[mythtv-users] m2ts files and the internal player

1.41421 at gmail.com 1.41421 at gmail.com
Mon Feb 21 01:26:31 UTC 2011

>> From: "JCA" <1.41421 [at] gmail>
>> When I play those files directly from my camcorder, connecting it to
>> my TV through an HDMI cable, the images are always crisp and sharp, in
>> particular when they depict transversal motion - eg when the footage
>> features somebody walking from one side of the screen to the other.
>> When I play the files with MythTV's internal player, in the situation
>> described above one can observe a slight blur; it's as though the
>> image could not be refreshed fast enough, or something like that (I am
>> not at all video-savvy.)

>> Has anybody observed things like this? Any suggestions on how to fix
>> it? The internal player can play 1920x1080 videos without such
>> artifacts, for I got a number videos created from commercial Blue-Ray
>> disks that play flawlessly.

> Have you tried playing them using mplayer or such on the MythBox?

Not yet.

> 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
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? My TV is definitely  
1080p anyway.
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