[FFmpeg-user] Recording logitech ultra vison,

[Sw@g]

Many thanks for your reply and assistance,

I don't really care about file size but quality, the -crf doesn't change 
anything and doesn't work without the -vpre option.



On 06/07/2011 03:44 PM, Paul Gardiner wrote:
> On 07/06/2011 15:27, Sw at g wrote:
>> Right,
>>
>> So I am still trying to get the best possible video quality, and looking
>> at the mencoder command the x264 profile is set to high - but trying to
>> use the -vpre setting doesn't work since it refer to x264 --preset, I
>> was trying to get the ffmpeg command for x264 --profile without success.
>>
>> Presets:
>>
>> --profile <string> Force the limits of an H.264 profile
>> Overrides all settings.
>> - baseline,main,high,high10
>> --preset <string> Use a preset to select encoding settings [medium]
>> Overridden by user settings.
>> - ultrafast,superfast,veryfast,faster,fast
>> - medium,slow,slower,veryslow,placebo
>>
>>
>> So any idea what is the command?
>
> -crf is what you want if you care more about quality than file size.
> If you saw no difference in the range 18-22 then perhaps you're losing
> quality elsewhere before you get to ffmpeg. Then selecting a preset
> via --preset will just alter how hard libx264 tries to compress, so
> it will affect file size while having very little affect on quality.
>
> Paul.
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