[FFmpeg-user] New options -preset and -tune for x264 encoding

[Baptiste Coudurier]

Hi,

On 04/19/2011 08:56 AM, sean darcy wrote:
> On 04/16/2011 08:10 PM, Baptiste Coudurier wrote:
>> Hi everyone,
>>
>> Latest git has now added 2 new options for libx264 encoding:
>> -preset<preset>
>> -tune<tune>
>>
>> These options are directly mapped to internal tune and presets within
>> libx264. The old presets files have been removed, please use the new
>> options.
>>
>> Best regards.
>>
> How do these new presets work with 2 passes?
> 
> For instance, I have a script that used:
> 
> -pass 1 -vpre slow_firstpass
> 
> -pass 2 -vpre slow
> 
> I've changed it to:
> 
> -pass 1 -preset slow
> 
> -pass 2 -preset slow
> 
> I used to get 100 fps on the 1st pass, now about 70. Is this to be
> expected? Or do I need to do something else on the 1st pass?
> 
> Here's the full script:
> 
> ffmpeg -i $INPUT -an -pass 1  -vcodec libx264 -level 30 -preset slow     \
>        -bufsize 10000000 -maxrate 10000000 -b 1200k -threads 0 -f mp4 -y
> /dev/null
> ffmpeg -i $INPUT -an -pass 2  -vcodec libx264 -level 30 -preset slow
> -timestamp now \
>        -bufsize 10000000 -maxrate 10000000 -b 1200k -threads 0 $1.m4v

fastfirstpass should be enabled by default.
Can you please double check that the parameters printed are the same ?

-- 
Baptiste COUDURIER
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