[MPlayer-users] How to grab two different frames at 1 and 2seconds.

[PaulM]

Hi Dave,

Thanks for the reply. I took a look at  -hr-edl-seek but it is not entirely 
clear for me.
How can I use it from command line to make mplayer seek for the exact 
position?

Thanks,

Paul.


----- Original Message ----- 
From: "DaveG" <mplayer01 at dgmm.net>
To: <mplayer-users at mplayerhq.hu>
Sent: Sunday, October 28, 2007 1:02 AM
Subject: Re: [MPlayer-users] How to grab two different frames at 1 and 
2seconds.


On Saturday 27 October 2007, PaulM wrote:
> I need to extract two or more different jpeg frames from a video file.
> I'm trying to run this:
>
> mplayer -frames 2 -vo jpeg -ss 00:00:01 -nosound video.avi
> this:
> mplayer -frames 2 -vo jpeg -ss 00:00:02 -nosound video.avi
> this:
> mplayer -frames 2 -vo jpeg -ss 00:00:03 -nosound video.avi
> and this:
> mplayer -frames 2 -vo jpeg -ss 00:00:04 -nosound video.avi
>
> I assume I should get 4 different frames at positions 1,2,3 and 4. But
> that's wrong. For some reason I got the same frames which are absolutely
> equal. I got a different frame starting from 5th second only. Why is it 
> so?
> Why mplayer generates identical frames for the first 4 seconds? How can I
> get different frames?

IIRC you can't do frame accurate stuff like that so it's grabbing the frames
from the nearest keyframe.

Someone will probably be along shortly with the correct answer but IIRC 
there
is something for high resolution seeking, something to do with EDL?

Yeah, just had a look at man mplayer and found -hr-edl-seek.  have a look at
it and see if it's what you need.

-- 
Dave
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