[MPlayer-users] thumbnail from a SWF / VP6

[Ivan Kowalenko]

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On Feb 7, 2007, at 11.39, junk wrote:

> thanks for the response.  as i understand it, SWF is all key  
> frames, it's not like an FLV where there are key frames and  
> interframes, but i could be wrong.  i took a sample of 20 frames  
> and they're all equally scrambled.  any thoughts?

Not sure. I'll have to check if VP6 is all keyframe or not, but  
either way, this doesn't seem to be the likely culprit. Try playing  
the video back, and skip around. Is the output garbled too? Also, can  
you give us your MPlayer output?

>> It's possible that the frame you're skipping to isn't a key  
>> frame,  and thus doesn't have a full picture to decode. Try taking  
>> a sample  of about 10-20 frames, see if you can get a decent frame  
>> out of any  of them.
>
>
>>>
>>> mplayer someVideo.swf -ss 60 -frames 2 -vo jpeg
>>>
>>> i take 2 frames because the first one is always the first frame  
>>> of  the video, the second is the desired frame at the specified  
>>> seek  time. however, the output of the second frame is always  
>>> scrambled,  seems it has been processed incorrectly. the SWFs are  
>>> encoded in  VP6 .  as far as i can see, mplayer has a VP6  
>>> decoder, so i'm not  sure why this is happening.  is there  
>>> something i'm missing?
>>
>> i'm using mplayer on fedora core 5.  i have SWF videos, encoded  
>> in  VP6.
>>
>
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> MPlayer-users at mplayerhq.hu
> http://lists.mplayerhq.hu/mailman/listinfo/mplayer-users

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