Kelly Grannell
DIS Veteran
- Joined
- Feb 26, 2005
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Disney8704 said:Yes most only record 30 mins but there are mini dvds that do record 60 mins worth. I dont know who all sells them but I know Panasonic does at best buy. Besides the DC40 can do LP and can record up to 60 mins on a 30 min disc, and 120 mins on a double sided disc. I got this from the main canon website:
The DC40 digital camcorder gives you all the convenience and functionality of DVD technology, which includes a wide array of options for shooting and sharing your video. Only 3" (8cm) in diameter, the DC40's DVD -R/-RW discs are compatible with most DVD players and can store up to 30 minutes of video in standard mode and 60 minutes of video in long play mode. That's 120 minutes on a double-sided disc!
Yes, at a quality that's worse than VHS. The more 'minutes' you put in, the higher the compression rate. The disc capacity is finite. Even if you use dual-sided disc, then it's going to be 20min x 2 at the best quality (most recorder call it "XP mode"), which is still far worse than miniDV.
Put it this way. For most movies (average 90 minutes), they utilize professional, multiple pass (non-real time) MPEG encoder and they STILL need at least 6 Gb worth of disc space (that's why ALL current retail DVDs are dual-layer / 9 Gb to accomodate the movie itself, menu, special features, 5.1 soundtracks, etc). Mini DVD capacity is only 1.8 Gb, that means the movie being recorded can NOT be 1.8 Gb, 1.6 Gb max (due to header, TOC, compatibility track etc). So imagine cramming 1 hour to 1.6 Gb when the absolute most professional studio can not even do 30-minute realtime MPEG-2 compression to 1.6 Gb.
10 Mbps yields 20 minutes, most camcorder maker now have backed down to 8 Mbps to get 30 minutes onto a disc. To get 1 hour on a single disc you'll need about 3.5 Mbps max. Try watching that on a 20" TV at 6 ft away, especially when you're recording water movement of a lake, scenes with lots of tiny details. They will all look blocky (imagine enlarging a pic from your camera phone) and filled with weird-colour-shift (officially called "macroblocking" and "mosquito noise").
The only mode you can record with the absolute least artifacts is XP mode, which is 20 minutes per side, 40 minutes if you use dual-sided disc. 30 minutes per side (60 minutes dual side) for SP mode.
PS: there are 8cm (3") DVD labelled "60 minutes recording". That is true... but at what mode?
Just like VHS. There are SP, LP and EP modes. For DVD: XP, SP and LP modes (there are also EP and SLP modes, but they are completely unwatchable).
If you want, I can burn you (or anybody who is still adamant about the 'quality' of DVD) a compilation recording (of the same scene) recorded in XP vs SP vs LP vs EP vs SLP modes. You'll be surprised how bad the LP mode is.
I'm just trying to save you from making a grave mistake of using SP, or worse, LP mode.