[MEncoder-users] flv encoding problem

[Axel Huizinga]

Tripp schrieb:
> --- Axel Huizinga <axel at 3drachen.de> wrote:
>
>   
>> Corey Hickey schrieb:
>>     
>>> Axel Huizinga wrote:
>>>   
>>>       
>>>> Hi,
>>>> hope anyone has an idea how to solve my pixelation problem.
>>>> Converted my avi video with
>>>> ffmpeg -i /tmp/0001_0301.avi -y -vcodec flv -b 100k   -f flv
>>>>         
>> starlogo.flv
>>     
>>>> the output runs smooth via     mplayer
>>>>         
>> http://enerstar.de/starlogo.flv
>>     
>>>> but while playing it in a swf flvplayer there appears some
>>>>         
>> pixelation:
>>     
>>>> http://enerstar.de/videoScreen.php?movie=videoPlayer.swf
>>>>     
>>>>         
>>> ...looks about the same to me...
>>>
>>> I think the difference is that your swf player is displaying the
>>>       
>> first
>>     
>>> frame for a moment while it buffers (or something) and the first
>>>       
>> frame
>>     
>>> looks quite ugly.
>>>
>>> $ mplayer starlogo.flv -vo png -frames 1 && display 00000001.png
>>>
>>> I expect that you'll get better results with 2-pass encoding and
>>>       
>> some of
>>     
>>> the higher-quality options of ffmpeg/mencoder: mbd=2, trell, etc.
>>>   
>>>       
>> Hi Corey,
>> the ffmpeg options are quite complex - so if you're still interested
>> I 
>> put the avi online at
>> http://enerstar.de/starlogo.avi
>>
>>     
>
> the avi is already shot,
> with a bad first frame, and fairly jittery motion.
> plus it's mpeg2 in avi
> ??
>
> anyway...
>
> i have a useful ffmpeg commandline 
>
> ffmpeg -i starlogo.avi -pass 1 -qcomp 0.65 -qmax 21 -qdiff 3 -an 
> -vcodec flv -b 175K -g 160 -mbd 2 -cmp 3 -subcmp 3  -flags 
> +aic+cbp+mv0+mv4+trell -sc_threshold 8000 -y outfil5.flv
>
> ffmpeg -i starlogo.avi -pass 2 -qcomp 0.65 -qmax 21 -qdiff 3 -an
> -vcodec flv -b 175K -g 160 -mbd 2 -cmp 3 -subcmp 3  -flags 
> +aic+cbp+mv0+mv4+trell -sc_threshold 8000 -y outfil5.flv
>
> which will output the same size as your sample,
> but you'll want to start with a better source,
> upping bitrate is most times the best solution,
> filtering is a fair idea to consider.
>
> i have a mencoder command for flv somewhere too.
>
> tripp
>
>
>
>
>       
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>   
Hi tripp,
your commandline was very useful regarding the quality issue.
started with a new avi directly generated from blender output
the result is quite ok http://enerstar.de/videoScreen.php?movie=loader.swf

Axel