MKV back to BD

[DSC_Cons]

From a quality standpoint only....Is there any benefit to converting a MKV file back to Blu Ray ? Seems like the MKV's are the same aspect ratio, Frame rate is about the same, both claiming 1080p, x264. When I convert it back to BD the file is usually larger by a few gigs but really nothing substantial even if I'm setting the length on BDBuilder to 23500. Semi new to this, have about 50 coasters from trial and error but finally have it locked down to what I need with my Panasonic Player which is either AVCHD, BD, or MKV, any other format it's his and miss. Don't mind buying BD-R's-25 for the quality which is what I want, but I can't find the best combo to get me as close to blu ray as possible from a burn being played on a player. Anyone have and suggestions as to what they think the best way to go on getting the best quality on a BD-R-25 with the three mentioned file types ? I have pretty much all the converting programs out there. Any help would be appreciated.

Thanks,
Cons

[jman98]

There's no benefit to converting from MKV to BD. If your video is actually being re-encoded when going from MKV to BD then you will actually lose quality. If you are using BDRebuilder (you said BDBuilder but surely you mean BDRebuilder) then why are you not just producing BD output instead of converting to MKV? It seems that you are using BD-25 for storage, and I have no problem at all with that, but there's nothing to be gained by storing MKV over BD format. BD format has some padding the format requires, which is why you see slightly larger sizes on BD than MKV, but as all BD players don't play MKV files I would think that just producing BD discs would give you the best compatibility should you in the future want to watch some of these discs on someone else's player, a player than may not necessarily play MKV files.

If you are actually not producing the MKV files yourself and just downloading them from the internet then you probably shouldn't mention that in any replies in this thread or you may end up getting your thread locked for violating our rules. One of our moderators is overeager in looking for threads to close for talking about "warez" and you really don't need to be giving him any ammunition here. If you reply to this thread, be careful in what you say.

If you don't know about it you may wish to take a look at tsmuxer. It can produce AVCDH and BD output from MKV files without re-encoding. If you are actually using BDRebuilder to re-encode from MKV to BD (I have no idea if this is even possible to use BDRebuilder this way but your post seems to imply it's what you are doing) then it will lessen the quality.

[DSC_Cons]

Thanks for the info Jman98. I actually read a thread in one of your forums about using TSMuxer to conver MKV to BD and it works really well and is very easy to figure out. In my newbie thought process I thought I could gain a better back up of my file iff I used TSMuxer to go from MKV to BD and then ran it through BDReBuilder to try and fine tune the BD file up even more....ya....made a playable BD file but no difference.. Guess I just need to realize 1080 is 1080 after encoding wheather the container carrying the video file is MKV, BD, or AVHCD.

Thanks for the response Jman98. I appreciate all of the education you provide to people like me through this forum. Truly an awesome forum to find out most any information about converting/encoding.

[fritzi93]

So long as the MKV has Blu-Ray compliant resolution (see What is Blu-Ray?, over <---there), and compliant codecs, it's just a matter of remuxing with tsMuxer.

However, if the video in the MKV has been cropped, it won't be possible without a re-encode. Sure, tsMuxer will remux it without complaint, but you won't have a playable BD. You can check the particulars of an MKV (i.e. what's in the container), with Mediainfo.

Good luck and welcome to the forum.

[DSC_Cons]

Thanks for the Mediainfo tool Fritzi ! Tha't s exactly what I wanted to know about every file I've seen or tried to convert. I can tell now what codecs are being used to make up what kinds of files. What a huge reference point I'll have now when messing around with backing up my files. Thanks !

[fritzi93]

If your MKVs are *not* Blu-Ray compliant, you could use uncropMKV to do the re-encode, then remux to BD. Or maybe AVCHDCoder would be better. I'm pretty sure it can take a non-compliant MKV and produce a compliant BD in one go; multiAVCHD is another one. BDRB can't do it.