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Posted by Smarty on 10/05/71 11:38
Glad to help Paul. iMovieHD does buffer the incoming video from the HDV
camcorder and process it as quickly as the processor(s) permit. On my wife's
MacMini the HDV is captured at about .5X of real time. On my dual G%
Powermac the capture is at normal real time. The software scales itself
beautifully to the hardware.
Incidentally, the new iMovieHD released a couple weeks ago at MacWorld (as
part of the new iLife 06 package for $69) now also does complete real time
transition, title, and effect / filtering rather than the older versions
which required rendering. This also scales to the hardware beautifully.
Smarty
"Paul Hoadley" <paulh@logicsquad.net> wrote in message
news:1138361629_29@pnews.internode.on.net...
> On 2006-01-27 09:45:44 +1030, "Smarty" <nobody@nobody.com> said:
>
>> I'm really not so sure the disk is indeed the bottleneck.
>>
>> Since normal DV capture has exactly the same data rate as HDV, and is
>> captured correctly by Paul's system, I am much more suspicious of the CPU
>> and / or perhaps the bus speed of his PC.
>
> Good point.
>
>> The codec has a lot more work to do in encoding the incoming HDV stream,
>> and this is where the CPU and bus are probably the issue.
>
> It certainly looks like this is the issue for me. I downloaded the free
> trial of the Aspect HD plugin by Cineform, and although I've only had time
> to do a bare minimum of testing, this seems to allow my 2.8 GHz P4 to
> capture HDV without a problem. Presumably the codec in Premiere Pro's
> 1.5.1 update is more of a CPU hog. (Of course, it may well be the case
> that it's also a better codec, but at this point I'm happy just to capture
> the HDV at all.)
>
>> I've been doing HDV editing on both the PC and Macs for quite some time
>> now, and some of the capture software works a lots better and does permit
>> non-real time buffering if the CPU can't keep up.
>>
>> As Paul indicates, iMovie HD on the Mac does an amazing job, and slower,
>> older Macs like the G4 / G5 laptops or my wife's MacMini seem to capture
>> HDV and edit it quite adequately.
>
> I assume that iMovie HD is buffering the data to disk while it encodes in
> the background---that is, when it claims to be capturing at "1/2 real
> time" speed (or slower), it's not actually reducing the transfer rate from
> the camera. I don't see an option to make Premiere Pro 1.5.1 do this,
> though I assume that the Aspect HD plugin is doing just this.
>
>> The closest consumer HDV editing program I have found which seems to work
>> well on slower, older PCs in Ulead's Video Studio 9.
>>
>> Cycberlink's new version of Power Director is also quite good in this
>> regard, but is a bit buggy, as is Ahead Nero Vision in its' latest HDV
>> editing and capture.
>>
>> If someone is forced to use a slow PC, then I would stick with Ulead VS9
>> despite its' limited feature set. Like iMovieHD for the Mac, it works
>> well and quickly.
>
> Thanks for the advice.
>
>
> --
> Paul.
>
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