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List:       mjpeg-users
Subject:    Re: [Mjpeg-users] [Fwd: Re:  where is xlav?]
From:       Bernhard Praschinger <shadowlord () utanet ! at>
Date:       2009-11-14 16:41:51
Message-ID: 4AFEECAA.9020208 () utanet ! at
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Hallo


Christian Ebert wrote:
> * Bernhard Praschinger on Thursday, November 12, 2009 at 19:05:47 +0100
>> I have tired that command:
>> mencoder DVD.mpg -o test4.avi -oac copy -ovc lavc -lavcopts 
>> vcodec=mjpeg:vbitrate=15000
>>
>> There mplayer tells me that I have used a MJPG coded. But it seems to me 
>> that they don't include a huffman table or at least in a different way. 
>> And I haven't looked at the source so I can't tell exactly what's wrong.
> 
> Another stab in the dark; perhaps force a format. From man
> mencoder for -lavcopts:
> 
> 
>        format=<value>
> 		 YV12
> 		      default
> 		 444P
> 		      for ffv1
> 		 422P
> 		      for HuffYUV, lossless JPEG, dv and ffv1
> 		 411P
> 		      for lossless JPEG, dv and ffv1
> 		 YVU9
> 		      for lossless JPEG, ffv1 and svq1
> 		 BGR32
> 		      for lossless JPEG and ffv1
That's bad because the mjpeg-tools need 4:2:0 subsampling.

> mencoder DVD.mpg -o test4.avi -oac copy -ovc lavc \
> -lavcopts vcodec=mjpeg:format=422P:vbitrate=15000
> 
> ? ... ok, I better shut up, because I have no experience at all
> with mjpeg codec.
That's no problem. You won't want to know how much/less experience I 
have.

auf hoffentlich bald,

Berni the Chaos of Woodquarter

Email: shadowlord@utanet.at
www: http://www.lysator.liu.se/~gz/bernhard

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