[FFmpeg-user] Recording logitech ultra vison,

[Sw@g]

Right,

so I have compile the latest git to try resolving the issue and now 
nothing work, for example the command I was using to record my desktop 
return the following errors:

[sweetth at myhost test]$ ffmpeg -s 2720x1024 -r 25 -f x11grab -i :0.0 
-acodec libmp3lame -ab 128k -vcodec mpeg4 -sameq -y -t 60 
/media/z/.cam/screen/screen_`date +%F_%T`.avi
ffmpeg version git-N-30610-g1929807, Copyright (c) 2000-2011 the FFmpeg 
developers
   built on Jun  7 2011 18:01:52 with gcc 4.6.0 20110513 (prerelease)
   configuration:
   libavutil    51.  6. 1 / 51.  6. 1
   libavcodec   53.  6. 1 / 53.  6. 1
   libavformat  53.  2. 0 / 53.  2. 0
   libavdevice  53.  1. 1 / 53.  1. 1
   libavfilter   2. 14. 0 /  2. 14. 0
   libswscale    0. 14. 1 /  0. 14. 1
Unknown input format: 'x11grab'

and while trying to capture the webcam using the mpeg4 codec or the 
libx264 then the terminal just hang:

[sweetth at myhost test]$ ffmpeg -f video4linux2 -i /dev/video0 -b 64m -crf 
22 -s 640x480 -vcodec mpeg4 -t 20  cam_`date +%F_%T`.mp4
ffmpeg version git-N-30610-g1929807, Copyright (c) 2000-2011 the FFmpeg 
developers
   built on Jun  7 2011 18:01:52 with gcc 4.6.0 20110513 (prerelease)
   configuration:
   libavutil    51.  6. 1 / 51.  6. 1
   libavcodec   53.  6. 1 / 53.  6. 1
   libavformat  53.  2. 0 / 53.  2. 0
   libavdevice  53.  1. 1 / 53.  1. 1
   libavfilter   2. 14. 0 /  2. 14. 0
   libswscale    0. 14. 1 /  0. 14. 1
[video4linux2 @ 0xa75c360] The driver changed the time per frame from 
1228/32 to 1/5

[sweetth at myhost test]$ ffmpeg -f video4linux2 -i /dev/video0 -pix_fmt 
yuv420p -s 800x600 -vcodec libx264 --preset medium -crf 18 -r 15 -t 20 
cam_`date +%F_%T`.mp4
ffmpeg version git-N-30610-g1929807, Copyright (c) 2000-2011 the FFmpeg 
developers
   built on Jun  7 2011 18:01:52 with gcc 4.6.0 20110513 (prerelease)
   configuration:
   libavutil    51.  6. 1 / 51.  6. 1
   libavcodec   53.  6. 1 / 53.  6. 1
   libavformat  53.  2. 0 / 53.  2. 0
   libavdevice  53.  1. 1 / 53.  1. 1
   libavfilter   2. 14. 0 /  2. 14. 0
   libswscale    0. 14. 1 /  0. 14. 1
[video4linux2 @ 0x9287360] The driver changed the time per frame from 
1228/32 to 1/5


Any help would be appreciated,



On 06/07/2011 04:52 PM, Paul Gardiner wrote:
> On 07/06/2011 16:35, Sw at g wrote:
>> Hi again,
>>
>> Well with " " or ` ` it doesn't work "Unrecognized option 'preset
>> medium'" only the -vpre works.
>
> -vpre is a completely different thing. You definitely need -preset. If
> that's not accepted, then it has to be that you have a version of
> ffmpeg that is too old.
>
> -vpre is just a way to provoke long lists of ffmpeg paramaters stored
> in a preset file. It is -preset that communicates to libx264. There's
> never been a time when -vpre did what -preset does now, so it will
> not help to try using it.
>
> P.
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