[MPlayer-users] exact length of a dvd title for mencoder bitrate calculations

[Dominik Szczerba]

Hey that's a nice trick. Takes time though, but it seems most reliable. 
BTW. this way the status line gives WRONG results TOO, exactly as during 
movie playback. But you inspired me to the following solution:

mplayer -ao pcm -vo null
expr `ls -l audiodump.wav | awk '{print $5}'` / 192000

which gives me the duration in seconds (assuming stereo audio) - which I 
hope (havent encoded the movie yet) is finally correct (in agreement 
with neither movie OSD nor movie/dumped_audio status line).

thanks a lot
Dominik

Fabio Papa wrote:

>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>On Thursday 21 August 2003 14:20, Dominik Szczerba wrote:
>  
>
>>[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
>>Hi,
>>
>>How do I get precise length of a dvd title? OSD gives wrong values
>>(compatible with -ss, but wrong by a few minutes), numbers I see in the
>>terminal dont help me either. How can I get the duration in secs - or
>>frames that I could divide by fps?
>>    
>>
>I use this trick: I extract an audio track with -ao pcm (specify also -vo 
>dummy, I you want it fast). This way, on the mplayer status line you'll see 
>an incrementing time. At the end of the process, you have the total playing 
>time.
>
>  
>
>>thanks a lot!
>>Domi
>>    
>>
>
>  
>


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Dominik Szczerba, Dr.
BIWI/CO-ME, ETZ F85
ETH, Gloriastr. 35
CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi
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