Hi Jorge, I would keep each chuck to under 10-min or 2 GB. Depending on what type of analysis you undertake, and the software and computer used, everything gets easier as file size gets smaller. We've had a lot of trouble with 2 GB or larger files crashing certain software programs (Final Cut and Adobe Premiere and Audition) and they always take longer to open. Of course computers and software are getting better and faster, but even most of the camcorders today automatically save longer recordings into smaller chucks, often at around 2GB, which in HD is about 10 min. I've also noticed some "drift" in time code, which becomes more problematic as file size, and your need for temporal resolution on the order of msec or smaller, increase.
Karl On Wed, Oct 14, 2015 at 3:54 PM, Jorge A. Santiago-Blay <[email protected] > wrote: > Dear Ecolog-Listers: > > A few months ago, I posted a question on research videos for analyses of > behavior. Thanks to your suggestion, as I write, we are going from VHS > directly into digital and the quality remains good. > > Question: How large (in Gb or time) should each chunk of digitized video > be? The first VHS is projected to take 100-110 minutes just compressing > (not counting the 6 hours of length of the video). If you have any > information on this, please, feel free to email me directly at > > [email protected] > > Gratefully, > > Jorge > > Jorge A. Santiago-Blay, PhD > blaypublishers.com > > 1. Positive experiences for authors of papers published in *LEB* > http://blaypublishers.com/testimonials/ > > 2. Free examples of papers published in *LEB*: > http://blaypublishers.com/category/previous-issues/. > > 3. *Guidelines for Authors* and page charges of *LEB*: > http://blaypublishers.com/archives/ *.* > > 4. Want to subscribe to *LEB*? http://blaypublishers.com/subscriptions/ > > > http://blayjorge.wordpress.com/ > http://paleobiology.si.edu/staff/individuals/santiagoblay.cfm > -- -- Karl S. Berg Assistant Professor Biological Sciences University of Texas One West University Blvd Brownsville, TX 78520 956-882-5049 [email protected]
