[MPlayer-users] BUG: sstep is broken

[Hugo González Monteverde]

Hi,

I had the same problem, one of the issues may be that your videos are 
too short...? Remember you can only seek to a keyframe. I actually have 
a box doing batch thumbnailing =) and whenever a video doesn't come out 
right I reencode it (automagically of course) with mencoder in order to 
have a keyframe every 1 s. This of course makes files huge, but as it is 
only for a tempfile from where to get the thumbnails, just works for me.

In any case I have suffered from the same number of problems with it not 
detecting EOF, but I simply calculate how many frames I should get and 
do  -frames option. I also parse mplayer -identify for knowing the 
lenght of the file in seconds.

Hope it gives some insight into your specific application, if not to the 
bug itself of course.

Hugo

Pavlos Mavridis wrote:
> Hi
> I'm using mplayer with the -sstep option to create video thumbnails and 
> I have some problems. When the player reaches the last frame strange 
> things happen.
> 
> In most cases I get repeatedly the following warning
> [mpeg4 @ 0x8480348]warning: first frame is no keyframe
> and the last frame/thumbnail keeps replicated until I manually close the 
> player.
> 
> In some other cases I don't get output at all until the playback reaches 
> the last frame, which keeps replicated until I exit the player.
> 
> To replicate the above behavior just try the following with any avi/wmv
> mplayer -sstep 100 foobar.avi
> 
> Interestingly, mpg files seems to work correcly.
> 
> Thanks
> Pavlos
> 
> ps. keep me in the cc because I'm not subscribed on the list.
> 
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