[MPlayer-users] Re: Getting info from mplayer for semi-automatic encoding script

[Michael Waters]

On Thu, Jun 05, 2003 at 14:37 +0800, Neilen wrote:
...
> Right now, I need to get the time length of a movie file. When I use
> mplayer -identify on avi files, the ID_LENGTH field seems to give me the
> expected result.  
> 
> On DVDs, however, the value is always too low. It does seem to be
> proportional to the movie length, however. If on a given DVD I say
> (using the latest mplayer 0.9 release)
> 
> mplayer -identify dvd://3, I get (snipping everything before the ID_*
> fields)
> 
> ID_FILENAME=DVD title 3
> ID_VIDEO_FORMAT=0x10000002
> ID_VIDEO_BITRATE=8000000
> ID_VIDEO_WIDTH=720
> ID_VIDEO_HEIGHT=480
> ID_VIDEO_FPS=29.970
> ID_VIDEO_ASPECT=1.3333
> ID_AUDIO_CODEC=a52
> ID_AUDIO_FORMAT=8192
> ID_AUDIO_BITRATE=384000
> ID_AUDIO_RATE=48000
> ID_AUDIO_NCH=2
> ID_LENGTH=4559
> 
> The real length of the DVD is, however, on the order of 6000s.

I've noticed mplayer gives the wrong length too. I use lsdvd:
http://sourceforge.net/projects/acidrip/ .

> I have also noticed that the -ss command makes the same mistake when it
> is used to seek to a start position in a DVD. ie. seeking to -ss 4550
> will put me near the end of the movie, but the playing time shown is
> about 6010s...

...would be nice if -ss worked for dvds but in my experience, it
doesn't.  :(

Michael