[MPlayer-users] mjpeg playback solid green

Kichigai Mentat kichigai at comcast.net
Mon Sep 5 07:02:21 CEST 2005


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On Sep 4, 2005, at 18.47, Steven M. Schultz wrote:

> On Sun, 4 Sep 2005, Kichigai Mentat wrote:
>
>
>>>     On an OSX 10.4.2 system when I play back a MJPEG-A file all that
>>>     appears is a window of solid (bright/lime) green.
>>>
>
>
>> Well, you're not alone here. I've had the same problem, but there
>> could be differences between our cases. Where did you get this video
>> from? Is it possible we could have a sample?
>>
>
>     Friend in Austria sent it to me (as some PAL MJPG test data).
>
>     But it's easy to create/generate a file.  I believe ffmpeg can  
> encode
>     to mjpeg.  If you have mjpegtools (and y4mscaler) available then
>     this:
Well, if FFMPeg is making the file, it should be able to play it  
back. Can you check to see which decoder MPlayer is using when  
playing back that MJPEG video file?
>
> y4mcolorbars -S 444 -n 75 -W 720 -H 576 -F 25:1 -A 59:54 -I t | \
>     y4mscaler -O chromass=422 | \
>     yuv2lav -f a -b 512 -I 1 -q 90 -o cbars.avi
>
>     will generate a MJPEG file with 3 seconds of colorbars.  Playing
>     that back with mplayer gives the same bright green (with a bit of
>     corruption on the last couple lines) screen.
>
>     I could upload the 'cbars.avi' file if it's needed (about 2MB)  
> - where
>     would be a good place to put it?
>
>     Steven Schultz
>
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>

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