Converting 23.97 FPS To SVCD

[zero_net]

OK, Im trying to convert a high quality AVI to svcd without audio sync problems, I have search the forums for hours and found similar problems but no answer.

So basically i need to make the AVI 23.97 fps into 29.97 so i can convert with tmpgenc, It converts to VCD perfectly , but the quality is crappy and the avi i have is high quality.

If someone knows how to do it please post.

[hotwings]

so why don't you convert to svcd while increasing the framerate? tmpenc should be able to do that without losing audio synch. I have done this with tmpgenc before. Maybe if you had a smaller file, say use virtualdub to save a small portion of this file you want to convert, then run it through tmpgenc while changing the framerate in settings and setting the mpeg2 parameters..

[hotwings]

heck there's even a supervideo cd template that comes with tmpgenc so it should be a snap..

[leem6453]

You can still use Tmpeg with 23.97 frames per second. As a matter of fact, I prefer encoding at 23.97. I always get better quality. Just select the "svcdfilm" template.

Also, have you tried DVD2SVCD. I use that program exclusively now for DVD rips and AVI files. You can get it at www.dvd2svcd.org.[/url]

[zero_net]

how do i change frame rates in tmpg ?
Im not really get what ur saying .


when i try and convert 23.97 to svcd film it audio goes out of sync. thats the problem

[zero_net]

the audio is off by 2-3 seconds,

i ripped a small part from the video with virtual dub so i wont have to keep encoding the whole thing, tmpgenc encodes the part perfecly though, why is that.

i ripped the audio into wav before encoding the full video and it still out of sync, i also tried it with the wave and same results, i cant figure out the problem

[zero_net]

OK, i have been expirementing with the settings with the small video clip, just to see what happens.

but i still cant get the answer!!!!!

been up for 6hours trying to figure it out, running shit through virutal dub converting to this and that , back to tmpg

[Laddydaddy]

The frame rate for svcd film is 23.97 fps which is what you say the avi file is. You may have some bad frames in your avi file which would throw the video out of sync. Scan it for bad frames using virtual dub mp3 freeze. See what it comes up with.

[zero_net]

No bad frames found,

tried converting 4th time takes an 1hour to convert.
tried different settings and still no luck.

[leem6453]

It's got to be your file. Is it Divx? I've had trouble with those in the past, and alot of times they're very unstable.

[zero_net]

how can i repair it, how can i find out whats wrong with it ?

i dont think its the file because i can convert it to VCD film 23.97 with no problem, and the file is 23.97fps so i can see how their can be a problem .

converting 23.97fps to svcd(29.97), tmpgenc probly cant handle the frames, why cant svcd be 23.97 ? .

[kees1952]

Don't convert the video frame rate. It's usually not the solution.
I assume that your "high quality avi" (a better spec would be nice next time) is a DIVX with MP3 VBR audio at 48 kHz.
Did you extract the audio in the correct way ? Or in the same way most people do: load AVI into VDub, hit File, Save Wav... and that's it. The audio tab will show "direct stream copy" and you'll end up with a .wav file wich is really an MP3.
The correct way: load AVI into VDub, set audio to "full processing mode", convert to 44.1 kHz, no compression and save as .wav file.
Load this wav file as audio in TMPGenc, correct the (constant) audio sync in the source selection part, and encode.
It worked for me and it's woth the try.

Regards, Kees Janssen.

[Laddydaddy]

If you use the svcd FILM template in TMPG it will encode at 23.97 fps. Both the vcd and svcd film templates encode at 23.97 fps.

[zero_net]

all the svcd templates say their 29.97.

im gonna try converting with full processed wav file.
and try dvdsvcd program.

ill be back after 4hours of encoding

[zero_net]

640x480
DivX Mpeg4 LowMotion

the audio is
44100hz
MpegLayer3 Codec(pro)

[tartanarmy]

@Kees Janssen.


Thanks Kees i almost deleted a film cos of audio sync problems your way worked a treat for me thanks.
[/quote]

[zero_net]

nothing works !!!!! u cannot covert 23.97 fps into SVCD , because when i convert to vcd it works perfect and if i encode a AVI that is 29.97 to svcd it works

only converting from 23.97 to 29.97 does not work

ive converted over 10 times now, everytime the video is shorter by 3 seconds.

the original is 45:45 the encoded is 45:42.

[zero_net]

I tried once again.

tried converting to a new avi with VD in direct stream and full processed then converting to mpeg2

still off by 3 seconds!!!!!!!!!!!!

TMPGenc just cant convert that!!!!! if anyone has succesfully converted 23.97 to svcd post what u done.

[zero_net]

ive noticed that virtual dub encodes the audio into wav at different times if using different settings,

what audio setting shoud i use,

since tmpgenc cannot ecncode the video at the correct time maybe i can encode the audio and the time that tmpgenc is encoding the video.

.

but why cant tmpg encode 45:45 to the exact time ? isnt their a option to tell it not to change it.

[gonzalimator]

Hey zero_net,

Did you say your source is DivX? When it's DivX it's always a good idea to strip the audio first with Virtualdub. Now it'll be a large file so make sure you have over a gig of space on your HD.

In Vdub load your movie.
Go to the Audio menu and select 'Full processing mode'
Go to the Audio menu again and click on compression.
Set the compression to PCM uncompressed.
Go to the File menu and select 'Save WAV'
Choose a spot for the sound file and save it.

Now when you encode the movie in TMPG, select the new WAV file as the audio source and it should work, no matter what the framerate. It should remain in sync. The problem is that the sound on a DivX is usually VBR and TMPG can't handle audio sources properly if there's a Variable BitRate.

BTW, I don't know what you mean about the framerate for SVCD being 29.97. All of the one's I've made are 23.976. But it may be that my standalone plays them and others don't? Anyway, it doesn't seem like you should HAVE to convert the framerate. Leave it at 23.976.

[zero_net]

ive tried that already!!!!!!

its tmpgenc, it wont encode SVCD in the correct movie lenth, it incodes it at 45:42 and the original file is 45:45 its allways off by 3 seconds unless i encode it at a normal VCD ive tried the audio source full processed uncompressed and regular and tried resaving AVI to a new one uncrompressed and compressed and different audio bitrate and everything else !!!!!!!!!!!!!!!!!!!!!!

[adam]

If the source is 23.976fps then you MUST encode at 23.976fps for SVCD. Do not convert to 29.97fps or you will probably get sync problems everytime and you will certainly get horrible movement problems. I recommend you just load the SVCD NTSCfilm template.

Also, do NOT encode audio and video together. TMPGenc has long since had a bug where mpeg2 is not properly multiplexed when it encodes straight to a program stream (MPG.) Encode the video first, then encode the audio, then multiplex. This may have been the cause of your sync problems.

Also, another thing to consider is the quality of your mpeg2 decoder when playing the mpg. I know from personal experience that the Elucard decoder can cause horrible sync problems during playback. So maybe your mpg actually is in sync. You may want to try burning on cdrw to see how it plays on you hardware player.

[gonzalimator]

sorry for the redundant advice.

Are you using the wizard/template to make the SVCD? Could that be messing things up? I always do it manually. You'll have to load the 'unlock.mcf' in TMPG. Have you done that? If you haven't, it will allow you to set a unique bitrate if you need to or frame rate or resolution. My theory is that the SVCD template might be doing something to the process that isn't necessary. Possibly an Inverse Telecine. Maybe that's the problem.

Forget what I said if you've already done this.

[zero_net]

i tried the inver telecine , i almost got excited when it was in sync for 5 minutes, then it went out.

i have been using the svcd template.

Adam, the tips that u mentioned actually seem like a possibility .
so should save the AVI with virtual dub (no sound) the save the sound with VD as wav,.

then encode the no sound video with tmpgenc to svcd and multiplex it with the wav ?

i am using the elecard mpeg2 codec, thats the only way i could get mpeg2 to play on my cmoputer, i tried nimo codec pack but wouldnt work and installed DivX 5.

where can i download a good codec,

well, im gonna try encoding those seperatly for now.

[gonzalimator]

Just load the avi into TMPG and set your settings. (without the Wizard) Then select what type of stream you wish to create. (lower right of the TMPG window) ES stands for elementary stream. Choose ES Video only or ES Audio only. When you encode your file, you will get an m2v for the video stream. Next you can encode the audio so set the bitrate and sample rate. When the audio is encoded and you'll get an mp2 file for the audio. To multiplex the streams into an SCVD, open up MPG Tools from the File menu in TMPG and choose simple multiplex. Select the video and audio and set the 'Type' setting to "MPEG-2 Super Video CD (VBR)"b Set the output filename and location and click "run".

That's it.

[adam]

Inverse telecine has nothing to do with this.

If you think it may be your decoder that is the problem then you should look into buying a good software DVD player. WinDVD and PowerDVD are very good and pretty reasonable. They have trial versions but I believe they only play a very small portion of the movie.

Maybe try VaroDVD, it might have a time period trial, so you can at least see if its your mpeg2 decoder that is the problem.

Best way to judge if your SVCD is in sync is to just burn a test disk and play it on a hardware player.

[cumminc]

I had same prob for months. Just converted my first film without synch probs.

Firstly i used VDUB and direct stream copied the film and audio together. Don't know what it does but it helped.

Then again using VDUB and the new copy seperate audio WAV, full processing mode and PCM sound, and seperated the video to AVI.

Using besweet used audio file to create an MP" sound file and using the standard TMPGENC NTSFFILM template created an M2V file.

Using TMPGENC they were muxed together and it worked in synch.

Only problem i have is size of file, havn't yet figured out how to compact the file (SVCD) onto one 99 min disk or even if it possible. But it worked after weeks of trying.

One thing i find great is everyone says try this fool proof way, and it never works for me. I really think you have to find the best combination that works for your own system and methodologies. Good luck

[zero_net]

so the mpeg2 decoder does not effect the encoding process right ?

tmpg uses its own ?

[zero_net]

i tried multiplexing the m2v and mp2 together, it does not work!!!! it throws it off by far,


original source is 45:45 after multiplexing its 41:09 !!!!!!!!!!!

[Gazorgan]

The m2v and the mp2 file have to be the same length or it won't work. If they don't match, you didn't do something right.

TMPG doesn't have an MPEG2 decoder, it uses whatever is in windows. This can lead to horrible results since some windows decoders de-interlace.