On Mon, Dec 31, 2007 at 01:44:03PM +0100, Reinhard Nissl wrote: > Hi, > a) compile an optimized version of ffmpeg by running configure with > --arch and --cpu like mentioned here: > http://www.vdr-portal.de/board/thread.php?postid=680709#post680709
I wonder if that's really produce better code than -march=native -O2 with recent gcc, but I'll try :-) > b) try the revised patch which adds a further option to cheat decoding > for the sake of speed: > http://www.nabble.com/-PATCH--Provide-FFmpeg-options-skip_loop_filter-and%09choose_speed_over_accuracy-to14552289.html#a14552289 Strange I get one reject : *************** *** 357,362 **** this->context->flags |= CODEC_FLAG_EMU_EDGE; } pthread_mutex_lock(&ffmpeg_lock); if (avcodec_open (this->context, this->codec) < 0) { pthread_mutex_unlock(&ffmpeg_lock); --- 377,385 ---- this->context->flags |= CODEC_FLAG_EMU_EDGE; } + if (this->class->choose_speed_over_accuracy) + this->context->flags2 |= CODEC_FLAG2_FAST; + pthread_mutex_lock(&ffmpeg_lock); if (avcodec_open (this->context, this->codec) < 0) { pthread_mutex_unlock(&ffmpeg_lock); Which isn't a problem to hand edit :-) > c) try setting > > engine.buffers.audio_num_buffers:4 > engine.buffers.video_num_buffers:600 > > or even more for video_num_buffers e. g. 1500 > > d) choose a decoding thread count suitable for your machine like > mentioned in > > http://www.vdr-portal.de/board/thread.php?postid=682036#post682036 > > I'm not sure whether multithreaded decoding can be activated for HD > suisse. Maybe it is possible with the above patch for "choose speed over > accuracy". > > e) monitor the buffer usage output of --post vdr_video. The 3rd number > must not fall below 3. Otherwise your machine seems to be to slow. I think it works pretty good with HD Suisse : buffer usage: 1458, 0, 10, 0, 0xa40910 buffer usage: 1444, 0, 10, 0, 0xa40910 buffer usage: 1498, 0, 10, 0, 0xa40910 buffer usage: 1498, 0, 10, 0, 0xa40910 buffer usage: 1498, 0, 10, 0, 0xa40910 buffer usage: 1453, 0, 10, 0, 0xa40910 buffer usage: 1435, 0, 10, 0, 0xa40910 buffer usage: 1487, 0, 10, 0, 0xa40910 buffer usage: 1452, 0, 9, 0, 0xa40910 buffer usage: 1450, 0, 10, 0, 0xa40910 buffer usage: 1448, 0, 10, 0, 0xa40910 buffer usage: 1411, 0, 10, 0, 0xa40910 buffer usage: 1395, 0, 10, 0, 0xa40910 buffer usage: 1468, 0, 10, 0, 0xa40910 buffer usage: 1434, 0, 9, 0, 0xa40910 buffer usage: 1432, 0, 10, 0, 0xa40910 buffer usage: 1430, 0, 10, 0, 0xa40910 buffer usage: 1395, 0, 10, 0, 0xa40910 buffer usage: 1466, 0, 10, 0, 0xa40910 buffer usage: 1449, 0, 10, 0, 0xa40910 buffer usage: 1416, 0, 10, 0, 0xa40910 buffer usage: 1414, 0, 10, 0, 0xa40910 buffer usage: 1412, 0, 10, 0, 0xa40910 buffer usage: 1475, 0, 10, 0, 0xa40910 buffer usage: 1459, 0, 10, 0, 0xa40910 buffer usage: 1443, 0, 10, 0, 0xa40910 buffer usage: 1407, 0, 10, 0, 0xa40910 buffer usage: 1405, 0, 10, 0, 0xa40910 buffer usage: 1498, 0, 10, 0, 0xa40910 buffer usage: 1455, 0, 10, 0, 0xa40910 buffer usage: 1439, 0, 10, 0, 0xa40910 buffer usage: 1423, 0, 10, 0, 0xa40910 buffer usage: 1392, 0, 10, 0, 0xa40910 buffer usage: 1463, 0, 10, 0, 0xa40910 Thank you really really much !!! I am watching Suisse HD right now with only small artifacts from time to time, but only really few :-) In case someone is interested : I start xine with : xine -V xv -A alsa --no-logo --geometry +0+0 --post vdr_video --post vdr_audio -Dtvtime:method=Greedy2Frame,cheap_mode=0,pulldown=0,use_progressive_frame_flag=1 vdr:/var/vdr/xine/stream#demux:mpeg_pes processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping : 6 cpu MHz : 2394.000 cache size : 4096 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4804.77 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 the same as first one : it's a core duo 2 :-) And I use nvidia proprietary driver 169.07. -- Grégoire FAVRE http://gregoire.favre.googlepages.com http://www.gnupg.org http://picasaweb.google.com/Gregoire.Favre _______________________________________________ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
