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Windows 7: Audio out of sync when playing Videos I created

16 Apr 2013   #1

Microsoft 7x64
 
 
Audio out of sync when playing Videos I created

Hi,

I'm a percussionist and occasionally have to film my self playing drums and other percussion instruments for auditions and other reasons. I record with a Canon Vixia HFR20 and then import the videos to a Mac computer. Once on the Mac I then convert the video files to MPG so that I can import the video to iMovie. Once I import the video to iMovie I edit the film and then export it has an .mp4. Here everything is great. However, once I put the video on a computer running Windows 7, there is immediately audio sync issues. A few years ago I tried doing the editing on my laptop (also tried using my desktop that runs windows 7) in Windows Movie Maker but there was a lot of audio sync issues when I was finished.

Also, if I upload the video to a website, such as vimeo, the video plays fine on any computer when it is being streamed from the site. However, if I send the file to myself (either through a flash drive or web) and try to play it on Windows 7, there is audio sync issues no matter the file type (avi, mpg, mov, etc.). The video plays fine on a mac.

I also tried taking my video from Vimeo that works fine on any PC (When streamed from the site) and downloaded it to my laptop that runs Windows 7. Once I downloaded, I had the same sync issues that I was having before.

Why is this happening and how can I fix it?

Thanks


My System SpecsSystem Spec
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16 Apr 2013   #2

Windows 7, 64 bit Home SP1, Win 8.1.1 Pro 64 bit
 
 

Are you using 16 bit 48Khz for the audio files? That is what commercial studios use for audio, to be in sync with video.

16 bit 44.1Khz is the "CD quality" audio standard and what most PC's are set up for.
My System SpecsSystem Spec
16 Apr 2013   #3

Microsoft 7x64
 
 

Thanks for the reply!

I'm not too sure the exact specifics. I opened the video with a program called "MediaInfo" and it says
"First Audio Stream
English, 128 Kbps, 44.1KHz, 2 Channels, AAC (LC)"

Does that mean the quality of the audio is too much for the PC? Can I change this after I edit the video or does this need to be done when I'm filming?

Thanks again for the help!
My System SpecsSystem Spec
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16 Apr 2013   #4

Windows 7, 64 bit Home SP1, Win 8.1.1 Pro 64 bit
 
 

Te 128Kbps says its an MP3 audio file.

Convert it to 16 bit/48Khz WAV file and try that.
My System SpecsSystem Spec
16 Apr 2013   #5

Windows 7 Ultimate Retail Box (64-bit installed) + Service Pack 1
 
 

My guess is some codec installed is the cause.
My System SpecsSystem Spec
22 Apr 2013   #6

Microsoft 7x64
 
 

Quote   Quote: Originally Posted by fireberd View Post
Te 128Kbps says its an MP3 audio file.

Convert it to 16 bit/48Khz WAV file and try that.
Hi, thanks for your help so far!

Do you have any recommendations for a program that will allow me to convert only the audio? I can only convert the video.

Thank
My System SpecsSystem Spec
23 Apr 2013   #7

Windows 7, 64 bit Home SP1, Win 8.1.1 Pro 64 bit
 
 

The free Audacity recording program will allow saving as different bit rate.

Audacity: Free Audio Editor and Recorder

Goldware, a shareware audio editor will do that.
My System SpecsSystem Spec
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