[FFmpeg-user] Recording logitech ultra vison,

[Sw@g]

Right,

I remove all those git version to re-install rep version, and strangely 
enough the -preset & -profile command are still working - they weren't 
previously.

but the quality is still rubish compare to the mencoder command (issue 
with mencoder and the kernel, and the fact it isn't maintain any more 
force me to change)

See mencoder command use previously:

mencoder tv:// -tv 
driver=v4l2:width=800:height=600:fps=15:device=/dev/video0  -ovc x264 
-nosound -o cam_`date +%F_%T`.avi


On 06/07/2011 07:36 PM, Lou wrote:
> On Tue, 07 Jun 2011 19:27:28 +0100
> "Sw at g"<sweetthdevil at gmail.com>  wrote:
>
>> well it did, now the command ffmpeg -f video4linux2 -i /dev/video0
>> -pix_fmt yuv420p -s 800x600 -vcodec libx264 -preset medium -profile
>> high -crf 18 -r 15 -t 20 cam_`date +%F_%T`.avi
> You should use something other than avi for your output (such as mkv or
> mp4) if you're going to use libx264. If you require avi, then don't use
> b-frames.
>
> -pix_fmt yuv420p and -profile high are probably redundant. Consider
> adding -threads 0.
>
>> works, but I cannot open it, I suspect is because x264-git isn't link
>> and gnome-mplayer doesn't see the codec.
> Either compile MPlayer, or remove x264-git and ffmpeg-git and use the
> versions from the repository. Your command would work with the
> repository packages.
>
>> regards,
>>
>> On 06/07/2011 07:24 PM, Lou wrote:
>>> On Tue, 07 Jun 2011 19:07:10 +0100
>>> "Sw at g"<sweetthdevil at gmail.com>   wrote:
>>>
>>>> Right,
>>>>
>>>> me again, installing ffmpeg-git from aur didn't change any
>>>> outcome, I
>>> What outcome? You didn't show your command and the complete output.
>>>
>>>> am now recompiling the latest git with  ./configure --enable-gpl
>>>> --enable-libx264 --enable-x11g is there any other option I should
>>>> add?
>>> ffmpeg-git and ffmpeg from the repository already use these options.
>>> Re-compiling probably won't help you.
>>>
>>>> regards,
>>>>
>>>> On 06/07/2011 06:50 PM, Sw at g wrote:
>>>>> 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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