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Cheap Tapeless DV Capture?
K'thardin asks: "Recently I've been chafing under the limitations of mini-DV tapes, as I attend various conventions throughout the year and record certain events and information panels. These limitations include dropped frames, gummed up tape heads (especially prevalent when you spend more than fifteen minutes at a time on pause), and most importantly, time constraints as the largest mini-DV tapes can only hold 83 minutes on SP (a little over 2 hours on EP, with a loss in quality and larger possibility of dropped frames). Several events I attend can run for 4 hours or more, so the time constraint is one of the worst, as it requires me to change tapes several times, thus loosing vital footage." Are there video acquisition devices out there that can record to high density media as well as (or instead of) DV Tapes? If not, how difficult would it be to build a portable one?
"There are several tapeless acquisition systems out there, such as the Firestore FS-4, the QuickStream, and the ADS Pyro drive. The advantages to these solutions are generally longer recording time, elimination of dropped frames, and the ability to record natively in several video formats, removing the need for time-consuming tape capture. The problem with most of these is that they are prohibitively expensive for the larger capacities, require user-built portable power solutions for long duration recording times, are not upgradeable, and have been reported to be buggy by several users.
Considering these devices are little more than specialized computers, I've been considering what sort of devices would be a cheap and more reliable alternative to commercial offerings. An article on DVInfoNet details the creation of a relatively cheap and upgradeable tapeless acquisition system that uses a tablet PC. The problem with this is power and space constraints. There are several existing and upcoming Linux-based devices out there (as well as those that can be made to be Linux devices) that can be made to do what I wish with the capacities I need. The problem there is that none of the ones I've found come with a Firewire port, which is vital for tapeless acquisition on current DV based cameras. Also is the problem that many of these acquisition systems do not have the capability of being upgraded, or simply lack the ability for one to swap out hard drives should it become necessary (such as recording two 4-hour events back to back ... I've done this). The only possible solution I've seen containing a needed Firewire port is the Apple iPod, and it doesn't seem to have the ability to process the information coming in from a camcorder fast enough to prevent jittery video; nor is it upgradeable.
Does anyone else have this complaint? Are there any devices I've overlooked that fit the criteria of small, relatively powerful, cheap, power-efficient, Firewire-enabled devices with upgradeable/swappable hard drives that are able to run Linux?"
Considering these devices are little more than specialized computers, I've been considering what sort of devices would be a cheap and more reliable alternative to commercial offerings. An article on DVInfoNet details the creation of a relatively cheap and upgradeable tapeless acquisition system that uses a tablet PC. The problem with this is power and space constraints. There are several existing and upcoming Linux-based devices out there (as well as those that can be made to be Linux devices) that can be made to do what I wish with the capacities I need. The problem there is that none of the ones I've found come with a Firewire port, which is vital for tapeless acquisition on current DV based cameras. Also is the problem that many of these acquisition systems do not have the capability of being upgraded, or simply lack the ability for one to swap out hard drives should it become necessary (such as recording two 4-hour events back to back ... I've done this). The only possible solution I've seen containing a needed Firewire port is the Apple iPod, and it doesn't seem to have the ability to process the information coming in from a camcorder fast enough to prevent jittery video; nor is it upgradeable.
Does anyone else have this complaint? Are there any devices I've overlooked that fit the criteria of small, relatively powerful, cheap, power-efficient, Firewire-enabled devices with upgradeable/swappable hard drives that are able to run Linux?"
gummed up tape heads (especially prevalent when you spend more than fifteen minutes at a time on pause),
Let's see: what kind of movie would you pause for 15 minutes? not a football match (you usually re-run an action over and over, not pause), not a regular movie (same thing)... Obviously a movie that you want to freeze a certain scene to marvel at it at length... hmmm, I wonder...
"A door is what a dog is perpetually on the wrong side of" - Ogden Nash
You just need to remember to change tapes after George Takei talkes, and before the costume contest starts.
I'd hate to have to sit thru your home movie collection.
This issue is a bit more complicated than you think.
You've got two options available in the pro video (non-homebrew) marketplace:
(a) To get less dropped frames, use DVCAM tape in your miniDV camera, not cheap miniDV tape. DVCAM has a much stronger backing, better lubrication and is generally worth the extra money. Better yet, use a Sony DVCAM camera with the DVCAM tape because the track pitch is wider resulting in fewer (if any) lost frames and you get SMPTE timecode instead of lame, broken mini-DV timecode. However, the downside to this solution is that the tape pulls even faster than DV, resulting in 30% less recording time per tape, and you haev to spend $4000 on the camera at minimum. Woe is Pro.
(b) Check out the Panasonic P2 cameras which records onto flash media in a variety of digital codecs including DV-25 (same as mini-DV), DVCProHD, etc. While the most you can get right now is a 12 gig flash, that will change eventually and the media ingest to your computer is much faster than capturing. This is the wave of the future. Within a year there will be a P2 camera that's under $3000.
iSight is a fun toy, and good for confrencing and maybe seeing a girl naked on the other side of the country, I don't think it'd be that great for recording your favorite stripper's 4 hour set.
That will hold a TON of video
But with a Beowulf cluster of Linux, I bet you could hold at least a megaton of video.
Personally though, I wont be satisfied until I can haul a teraton of video around.
Welcome to Ask Slashdot- Replies.
Reply 1:
Rant here, based on 25% or less of original post.
Blindingly obvious but tangential fact #1 here.
Blindingly obvious but addressed in original post, fact #2 here.
Comments about intelligence of original poster here, combined with smug inuendo and self aggrandizement.
Reply 2:
Same as for reply 1 above, but now directed at poster of Reply 1.
Reply 3:
Complete change of topic. The less related the better.