Great! Thanks, turning on DMA did the trick for my dvd playback. Did you use /etc/hdparm.conf to add that to system startup?

So what is pineapple? (other than a tasty fruit!)

No I didn't I'm only a Noob! I tried looking in fstab, I knew their was some where else. Slowly Learning and loving every minute of it.



Sorry the word got filtered! libcss'badword' I hope you get what I mean!

_________________
Thanks
Sam Taylor
Radio Rocks with LWRadio - No False Crap

ryanpatterson:

I still have not had a chance to try mplayer instead of xine yet. Do you know what program MythTV uses to play back ISOs? See below for the reason I am asking this question...

nitrouk:

hdparm returns the following for the DVD drive:

/dev/dvd:
HDIO_GET_MULTCOUNT failed: Function not implemented
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
HDIO_GETGEO failed: Inappropriate ioctl for device

If I understand correctly, this means DMA is enabled.

mad_paddler:

I did as you suggested. I ripped the DVD to an ISO file on a WinXP machine and scp'ed it over to my MythTV machine. The ISO played back, but showed the same problem: no dropped frames, but weird little trails when there is fast movement. This seems to suggest that the problem is not with the DVD drive, but with the video stream itself.

Here is something else I just noticed:

This problem does not seem to happen with all DVDs. I just rented a movie and it played just fine. Is it possible that some DVDs are encoded differently (higher frame rate or something)?

I was curious how you all have made the DMA on by default? xine-check tells me DMA is not enabled. Not sure about the hard drive, but the following commands fix the problem, but I have to re-run after a reboot.

hdparm -qd1 /dev/hdc
hdparm -qd1 /dev/had

Added the following lines to /etc/hdparm.conf, but there is no change

/dev/hda {
dma = on
}

/dev/hdc {
dma = on
}

Thoughts

You can always add those commands to /etc/init.d/bootmisc.sh if nothing else works.

Gotcha pineapple was installed

See the bootmisc.sh note above for a quick and easy way to have hparm run at boot. I was wondering if you'd figured out how to use the new hdparm.conf. We'll both have to tinker with, and I'm going to try adding entries to /etc/hdparm.conf and then adding the hpdarm init scripts with "update-rc.d hdparm defaults"

I don't have time to play with it right now, so let us know if that works for you.

My DVD drive also did not have DMA active. Thanks for pointing this out.

Dwaine

The KnoppMythWiki page on xine discusses hdparm settings (which could possibly be the problem) as well as various xine deinterlacing settings (which sounds much more likely to be the problem, since it's mainly seen during horizontal motion). Some of the initial discussion on installing xine is out of date since KnoppMyth now comes with it, but the rest of the info should still be valid:

http://www.knoppmythwiki.org/index.php? ... neDVDHowTo

EDIT: I only now noticed that the original poster was using a 350's video out. That's a whole other kettle of fish, and the problem then becomes making sure that xine is (a) NOT deinterlacing the DVD video, and (b) xine is passing through the interlaced video untouched to the 350's MPEG2 decoder.

I believe that MythTV knows how to send MPEG2 files to the 350 untouched, so playback is smooth. I am not sure that other parts of MythTV (mplayer, etc.) can do that, or how they can be made to do so.

There was a trunk of mplayer that could use the decoding hardware of the prv-350 but it wasn't 100% functional. I have used my pvr-350 to play .avi's, .mpg's, dvd's, etc no problem. It does overscan the video a lot though. So many subtitles are lost.

Try



And it should read and use /etc/hdparm.conf on each boot.

Cheers,
Jim.

For the record I had the same problem with dvds skipping very slightly a few times a second, and enabling dma on the dvd drive fixed it. I tried jgm's command and it didn't work for me, but my hdparm.conf might have been setup incorrectly. Adding the hdparm command to the end of bootmisc.sh worked though. Is this considered a bug with R5E50 or is there a reason it was off (on some people's computers at least) by default?

As I understand it, you must restart hdparm from a command line before your edits of the hdparm.conf file will take effect:

You should then see a response back showing that the commands were sent to your target drive.

If you'd like to have these settings applied every time the computer boots, type the following


These bits came from this wiki article:
http://knoppmythwiki.org/index.php?page ... Management

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KnoppMyth R5.5, Asus A8N-VM CSM (nvidia 6150 onboard video), AMD Athlon 64 dual-core 4200+, two 1GB sticks DDR 400, HD-3000 HDTV card, PVR-150 card, Iguanaworks RS-232 IR receiver/transmitter, Pioneer DVR-110 DVD burner

Does installing pineapple mean that you've done a apt-get for it and the apt install thing, and then it should just work, or is there some configuration that must be done for xine to see the pineapples?

(sorry, but big linux noob here)

There is no additional setup.

this is missing a '/'

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