[x264-devel] Cycles for X264

[Zubair Ali Khan]

Thanks Jason
Ultrafast gets about 3x improvement over fast. What are the trade offs. 
I guess video quality right?
Zubair

On 06/08/2010 02:33 PM, Jason Garrett-Glaser wrote:
> On Tue, Jun 8, 2010 at 7:32 AM, Zubair Ali Khan<zkhan at d2tech.com>  wrote:
>    
>> Hi all,
>>
>> I am running X264 on ARM Snapdragon processor (similar to Cortex-8). It
>> seems to be taking quite a bit of cycles.
>>
>> For example, each call to encode will consume average 100 million cycles,
>> limiting the frame rate to 5 frames per second on this processor. My
>> expectation was average 15 million cycles per call. Am I expecting too much
>> or is it some configuration issue?
>>      
> Cortexes, despite being fast for an ARM, are in fact not very fast
> compared to desktop processors.  You may have to use "ultrafast" or
> "superfast" to get reasonable performance.
>
> Dark Shikari
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>    


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