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.
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.