pal avi conversion audio sync wrong

[matneaves]

i can do an excellent vcd if an avi is 23.976 and i mean the quality is ace, even fitting onto 1 cd using the bitrate calc

but when its a pal avi (25fps) the sound sync is out by about 3 seconds

i dont knwo what im doing wrong, im selecting correct templates in tmpgenc but dont matter what i click on/unclick still bad sync

[narked]

Does sound go gradually out of sync or is it constant? (example a movie 1hr 50mins long at 23.976fps will end up at 1hr 46mins long at 25fps, the sound needs to go the same) Did you save uncompressed wave first and interleave with avi before conversion? This normally sorts this prob. Give a few more details.........

[matneaves]

ok my steps in creating mpg for vcd burning if its a 23.976 avi

1. i decomopress avi which creates file called blahblah_pcm.avi

2. i loadup vdub and load avi, writing down file info (fps, movie length)
click audio/full processing/no compression/convert to 44100 and save wav

3 load up bitrate calc to fit on 1 cd (i can fit a movie up to 2 hours on 1 vcd with ace quality)

4 load tmpgenc v2.5,i use the wizard to start, select template i know 23.976fps is ntsc film

load pcm video and load saved vdub wav,

click next

source range 0 to last frame

click noise reduction (does its quick flicker thingy)

then other settings , video tab i click the slowest method

then on advanced i click ghost reduction, sharpen edge and simple color correction

full screen (keep ascpect ratio)

audio tab , i select error protection

click next , and ignore file wont fit message as bitrate is gonna change that

unclick encode immediately

and load the unlock template

i then type in the bitrate that the calc gave me and click start and go to bed (7 hours encoding time)

this is what i do for 23.976 fps films but when i do 25fps (pal) i thought all i had to do is select the correct template at the begging which is the 25fps

ive just thought is the unlock template changing me settings around

[matneaves]

if im backing up 1 off me pal dvds no sound sync probs at all even when i load unlock template and lower bitrate

i just did aliens, 2 hours 26 mins on 1 cd and is quite good, not brilliant but very watchable, im happy

[narked]

sorry for late reply, been away a couple of days.

I,ve never gone through the process of trying to fit movies on one cd, so the steps you've taken I'm not familiar with. However, a few questions:

You're uncompressing your avi first? Not a step I'm familiar with, is this due to your wanting to put movie on one disc? I,ve never uncompressed one first, TMPG copes quite well with all formats.

Once you have uncompressed wave sound do you check it's syncing with the movie? What I do:

in virtual dub, open movie, then open wave (go to audio - wave audio). Check syncing by watching small parts of movie (if it's syncing at end of movie, then it's OK).
Save this avi with new filename (Direct stream copies so uncompressed wave is interleaved with the avi - only takes a few mins).Then send this new avi to TMPG, works perfectly for me.

[matneaves]

the reason why i decompress 1st is so i can load the avi into virtual dub, or it will bring up an error
to fit on 1 disk isnt hard just use a bitrate calculator type in the time lenght of the film and it shows the bitrate to to encode at not the usual 1150
then when you encode the final meg size of the mpg is around 800 megs which fits onto a 700 meg cd, weird but it doed

but it all works fine with a 23.976 fps avi not a 25fps

[matneaves]

ok, just for the fun of it i decided to just load up tha avi without decompressing and stripping sound and tried to encode

PERFECT

i read somewhere that i had to decompress the avi and strip the sound 1st, but i ibviously dont have to, aslong as i select the correct template at the beginning its seems to be fine

AND IT WAS A PAL AVI, at last!!!!

AND ON ONE DISK,,,wikid!!!

(just did "curve it like breakham" and great quality) :P