Linux - GeneralThis Linux forum is for general Linux questions and discussion.
If it is Linux Related and doesn't seem to fit in any other forum then this is the place.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
I'm going on an international trip later this year and I've started ripping some DVDs to put on an external HDD to use with a laptop for the trip. Two-pass encoding will obviously result in a better quality rip but I've got a quick question relating to SMP (dual-core systems) and the encoding process.
As mencoder requires two running processes using this method, would I be correct in assuming that each would run on a different core which would make two-pass a considerably smarter option than single-pass? When encoding a DVD with a single-pass, top reports that one core is doing all the work which makes sense so logically a second encoding process using the second core would be a better option.
Anyone know more about this willing to weigh in an opinion?
the second pass uses information derived from the first pass. afaik they MUST run sequentially, not consecutively.
I agree. You need a complete pass to have the correct information for the second pass. Still, if you are just looking for a diversion to watch on a trip, a single pass should be fine.
in my head, two pass encoding works by doing an initial scan encode of the film and recording how well the encoding works on each frame as it goes along. once completed you have a record of where more quality is needed (i.e. more disk space - high motion scenes etc...) and other parts of the film where the detail is not needed and so borrow that space in the knowledge that you can afford it on the whole.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.