold, %<BR />0 // insert GOV before I-frames<BR />0 // repeat VOL before I-frames<BR />0 // insert GOB/VideoPackets<BR />1024 // VideoPacket length, bit<BR />0 // data_partitioned<BR />0 // reversible_vlc<BR />0 // interlaced<BR />0 // top_field_first<BR />0 // alternate_vertical_scan_flag<BR />1 // ME pred - 0 - field; 1 - frame; 2 - field+frame<BR />0 // sprites - 0 - none, 1 - basic, 2 - GMC<BR />0 // no_of_sprite_warping_points<BR />0 // sprite_warping_accuracy<P>Message Edited by klend on <SPAN class="date_text">03-03-2006</SPAN> <SPAN class="time_text">02:22 PM</SPAN></P> Fri, 03 Mar 2006 20:55:38 GMT klend 2006-03-03T20:55:38Z https://community.intel.com/t5/Intel-Integrated-Performance/bitrate-control-mpeg4-encoder/m-p/942791#M17825 Hi,<BR /><BR />With respect to the video_enc_con example application in<BR />the media sample distribution:<BR />The bitrate setting in the mp4.par example file does not<BR />seem to have any effect, or hardly. Whereas it does have<BR />effect in the MPEG2 case. It looks like nothing regarding<BR />bitrate control is implemented in the mpeg4 case, is that<BR />correct or am I overlooking something?<BR /><BR />Thanks in advance for the information.<BR /><BR />Regards.<BR />Hendrik<BR /><BR />FYI: here is the mp4.par file I use. I only change the bitrate<BR />in this example but with minimal effects.<BR />!! MPEG-4 videoencoder sample !!<BR />test.yuv // name of source files<BR />352 // horizontal_size<BR />288 // vertical_size<BR />100 // number of frames<BR />25 // frame scale<BR />1 // frame interval<BR />1 // quant_type: 0 - H263, 1 - the first quantization method<BR />6 // IVOP quant<BR />6 // PVOP quant<BR />6 // BVOP quant<BR />- // name of intra quant matrix file ("-": default matrix)<BR />- // name of non intra quant matrix file ("-": default matrix)<BR />0 // short_video_header<BR />100 // max I-VOP distance<BR />0 // num of successive B-VOPs<BR />15 // P-VOP searchWidth in full pel<BR />15 // P-VOP searchHeight in full pel<BR />15 // B-VOP searchWidth Forw in full pel<BR />15 // B-VOP searchHeight Forw in full pel<BR />15 // B-VOP searchWidth Back in full pel<BR />15 // B-VOP searchHeight Back in full pel<BR />1 // Motion Estimation algorithm: 0 - full search, 1 - fast search<BR />2 // Motion Estimation accuracy: 1 - full pel, 2 - half pel, 4 - quarter pel<BR />0 // 0 - 1MV 1 - 4MV<BR />1 // obmc_disable<BR />1 // Rounding Control enable<BR />0 // calculate PSNR<BR />1 // RateControl 0 - no, 1 - FrameLavel(VBR), 2 - MacroblockLevel (CBR)<BR />1320000 // BitRate, bps<BR />50 // SceneChangeThreshold, %<BR />0 // insert GOV before I-frames<BR />0 // repeat VOL before I-frames<BR />0 // insert GOB/VideoPackets<BR />1024 // VideoPacket length, bit<BR />0 // data_partitioned<BR />0 // reversible_vlc<BR />0 // interlaced<BR />0 // top_field_first<BR />0 // alternate_vertical_scan_flag<BR />1 // ME pred - 0 - field; 1 - frame; 2 - field+frame<BR />0 // sprites - 0 - none, 1 - basic, 2 - GMC<BR />0 // no_of_sprite_warping_points<BR />0 // sprite_warping_accuracy<P>Message Edited by klend on <SPAN class="date_text">03-03-2006</SPAN> <SPAN class="time_text">02:22 PM</SPAN></P> Fri, 03 Mar 2006 20:55:38 GMT https://community.intel.com/t5/Intel-Integrated-Performance/bitrate-control-mpeg4-encoder/m-p/942791#M17825 klend 2006-03-03T20:55:38Z