[FFmpeg-user] Recording logitech ultra vison,

[Sw@g]

Many thanks for your replies,

I am now installing x264 and ffmpeg from aur, will let you know the outcome


On 06/07/2011 06:39 PM, Etienne Buira wrote:
> On Tue, Jun 07, 2011 at 06:18:50PM +0100, Sw at g wrote:
>> 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'
> You need to give --enable-gpl --enable-x11grab to configure script.
>
>> 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
> For that I don't know.
>
>> [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.
> vpre was just a way to do the same thing as preset does now.
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