TSMuxer outputting wrong AR...

[Lathe]

Hello!

Thanks to the help here from my last inquiry I've been able to take MKV files that are backups of my Blu-rays and easily run them through TSMuxer to put them in a nice AVCHD format so that my OPPO BDP-83 can play them more like a Blu-ray disc, using the 'next' and 'previous' buttons to navigate much easier (some of the MKV files DO have chapters that I see in MKVMerge, but my OPPO doesn't recognize them)

BUT... I've run into something that is a bit odd. IF the MKVs are not quite AR compliant (a friend helped me do the initial encoding since I don't know much about that) say with a resolution of 1980x800 (instead of 1980x1200 like Blu-rays are SUPPOSED to be) the AVCHD disc that TSMuxer yields plays back stretched vertically, not completely 16x9, but just about halfway between the 240:1 it's supposed to be and 16x9. Really weird.

Now, here is the odd thing... the original MKV encode plays PERFECTLY on my OPPO with the proper 240:1 AR and looks great, BUT the AVCHD does not and does what I mentioned above. Now, I did read a thread somewhere in searching about this and someone said that TSMuxer doesn't recognize non-compliant ARs and therefore kind of 'guesses' or somehow creates the BMDV folder in such a way that my OPPO plays it back stretched vertically in the wrong AR.

Is that true? If so, I don't suppose there is a chance in hell that there is some setting in TSMuxer where I can correct this? I mean, I really DON'T wanna hafta re-encode just to add the black borders so that the AR is then compliant, especially since the 1980x800 MKV plays perfectly fine.

Any way around this to be still able to use TSMuxer to create the nice playable AVCHD folder, BUT with the correct aspect ratio WITHOUT having to re-encode the movie?

Right now, I'm just figuring that I probably will just have to keep and use the MKVs only if the AR is non-compliant and likely will not be able to use TSMUXER to create AVCHD discs...

Appreciate any suggestions, thanks!

[Baldrick]

No, blu-rays are 1920x1080

Your mkvs are cropped and resized to 2.4:1 frame size/resolution. You must then change the m2ts display aspect ratio to 1:1 but they only support 4:3 or 16:9....and I don't know any tool that can change that either. So rerip or get a better desktop media player or htpc/laptop.

[addu]

just keep in ur bluray dvd player setting to keep aspect ratio. It might be 16:9 fullscreen and another 16:9 keep aspect ratio. I hope all will play fine.

[Lathe]

Thanks kindly guys! Yeah, I KNEW that I got that first AR number wrong, sorry about that... I mean the highest 'proper' full AR for Blu-ray.

It was just interesting that my MKV file ripped from my Blu-ray at the 'cropped' AR plays just fine on my OPPO, BUT, the MKV processed through TSMuxer into an AVCHD then shows on my OPPO as stretched vertically.

THAT really was my question as to exactly WHY the difference with the exact same A/V information in the MKV file as in the resulting AVCHD folder, and yet they result in 2 different ARs, the MKV being correct, the AVCHD being stretched? I'm just assuming that TSMuxer when it puts the A/V information into the Blu-ray compatible format is somehow UNABLE to keep the exact same 'non-compliant' AR.

If someone here knows exactly why, just for my humble education, that would be nice.

Thanks all!

[fritzi93]

The AVCHD spec is strict as to allowable resolutions. With an MKV, anything goes.

Your player simply doesn't like non-compliant AVCHD, or more likely skips any sort of check and assumes it's compliant and therefore screws the AR. You can understand that the manufacturers have no interest in supporting any AVCHD that doesn't adhere to the specs.

If you want to re-encode cropped MKVs into proper AVCHD compliant resolution, something like uncropMKV can do it. Then tsMuxer can mux the uncropped video to a compliant AVCHD. But there's no way around re-encoding cropped MKVs, if you want compliant AVCHD.

[Lathe]

The AVCHD spec is strict as to allowable resolutions. With an MKV, anything goes.

Your player simply doesn't like non-compliant AVCHD, or more likely skips any sort of check and assumes it's compliant and therefore screws the AR. You can understand that the manufacturers have no interest in supporting any AVCHD that doesn't adhere to the specs.

If you want to re-encode cropped MKVs into proper AVCHD compliant resolution, something like uncropMKV can do it. Then tsMuxer can mux the uncropped video to a compliant AVCHD. But there's no way around re-encoding cropped MKVs, if you want compliant AVCHD.

Yeahhhhhhhh, damn, I knew it

Oh yes, I've got and use UNcropMKV which is a real Godsend, let me tell you; I usually use it when the ref frames or the B-frames are too high, something like that where it REALLY needs to be re-encoded. Thank you VERY much too for the explanation. Totally makes sense. Well, what I'm doing now is simply what I did before I had the inspired wet dream about TSMuxer... I'm basically just keeping the MKVs as is and the OPPO plays it just fine.

I'm experimenting a little and like was mentioned above, if the AR is fairly standard like 16x9 or 4x3 or I just tested a 1.85:1 that I had of 'SIXTEEN CANDLES' and the resulting AVCHD played just fine. So, I GUESS if I stay with MKVs encoded with those ARs I should be okay in Muxing them to AVCHDs; but DEFINITELY the 2.40:1s are a no go. A number of my MKVs are like 1920x802 or 1920x798, showing in MediaInfo as having an AR of 2.40:1, so anything that looks like that I'll just leave as an MKV file. I don't know if I can get away with any OTHER ARs though... Aren't some like around 225:1 or there abouts?

Well, I have the answer thanks to all of your help; VERY much appreciated!

Cheers!