[Kdenlive-devel] capturing

[Reinhard Amersberger]

kdenlive-devel at lists.sourceforge.net schrieb am 25.03.04 18:07:36:
> 
> On Thursday 25 March 2004 11:36, Reinhard Amersberger wrote:
> > hhmm ... I don't know how avid is handling this internally, but you can do
> > all this with avid's capture cool ...
> 
> As I said, you a free to remove anything after you captured but I really don't 
> see  the benefit in doing this during the capture process. I don't know avid, 
> but I anm certain, that they are not able to capture without sound. And even 
> if they remove the sound from the DV frame, the filesize would be the same. 
> Most likely they save an AVI file and attach (or don't attach) a seperate 
> sound track which contains the audio which is also entangled in the DV frame.
> 
> > but then there will be (sometimes) a lot of unused footage remaining on
> > harddisk, what should be avoided if possible IMHO ... although I know that
> > harddisk capabilities are pretty cheap to purchase at the moment ;-)
> 
> A PAL DV frame is 144000 byte. With or without audio doesn't matter. You don't 
> save a single byte if you remove the audio. You overwrite it with zeros.
> 
> >> just an example:
> > some time ago I had to capture footage from an old hi-8 camcorder having
> > just one audio track (conversion to dv was done by an external analog2dv
> > converter == dazzle hollywood bridge). So why capturing an audio track with
> > no sound?
> 
> PLease try it out yourself. Capture raw dv with and without audio. The 
> filesize is _exacly_ the same. I would be intersted if not. (I don't know the 
> DV spec that well)

ok, I checked this and avid creates separate files for video and audio. 
this means: when capturing video and audio1/2 this results in having three files on hd; 1 containing the video footage and 2 others containing audio and when only 1 audio channel will be captured, then there is also just 1 audio file on hd.
So the problem seems to be that this files can't be used by other apps without having a special import functionalllity.
Maybe there is a benefit doing it this way ...  maybe a better performance ??



> > So, just another suggestion, why don't you guys install avid on your
> > machines to check out some of this features?
> 
> That would mean to boot windows which inflicts physical pain to my spine.
> 
> Cheers, Rolf



:-)  this means you don't use movie dv any longer?

greetings
Reinhard