[FFmpeg-user] Capture from USB Dazzle: *** dropping frames

MrNice wxcvbn2006 at iol.ie
Fri Jul 31 14:57:52 CEST 2015

On 31/07/15 12:53, MrNice wrote:
> On 30/07/15 13:14, MrNice wrote:
>> On 30/07/15 12:28, Carl Eugen Hoyos wrote:
>>> MrNice <wxcvbn2006 <at> iol.ie> writes:
>>>> At this time, the output image is not good at all; 
>>>> It looks like a lot of lines are missing, white 
>>>> areas are ribbed by black lines.
>>> Is this also reproducible if you record without 
>>> audio, something like:
>>> $ ffmpeg -channel 1 -i /dev/video0 -qscale 2 out.avi
>>> ?
>>> Carl Eugen
>> Yes, same issue
> BIG new problem.
> So far I did all the tests with my laptop as player (output Y/C), the
> Dazzle and my desktop as recorder.
> I played a B&W file with a flashing square and in the same time a bip
> every second to check sync.
> I just tested with other files with colours: The output video files are
> Black and White!
> I tried with (see output below)
> ./ffmpeg -channel 1 -i /dev/video0 -qscale 2 /Store3/Test/out_`date
> +%Y%m%d_%H%M`.avi
> in the desktop or laptop, same problem.
> I am sure the output of the laptop is coloured because I test with a
> small monitor with Y/C input.
> With VLC, Capture Device, I have B&W video as well.
> Is the Dazzle dead? How to be sure?

False alert!
In fact I can get colours when the videotape player plays a tape. For
some raison the Y/C output of my laptop display colours to the external
Y/C monitor but not to the Dazzle.

So, never mind for the previous post.

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