[MPlayer-users] Always extracting first frame, position seems to be ignored...

[The Wanderer]

Nelson COELHO wrote:

> Hello,
> 
> I am new here, excuse if my question is out of purpose.
> 
> Well, I'm trying to get an image at a given position but MPLayer
> always extract first frame of the video...
> 
> Do you know what is wrong ? I'm using MPlayer 1.0pre8-3.4.2 on
> Windows XP 32 bits.

What is wrong is that you are using a highly outdated version of
MPlayer. There is an official release more recent than 1.0pre8; for that
matter, it is recommended to use the latest development version rather
than the official release.

> Here is the commandline :
> 
> mplayer -ss 00:20:00 -vo jpeg -frames 1 "c:\temp\mplayerTools\avi_sample.avi"
> 
> mplayer should extract frame at 20 seconds, isn'it ? But I get the
> frame of the beginning of the video...

For a long time, there was a bug such that MPlayer would always give the
first frame of the movie first. If you use '-frames 2', then you should
get the first frame of the movie and the frame at 20 seconds.

This bug has, I seem to recall, been fixed. However, I do not think that
the fix was long enough ago that it would be included in the most recent
official release, 1.0rc1. If you want the fix (and many other
improvements!), you will need to obtain a copy of the latest development
source tree and compile it yourself. This will also help you if you want
to get help with MPlayer or MEncoder on these mailing lists.

-- 
       The Wanderer

Warning: Simply because I argue an issue does not mean I agree with any
side of it.

Secrecy is the beginning of tyranny.