[mythtv-users] DVB Playback Problems

Michael J. Lynch mlynch at gcom.com
Wed Aug 25 08:56:47 EDT 2004


I had this exact same problem with the exact same software set.  The 
problem may be with X.org.  To find out try lowering your capture 
resolution to something ridiculously low (like 100x100) and see if you 
get video.  If so, the problem is most likely the XORG distro of X.  The 
only way I found to fix the problem is to revert to an XFREE distro of 
XORG.  All Redhat distros prior to FC2 (E.G. 7, 8, 9, and FC1) use XFREE 
and FC2 uses XORG.  You can also tell if it is your X distro by running 
mythfrontend without any options in xterm and after playback or watch 
live tv, see if are any "X error: BadAlloc" messages.  If so, it's 
definitely the XORG distro.  Hope this helps.


Ben Stanley wrote:

>Hi,
>
>I have mythtv-0.15.1 running on FC2. I can watch DVB fine with xine.
>Mythtv can record at the backend. I can preview recorded programs in the
>little preview window in the recorded programs page. However, when I try
>to watch live tv, or try to watch a recording, I get sound OK, but the
>screen is black.
>
>When I run 
>mythfrontend --verbose playback
>I get lots of messages (see end), but nothing very enlightening.
>
>Any ideas on things to try or places to investigate would be
>appreciated. I already trawled the mailing lists and my problem seems to
>be unique.
>
>I also have a question about configuring sound. It wants to use OSS, but
>I have compiled it with alsa support and would rather use that. Where
>can I configure that?
>
>Thanks in advance for any help,
>Ben.
>
>Full output:
>
>[ben at dragon ben]$ mythfrontend --verbose playback
>2004-08-25 22:17:51 mythfrontend version: 0.15.20040525-1 www.mythtv.org
>2004-08-25 22:17:51 Enabled verbose msgs : important general playback
>mythtv: could not connect to socket
>mythtv: No such file or directory
>lirc_init failed for mythtv, see preceding messages
>2004-08-25 22:17:54 Registering Internal as a media playback plugin.
>2004-08-25 22:17:54 Registering MythDVD DVD Media Handler as a media
>handler
>2004-08-25 22:17:54 Registering MythDVD VCD Media Handler as a media
>handler
>2004-08-25 22:17:56 Registering MythMusic Media Handler as a media
>handler
>2004-08-25 22:18:08 Connecting to backend server: 192.168.1.2:6543 (try
>1 of 5)
>2004-08-25 22:18:08 Using protocol version 8
>2004-08-25 22:18:08 Using protocol version 8
>2004-08-25 22:18:10 Changing from None to None
>2004-08-25 22:18:12 All Programs
>2004-08-25 22:18:18 Interlaced: -1  video_height: 576  fps: 25
>2004-08-25 22:18:18 Estimated bitrate = 256000
>Input #0, mpeg, from
>'/home/video/1000_20040825221300_20040825222500.nuv':
>  Stream #0.0: Video: mpeg2video, 720x576, 25.00 fps
>  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>2004-08-25 22:18:18 Image size. dispxoff 0, dispyoff: 0, dispwoff: 0,
>disphoff: 0
>2004-08-25 22:18:18 Image size. imgx 0, imgy: 0, imgw: 720, imgh: 576
>2004-08-25 22:18:18 waiting for prebuffer...
>2004-08-25 22:18:18 prebuffer wait timed out..
>2004-08-25 22:18:18 waiting for prebuffer...
>'video_output' mean = '41416.11', std. dev. = '11453.41', fps = '24.15'
>0
>2004-08-25 22:18:25 Interlaced: -1  video_height: 576  fps: 25
>2004-08-25 22:18:25 Estimated bitrate = 256000
>Input #0, mpeg, from
>'/home/video/1020_20040825145300_20040825150000.nuv':
>  Stream #0.0: Video: mpeg2video, 720x576, 25.00 fps
>  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>2004-08-25 22:18:25 Image size. dispxoff 0, dispyoff: 0, dispwoff: 0,
>disphoff: 0
>2004-08-25 22:18:25 Image size. imgx 0, imgy: 0, imgw: 720, imgh: 576
>2004-08-25 22:18:25 waiting for prebuffer...
>2004-08-25 22:18:26 prebuffer wait timed out..
>2004-08-25 22:18:26 waiting for prebuffer...
>'video_output' mean = '40250.88', std. dev. = '16371.98', fps = '24.84'
>0
>2004-08-25 22:18:31 Output filters for this recording are:
>'linearblend,'
>2004-08-25 22:18:31 Interlaced: -1  video_height: 576  fps: 25
>2004-08-25 22:18:31 Estimated bitrate = 256000
>2004-08-25 22:18:31 Interlaced: -1  video_height: 576  fps: -1
>Input #0, mpeg, from
>'/home/video/1020_20040825145300_20040825150000.nuv':
>  Stream #0.0: Video: mpeg2video, 720x576, 25.00 fps
>  Stream #0.1: Audio: mp2, 48000 Hz, stereo, 256 kb/s
>2004-08-25 22:18:31 Position map found
>2004-08-25 22:18:31 Opening OSS audio device '/dev/dsp'.
>2004-08-25 22:18:31 Audio fragment size: 4096
>2004-08-25 22:18:31 Over/underscan. V: 0, H: 0, XOff: 0, YOff: 0
>2004-08-25 22:18:31 Using XV port 69
>2004-08-25 22:18:31 Image size. dispxoff 0, dispyoff: 149, dispwoff:
>1280, disphoff: 726
>2004-08-25 22:18:31 Image size. imgx 0, imgy: 0, imgw: 720, imgh: 576
>2004-08-25 22:18:32 Changing from None to WatchingPreRecorded
>2004-08-25 22:18:32 waiting for prebuffer...
>2004-08-25 22:18:32 prebuffer wait timed out..
>2004-08-25 22:18:32 waiting for prebuffer...
>2004-08-25 22:18:33 Delaying to next trigger: 163519547
>'video_output' mean = '41190.37', std. dev. = '69378.27', fps = '24.28'
>-121
>'video_output' mean = '39899.43', std. dev. = '65898.56', fps = '25.06'
>-110
>'video_output' mean = '40021.19', std. dev. = '69990.07', fps = '24.99'
>-86
>'video_output' mean = '40388.36', std. dev. = '65140.77', fps = '24.76'
>-108
>'video_output' mean = '43626.65', std. dev. = '70342.31', fps = '22.92'
>-513
>'video_output' mean = '36008.81', std. dev. = '57287.23', fps = '27.77'
>-91
>'video_output' mean = '39875.74', std. dev. = '62248.21', fps = '25.08'
>-80
>'video_output' mean = '40664.74', std. dev. = '72377.07', fps = '24.59'
>-90
>'video_output' mean = '40133.11', std. dev. = '65065.87', fps = '24.92'
>-79
>'video_output' mean = '39137.70', std. dev. = '70642.15', fps = '25.55'
>-106
>'video_output' mean = '40530.05', std. dev. = '66431.34', fps = '24.67'
>-151
>'video_output' mean = '40239.97', std. dev. = '68688.89', fps = '24.85'
>-82
>'video_output' mean = '39488.61', std. dev. = '67258.17', fps = '25.32'
>-137
>'video_output' mean = '40297.51', std. dev. = '72190.71', fps = '24.82'
>-167
>'video_output' mean = '40336.44', std. dev. = '65412.78', fps = '24.79'
>-199
>'video_output' mean = '41341.81', std. dev. = '71015.15', fps = '24.19'
>-324
>'video_output' mean = '39687.75', std. dev. = '66292.24', fps = '25.20'
>-307
>'video_output' mean = '41486.97', std. dev. = '69574.03', fps = '24.10'
>-449
>'video_output' mean = '36322.00', std. dev. = '58253.63', fps = '27.53'
>-82
>'video_output' mean = '40430.99', std. dev. = '66911.20', fps = '24.73'
>-147
>'video_output' mean = '39667.19', std. dev. = '58723.79', fps = '25.21'
>-85
>2004-08-25 22:19:58 Changing from WatchingPreRecorded to None
>2004-08-25 22:19:58 Changing from None to None
>2004-08-25 22:19:59 Interlaced: -1  video_height: 576  fps: 25
>2004-08-25 22:19:59 Estimated bitrate = 256000
>
>
>  
>
>------------------------------------------------------------------------
>
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>  
>

-- 
Michael J. Lynch
Gcom Inc.


"What if the hokey-pokey IS what it's
all about?" -- author unknown



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