Captured AVI video file slowly loses audio sync (lags behind over time)

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Sailor Guy

Member Location: St. Louis, Missouri USA Joined: Aug 19, 2012 10:23 Messages: 73 Offline

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Apr 05, 2018 16:47

I have a problem with the audio track progressively getting out of sync when capturing an AVI video file.

I am producing MP4 videos from five dozen Video Hi8 tape cartridges. Typically, each video is two hours long. I capture the Hi8 video as an AVI file using Pinnacle Studio V14 software and MovieBox HD 510-USB analog-digital video converter connected via a composite R-W-Y video cable to a Sony Video Hi8 camcorder.

As the capture process continues, the audio track slowly starts to lag behind the video until by the end of the 2-hour video, the audio is behind by almost 5 seconds. There is no perceptible loss in video quality or audio fidelity – the audio is just a few seconds behind the video.

I have a few questions:

1) Why is the audio slowly losing sync (lagging behind) over the course of the video capture?

2) How can I avoid the problem or fix the problem in PowerDirector?

I have not experimented much with editing audio tracks, but is there a way to simply “squeeze” or time compress the audio track just a small amount to get the audio to sync up with the video? Or is there a more sophisticated way to do it?

Here are the AVI capture and MP4 output specs:

AVI Capture (Input) Specs:

* Via Pinnacle Studio V14 software and MovieBox HD 510-USB ADVC and Sony Video Hi8 Camcorder using R-W-Y composite cable
* AVI file extension
* 720 x 480 (w x h)
* Aspect ratio: 4:3
* Data rate: 28857 kbps
* Total Bit Rate: 29881 kbps
* Frame rate: 29 frames/second
* Audio bit rate: 1024 kbps
* Channels: 2 (stereo)
* Audio sample rate: 32 kHz

MP4 Output specs:

* Profile Name: Hi8 (720 x 480) to MP4 (1920 x 1080) #1
* Cyberlink PowerDirector 16
* H.264 AVC format
* MP4 file extension
* Aspect ratio: 16:9
* Video
* Resolution: 1920 x 1080 (w x h)
* Frame rate: 29.97 frames/second
* Frame type: Progressive
* Profile type: High Profile
* Entropy coding: CABAC
* Rate control: Average bitrate: 3000 Kbps
* Advanced
* Speed/quality indicator: Quality mode
* Use deblocking - enabled
* Use dynamic GOP - enabled
* Audio
* Audio compression: AAC
* Audio channel: Stereo
* Audio compression rate: 128 Kbps

Thanks in advance for any guidance or feedback.

Sailor Guy PD 16 Ulimate 64-bit 16.0.2313.0; PhotoDir 7 Ultra; Win 10 Home 64-bit; Intel i5-2500K @3.3hGhz; 8 GB; NVIDIA GeForce GTX 560 Ti (4GB); Pinnacle Studio MovieBox HD 510-USB; Canopus ADVC-300; Sony Optiarc AD-7260S DVD; LG BE14 Blu-Ray

PlaySound

Senior Contributor Joined: Dec 02, 2010 10:26 Messages: 2031 Offline

Apr 05, 2018 17:26

Quote I have a problem with the audio track progressively getting out of sync when capturing an AVI video file.

I am producing MP4 videos from five dozen Video Hi8 tape cartridges. Typically, each video is two hours long. I capture the Hi8 video as an AVI file using Pinnacle Studio V14 software and MovieBox HD 510-USB analog-digital video converter connected via a composite R-W-Y video cable to a Sony Video Hi8 camcorder.

As the capture process continues, the audio track slowly starts to lag behind the video until by the end of the 2-hour video, the audio is behind by almost 5 seconds. There is no perceptible loss in video quality or audio fidelity – the audio is just a few seconds behind the video.

I have a few questions:

1) Why is the audio slowly losing sync (lagging behind) over the course of the video capture?

2) How can I avoid the problem or fix the problem in PowerDirector?

ISailor Guy

I can not believe the error was in the capture because it is done in real time.
In PD16 there are some ways to fix this.
1 - The easiest and fastest, stretching the audio to be the size of the video, can correct or not.
To do this, right click on the video and select Link / unlink Video and Audio.
Select only the audio by holding down the key, Ctrl, click on the final edge of the audio, drag to expand the audio and snap to the end of the video.

2 - Select the video, go to the Edit Audio, AudioEditor or WaveEditor button.
Make any, edit in the audio and close by (x) in the upper right corner, confirm.
This process, usually fix problems I think the best thing to do.

This message was edited 2 times. Last update was at Apr 05. 2018 17:45

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