[PLUG-AV] UEFI talk now available

[Jason Nicholls]

The x264 encode is mono currently FYI. That's because I thought we only had
1 channel of audio! I will change it to 2 channel audio...

I'd prefer if we keep the audio in stereo too. I try and pan the audience
> mic slightly away from centre to give some separation between the two which
> give a hint as to who is speaking, and once we start adding in reverb etc
> effects we will definitely benefit with having the signal in stereo.
>
> Regards,
>
> Euan.
>
>
>
> On 07/11/12 22:45, Jason Nicholls wrote:
>
>    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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-- 
Jason Nicholls
jason at mindsocket.com.au
0430 314 857
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