Movies where you HAVE TO keep TWO audio tracks?

[defense]

I'm just curious as to why it seems like certain movies you HAVE to keep TWO audio tracks in order to get sound or at least 5.1 channel sound. Two movies imparticular are "NTSC" Mission Impossible II and Deep Blue Sea. In MI-II I just stripped with IFOEdit but when I went to play the movie, I noticed that I was ONLY getting 2 channel sound. I tested it out and saw that I had to for some reason keep not only the 5.1 channel surround BUT ALSO the 2 channel. When I did that I could just hit "audio" on my DVD Player and it would switch between 2 channel and 5 channel. I guess the 5 channel for some reason needed to have the two channel along with it in that rare case..any ideas why?

And with "Deep Blue Sea" I just used encoded it with DVD2DVDR but I noticed there are ONLY two total audio tracks on the NTSC version. That seemed strange to me as there are usually more..but I just chose to keep the 5.1 digital track and when I authored I got NO SOUND AT ALL. I quickly remembered MI II and also knew there were ONLY two tracks on DEEP BLUE SEA anyway so I am in the process of getting ready to encode it again WITH BOTH tracks.

I guess i'll have to import "two" tracks into Maestro which shouldn't be a problem..but i'm just curious if ANYONE has any idea why this happens? I mean, why in MOST cases you can just simply select the 5.1 channel surround and get your digital 5.1 surround, but in SOME RARE cases you have to select "BOTH" tracks in order to get at least 5.1 or ANY sound at all...anyone have any clue? My only guess is that the 2 track sound uses files assoicated with the 5 channel and vice versa in these cases...anyone have any idea? Thanks in advance for any info on this.

[redeemer]

hmm, that can't be. the 6 channel file can't be using files from the 2 channel file, their two individual ac3 tracks.

[SaSi]

Has never happened to me. I, also, believe that each audio track is separate from any other, at least acording to DVD specs.

On the other hand, again according to DVD specs, for NTSC DVDs, it is said that you MUST have an LPCM or AC3 track for the DVD to be valid. If the 5.1 sound is DTS (?) then according to pure standard, your DVD player may deny it.

For PAL players, DVDs are supposed to have at least an MP2 track. I've read that most modern players won't have a problem with this. Have you tried these DVDs on other standalones?

[defense]

thank you both for the replies, but check out the NTSC version of DEEP BLUE SEA and Mission Impossible II. Use IFOEdit to strip MI-II and keep ONLY the 6 channel surround. Then burn the disk and play it on your standalone. When you do that, see if you can tell me why you will "NOT" have 6 channel surround. However, if you strip BOTH the 2 channel AND the 6 channel, you can switch between either/or.

Also, Deep Blue sea gave me NO SOUND when I ripped only the 6 channel surround. If what you are saying is accurate, then why else would I get ABSOLUTELY no sound after stripping the 6 channel English Track? I almost IMMEDIATELY knew something may be different with "DEEP BLUE SEA" because I was STUNNED to see there were ONLY two audio tracks on the entire DVD and they were BOTH English. Neither of them was "DTS"..one of the tracks was 2 channel and the other was 6 channel surround.

Any comments/suggestions as to why I got NO sound after ripping the 6 channel surround and authoring in Maestro as always? I've ripped the 2 channel surround and i'm going to add that to Maestro and see when I compile If I now have sound. I have a feeling I will..but if anyone has any idea why I have NO sound playing the VOBS on my hard drive for this movie after authoring with the 6 channel surround..I would really appreciate knowing why. Thanks in advance

[SaSi]

Sorry I can't help you on that. I live in the "PAL" world and NTSC material is not that common. I also don't have an NTSC only standalone to have experience on that.

However, I will agree with you one one thing. Having no sound at all is understandable (see my previous post). Putting a six channel audio and only get two is a bit strange, I would agree.

My only recommendation is to try the DVD on another DVD player and try to compare results.

[defense]

Sorry I can't help you on that. I live in the "PAL" world and NTSC material is not that common. I also don't have an NTSC only standalone to have experience on that.

However, I will agree with you one one thing. Having no sound at all is understandable (see my previous post). Putting a six channel audio and only get two is a bit strange, I would agree.

My only recommendation is to try the DVD on another DVD player and try to compare results.

SaSi, check this out....you know what I think happened? ...I think that some how when I imported my assets in Maestro and dragged the Video..everything was fine..but I think that when I dragged the audio..I may of "overdragged" the audio track and it didn't stay. So when I saved the project and compiled..I think I only compiled the VIDEO...lol....I'm not sure that is what happened..but i'm really starting to believe that is what happened. I am going to reauthor now with ONLY the 6 channel surround and I'll report back....

I just have a hunch that I got side tracked after I moved up the audio..but I must not of perfectly positioned it..because you only have a little room to work with...anyway....I really think that is what happened.....as far as MI-II goes...I'm not sure what the deal with that was either...it very well may of been another "user" error on my part..but I just rememeber there was something strange with not getting 6 channel surround when I stripped with IFOEdit. But again, it was probably an error on my part some how.

[wulf109]

Audio streams are stored or mapped on the disk in acertain order. Some disks treat the 5.1 track as the first track and some treat the 2-channel stream as the first track. Your DVD player will autoplay whichever track the ifo file calls the first track (0x80)

[defense]

well I just confirmed it...I didn't compile my "audio" track and that is why I got no sound.....strange that I would get no sound without compiling an audio track huh? DUHHHH on my part..lol...anyway...

Wulf...I do know about the first and second audio tracks..etc...but didn't think much of it. I wonder if that had something to do with MI-II.

It probably did and I "maybe" mistakingly thought the "first" track
was the 6 channel surround when it was two..that's why my player defaulted to two channel surround and I had to use the audio function on my player to set it to 6 channel. Anyway, at least this was a simple user error on my part.