To AC-3 or not to AC-3

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DJ_Izumi
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To AC-3 or not to AC-3

Post by DJ_Izumi » Mon Aug 23, 2004 11:49 pm

For my Noir Raider trailer, I aquired something special. Previously, I had tried to aquire the VOB trailer of Tomb Raider, rented the DVD and surprise surprise, no trailer on it. Infact, no American version of the DVD had a trailer. I managed to track down a guy in Germany with the Lara Croft: Tomb Raider 3 disc German PAL edition and he was nice enough to send me the AC-3 stream for the American thatrical trailer.

Not only that, but I was greatly surprised when listening to the stream he sent me, it was of higher quality, greater depth of sound, and small details unprecivable in the audio I had originally used (Stripped from a 640x QuickTime file, heh) Not only that, but isntead of this stream being the standard 192kbps that us commonly used for 2.0 AC-3 streams, it was at 224kbps instead. So now I've hacked together a new AVI with DivX5 for video and a cut and spliced, but NOT re-encoded so it's the highest possible quality I can accomplish, it's complete with a 6.5 second Dolby Digital 'Enlighten' bumper at the begining before the MPAA bumper.

But should I replace this? I'm not sure if it's a good idea since a lot of people might go "OMG WTF NO AUDIO U SUXOR I GIVING UR VIDEO A ZERO IN OPNIONZ LOZER! :(" On the other hand, I get to brag that I possible did the first video on the org that was not only 856x480, but was also in Dolby Digital. (I guess to surpass that, my next video will have to be THX complaint. :P)

Comments? :/
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DJ_Izumi
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Post by DJ_Izumi » Mon Aug 23, 2004 11:52 pm

*Possibly

*Cut and hacked the AC-3 stream

God I wish there was an edit button.
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bum
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Post by bum » Tue Aug 24, 2004 10:42 am

ever tried working on something els other than that vid which you seem to mention somehow in almost all your posts ?

oh and, weeeeeeeeeeeeeeeeee im finaly back :D

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Al'x
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Post by Al'x » Tue Aug 24, 2004 3:19 pm

I'm thinking... don't use ac3.

It would give complications.

And most people wouldn't notice or care if you changed it...

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Voices_Of_Ryan
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Post by Voices_Of_Ryan » Tue Aug 24, 2004 3:33 pm

Anything I would say might come out sarcasticly seeing as we seem to be in a bit of the same boat.

I would like to comment though, that in my honest opinion, you need to start working on other videos and stop obbsessing on making the video you've already released twice better.

Sure perfection is everything, then again... But downloading one video 3 or 4 times also rocks.
"hey... no"

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AbsoluteDestiny
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Post by AbsoluteDestiny » Tue Aug 24, 2004 5:06 pm

as for mp3 vs ac3 you have to decide between:


1) Knowing you have the best quality audio that there is and it's other people's fault if they can't play it

or

2) Decide that the amount of people that will be able to tell the difference between the ac3 and mp3 are smaller than the amount of people who cant play an ac3 and hence aim for the bigger market choosing mp3.

Those are the options. I go for 2, but that's just me.

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Zero1
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Re: To AC-3 or not to AC-3

Post by Zero1 » Tue Aug 24, 2004 5:33 pm

DJ_Izumi wrote:So now I've hacked together a new AVI with DivX5 for video
If it's quality you're aiming for, how about using XviD :lol:

DJ_Izumi wrote:Not only that, but I was greatly surprised when listening to the stream he sent me, it was of higher quality, greater depth of sound, and small details unprecivable in the audio I had originally used (Stripped from a 640x QuickTime file, heh)
Maybe because the Quicktime was encoded from the 192kbs AC3 audio, into something like a 128kbs MPEG audio stream?

DJ_Izumi wrote:but NOT re-encoded so it's the highest possible quality I can accomplish, it's complete with a 6.5 second Dolby Digital 'Enlighten' bumper at the begining before the MPAA bumper.
I'd dump a Huffyuv from Premiere next time, then play around with the encoding all you like without having to botch things together. Keep things consistant that way. It's hard enough getting people to install the correct version of XviD to play my video right (which is bog standard XviD/MP3)

DJ_Izumi wrote:On the other hand, I get to brag that I possible did the first video on the org that was not only 856x480, but was also in Dolby Digital.
Brag all you like :twisted: , that rez is screwed anyway. For starters 856 is not a factor of 16. Secondly, if you are aiming for 16:9, the nearest compliant rez is 848x480. The aspect ratio you are using is 1.783 recurring, the 16:9 is 1.77 recurring.

As for bragging rights, I could dump my video as an uB@r resized and filtered 1024x768 XviD with AAC, which wouldn't play on any machine (probably)


DJ_Izumi wrote:but was also in Dolby Digital. (I guess to surpass that, my next video will have to be THX complaint. :P)
Wouldn't THX compliance specify that the video should be MPEG2 and/or an MPEG system file?




It's nice that people are willing to go out of their way for quality, but I think this is being a little extreme. a 3000kbs XviD with 224kbs MP3 will suffice for most people. (well I use 1900kbs XviD with 160kbs MP3 and my ops for audio and video have been on average 9.7+, so I'm guessing people find that is good enough)

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billy_wires
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Re: To AC-3 or not to AC-3

Post by billy_wires » Tue Aug 24, 2004 6:26 pm

DJ_Izumi wrote:But should I replace this? I'm not sure if it's a good idea since a lot of people might go "OMG WTF NO AUDIO U SUXOR I GIVING UR VIDEO A ZERO IN OPNIONZ LOZER! :(" On the other hand, I get to brag that I possible did the first video on the org that was not only 856x480, but was also in Dolby Digital. (I guess to surpass that, my next video will have to be THX complaint. :P)

Comments? :/
Speaking as a complete and total dumbass pointing out the obvious, I would say your best bet with an AC-3 audio source would be to post in the discription, very clearly marked and written at a first grade reading level, how to play the video with your sound source. My reasoning is if someone is going to give you an opinion of any worth, they will probably read the description. Also, if you have some eye-catching tag like:
Video Description wrote:*********************************************************************************************
HOLY CRAP READ THIS TO FIND OUT HOW TO PLAY THE AUDIO L@@K @_@ L@@K L@@K L@@K!!!!! @_@
*********************************************************************************************
right at the top, people might actually listen to you.
DJ_Izumi wrote:Not only that, but I was greatly surprised when listening to the stream he sent me, it was of higher quality, greater depth of sound, and small details unprecivable in the audio I had originally used
AL'x wrote: And most people wouldn't notice or care if you changed it...
I'd notice...
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DJ_Izumi
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Post by DJ_Izumi » Tue Aug 24, 2004 6:34 pm

Voices_Of_Ryan wrote:Anything I would say might come out sarcasticly seeing as we seem to be in a bit of the same boat.

I would like to comment though, that in my honest opinion, you need to start working on other videos and stop obbsessing on making the video you've already released twice better.

Sure perfection is everything, then again... But downloading one video 3 or 4 times also rocks.
I'm not obsessing, I'm experimenting. I'd like to do AC-3 for all future trailer projects as well, plus I want to standardize the stretching out of anamorphic video to 856x480 (Or so, depending on cropping), things I'd like to continue to produce such awesome quality works. :)
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Voices_Of_Ryan
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Post by Voices_Of_Ryan » Tue Aug 24, 2004 7:00 pm

DJ_Izumi wrote:
Voices_Of_Ryan wrote:Anything I would say might come out sarcasticly seeing as we seem to be in a bit of the same boat.

I would like to comment though, that in my honest opinion, you need to start working on other videos and stop obbsessing on making the video you've already released twice better.

Sure perfection is everything, then again... But downloading one video 3 or 4 times also rocks.
I'm not obsessing, I'm experimenting. I'd like to do AC-3 for all future trailer projects as well, plus I want to standardize the stretching out of anamorphic video to 856x480 (Or so, depending on cropping), things I'd like to continue to produce such awesome quality works. :)
I wont do AC3 till everyone can play AC3, just like I'll continue using mpeg1 for a few more years intill I feel fit that everyone can play xvids and mpeg2s.

Sure I'll make multibles, but i'm not gonna specificly put in just one type then complain when someone says they cant watch/hear it.
It's retarded.
"hey... no"

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