[mythtv-users] HDHR QAM: Streams ok to VLC but not Mythtv

BP lists at qucae.com
Wed Jan 3 07:38:02 UTC 2007


P S wrote:
> On 1/2/07, P S <guierrmo at gmail.com> wrote:
>> On 1/2/07, R. G. Newbury <newbury at mandamus.org> wrote:
>>> P S wrote:
>>>> I'm using and HDHomerun to tune QAM256 on comcast.  Most channels are
>>>> fine but there are a few that will tune and lock but will not display
>>>> in live TV or recorded programs.  Xine will play, but there is not
>>>> audio.
>>>>
>>>> I'm running trunk svn 12306.
>>>>

Hopefully this will be helpful...

I'm having the same issue with svn 12360.  Channels/Programs that play 
fine in VLC (both the same linux box and a Windows box) do not play in 
Myth.  My cpu shows ~98% idle and the lock is showing LAM with 98% 
signal.  About 1/3 of my channels work.  I am using QAM with Comcast.

Not sure if it makes a difference or not, but I did upload the 20061231 
firmware via the windows hdhomerun_config_gui tool.  I am also using the 
  20061231 libhdhomerun compiled source to initiate the stream to VLC.

I have tried the suggestions in this thread to uncheck the encrypted 
setting and to start with a fresh database.  For what it is worth, the 
channel scan with the encrypted setting checked gave the same results as 
the hdhomerun_config tool and all those channels work in VLC.

VLC does spew the following:  libdvbpsi:  error (PMT deoder):  invalid 
section (table_id == 0x00).  Although it does that on streams that even 
Myth plays.  VLC happily plays regardless.

With -v record,playback,channel, I get "NVP: Waiting for prebuffer" 
constantly spewed.  Following is an example:

2007-01-02 23:10:12.744 detectInterlace(Detect Scan, Interlaced Scan, 
29.97, 480) ->Interlaced Scan
2007-01-02 23:10:12.744 AFD: Looking for decoder for MPEG2VIDEO
2007-01-02 23:10:12.744 AFD: Opened codec 0x19c6dd0, id(MPEG2VIDEO) 
type(Video)
2007-01-02 23:10:12.744 AFD: Stream #2, has id 0x2114 codec id AC3, type 
Audio, bitrate 128000 at 0x0xbb6f70
2007-01-02 23:10:12.744 AFD: Looking for decoder for AC3
2007-01-02 23:10:12.744 AFD: Opened codec 0xc34f90, id(AC3) type(Audio)
2007-01-02 23:10:12.744 RingBuf(/mnt/store/4090_20070102230955.mpg): 
CalcReadAheadThresh(0 KB)
                          -> threshhold(64 KB) min read(0 KB) blk 
size(32 KB)
2007-01-02 23:10:12.747 Opening ALSA audio device 'default'.
2007-01-02 23:10:12.749 NVP: Enabling Audio
2007-01-02 23:10:12.749 Dec: Trying to select track (w/lang)
2007-01-02 23:10:12.749 Dec: Selecting first track
2007-01-02 23:10:12.749 Dec: Selected track #1 in the Unknown language(0)
2007-01-02 23:10:12.749 Resyncing position map. posmapStarted = 0 
livetv(1) watchingRec(0)
2007-01-02 23:10:12.750 Position map filled from DB to: 384
2007-01-02 23:10:12.750 SyncPositionMap watchingrecording, from DB: 16 
entries
2007-01-02 23:10:12.750 Filling position map from 385 to 480
2007-01-02 23:10:12.750 Position map filled from Encoder to: 470
2007-01-02 23:10:12.750 SyncPositionMap watchingrecording total: 19 entries
2007-01-02 23:10:12.750 SyncPositionMap, new totframes: 470, new length: 
15, posMap size: 19
2007-01-02 23:10:12.750 AFD: Partial position map found
2007-01-02 23:10:12.750 AFD: Successfully opened decoder for file: 
"/mnt/store/4090_20070102230955.mpg". novideo(0)
2007-01-02 23:10:12.751 NVP: DoPlay: rate: 29.97 speed: 1 skip: 1 => new 
interval 33366
2007-01-02 23:10:12.751 Set video sync frame interval to 33366
2007-01-02 23:10:12.751 NVP: Stretch Factor 1, allow passthru
2007-01-02 23:10:12.751 RingBuf(/mnt/store/4090_20070102230955.mpg): 
CalcReadAheadThresh(0 KB)
                          -> threshhold(64 KB) min read(0 KB) blk 
size(32 KB)
2007-01-02 23:10:12.751 Resyncing position map. posmapStarted = 0 
livetv(1) watchingRec(1)
2007-01-02 23:10:12.752 Position map filled from DB to: 384
2007-01-02 23:10:12.752 SyncPositionMap watchingrecording, from DB: 16 
entries
2007-01-02 23:10:12.752 Filling position map from 385 to 480
2007-01-02 23:10:12.752 Position map filled from Encoder to: 470
2007-01-02 23:10:12.752 SyncPositionMap watchingrecording total: 19 entries
2007-01-02 23:10:12.761 NVP: Waiting for prebuffer.. 5 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2007-01-02 23:10:12.762 Avg read interval was 186 msec. 64K block size
2007-01-02 23:10:12.778 Avg read interval was 197 msec. 96K block size
2007-01-02 23:10:12.794 Avg read interval was 197 msec. 128K block size
2007-01-02 23:10:12.810 Avg read interval was 197 msec. 160K block size
2007-01-02 23:10:12.826 Avg read interval was 197 msec. 192K block size
2007-01-02 23:10:12.911 NVP: Waiting for prebuffer.. 6 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2007-01-02 23:10:12.962 WriteAudio: buffer underrun
2007-01-02 23:10:13.061 NVP: Waiting for prebuffer.. 7 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2007-01-02 23:10:13.211 NVP: Waiting for prebuffer.. 8 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2007-01-02 23:10:13.362 NVP: Waiting for prebuffer.. 9 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2007-01-02 23:10:13.502 NVP: Prebuffer wait timed out 10 times.
2007-01-02 23:10:13.512 NVP: Waiting for prebuffer.. 0 
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA


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