[mythtv-users] mplayer doesn't work when started by mythfrontend

Andrew Junev a-j at a-j.ru
Mon Dec 7 20:58:19 UTC 2009

Hello Nick,

Monday, December 7, 2009, 10:53:04 PM, you wrote:

> On Tue, Dec 8, 2009 at 8:43 AM, Andrew Junev <a-j at a-j.ru> wrote:
>> Hello Fedor,
>> Monday, December 7, 2009, 7:19:55 PM, you wrote:
>>> I've heard about mplayer getting confused and trying to use wrong
>>> codec (i.e. applying a codec from -vc even when it should use its own
>>> choice of codec). The following script was created for early versions
>>> of VDPAU, it shows how to detect codec outside of mplayer and
>>> customize the command line. You may be able to hack it to change -vc
>>> in a way which makes your setup work.
>>> #!/bin/bash
>>> <skipped>
>> I think I saw this script already.
>> As I understand, mplayer writes to the terminal about its codecs in
>> use when playing a file. In my case it selects the same codecs when
>> starting from both, plain terminal window and from mythfrontend.
>> So in here there is no difference, at least according to the log.
>> Perhaps I'll try to run mplayer from mythfrontend without forcing it
>> to use VDPAU, maybe there will be some difference. But even if there
>> will - it doesn't solve my problem, as I do want to use VDPAU...

> But not for that file perhaps (its an avi, which can contain h.264,
> but is more likely to be xvid or divx)

Ummm, I tried it with a regular xvid file, using a regular '-vo xv'
(meaning, without VDPAU). The result is absolutely the same - still
image when started from mythfrontend, and a normal playback when
started from a terminal window.

Here's the corresponding part of the mythfrontend log:

MPlayer SVN-r29800-4.4.2 (C) 2000-2009 MPlayer Team

Playing /video.archive/AMovie.avi.
AVI file format detected.
[aviheader] Video stream found, -vid 0
[aviheader] Audio stream found, -aid 1
VIDEO:  [XVID]  640x352  12bpp  25.000 fps  1844.0 kbps (225.1 kbyte/s)
Clip info:
 Software: VirtualDubMod (build 2540/release)
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
Opening audio decoder: [liba52] AC3 decoding with liba52
No accelerated IMDCT transform found
AUDIO: 48000 Hz, 2 ch, floatle, 384.0 kbit/12.50% (ratio: 48000->384000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
AO: [pulse] 48000Hz 2ch floatle (4 bytes per sample)
Starting playback...
[mpeg4 @ 0x87475c0]Invalid and inefficient vfw-avi packed B frames detected
Movie-Aspect is 1.82:1 - prescaling to correct movie aspect.
VO: [xv] 640x352 => 640x352 Planar YV12  [fs] [zoom]

So it doesn't seem to be caused by VDPAU, right?
What else it can be?!

Best regards,

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