made a re-encode of resolution but now have sound out of snyc

[dvdbunny1]

Hi Folks,

I just used the latest beta version of auto gordian knot, and was trying to do a re-encode of an xvid movie. The original resolution was wide screen 960x528 i converted to 624x352 the quality was still very good. The sound is 5.1, i kept the sound in the conversion and i also kept it xvid to xvid. All i did was change the resolution, it took 2 hours 50 mins to do. But when i play it back on my mpeg 4 player it plays the picture fine, the dolby digital ac3 5.1 does not sound very good even though it is coded at 384kbps, also the movie starts off with the lip syncing being in sync but after 10 mins through it goes out of sync by 3-5 seconds. Also when i start the movie if i rewind or fast forward or jump to anywhere in the movie automatically the sound goes out of sync for about 5 seconds. How can i fix this problem?

After the encode is finsihed i looked at the log file that auto gk creates and it says that either choose a smaller size or choose a higher resolution. I originally wanted 720x480 but i chose fixed width at 720 in advanced options but after it demuxed audio and does a few other things it says chosing for this encode 720x400 which i don't want and i have also tried this and the sound is still out of sync.

what can i do to fix this problem with the sound out of sync?


Also will a future version of auto gk allow you to set both the horizontal and vertical resolution by using a pull down menu, or by typing in vertical and horizontial resolution?

Also please tell me what is first pass and second pass?
Is their a way to do just one pass encoding?

please any help much appreicated


thank you very much

[manono]

Hi-

I don't know why your audio goes out of synch when played on your MPEG-4 player. Is the audio in synch when played on the computer? If so, it's a player issue. Perhaps remuxing the audio might help, but since you didn't give any information about the player, I wouldn't know for sure.

After the encode is finsihed i looked at the log file that auto gk creates and it says that either choose a smaller size or choose a higher resolution.

It means that with the settings you chose (resolution and file size) AutoGK couldn't reach that size. Do what it says.

...it says chosing for this encode 720x400 which i don't want and i have also tried this and the sound is still out of sync.

Why didn't you want 720x400? It's a 1.85:1 movie, isn't it? Don't you want things to look "normal"? That's nothing to do with the audio asynch issue, though.

Also will a future version of auto gk allow you to set both the horizontal and vertical resolution by using a pull down menu, or by typing in vertical and horizontial resolution?

I doubt it. The idea is to do it right, and not to let people screw it up out of ignorance.

Also please tell me what is first pass and second pass?

2-pass encoding is to give the best possible quality for a given file size. The first pass gathers data which is then used in creating the AVI during the second pass.

Is their a way to do just one pass encoding?

Tick "Target quality (in percentage)" on the main screen, and choose a quality (the default is good). However, by doing that, you'll lose all file size predictability. Because different movies compress differently, one movie might come out to be 700 MB, and the next one at 3 GB.

[dvdbunny1]

Hi manono,

Thank you for the reply,

Okay to answer some of your questions, the original source plays back perfectly on my PC, no problems with sound going out of sync. I have ffdshow installed on my PC, i don't ever check on updates for it, as i really don't do much re-encoding until recently. I also have installed the latest full version of auto gk, and the latest beta. which also includes xvid beta 1.1, i think thats the correct version number that i remember from the installation. i also have installed the ac3 filter i can't remember where i have found the filter from.
I use windows media player to playback all my avi movies, and cyber link power dvd to play back dvd movies.

once i make the rencode in auto gk and get the new resoltuon of 640x352 and 720x400, i then play it back on my PC, but have probelms with the audio going out of sync and this problem happens on both my PC and my stand alone mpeg 4 dvd player.

well as i have given you all the system information such as what filter i have installed, i was hoping you could give me the details on what seems to be the problem on the sound going out of sync.

thank you for any help

[manono]

Hi-

So it's out of synch even on the computer? That's a problem, all right. Let's try and fix that first. Do you have any other software players you can try? I just don't trust Windows Media Player. Since you'll need Media Player Classic to find the delay, I'd recommend that you get that for testing. It's such a good player anyway, that you may find you like it enough to keep it as your default player. You can find it in the Doom9 Download Player section.

I'll assume it's still out of synch on that player. Is it asynch the same amount at different parts of the movie? That is, is the asynch constant, as opposed to getting worse as the movie goes along? I'll assume it's a constant asynch, as that's the most common. So, open the movie in MPC. Then right-click the screen and go Filters->Audio Switcher->Check the "Audio Time Shift" box, and set a reasonable delay and check to see if it is back in synch. Adjust it until it sounds good.

Then open the AVI in Nandub. Set both Video and Audio for Direct Stream Copy. Go Audio->Interleaving and set the delay for what you decided it was in MPC. Also you might set Preload for 96 ms, and Interleave to 96 ms (NOT frames). Then Save it under a new name and test. If it's now OK when played on the computer, then burn it to disc and try it in the MPEG-4 player.

However, sometimes the audio getting asynch has to do with not having enough CPU processing power, so I hope you don't have an old 500 MHz CPU. Hope that gives you some ideas on how to fix it. Otherwise I wasted a lot of writing for nothing. :) Good luck.