[mythtv-users] m2ts files and the internal player

[Derek & Cindi Cass]

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org [mailto:mythtv-users-
> bounces at mythtv.org] On Behalf Of Jay Ashworth
> Sent: Sunday, February 20, 2011 8:47 PM
> To: Discussion about MythTV
> Subject: Re: [mythtv-users] m2ts files and the internal player
> 
> ----- Original Message -----
> > Me:
> > > It sounds to me, off-hand, like something de-interlacing that's not
> > > supposed to be (I assume your monitor and camcorder are both
> > > 1080p?).
> >
> > > Alternatively: your camcorder may only be 1080i, and while, when
> you
> > > connect it directly to the TV set, the *TV* switches to 1080i and
> > > everything looks fine, if you play the same clip through Myth, it
> > > will
> > > de-interlace it, because it's keeping the monitor in 1080p.
> >
> > > Try playing such a clip from mplayer *on the commandline*; it will
> > > tell
> > > you in STDOUT what the format of the video is. I'm betting 1080i.
> >
> > Well, I am pretty sure that my camcorder (Canon VIXIA HFS20) is
> 1080p.
> > Also, when running mplayer on it this is what I get:
> >
> > MPlayer 20100218-4.4.3 (C) 2000-2010 MPlayer Team
> >
> > Playing All.m2ts.
> > TS file format detected.
> > VIDEO H264(pid=4113) AUDIO A52(pid=4352) NO SUBS (yet)! PROGRAM N. 1
> > FPS seems to be: 29.970030
> >
> =======================================================================
> ===
> > Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> > Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
> >
> =======================================================================
> ===
> >
> =======================================================================
> ===
> > Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
> > AUDIO: 48000 Hz, 2 ch, s16le, 256.0 kbit/16.67% (ratio: 32000-
> >192000)
> > Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3)
> >
> =======================================================================
> ===
> > AO: [oss] 48000Hz 2ch s16le (2 bytes per sample)
> > Starting playback...
> > Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
> > VO: [xv] 1440x1080 => 1920x1080 Planar YV12

I think that the above means that you have recorded this clip in 1440x1080,
which would be interlaced.  I have an older camcorder that only records in
1440x1080i60, and I have the exact same output as you do in mplayer.  I see
that your camcorder is capable of 1920x1080p24/30, but it also shoots in
1440x1080i60; are you sure that you are recording in the higher resolution?

My guess is also that Myth is deinterlacing the content here.

> > A: 601.3 V: 600.6 AV: 0.712 ct: 0.142 45/ 45 57% 15% 32.0% 11 0
> > Exiting... (Quit)
> >
> > How can I tell from this whether it is 1080i or 1080p?
> 
> I *think* the answer to that is the frame rate; 1080p is 30, 1080i is
> 60...
> but I don't see that mplayer shows that.  Damn.
> 
> Wait; there it is.  Yeah, 1080p30.
> 
> >                                                          My TV is
> > definitely 1080p anyway.
> 
> Are you certain it's *in that mode*, though?  Does it tell you, or does
> your xorg.log tell you?
> 
> Cheers,
> -- jra
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