Re: [mythtv-users] XvMC in preview?
On Sat, 2005-05-14 at 18:24 -0500, Michael Carland wrote: Howdy. I'm running .18 with XvMC (EPIA), mpeg2 all the way through. When I watch live TV, cpu usage is about 15-20%, and all is well. Live TV in the EPG and prerecorded TV is the same. But when I am seeing a video preview under Watch Recordings, cpu is about 95%, and the preview is very skittery. I assume this is because the preview video is not using XvMC? MythTV uses software decoding for the preview. It used to be accelerated but a lot of users had problems because their drivers did not support scaling XVideo to such a small window. The scaling could be more efficient, we do color conversion then scale. We could do this in one pass, and we could deinterlace by just ignoring the even lines. Also, using accelerated playback could be made an option for the preview. No one has had the time and/or inclination to do this yet. If you want a stab at the code, here is where to look: programs/mythfrontend/playbackbox.cpp I recently put up the doxygen documentation for MythTV here: http://www.cuymedia.net/ It is still very much a work in progress, but if you want to learn about the code, one of the best ways is to document it :) -- Daniel ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] XvMC in preview?
On May 14, 2005, at 7:22 PM, Örn Einar Hansen wrote: Þann Sunnudagur 15 maí 2005 01:24 skrifaði Michael Carland: Howdy. I'm running .18 with XvMC (EPIA), mpeg2 all the way through. When I watch live TV, cpu usage is about 15-20%, and all is well. Live TV in the EPG and prerecorded TV is the same. But when I am seeing a video preview under Watch Recordings, cpu is about 95%, and the preview is very skittery. I assume this is because the preview video is not using XvMC? Is this true? Is there another solution? If it is true, is there a technical reason the preview doesn't use XvMC, or has it just not been done yet, and is something I could look into fixing? Did you remember to modify the mplayer playback command, to include '-vo xvmc -vc ffmpeg12mc ? I may be misunderstanding what you are suggesting, but I think you are referring to MythVideo video playback, which is working fine for me. I am talking about the small preview window of the recorded programs. Even here, the actual playback is fine, it is only the preview that chews through cpu and looks poor. Media Library-Watch Recordings. Turning on CPU friendly preview of recordings helps, as it then only uses 60% cpu. But since all other display of video only uses 20%, and this is the only display that has tearing and uses 95% (or 60%) cpu, I'm thinking the preview is not using XvMC like the others. -Michael ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] XvMC in preview?
--- Michael Carland [EMAIL PROTECTED] wrote: On May 14, 2005, at 7:22 PM, Örn Einar Hansen wrote: Þann Sunnudagur 15 maí 2005 01:24 skrifaði Michael Carland: Howdy. I'm running .18 with XvMC (EPIA), mpeg2 all the way through. When I watch live TV, cpu usage is about 15-20%, and all is well. Live TV in the EPG and prerecorded TV is the same. But when I am seeing a video preview under Watch Recordings, cpu is about 95%, and the preview is very skittery. I assume this is because the preview video is not using XvMC? Is this true? Is there another solution? If it is true, is there a technical reason the preview doesn't use XvMC, or has it just not been done yet, and is something I could look into fixing? Did you remember to modify the mplayer playback command, to include '-vo xvmc -vc ffmpeg12mc ? I may be misunderstanding what you are suggesting, but I think you are referring to MythVideo video playback, which is working fine for me. I am talking about the small preview window of the recorded programs. Even here, the actual playback is fine, it is only the preview that chews through cpu and looks poor. Media Library-Watch Recordings. Turning on CPU friendly preview of recordings helps, as it then only uses 60% cpu. But since all other display of video only uses 20%, and this is the only display that has tearing and uses 95% (or 60%) cpu, I'm thinking the preview is not using XvMC like the others. -Michael I'm not one of the dev guys, just a (l)user but it seems to me that what you are describing is perfectly natural. The main screen is displaying the recorded OSD and generating a preview which it has to scale down to fit in a small size, the CPU load is more because it is doing more things at the same time. Howard ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] XvMC in preview?
On May 14, 2005, at 7:57 PM, Howard Cokl wrote: --- Michael Carland [EMAIL PROTECTED] wrote: I may be misunderstanding what you are suggesting, but I think you are referring to MythVideo video playback, which is working fine for me. I am talking about the small preview window of the recorded programs. Even here, the actual playback is fine, it is only the preview that chews through cpu and looks poor. Media Library-Watch Recordings. Turning on CPU friendly preview of recordings helps, as it then only uses 60% cpu. But since all other display of video only uses 20%, and this is the only display that has tearing and uses 95% (or 60%) cpu, I'm thinking the preview is not using XvMC like the others. -Michael I'm not one of the dev guys, just a (l)user but it seems to me that what you are describing is perfectly natural. The main screen is displaying the recorded OSD and generating a preview which it has to scale down to fit in a small size, the CPU load is more because it is doing more things at the same time. Howard I would have thought the same thing, except that the live TV in the EPG is scaled and inserted into an OSD, and that uses the same 20% cpu for me. So I would assume that displaying an mpeg2 preview on an OSD would be no different. But looking at the code, I got lost, and realized that it would take me a lot of studying to get up to speed. So if I was doing something stupid causing it not to work, or if it can't work for some technical reason, I'd find some simpler thing to try and tweak first, that had a lower learning curve. -Michael ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] XvMC in preview?
On 14-May-05, at 7:24 PM, Michael Carland wrote: But when I am seeing a video preview under Watch Recordings, cpu is about 95%, and the preview is very skittery. I assume this is because the preview video is not using XvMC? That's right. This came up a while ago and there was a reason why the preview doesn't use XvMC but I don't remember it. A quick search of the dev and users archives didn't turn up anything either but for sure it was discussed within the last six months. - George ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
