[mythtv-users] No video playback - LiveTV or recordings (hints pls!)

Andrew Codrington acodring at yahoo.com
Tue Aug 16 06:01:34 UTC 2005

Thanks for the reply Nick. Answers inline.

--- Nick <knowledgejunkie at gmail.com> wrote:
> A couple questions:
> 1) Which MPEG2 playback library are you using in MythTV (check
> frontend settings - TV - playback) See if using libmpeg2 helps (or
> deselecting it if it is already selected)
Same problem either way.

> 2) Does Mplayer itself play MPEG2 video normally?
No, same problem (after figuring out I needed to "chmod a+s `which mplayer`").
Audio plays, no video.

> 3) Does uninstalling Mplayer and the codecs resolve the problem? 
Haven't gone that far yet. 

>If it does, give Xine a whirl and see if you get the same problems.
I have Xine installed too. Audio, no video.

Noticed something in Jarod's Howto about "mythfrontend -v All" to get more verbose info.
Noticed it was complaining about audio buffers. Tried to switch to ALSA but after some struggles
got to a point where it tells me 'but alsa support not compiled in'.

Learning lots here, but still managing to go round in circles!

I'll attach mplayer messages for kicks.

Thanks in advance for any assistance.

Andrew Codrington

sh-3.00$ mplayer -vo xv -ao alsa ~/my.mpg
MPlayer 1.0pre7-3.3.5 (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
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE

Playing /home/mythtv/my.mpg.
MPEG-PS file format detected.
VIDEO:  MPEG2  720x480  (aspect 2)  29.970 fps  9600.0 kbps (1200.0 kbyte/s)
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
vo: X11 running at 640x480 with depth 24 and 32 bpp (":0.0" => local display)
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 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 - 720 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] 720x480 => 720x540 Planar YV12
aspect: Warning: no suitable new res found!
aspect: Warning: no suitable new res found!
aspect: Warning: no suitable new res found!
New_Face failed. Maybe the font path is wrong. 2 ??% ??% ??,?% 0 0
Please supply the text font file (~/.mplayer/subfont.ttf).
subtitle font: load_sub_face failed.
A:  15.4 V:  15.4 A-V:  0.004 ct:  0.051 453/453 15%  2%  0.9% 0 0
alsa-uninit: pcm closed

Exiting... (End of file)

Andrew Codrington

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