RipBot Settings - Planning a PC upgrade

[EdinburghKev]

Hi guys, hopefully you can advise me on the following.

I am currently converting Blu-ray disk 300 to mp4 using RipBot v1.11.3 (still to upgrade to the latest version). I am running the conversion on a Dell Latitude D820 laptop with a Centrino Duo processor. I am using the following settings: CQ 18 to fit on a dual layer dvd.

The first pass is running at 9628kbps & 5.76fps. This is my 1st conversion, is the CQ setting a 2 pass conversion? I am 5 hours in to the 1st pass with over 2 hours left. I used tsremuxer to mux the audio and movie to ts file then imported this in to RipBot. What is the encoding software of choice at the moment?

I am planning to buy a higher end desktop PC and I am wondering what kind of time conversions are taking for others. I was looking at building a quad core desktop with 4 GB DDR2 ram running Windows Vista Premium SP1.

Thanks

[redwudz]

I just process Blu-ray to 4.36GB MKV backups, using a two pass encode with RipBot. Takes about 6 hours with a quad core 9300 running at 3Ghz. The program is able to use all four cores at 100%, so it's fairly efficient.

[EdinburghKev]

Thanks redwudz.

[RickA]

Greets,

To put things simply:

- CQ mode is a one pass method. It gives you a constant quality picture throughout the video. During the encode the average bitrate and end filesize are unknowns. The encoder uses the bitrate it needs to give you the quality you ask for. Use this if quality is more important than filesize.

- With a two pass method then you will need to choose an average bitrate or a certain filesize. This method the encoder uses 2 passes to try to match what you asked for. First pass examines the video, second pass uses that info to encode with. Use this if filesize is more important than quality.

CQ18 has been considered to be 'transparent'. Meaning, while viewing, it is almost undetectable to the original source material - within reason. With recent changes to x264 that number has been upped a notch or two to CQ 19 or 20. So say some in the know at another forum (Doom9.org) where the devs of x264 and Ripbot frequent.

Ripbot264 is a great little program and one that I currently use a lot. I must have overlooked it but I do not recall a 'CQ18 to fit on DVD9' setting in Ripbot. Possibly you are using a prefab profile setting while I use my own custom one.

Cheers,
Rick

[EdinburghKev]

Thanks for the reply Rick, it has been very helpful. I wonder if I chose the 2 pass method before i posted.

I will rip using the CQ mode at 20 and compare the output with a TS created using txmuxer.

[jagabo]

Make sure you decoder and encoder are set up to use at least two threads.

[streetak]

Well I have bluray movie 1080p. The m2ts file of movie has 35GB. What will be size CQ 18? It will fit on DVD9 or bigger?
Thanks

[jagabo]

Well I have bluray movie 1080p. The m2ts file of movie has 35GB. What will be size CQ 18? It will fit on DVD9 or bigger?

Nobody can tell you what the size will be. With constant quality encoding you will get a fixed quality but an unknown file size. In bitrate mode you will get a fixed file size but an unknown quality.

By the way, a better compromise of size vs quality for day-to-day watching would be about CQ 22.