Announcement

Collapse
No announcement yet.

Which power must be a cpu for HD 1080p?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Which power must be a cpu for HD 1080p?

    I would like known, in the eventuality is impossible use driver open for a fluent display of video hd 1080p, which power must be a cpu for this task.

    Thanks.

  • #2
    Depends on the bitrate you want to decode and how good the codec can work multithreaded. mplayer default only uses 1 core, you would need the mt git branch. In general you should not buy cpus with less than 3 ghz dual (2.93 is also ok). A fast dual is certainly better than a lower clocked quad for simpler codecs.

    Comment


    • #3
      Thanks.

      What about a 17 Mbps as bitrate?

      Comment


      • #4
        A Phenom II can play BluRay rips without any problems, even on a single core. It runs into trouble with some really heavy stuff (like the infamous birds sequence). If you get a multi-core mplayer, most modern dual-core processors will be fine.

        Comment


        • #5
          Good.

          Thanks.

          Comment


          • #6
            My Athlon II 235e (2.7 Ghz dual) handles 15-18 mbps 1080p video just fine. If you can use multithreading, a 605e (2.3 Ghz quad) will play more or less any video out there.

            Comment


            • #7
              Good.

              I have two old amd processor so i can see only 720p video (while 1080p,even local on hdd aren't perfect), when i play some video (i'm using debian squeeze 64 bit) and I take a look at top I don't see difference in the use of the processors between mplayer-mt and mplayer.
              I have something as:
              85 % first core
              25 % second core
              Is it normal?

              Comment


              • #8
                No, it isn't. Usually there should be a core which is slightly more used than the others (the one that also runs Xorg, for example) and the other more ore less similar. So, in your case, 55% and 45% would seem reasonable. Have you tried using ffplay directly? Just a thought.

                Comment


                • #9
                  Also (can't edit) I'm not sure whether mplayer-mt will automatically use all your cores. Maybe you have to tell it explicity.

                  Comment


                  • #10
                    No it does not. My script has got some examples at the end:

                    http://kanotix.com/files/fix/mplayer...t-snapshot.txt

                    Comment


                    • #11
                      I don't find ffplay on my repository.

                      I use the commands:
                      $ mplayer 00040.MTS
                      $ mplayer -lavdopts threads=2 00040.MTS
                      $ mplayer-mt 00040.MTS
                      but the final result regarding the use of the cpu are always the same.

                      I use the packages available on Debian.

                      Note:
                      It's a free video at 17 mbps available fontana di sanremo (notte) 17mbps.
                      It's only a test video about an owner of a Sony HDR-CX550VE.
                      [Sony HDR-CX550VE e altre VCR] Video Sample e Opinioni

                      Comment


                      • #12
                        Using
                        mplayer-mt -lavdopts threads=2 00040.MTS
                        i obtain:
                        75 %
                        30 %
                        a little better then before.

                        Comment


                        • #13
                          git clone git://gitorious.org/~astrange/ffmpeg/ffmpeg-mt.git

                          Here you can download ffmpeg-mt, which contains ffplay (you will need to build it from source). Cpu usage is still strange, have you tried with other videos?

                          Comment


                          • #14
                            Ok, I've built especially for you ffmpeg-mt. On the systems I tried it works as expected (load balanced between the cores).
                            You can get it at http://www.mattea.info/ffmpeg/ffmpeg...21-1_amd64.deb
                            Everything is installed in /usr/local so it doesn't conflict with system packages. After installation, you should run "ldconfig" as root to detect the new libraries. To play a file, use ffplay -threads N filename.

                            Comment


                            • #15
                              Thanks for the deb.

                              Unfortunately the problem remain the same, also ffmpeg work worst respect mplayer and mplayer-mt.
                              During the start, the video don't run immediately (as happen instead using both versions of mplayer).
                              Also the video result a lot less fluent respect mplayer.

                              Comment

                              Working...
                              X