HDTV is stuttering

This sounds like you are using a playback profile that is not working with
your hardware. I suggest looking into using CPU--/Slim unless you have an
nvidia card that support VDPAU --or-- are dealing with H.264 encoded
recordings.

-Nick

On Wed, Oct 14, 2009 at 11:02 AM, walsi <email address hidden> wrote:

> Public bug reported:
>
> i have some troubles watchin hdtv, sound is ok but video ist stuttering
> und realy bad. no matter if i watch livetv or as a recording. when i
> watch the recordet file with vlc it is playing fine. i think it's not a
> hardware problem, because the cpu is running with a low % number. see
> the top.log. i gues it's a software problem, maybe just a tuning
> problem.
>
> ** Affects: mythbuntu
> Importance: Undecided
> Status: New
>
> --
> HDTV is stuttering
> https://bugs.launchpad.net/bugs/451394
> You received this bug notification because you are a member of Mythbuntu
> Developers, which is subscribed to Mythbuntu.
>

Please do let us know what you find. Thanks!

Hi Nick

My card is supporting VDPAU thats not the problem. When i use the slim playback profil the cpu raises to 100% but the picture is still stuttering. The interessting part i figured out is, that mythtv says it is (stereo HDTV, 720p resolution) but vlc, that plays it correct, says it is 1080 x 720. So, i sugest that mythtv is not recognizing the resolution correct and thats is the reason for that stuttering.

walsi

Walsi,

If your card supports VDPAU my suggestion is this:

Setup a new Playback Profile using VDPAU the decoder and for the Onscreen
rendering, for the Deinterlacer use Bob (Hw x2) and the the secondary chose
the one of the Hw x1 options (I Cant recal the full name at the moment but I
use the one starting with "t")

Just leave the res options blank so it will use it on any res. Then report
back with the results.

-Nick

On Wed, Oct 14, 2009 at 1:42 PM, walsi <email address hidden> wrote:

> Hi Nick
>
> My card is supporting VDPAU thats not the problem. When i use the slim
> playback profil the cpu raises to 100% but the picture is still
> stuttering. The interessting part i figured out is, that mythtv says it
> is (stereo HDTV, 720p resolution) but vlc, that plays it correct, says
> it is 1080 x 720. So, i sugest that mythtv is not recognizing the
> resolution correct and thats is the reason for that stuttering.
>
> walsi
>
> --
> HDTV is stuttering
> https://bugs.launchpad.net/bugs/451394
> You received this bug notification because you are a member of Mythbuntu
> Developers, which is subscribed to Mythbuntu.
>

Nick

I did setup the new profile as you recomended, but its still the same. I started mythfrontend with the following options.

mythfrontend -v playback

maby you can find in this log fil the reason form bad video.

walsi

Walsi,

Thanks. I will have a look at it later this evening.

-Nick

On Wed, Oct 14, 2009 at 4:04 PM, walsi <email address hidden> wrote:

> Nick
>
> I did setup the new profile as you recomended, but its still the same. I
> started mythfrontend with the following options.
>
> mythfrontend -v playback
>
> maby you can find in this log fil the reason form bad video.
>
> walsi
>
> ** Attachment added: "myth.log"
> http://launchpadlibrarian.net/33679064/myth.log
>
> --
> HDTV is stuttering
> https://bugs.launchpad.net/bugs/451394
> You received this bug notification because you are a member of Mythbuntu
> Developers, which is subscribed to Mythbuntu.
>

It looks i'm not the only one with this bug.

http://svn.mythtv.org/trac/ticket/6922

walsi

Do you have VSync enabled in nvidia-settings by chance?

-Nick

On Wed, Oct 14, 2009 at 4:21 PM, walsi <email address hidden> wrote:

> It looks i'm not the only one with this bug.
>
> http://svn.mythtv.org/trac/ticket/6922
>
> walsi
>
> ** Bug watch added: mythtv.org bug tracker #6922
> http://svn.mythtv.org/trac/ticket/6922
>
> --
> HDTV is stuttering
> https://bugs.launchpad.net/bugs/451394
> You received this bug notification because you are a member of Mythbuntu
> Developers, which is subscribed to Mythbuntu.
>

Hello Nick

VSync is enabled, so far as i can see. I ad some logfiles, xorg.conf etc. so can maybe find a solution.

I havent had a chance to review all the logs, but try disabling VSync.

-Nick

On Thu, Oct 15, 2009 at 5:40 PM, walsi <email address hidden> wrote:

>
> ** Attachment added: ".nvidia-settings-rc"
> http://launchpadlibrarian.net/33760613/.nvidia-settings-rc
>
> --
> HDTV is stuttering
> https://bugs.launchpad.net/bugs/451394
> You received this bug notification because you are a member of Mythbuntu
> Developers, which is subscribed to Mythbuntu.
>

Howdy walsi, did disabling vsync help at all?

Hello Nick

No disabling vsync didnt help. hdtv is still stuttering. yesterday i've testet freevdr and hdtv was running but i still prefair mythtv, it feels better for me. i'm positiv that you and your frinds will find a solution for this problem.

walsi

Hello all,

it looks like I have the same Problem.
In the Internet I found a mythtv ticket, where the Problem is fixed.
http://svn.mythtv.org/trac/ticket/7522
I hope that the fix could be build in a trunk, because i'm a newbie i don't want to compile on my on.
Juergen.

Upstreams fix will appear in the next nightly trunk (0.23) build, and assuming that feature freeze happens in time, the next Lucid alpha.

This bug was fixed in the package mythtv - 0.23.0~trunk23567-0ubuntu1

---------------
mythtv (0.23.0~trunk23567-0ubuntu1) lucid; urgency=low

  * Bump builds to start with 0.23
  * debian/control:
    - Fix vcs-bzr
    - Update depends to include ttf-droid, ttf-liberation, and ttf-dejavu.
      (LP: #224114)
    - Drop quilt build-dep, it appears to be included w/ dh7
    - Bump standards version
  * Introduces stable pulseaudio support (In Theory! :)) (LP: #311328)
  * Print message to stdout for MythTV.pm (LP: #327406)
  * debian/patches:
    - Drop 16_hal_shutdown. No longer necessary after r23518.
  * Allow shutdowns when mythtv is running (LP: #174712)
    - Comes from upstream changeset r23455.
  * Mythbackend now supports the --user flag to drop permissions from
    upstream changeset r23521.
  * Use the upstart script from the upstream contrib directory instead.
    Now uses the --user flag to drop permissions. (LP: #445953)
  * Update 30_python26_transition for changes upstream.
  * mythtv-database.templates:
    - refer to the proper location for backups.
  * Switch to use the upstream backup scripts. (LP: #469792)
  * Helps with HDTV stuttering. (LP: #451394)
  * Drop old debian/myth-*.sh scripts since we now use dbus for shutdown
    and reboot etc.
  * Drop old debian/mythtv-backend.default. It's just available for upgrades.
  * Drop old debian/mythtv-backend.init initscript. We're only supporting
    upstart going forward with these builds.
  * Drop unnecessary patch, 02_settings_pro.dpatch
  * Drop unused patch, 23_video_device_symlinks.dpatch
  * Drop unused patch, 25_skiploop_option.dpatch
  * Convert packaging to dh7.
  * Convert packaging to source v3 (w/ quilt).
  * Add debian/README.source as a symlink to the quilt README.source
  * Convert all .files into .install.
  * Refresh patches as quilt format instead
  * Rewrite get-orig-source rules to parse the changelog for version info.
  * Drop any of the Top Secret Options build flags
  * Include a custom snippet for debian/rules mythtv packages in libmyth-dev.
  * Drop old, unused templates from debian/templates.
 -- Mario Limonciello <email address hidden> Tue, 16 Feb 2010 21:23:04 -0600

http://laroyaleseresienne.be/product.php?page=6fa