From: Paul Ellis <[EMAIL PROTECTED]> Subject: Re: some questions about encoding that I've been having a Yvan, Here's some more answers. > >2) Does the "Inverse Telecine" setting in RealProducer 7.0 really yield > >better quality results when encoding video that's been converted from 24fps > >film? Or is it harldy worth the effort? (I've heard mixed reviews) Inverse Telecine does make a distinct difference because it removes unnecessary frames and can spend more bits on the real frames. However, the filter is not used (even when the option is checked) when your input is less than 30 fps or your maximum framerate in the Target Audience Settings are less than 30 fps. Perhaps this is causing some confusion in situations where the filter isn't being used and therefore the results don't look any different. > >3) I typically capture my video at 320x240, and then resize it to 176x132 > >in realproducer while encoding. Is there any kind of anti-aliasing filter > >that I can install/apply (either while capturing or encoding) that would > >either eliminate or minimize the hideous aliasing effect that I get when > >reducing the video down to a small frame size like that? Use the High Quality Resize filter to improve the scaling quality. This is found in the Preferences dialog on the Video Filters tab. The default is Fast Resize. -Paul At 10:31 AM 4/14/00 -0700, RealForum wrote: >From: David Wheeler <[EMAIL PROTECTED]> >Subject: Re: some questions about encoding that I've been having a > difficult > >Hi Yvan, > >I can provide some of these, > >At 02:32 PM 4/13/00 -0700, you wrote: > >time getting answers to > >Sender: [EMAIL PROTECTED] > >Precedence: bulk > >Reply-To: [EMAIL PROTECTED] > > > >From: "Yvan Gagnon" <[EMAIL PROTECTED]> > >Subject: some questions about encoding that I've been having a difficult > >time getting answers to > > > >1) Is there any real benefit to using an external timebase corrector when > >using either VHS, SVHS, Mini DV, or DVCAM formats as the source? Don't > >these consumer brand decks have their own built-in timebase correctors? If > >they typically DON'T have them built in, .. are there any TBCs that use > >svideo ins/outs, and if so, which brands/models are best recommended? > >Time base correctors are generally used in professional video on playback >decks in a system that is timed to house sync. They commonly have H and SC >phase adjustments and picture controls. Consumer equipment would not fit >into this use and a TBC on a VCR only feeding a monitor would not be >useful. If you need a TBC in your capture system and your capture card is >genlockable there are products out there but they are expensive, a couple >thousand dollars. You can view products at www.bhphotovideo.com or at any >professional video reseller. I would also not use VHS as a source in general. > > > >2) Does the "Inverse Telecine" setting in RealProducer 7.0 really yield > >better quality results when encoding video that's been converted from 24fps > >film? Or is it harldy worth the effort? (I've heard mixed reviews) > > > >3) I typically capture my video at 320x240, and then resize it to 176x132 > >in realproducer while encoding. Is there any kind of anti-aliasing filter > >that I can install/apply (either while capturing or encoding) that would > >either eliminate or minimize the hideous aliasing effect that I get when > >reducing the video down to a small frame size like that? > > > >4) I'm currently using a PIII 500 mhz machine w/256 mb pc100 ram, 2 fast > >ultra-wide scsi-2 HDs, and an Osprey 100 video capture board as a desktop > >video workstation (running Windows NT Workstation w/SP 5). I am able to > >capture uncompressed AVIs with cd quality audio at 15fps pretty reliably, > >.. however, .. I drop about 1 frame every 60 seconds on average. Could > >anyone suggest any tweaks to the OS that I could apply to improve > >performance and eliminate the frame dropping? > >You should have no problem capturing at 15pbs and 320x240, have you tried >the latest drivers? > > > >5) Is there an external piece of hardware/equipment that I could purchase > >that I could connect in between my video source and video capture board > >that would allow me to control or enhance the video quality somehow? If > >so, what's most recommended? (I know that there's the abilty to control > >brightness/contrast/hue, etc. in the Osprey 100 driver control panel, > >... but I'd prefer an external device of some sort that has some more > >features.) > >There are several, we use processing amps from Kramer, again check the B&H >catalog. > > > >6) Does the Osprey 1000 board NOT support high bitrate encoding? What > >would be the benefit (if any) of using a hardware based encoder like that, > >aside from being able to install and use multiple boards simultaneously in > >one machine? Does it just make really nice quality low bitrate realvideo > >or something? Better than the Osprey 100?? > >For surestream encoding we still recommend osprey 100, CPU and RAM as much >as you can get. > > > >7) Which video capture boards work with RealProducer 7.0 on the Windows NT > >platform? Is there a page on the real.com site that lists all of them, > >perhaps? And which of these yield the best quality results? > > > >Many thanks, > > > >- [EMAIL PROTECTED] > ******************************************************* The RealForum is an email discussion group focused on using RealNetworks products. The RealForum is a place to post messages about the best methods for creating content using RealNetworks technologies and the planning and implementation of streaming-media web sites. 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