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HD .OGV (ogg) conversion

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sean miller
HD .OGV (ogg) conversion
on Jun 27, 2013 at 2:52:46 pm

Anyone know of a good way to convert .mp4 footage into ogv? The only free solution I could find was Miro video converter

It produces really bad results, however I did find that this helped:



"In this directory/Terminal:
cd /Applications/Miro Video Converter.app/Contents/Resources/lib/python2.7/mvc
Edited this file:
open -e basicconverters.py

After these lines:
class OggTheora(converter.FFmpegConverterInfo):
media_type = 'format'
extension = 'ogv'
I replaced:
parameters = '-f ogg -vcodec libtheora -acodec libvorbis -aq 10'
With:
parameters = '-f ogg -vcodec libtheora -c:v libtheora -c:a libvorbis -q:v 4'

Then ran python -m compileall . in that directory in Terminal.app.

Then I quit and re-started the Miro Video Converter.app ... Now I get better quality OggTheora ...
(I actually also replaced ffmpeg in the Helpers dir with my own binary, but I don't think mattered, as I had the same problem until I changed the config.)"



Although there are still no real options for customising quality... anyone know of a good alternative?

Thanks


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Rafael Amador
Re: HD .OGV (ogg) conversion
on Jun 27, 2013 at 3:20:21 pm

I found a couple of things.
A QT Component:
http://xiph.org/quicktime/

And a self contained application:
http://v2v.cc/~j/SimpleTheoraEncoder/


I found that, going from here:
https://en.wikipedia.org/wiki/Ogg
to here:
https://commons.wikimedia.org/wiki/Help:Converting_video
Then here:
http://wiki.xiph.org/TheoraSoftwareEncoders
I hope they work for you.
rafael


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sean miller
Re: HD .OGV (ogg) conversion
on Jun 28, 2013 at 12:58:34 am

Thanks the quicktime component worked perfectly


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Rafael Amador
Re: HD .OGV (ogg) conversion
on Jun 28, 2013 at 3:05:53 am

You see?
Both have learnt something new.
I've never heard of that kind of files or those applications.
Google search engine rocks!!
rafael


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