[MPlayer-users] RE : Re: Creating animated gif thumbnails of movies

[tom wang]

Thanks,

I tried to use framestep and I'm getting good result,
but there is something still baffling me:


I have a video file that when analyzed with 
mplayer small-DSCF1226.AVI -identify -frames 0 -vc
null -vo null -ao null -nosound
returns:
MPlayer dev-SVN-rUNKNOWN-4.1.2 (C) 2000-2007 MPlayer
Team
CPU: Intel(R) Pentium(R) 4 CPU 2.80GHz (Family: 15,
Model: 2, Stepping: 7)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1
SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE
SSE2
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to
use your remote control.

Playing small-DSCF1226.AVI.
AVI file format detected.
ID_VIDEO_ID=0
ID_AUDIO_ID=1
VIDEO:  [MJPG]  320x240  24bpp  30.000 fps  4618.1
kbps (563.7 kbyte/s)
ID_FILENAME=small-DSCF1226.AVI
ID_DEMUXER=avi
ID_VIDEO_FORMAT=MJPG
ID_VIDEO_BITRATE=4618088
ID_VIDEO_WIDTH=320
ID_VIDEO_HEIGHT=240
ID_VIDEO_FPS=30.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=1
ID_AUDIO_BITRATE=128000
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=78.00


So according to ID_LENGTH and ID_VIDEO_FPS, the video
has 30 * 78 = 2380 frames

So to get a five frames evenly spaced gif animation
from the video, I should do (if I understood
correctly)

mplayer small-DSCF1226.AVI -nosound -vo
gif89a:output=test.gif:fps=1.0 -vf framestep=595

with 595 = 2380/4

but if I do that the gif file returned is corrupted
and does not work...

I tried experimenting and this 

mplayer small-DSCF1226.AVI -nosound -vo
gif89a:output=test.gif:fps=1.0 -vf framestep=15

worked and outputed a gif animation with 5 frames, but
I have no idea where the 15 comes from

Can anybody explain me what i'm doing wrong?


Thanks



--- RC <cooleyr at gmail.com> a écrit :

> On Tue, 23 Oct 2007 02:14:17 +0200 (CEST)
> tom wang <tomawng at yahoo.fr> wrote:
> 
> > I tried to use mplayer -vo gif89a:2.0:test.gif but
> it
> > only seems to work to make an animated gif for the
> > first few frames.
> 
> See framestep
> _______________________________________________
> MPlayer-users mailing list
> MPlayer-users at mplayerhq.hu
>
http://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
> 



      _____________________________________________________________________________ 
Ne gardez plus qu'une seule adresse mail ! Copiez vos mails vers Yahoo! Mail