out of sync

[apxwv]

i had capture a video(3hours) with WinFast PVR tv tuner and the video is ok. when i try to encode parts of the video the result that i take is out of sync for about 1 sec.

the encoding became with Ulead VideoStudio 8 SE DVD.
the capture video is mpeg and i am trying to encode in mpeg format or xvid format. the audio that i try to encode is mp3 stereo, 44100 KHz and 224kbps. nether with pcm audio format 48000Khz, 16Bit, stereo i don't have good sound result.

what to do?

[DVDDoug]

Search the forums for "sync" and you'll find lots of discussion and suggestions. This problem seems to have multiple causes & solutions. In my case it was caused by corrupted MPEGs, which played-back fine but caused sync problems when rendered or re-multiplexed back to the DVD format.

What format are you capturing in? If your capture device will allow it, capture to AVI/DV format, and convert to MPEG or XVID later (after any editing).

[Ken Berry]

Do you have any program to convert the MP3 audio to .WAV format? If so, you might want to experiment with that. We have had a lot of people having trouble with certain MP3 codecs (particularly LameMP3) which were resolved when they converted to WAV. I acknowledge, though, that the majority of these problems involved VS not being able to recognise the Mp3 at all... But if you have the time, it could be worth a look at.

[caveman]

i had capture a video(3hours) with WinFast PVR tv tuner and the video is ok. when i try to encode parts of the video the result that i take is out of sync for about 1 sec.

the encoding became with Ulead VideoStudio 8 SE DVD.
the capture video is mpeg and i am trying to encode in mpeg format or xvid format. the audio that i try to encode is mp3 stereo, 44100 KHz and 224kbps. nether with pcm audio format 48000Khz, 16Bit, stereo i don't have good sound result.

what to do?

I am not sure if this will help as I use VS 7.5 SE and use to have this syn problem but no more. Here is what works every time for me. Make all your changes. In the final stage when you create your mpg file, do not use "same as project". Change the audio Mpeg sound to LPCM stereo. Thats it. For some reason during the final rendering to create the MPG video it puts everything back in syn. If I leave the audio at Mpeg, it is out of syn. every time especialy if you cut your video alot or use alot of transisions. I have a WinFast PVR also and think it is great.

CP

[Manzano808]

In my case it was caused by corrupted MPEGs, which played-back fine but caused sync problems when rendered or re-multiplexed back to the DVD format.

What format are you capturing in? If your capture device will allow it, capture to AVI/DV format, and convert to MPEG or XVID later (after any editing).

Ok, but is there anything that can be done if you've already captured into MPEG? Sorry for cross-referencing this question [please see "Still More Out of Sync Questions - Please"], but I'm desparate to move all these gigs of mpeg files off of the hard disk.

Maybe it's because i'm a newbie up here?

Thank you very much for any help!

[caveman]

Sorry I did not provide more info. I capture everything in mpeg, audio, video etc. Some like AVI but I realy like using mpeg. Besides my camcorder is an analog. The only thing I change is the quality of the capture and that is soley because of the length of the video. For my camcorder or anything under 1 hr I use vbr 8000 and mpeg audio. Any length which is greater I simply change tthe bit rate. I am sure you have read the recomendation in this forum about aways using the "same as setting".. I don't do that. When I make my final render in the share or create video I then change the audio to LPCM to ensure that it does not get out of syn. It only take a little longer to render but it is worth it. It has always worked every time for me. I do not burn from the VS program . I open the video factory and complete the project there because I can then and slide shows to the video. It just seems to do a go job if you author from video factory. If you like email me and I will explain in more detail about special effects. overlays neat ghosting and great ending to your personal movies.

CP

[Manzano808]

Sorry I did not provide more info. I capture everything in mpeg, audio, video etc. Some like AVI but I realy like using mpeg.

I do not burn from the VS program . I open the video factory and complete the project there because I can then and slide shows to the video. It just seems to do a go job if you author from video factory. CP

Thank you Caveman for this info. I don't have VideoFactory, but can't all that be done using VS? I guess you prefer VF. When I get on my feet a bit more, i'll have to look into this program. In the meantime, i'll try doing what you mentioned using VS9.

Thanks again!

[caveman]

I'm sorry I thought you had Ulead movie factory as it usually ships with Leadteks Winfast PVR. My mistake. Infact I am considering ording the new Winfast PVR from NewEgg as it is hardware incoded and ships with both Uleads movie studio and the Movie Factory. Good luck.

CP

[sjj1805]

Manzanno

Ok, but is there anything that can be done if you've already captured into MPEG? Sorry for cross-referencing this question [please see "Still More Out of Sync Questions - Please"], but I'm desparate to move all these gigs of mpeg files off of the hard disk.

MPEGS are not designed to be edited other than with a specialist MPEG Editor such as Womble or VideoRedo. MPEGs contain something termed Program Time Stamps (PTS) which keep the audio and video in synch.

If you run your MPEGs through one of these programs (30 day free trials available) they may be able to correct the invalid Program Time Stamps that cause your video to be out of synch.

[caveman]

That is strange you believe you can't edit mpegs as I have being doing it for three years with complete success and with out the programs you suggest. I'm not doubting your knowledge as I sure you are very knowledgeable in these matters. Maybe we just have a different definition on editing. Could you please expain. I overlay still pictures, video on top of video,mute, sound over sound etc with out any problem. If the programs use suggest can perform more function then what I am doing I will consider getting them. I am always open to new suggestion that will improve what I am doing. Thank you very much for the info. It was very helpful. I will do some research on the matter. If you could share some more ideals please do as I love to learn all I can. Thanks again.

[sjj1805]

That is strange you believe you can't edit mpegs as I have being doing it for three years with complete success and with out the programs you suggest. ....

Caveman.
Think of it like this.
In the still image world an AVI is like a BMP - it is large in file size, very detailed.
An MPEG is like a JPG - small in file size, compressed and minor details have been deleted.

If you alter a BMP (or an AVI) and resave it, you can do so several times before there is any noticeable degredation in quality it is known as a lossless format.

On the other hand every time you change a JPG (Or an MPEG) and resave it, it gets compressed further and more taken out - it is termed a lossy format.

If you read through the several hundred posts in this forum regarding out of synch issues you will find that in the majority of cases the author has been working with MPEG files. MPEG files mainly suffer out of synch issues where they have been cut and joined together, especially where transitions have been inserted - ie where two clips overlap each other.

It does not mean you cannot edit MPEG files, but you should be aware of the pitfalls, especially the risk of out of synch issues, should you do so.

There are specialist MPEG editors designed to overcome these out of synch issues caused by something called Program Time Stamps (PTS)

Before everyone goes running off to obtain Womble or VideoRedo be aware that these programs, albeit good at what they do, are not as powerful as a full blown Video Editor where you have more tools at your disposal, transitions, colour corrections, picture in picture effects etc.