Hi, In order to get a better sense of what CPUs are needed to decode more demanding HDTV content (h264 1080p specifically), I'm wondering if I could trouble some freevo users to run a quick benchmark for me. I am especially keen on hearing results from those running Core 2 Duos and AMD X2s. If you have an older CPU, don't bother. :)
This isn't intended to be a thorough or scientific benchmark by any means; I'm just wanting to get an idea of what CPUs I ought to be recommending as a base minimum to handle reasonably demanding HDTV content. So, please fetch http://images.apple.com/movies/us/hd_gallery/gl1800/1080p/cornell_m1080p.mov and using a recent version of MPlayer (preferably a recent svn checkout), run: time mplayer cornell_m1080p.mov -nosound -vo null -benchmark -lavdopts fast:skiploopfilter=nonref Please take the average of three runs and, of course, make sure nothing else substantial is vying for CPU time. Also, run the video itself and watch it: mplayer -fs cornell_m1080p.mov -lavdopts fast:skiploopfilter=nonref Watch for any frame dropping, which can be noticed in the second last number of the status line mplayer outputs, e.g.: A: 6.1 V: 4.9 A-V: 1.142 ct: 0.023 148/148 95% 8% 3.6% 53 0 ^^^^ indicates 53 dropped frames so far Watch if mplayer outputs "Your system is too SLOW to play this!" Even if there is frame dropping as indicated on the status line, observe the overall cadence and a/v sync of the video and decide if, subjectively, it's watchable despite the occasional dropped frames. (A/V sync might be, admittedly, hard to determine with this particular video, but it's worth noting that the music is timed to certain scene changes.) Please report back the following: 1. Output of /proc/cpuinfo 2. Output of uname -r 3. The motherboard you're using, if you happen to know it 4. Version of mplayer used 5. The average time of the three -benchmark runs. 6. Whether or not you experienced frame dropping or mplayer complained about your system being too slow to play back the video in realtime 7. What video card and drivers you're using, and x.org version (relevant in #6 above, but not #5). 8. Any other useful observations with this and other HD material you happen to have tested. Again, I'm not trying to be precise here. I just want to get a better sense of the processor requirements for high resolution h264 content, particularly for AMD X2 processors (since I have the least experience with those). In particular I realize that libavcodec's h264 decoder is presently only single threaded, and I realize there are other decoding options out there (CoreAVC). Thanks, Jason. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Freevo-users mailing list Freevo-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freevo-users
