[mythtv-users] Glitches in firewire capture from DCT-6200

Wed Dec 28 21:38:03 EST 2005

I'm using the analog output (composite jack) on my soundcard to go straight
into my stereo receiver.  My master backend/frontend machine is an AMD
Sempron 2300.  Here's the output from mplayer::

root at localhost home]# mplayer -vo xv
1005_20051218123000_2005121813 0000.nuv
MPlayer 1.0pre7-3.4.3 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon MP/XP Thoroughbred (Family: 6,
Stepping: 1)
Detected cache-line size is 64 bytes
CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0

Opening joystick device /dev/input/js0
Can't open joystick device /dev/input/js0 : No such file or directory
Can't init input joystick
Setting up LIRC support...
mplayer: could not open config files /root/.lircrc and /etc/lircrc
mplayer: No such file or directory
Failed to read LIRC config file ~/.lircrc.
You will not be able to use your remote control.
Playing 1005_20051218123000_20051218130000.nuv.
TS file format detected.
DEMUX OPEN, AUDIO_ID: -1, VIDEO_ID: -1, SUBTITLE_ID: -1,
PROBING UP TO 2000000, PROG: 0
VIDEO MPEG2(pid=2304)AUDIO A52(pid=2305) NO SUBS (yet)!  PROGRAM N. 1
Opened TS demuxer, audio: 2000(pid 2305), video: 10000002(pid
2304)...POS=5640
VIDEO:  MPEG2  528x480  (aspect 2)  29.970 fps  5500.0 kbps (687.5
kbyte/s)
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 2.0 (stereo)  48000 Hz  192.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm:liba52 (AC3-liba52)
==========================================================================
vo: X11 running at 1024x768 with depth 24 and 32 bpp (":0.0" => local
display)
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 528 x 480 (preferred csp: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder
libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
Checking audio filter chain for 48000Hz/2ch/s16le ->
48000Hz/2ch/s16le...
AF_pre: 48000Hz/2ch/s16le
alsa-init: 1 soundcard found, using: default
alsa: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little
Endian
AO: [alsa] 48000Hz 2ch s16le (2 bps)
Building audio filter chain for 48000Hz/2ch/s16le ->
48000Hz/2ch/s16le...
Starting playback...
VDec: vo config request - 528 x 480 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [xv] 528x480 => 640x480 Planar YV12
alsa-space: xrun of at least 0.128 msecs. resetting stream% ??,?% 1 0
A:12534.8 V:12534.9 A-V: -0.052 ct: -0.657 409/397  8%  1%  0.9% 15 0
demux_mpg: 24000/1001fps progressive NTSC content detected, switching
framerate.
A:12535.6 V:12535.6 A-V:  0.046 ct: -0.624 427/415  8%  1%  0.9% 15 0
demux_mpg: 30000/1001fps NTSC content detected, switching framerate.
Warning! FPS changed 23.976 -> 29.970  (-5.994000) [4]  1%  0.9% 15 0
A:12536.9 V:12537.0 A-V: -0.057 ct: -0.571 469/454  8%  1%  0.9% 15 0
demux_mpg: 24000/1001fps progressive NTSC content detected, switching
framerate.

On 12/24/05, Steve Adeff <adeffs at gmail.com> wrote:
>
> On Friday 23 December 2005 17:08, Alex Brekken wrote:
> > Playing it back through mplayer looks pretty good - I didn't see any
> > faults.  THEN, I actually re-named the file to overwrite an existing
> show
> > saved on my master machine.  This way I could playback the show through
> > myth, to make the simulation as accurate as possible I guess.  Anyway,
> when
> > viewing the show through Myth, it DOES have the same slo-mo effect as it
> > does when playing it back via the slave backend.  So that completely
> rules
> > out the network as a possible failing point.
> >
> > Weird...  As I stated before, I have no problem playing back recordings
> > made via my PVR-250.  One thing I did notice, the codec I'm using for
> > PVR-250 recordings is DVD-special2.  I believe Firewire recordings are
> TS.
> > Could this be it??  I wouldn't think so since then everyone would
> probably
> > have the same problem.
> >
> > On 12/18/05, Steve Adeff <adeffs at gmail.com> wrote:
> > > On Sunday 18 December 2005 08:31, Alex Brekken wrote:
> > > > Steve, I'd like to try that (copying the .nuv file over to the other
> > >
> > > Myth
> > >
> > > > box and playing locally from it's own hard drive) but I'm not
> exactly
> > >
> > > sure
> > >
> > > > of the best way to do that...  Are you suggesting to add entries
> into
> > >
> > > the
> > >
> > > > database, etc, and playing it within Myth, - or just manually
> playing
> > > > it using mplayer?
> > >
> > > just manually play it with mplayer. Lets see if the recording of the
> > > firewire
> > > signal is working ok before we blame that. Since you don't get typical
> > > mpeg
> > > breakup my theory is your capture is working fine, its one of the
> steps
> > > in your playback chain that is causing the issue.
>
> can you paste the stream info for the firewire captures from mplayer's
> output?
> are you using the analog output of your soundcard or passing the digital
> audio through to a receiver? whats the cpu/speed of your system?
>
> --
> Steve
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