Apologies for such a long first post!
I captured nearly 60 VHS cassettes with VirtualDub using a JVC HR-S8960 S-VHS (although my videos are standard VHS cassettes) which has a Time Base Corrector with Digital Noise Reduction, did some basic cutting in VirtualDub and eventually had approximately 300 clips! (There were a lot of duplications, as I made a separate series per child). I used the Lagarith codec to compress. This was hours and hours of work. I have grouped them in separate groups and want to improve the quality with different AviSynth scripts as much as I can. (This was my second attempt-I made an error of some sort a previous time and the quality was very bad.) This project has been going on for 15 months or more.
Unfortunately, I did not check the audio-video sync during this process.(I worked with VirtualDub all the time and never exported to a NLE). These clips are out of sync in most of the clips. The sync difference varies between -400 to -1500ms, as measured by VLC media player.
After researching, posting, asking, etc; I found that the easiest way to solve the sync issue is to play a clip in VLC media player and with the shortcut “J” or “K” find the difference between audio and video. (If for e.g you play the video in VLC, one presses for instance “J” and this delays the audio by 50 ms. If one keeps pressing “J”, the delay jumps in 50ms per press). The value that I got by doing this method, I then load in VirtualDub (e.g. -700ms) and saved the clip. I corrected quite a few clips, eventually encoded them with TMPGEnc Video Mastering Works 5 and played the DVD on TV. The results were quite good.
I would like to know if there is a possibility to play a clip in VLC and Audacity at the same time, probably splitting audio and video, as I really struggle with some clips to find the correct sync difference. If it is possible, one would be able to sync the audio quite well with the video, especially if there is a loud noise, etc.
I am not at home this month and need to use my laptop for this. My desktop is much better, but, I have time to do it now.
My laptop:
Fujitsu Lifebook s760
Windows 7 Professional (x64) Service Pack 1 (build 7601)
2.13 gigahertz Intel Core i3 M 330
Multi-core (2 total)
Hyper-threaded (4 total)
3892 Megabytes Usable Installed Memory
Here is the MediaInfo of one clip:
General
Complete name : C:UsersUserVideos1a. Projek Des 20121986troue 1.avi
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 2.14 GiB
Duration : 5mn 54s
Overall bit rate : 51.9 Mbps
Writing library : VirtualDub build 32842/release
Video
ID : 0
Format : Lagarith
Codec ID : LAGS
Duration : 5mn 54s
Bit rate : 50.4 Mbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 5:4
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Bits/(Pixel*Frame) : 4.861
Stream size : 2.08 GiB (97%)
Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 1
Duration : 5mn 54s
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 64.9 MiB (3%)
Alignment : Aligned on interleaves
Interleave, duration : 40 ms (1.00 video frame)
Interleave, preload duration : 500 ms
Would this be possible or are there other possibilities e.g. VirtualDub or one of the NLE’s? I have Sony Vegas, but struggle to see the audio line properly.
Thanks!