[PLUG-AV] UEFI talk now available

[Jason Nicholls]

>
> Also just for a comparison between the x264 and theora encodes, the x264
> average bitrate is 190kbps with 96kbps audio (very good quality) and video
> is almost as good as original DV at full 25fps. Perhaps there's some magic
> theora encoding options but it really just doesn't compete. It's also much
> slower at encoding than x264 as it's single threaded...
>
> It may be negligible, but we could possibly drop the audio bitrate down to
> mono 48kbps on the x264. I'm interested to know what the VP8 stuff is like
> now - its been a year since we last compared VP8 and x264.
>

We're only talking 100MB for 1hr 15mins so for x264 we don't really need to
save any more space and I really want the good quality audio :)

Yes we should do some more testing with VP8, the git version of ffmpeg on
the laptop has the VP8 codec support built in so I should be able to do
some testing.



> We need to have a workshop where we throw the video into Flumotion. We can
> define a workflow for Flumotion to do an on-site encode to a 500 kbps
> stream, and send it off-site to another Flumotion host which transcodes
> this 500 kbps stream to other protocols at this bit rate, and also at a
> much lower bit rate (100 kbps?), and possibly even an audio-only stream?
>

We'd just do on-site encoding to x264 since the laptop is able to do that
at approx 4x real-time. That's a 190kbps stream for full quality
everything. Off-site we could use Flumotion to re-encode and provide other
options if necessary.

I'm a bit slammed the rest of this week so I will plan to do some VP8
testing next week and take a peek at flumotion.



Jason Nicholls
jason at mindsocket.com.au
0430 314 857
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