[mythtv-users] /dev/video0 problem

Timothy Chartier thymus at earthling.net
Tue Feb 6 03:50:10 UTC 2007


 Ok, now that things have calmed down from the holidays and stuff I have
been able to get back to my MythTV project.
Before it got side tracked I found that while MythTV worked it was doing
something strange in the way of not recording the whole time alloted. I
found that when recording that I was only getting aobut 20 min for a 30
min show. At the time I tohught it was a problem with MythTV. Sence then
I tried
cat /dev/video0 > 10min.mpg
for 10 min (yes I used a timmer) and when I went to view it with VLC on
my Powerbook (OSX) it was only 7 min 18 sec long. That scales up to the
same 20 min for a 30 min show. Given this it seems I have the card
configured incorrectaly. Are there some settings I need to set to get it
to properly decode the RCA input lines from my satalite reciver? There
does appear to be a few droped frames in the message history of VLC but I
do not know if this applies to this problem or not.  Below is log from
the VLC program in the hopes that it points to a reason for the problem
as there are a lot of warnings in there.

main debug: CPU has capabilities AltiVec FPU
main debug: looking for memcpy module: 2 candidates
main debug: using memcpy module "memcpyaltivec"
main debug: waiting for thread completion
main debug: thread 33658368 (playlist) created at priority -47
(playlist/playlist.c:184)
main debug: waiting for thread completion
main debug: thread 33580544 (preparser) created at priority -47
(playlist/playlist.c:210)
main debug: looking for interface module: 1 candidate
main debug: using interface module "hotkeys"
main debug: thread 34542080 (interface) created at priority -47
(interface/interface.c:198)
main debug: looking for interface module: 3 candidates
main debug: using interface module "macosx"
main debug: thread 33667584 (manage) created at priority -47
(interface/interface.c:164)
main debug: adding playlist item `10min.mpg' (
/Users/thymus/Desktop/10min.mpg )
main debug: creating new input thread
main debug: waiting for thread completion
main debug: thread 34849792 (input) created at priority 37
(input/input.c:261)
main debug: creating statistics handler
main debug: `/Users/thymus/Desktop/10min.mpg' gives access `' demux `'
path `/Users/thymus/Desktop/10min.mpg'
main debug: creating demux: access='' demux=''
path='/Users/thymus/Desktop/10min.mpg'
main debug: looking for access_demux module: 1 candidate
macosx debug: input has changed, refreshing interface
main debug: creating access '' path='/Users/thymus/Desktop/10min.mpg'
main debug: looking for access2 module: 7 candidates
vcd debug: trying .cue file: /Users/thymus/Desktop/10min.cue
access_file debug: opening file `/Users/thymus/Desktop/10min.mpg'
main debug: using access2 module "access_file"
main debug: pre-buffering...
main debug: received first data for our buffer
main debug: pre-buffering done 1408981 bytes in 0s - 21726 kbytes/s
main debug: creating demux: access='' demux=''
path='/Users/thymus/Desktop/10min.mpg'
main debug: looking for demux2 module: 43 candidates
main debug: using demux2 module "ps"
main debug: looking for a subtitle file in /Users/thymus/Desktop/
main debug: `/Users/thymus/Desktop/10min.mpg' successfully opened
main debug: selecting program id=0
main debug: looking for decoder module: 25 candidates
main debug: using decoder module "libmpeg2"
main debug: thread 34919936 (decoder) created at priority -47
(input/decoder.c:159)
libmpeg2 debug: 720x480 (display 720,480), aspect 576000, sar 8:9, 29.971
fps
main debug: no usable vout present, spawning one
main debug: window size: 720x540
main debug: looking for video output module: 3 candidates
opengl debug: Texture size: 720x480
main debug: looking for opengl provider module: 1 candidate
macosx debug: display is Quartz Extreme accelerated
main debug: looking for decoder module: 25 candidates
main debug: Registering subpicture channel, ID: 2
main debug: Registering subpicture channel, ID: 3
main debug: Registering subpicture channel, ID: 4
main debug: Registering subpicture channel, ID: 5
ffmpeg debug: libavcodec initialized (interface 3344640 )
ffmpeg debug: ffmpeg codec (MPEG Audio layer 1/2) started
main debug: using decoder module "ffmpeg"
main debug: thread 35092992 (decoder) created at priority 37
(input/decoder.c:159)
main debug: no aout present, spawning one
main debug: looking for audio output module: 2 candidates
main debug: VLC is looking for: 's16b' 48000 Hz Stereo frame=1 samples/4
bytes
auhal debug: system has [1] device(s)
auhal debug: DevID: 0xa DevName: Built-in Audio
auhal debug: supported format: [44100][lpcm][30][4][1][4][2][16]
auhal debug: current format is: [44100][lpcm][43][4][1][4][2][32]
auhal debug: layout of AUHAL has 2 channels
auhal debug: selected 2 physical channels for device output
auhal debug: VLC will output: Stereo
auhal debug: we set the AU format: [48000][lpcm][11][8][1][8][2][32]
auhal debug: the actual set AU format is
[48000][lpcm][11][8][1][8][2][32]
main debug: using audio output module "auhal"
main debug: output 'fl32' 48000 Hz Stereo frame=1 samples/8 bytes
main debug: mixer 'fl32' 48000 Hz Stereo frame=1 samples/8 bytes
main debug: no need for any filter
main debug: looking for audio mixer module: 3 candidates
main debug: using audio mixer module "trivial_mixer"
main debug: input 's16b' 48000 Hz Stereo frame=1 samples/4 bytes
main debug: filter(s) 's16b'->'fl32' 48000 Hz->48000 Hz Stereo->Stereo
main debug: looking for audio filter module: 24 candidates
main debug: using audio filter module "s16tofloat32"
main debug: found a filter for the whole conversion
main debug: filter(s) 'fl32'->'fl32' 52800 Hz->48000 Hz Stereo->Stereo
main debug: looking for audio filter module: 24 candidates
main debug: using audio filter module "bandlimited_resampler"
main debug: found a filter for the whole conversion
main warning: non-dated buffer received
main warning: PTS is out of range (180604), dropping buffer
main warning: PTS is out of range (161384), dropping buffer
main warning: PTS is out of range (138256), dropping buffer
main warning: PTS is out of range (115204), dropping buffer
main warning: PTS is out of range (92058), dropping buffer
main warning: PTS is out of range (68900), dropping buffer
main warning: PTS is out of range (69743), dropping buffer
main warning: PTS is out of range (22648), dropping buffer
main warning: PTS is out of range (-495), dropping buffer
main warning: PTS is out of range (-23650), dropping buffer
main debug: using opengl provider module "macosx"
main debug: using video output module "opengl"
main debug: got 1 direct buffer(s)
main debug: picture in 720x480 (0,0,720x480), chroma I420, ar 4:3, sar
8:9
main debug: picture user 720x480 (0,0,720x480), chroma I420, ar 4:3, sar
8:9
main debug: picture out 720x480 (0,0,720x480), chroma YUY2, ar 4:3, sar
8:9
main debug: looking for chroma module: 6 candidates
main debug: using chroma module "i420_yuy2_altivec"
main debug: indirect render, mapping render pictures 0-7 to system
pictures 1-8
main debug: waiting for thread completion
main debug: thread 36672512 (video output) created at priority 37
(video_output/video_output.c:421)
main warning: vout synchro warning: pts != current_date (854106)
main warning: late picture skipped (530584)
main warning: late picture skipped (50414)
main warning: late picture skipped (36557)
main warning: late picture skipped (18439)
main warning: late picture skipped (5406)
main debug: decoded 83/105 pictures
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