Mailing List Archive: MythTV: Users

Xine Dropping Frames over 100Mbit NFS Mount

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mache at creeger

Mar 8, 2008, 9:23 AM

Post #1 of 5 (518 views)
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Xine Dropping Frames over 100Mbit NFS Mount

I have a MBE (AMD 2200 XP+ (1.8GHz), 1GB memory) running Fedora 7,
2.6.23.15-80.fc7, a SBE (VIA M10K (1Ghz), 1GB memory) running Fedora
7, 2.6.23.15-80.fc7, and a FE (AMD Athlon 64 X2 4600+ (2.4Ghz), 2GB
memory) running Fedora 8 latest 64-bit kernel. I view SD movies with
xine by playing isos over 100Mbit ethernet NFS mounts. xine was
chosen because it works best for viewing DVDs on the slowest machine
- the SBE.

Using my remote (ATI Remote Wonder) over lirc on the SBE or FE to
either jump forward or back in a DVD often results in an error
message stating that I have dropped frames. The message takes up the
entire screen and is waiting for me to use the mouse to click OK.
This only happens when I jump forward or back and not in any other
command. Since my SBE and FE do not have a keyboard or mouse and only
have the remote, I have to go to another computer and use VNC to
reset it. Its a major pain.

My xine configuration in myth is only for viewing isos and is:

xine -pfhq --no-splash -D dvd:/%s

I have looked at the xine docs and there does not seem to be a way to
change its latency expectations from the video stream or suppress the
error message. There also does not seem to be any way to decrease the
latency of the NFS response over the network.

Any ideas on how to resolve this short of spending the money to
upgrade to gigabit ethernet?

-- Mache

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freak4uxxx at gmail

Mar 15, 2008, 5:13 AM

Post #2 of 5 (451 views)
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Re: Xine Dropping Frames over 100Mbit NFS Mount [In reply to]

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Mache Creeger wrote:
> Using my remote (ATI Remote Wonder) over lirc on the SBE or FE to
> either jump forward or back in a DVD often results in an error
> message stating that I have dropped frames. The message takes up the
> entire screen and is waiting for me to use the mouse to click OK.
> This only happens when I jump forward or back and not in any other
> command. Since my SBE and FE do not have a keyboard or mouse and only
> have the remote, I have to go to another computer and use VNC to
> reset it. Its a major pain.
>
> My xine configuration in myth is only for viewing isos and is:
>
> xine -pfhq --no-splash -D dvd:/%s
>
> I have looked at the xine docs and there does not seem to be a way to
> change its latency expectations from the video stream or suppress the
> error message. There also does not seem to be any way to decrease the
> latency of the NFS response over the network.

While I don't know any fixes for xine, I *do* know that changing NFS
from udp to tcp helped me *a lot* with latency. Make sure it's enabled
in your kernels, and add the tcp option to fstab. Do some tests and see
how it works. It's been a while since I did it but I had huge changes
especially on large file copies / moves.
> Any ideas on how to resolve this short of spending the money to
> upgrade to gigabit ethernet?
Failing the above mentioned idea, I'm out of ideas. But let me know how
you make out.

> -- Mache
HTH
Eric
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digitalaudiorock at gmail

Mar 15, 2008, 7:18 AM

Post #3 of 5 (450 views)
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Re: Xine Dropping Frames over 100Mbit NFS Mount [In reply to]

On Sat, Mar 8, 2008 at 1:23 PM, Mache Creeger <mache[at]creeger.com> wrote:
> I have a MBE (AMD 2200 XP+ (1.8GHz), 1GB memory) running Fedora 7,
> 2.6.23.15-80.fc7, a SBE (VIA M10K (1Ghz), 1GB memory) running Fedora
> 7, 2.6.23.15-80.fc7, and a FE (AMD Athlon 64 X2 4600+ (2.4Ghz), 2GB
> memory) running Fedora 8 latest 64-bit kernel. I view SD movies with
> xine by playing isos over 100Mbit ethernet NFS mounts. xine was
> chosen because it works best for viewing DVDs on the slowest machine
> - the SBE.
>
> Using my remote (ATI Remote Wonder) over lirc on the SBE or FE to
> either jump forward or back in a DVD often results in an error
> message stating that I have dropped frames. The message takes up the
> entire screen and is waiting for me to use the mouse to click OK.
> This only happens when I jump forward or back and not in any other
> command. Since my SBE and FE do not have a keyboard or mouse and only
> have the remote, I have to go to another computer and use VNC to
> reset it. Its a major pain.

On rare occasions I get that, but only when jumping forward and back
rather quickly. I've gotten it in xvid avi files as well. I've even
gotten it when playing on a local file system as a matter of fact...so
I think it's just something xine doesn't handle well with jumping
forward and back. You can add this to the ~/.xine/config file:

gui.dropped_frames_warning:0

That prompt you're getting actually has a checkbox for not showing the
warning again, which would automatically set that for you, but it may
off the screen when you're getting it.

My big gripe about jumping in xine is that it doesn't seem to be
capable of jumping back from one dvd chapter to a previous
one...really annoying.

Tom
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mache at creeger

Mar 15, 2008, 8:09 PM

Post #4 of 5 (442 views)
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Re: Xine Dropping Frames over 100Mbit NFS Mount [In reply to]

Looking at the NFS documentation, it says that the NFS default is
TCP. Don't you mean change from the default of TCP to UDP?

-- Mache

At 05:13 AM 3/15/2008, Eric Martin wrote:
>While I don't know any fixes for xine, I *do* know that changing NFS
>from udp to tcp helped me *a lot* with latency. Make sure it's
>enabled in your kernels, and add the tcp option to fstab. Do some
>tests and see how it works. It's been a while since I did it but I
>had huge changes especially on large file copies / moves.
>
>At 10:23 AM 3/8/2008, Mache Creeger wrote:
>>Any ideas on how to resolve this short of spending the money to
>>upgrade to gigabit ethernet?
>
>Failing the above mentioned idea, I'm out of ideas. But let me know
>how you make out.

mtdean at thirdcontact

Mar 15, 2008, 8:14 PM

Post #5 of 5 (442 views)
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Re: Xine Dropping Frames over 100Mbit NFS Mount [In reply to]

On 03/15/2008 11:09 PM, Mache Creeger wrote:
> Looking at the NFS documentation, it says that the NFS default is TCP.

Depends on which version of NFS you're using. Besides, relying on
defaults means you're obfuscating the desired configuration, so just set
it explicitly.

Mike
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