[FFmpeg-devel] Option To Change Block Size

Benjamin Larsson banan
Sun May 11 12:52:21 CEST 2008

Michael Niedermayer wrote:
> On Sat, May 10, 2008 at 06:30:42PM -0700, Mike Melanson wrote:
>> Hi,
>> In experimenting with ZMBV, I have found that different block sizes 
>> produce better results for different types of videos. Right now, 
>> changing block size entails changing code and recompiling. Is there a 
>> command line option that would allow me to pass the block size into the 
>> encoder? I couldn't find anything and I thought I would ask before I 
>> added the option myself.
> Why would we want an option to set the block size?
> I mean the fact that different block sizes are better for each video means
> the user can only use trial and error for each file. But that can be done
> automatically faster and better ...
> A 2 pass mode which selects the best block size for each group of pictures
> (keyframe and the following frames) seems to be the obvious thing to do.
> [...]

I need that for the flashsv encoder also. But I was to lazy to implement it.

Benjamin Larsson

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