[FFmpeg-user] High Quality WEBM

[jd1008]

On 12/22/2015 12:40 PM, Reindl Harald wrote:
>
>
> Am 22.12.2015 um 20:35 schrieb jd1008:
>>
>>
>> On 12/22/2015 12:32 PM, Reindl Harald wrote:
>>>
>>>
>>> Am 22.12.2015 um 20:30 schrieb jd1008:
>>>> On 12/22/2015 12:13 PM, Kirk Clemons wrote:
>>>>> That's a big help.
>>>>>
>>>>> On Tue, Dec 22, 2015 at 10:00 AM, Reindl Harald
>>>>> <h.reindl at thelounge.net>
>>>>> wrote:
>>>>>
>>>>>> Am 22.12.2015 um 18:41 schrieb Kirk Clemons:
>>>>>>
>>>>>>> Is there a recommended command for high quality webm video from a
>>>>>>> raw avi
>>>>>>> source?
>>>>>>>
>>>>>> well, there is nothing like a recommended command
>>>>>> in general it don't matter much what format the source is
>>>>>> below a log output from today
>>>>>>
>>>>>> raie the bitrate and size, that's a automated system calculation
>>>>>> pad to
>>>>>> reach target of 320x180 independent of the source
>>>>>>
>>>>>> Output #0, webm, to
>>>>>> '/www/temp/94db14123a8cba39c1715e9a806d4a342a944b34.webm':
>>>>>> [video] => /usr/local/bin/ffmpeg -hide_banner -i '/www/temp/12.m4v'
>>>>>> -y -vb
>>>>>> '384k' -ab '96k' -bt '64k' -maxrate '480k' -ar '44100' -ac '2' -r
>>>>>> '25' -vf
>>>>>> 'scale=320:176,setdar=16/9,pad=320:180:0:2:000000' -async '1' 
>>>>>> -vcodec
>>>>>> 'libvpx' -acodec 'vorbis' -strict 'experimental' -g '120' -level 
>>>>>> '216'
>>>>>> -profile '0' -qmax '42' -qmin '0' -slices '4' -threads '6' -metadata
>>>>>> 'creation_time=2015-12-22T14:30:40'
>>>>>> '/www/temp/94db14123a8cba39c1715e9a806d4a342a944b34.webm' >>
>>>>>> '/www/logs/ffmpeg.log' 2>> '/www/logs/ffmpeg.log'
>>>>>> [status] => Video '/www/temp/12.m4v' wurde in
>>>>>> '/www/temp/94db14123a8cba39c1715e9a806d4a342a944b34.webm' 
>>>>>> konvertiert
>>>>
>>>> I would like to add
>>>>
>>>> -s '1920x1080'
>>>
>>> how does 1920x1080 makes sense when your destination size is 320x180?
>>>
>>>
>> Sorry, I meant to say change 320x180 to HD of 1920x1080.
>>
>> Sometimes I type only part of what I want to say :) :)
>
> hence i said "raise the bitrate and size, that's a automated system 
> calculation pad to reach target of 320x180 independent of the source"
>
How does one calculate the optimal video bitrate for size of 1920x1080?