I'm getting great keying results from Cinegob

but the preview speed is quite slow – especially with HD files which are slower than realtime

also rendering is excrutiatingly slow (hours for a 7 minute file)

I've installed Avisynth and I'm using dul core 2.66ghz processor –

should it be this slow?

Mick West

by the way this forum software is also horribly slow

Thanks for your reply – I fully understand there is a lot of work being done

I've found that if I limit the resolution to say 720x576  things become more tolerable

I personally don't really need the rotoscoping option- in fact, a version just  with the "colour difference" tab would be fine for me

The main problem I'm having now is how do I render the output without saving massive files

especially If I save RGB+Alpha ,single AVI file- a 4 minute file exceeds 4gb and gets all muddled up

- even at the lower resolution a 16 second file saving with the "preview" output setting is about 500mb

- yet I can convert /re-save this to about 20mb with no obvious lack of quality

I get compression options with the render dialogue but none of these seem to work – I get baffled by the codecs thing – I don't know how to check which codecs are installed with windows – although some programs seem to work fine

If anybody could explain to me how to just have a few useful codecs installed and available I'd be very grateful

You can tell I'm not very good with the technicalities of video – but I'm really struggling here – I'm getting excellent keying results – but finding it hard to save the output in a useful format

There also seems to be a bug when re-saving to an existing filename – the existing size is retained instead of being overwritten

many thanks for any help received

Mick

OK I tried the Divx codec for RGB+Alpha – it saved a slightly larger file (still quite small) but doesn't seem any different

probably need to alter some settings

I've also looked at the Xvid and ffd codecs – they have loads of settings but nothing I really understand

Can anybody tell me if these codecs support the RGB+Alpha setting – if so – how do I set them??

regards

Mick

Thanks Bo

I've tried HuffYuv and it didn't seem to work – and Lagarith looks too complicated

I haven't got the time or inclination to go into intense studies of technicalities  – i'm just trying to make some videos of my music

anyway i've given up on rendering with alpha channel and decided to render using the "preview" setting

which at least gives me a consistent background colour for chromakeying in my editor

however I've now got another problem – but I've started this in a new topic "aspect ratio problems"

regards

Mick