BD to MKV fix lenght

[cormiodo]

Dear all,

what is the best way to convert the m2ts file (25Gb) to mkv but fixing the lenght of the output? In other hand, I need to obtain one MKV file that I can burn in a DVD5 or DVD9 then I need a file that will be 4Gb or 8Gb.

Many thanks.

[redwudz]

I use RipBot and two pass MKV. With that you can choose a output size. I normally use 8150MB for DL DVD backup, but you can select different sizes there. This won't work with single pass encoding as the size will be variable. BDRebuilder can probably also do this.

[cormiodo]

Thanks you! Great.

[fritzi93]

Does anyone else find RipBot to be painfully slow on the second encoding pass?

Anyway, I use an alternate method; Re-encode with BDRB to BD 5/9. If I want an MKV as well, I load the *.m2ts into HDConvertToX. It will find the video, audio, subs, and chapter timings automatically. Choose h.264 in MKV, select *copy* video and audio, leave chapter timings alone, and make sure the correct box is ticked so the subs are selectable. (To have hard subs requires a re-encode). It will convert the subs from *.sup to *.sub automatically, as BDSup2Sub is included in the tools folder.

Basically a re-encode, then a remux, and it's pretty quick. I know, there's an extra step in there, but overall it's considerably faster on my computer than RipBot.

I'm curious how others do it.

[redwudz]

AFAIK, the RipBot first pass just generates a file for setting the final encoder bitrates. Similar to what VirtualDub does with a two pass encode. My first pass usually take a bit more than an hour and the encoding pass about 5 hours. That is to produce a 8GB MKV.

[fritzi93]

Yeah, first pass is for analysis.

I don't have the CPU horsepower you do. Guess I'll have to swap in a quad sometime next year. I can do a BDRB encode overnight, and I can do other stuff first thing in the morning. OTOH, RipBot can take more than 20 hours to complete on this machine. That's just too inconvenient.

[redwudz]

Yeah, a quad core helps quite a bit with a multithreaded application. When I had my quad PC running at 2.6Ghz, it only took about an hour more. So you don't need a really fast quad or fast RAM.

Going back a few years, it used to take me about 12 hours to encode a DVD to a SVCD, 2 disc. I think I was using a single core Celeron 400Mhz CPU. With that setup a BD>MKV would probably take more than a few days. You can get a quad, Intel or AMD, and a Micro-ATX MB for a reasonable cost at present. If you plan to do BD>MKV or similar conversions, really the only way to go.

[fritzi93]

I'll have to take a harder look at RipBot settings, maybe there's something I missed that could speed it up a bit.

If I didn't have TME, I'd probably do more MKVs. They play quite nicely in MPCHC. But a mounted Blu-Ray ISO played in Digital Theater is even better.

No one else has any comments on their own BD -> MKV methods?