[FFmpeg-user] Blue images from raw capture

[Yan Seiner]

Gah!  Ignore the previous message....  Sorry for the nonsense.

Yan Seiner wrote:
> Carl Eugen Hoyos wrote:
>> Yan Seiner <yan <at> seiner.com> writes:
>>
>>  
>>> ffmpeg -f rawvideo -pix_fmt yuyv422 -s $SIZE -i /tmp/video.raw -vf 
>>> yadif -f image2 /tmp/road%02d.png
>>>
>>> ffmpeg version 0.11.2
>>>     
>>
>> This is old.
>>   
> It's the newest I can build for the embedded system.  :-(
>
>
>> Since the png encoder does not support yuyv422, you have to give a 
>> hint which colourspace it should use.
>> (But that is not necessarily related to "blue", why do you think that 
>> the v4l2 input is yuyv422? Consider trying uyvy.)
>>   
> OK, some testing....
>
> Using the raw video I grabbed, ffplay plays it perfectly.
>
> ffplay -f rawvideo -pix_fmt yuyv422 -s 512x384 -i anchor
>
> If I try
>
> ffplay -f rawvideo -pix_fmt uyvy422 -s 512x384 -i anchor
>
> it looks like one of those postarized images.
>
> However, ffmpeg fails no matter what I use for pix_fmt
>
> ffmpeg -f video4linux2 -s $SIZE -i /dev/video0 -vframes $NFRAMES -f 
> rawvideo /tmp/video.raw
> ffmpeg -f rawvideo -pix_fmt yuyv422 -s $SIZE -i /tmp/video.raw -f 
> image2 -pix_fmt rgb24 /tmp/road%02d.png
>
> At least this version of ffmpeg wants you to specify both input and 
> output pixel formats to work right.
>
> Yaaay!
>


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