Why does AVI file balloon upto 40gb after one edit? -Sound Forge - PC

Subject:Why does AVI file balloon upto 40gb after one edit? Posted by: Kevmiami Date:12/6/2002 9:55:06 AM Hello, I'm new to Sound Forge; why does a 5gb avi file balloon upto over 40gb after just one edit? This makes editing sound on large video files very difficult. Is it better to render to mpeg2 and then edit? Thanks for the help; looks like a nice program. Kevin.
Subject:RE: Why does AVI file balloon upto 40gb after one edit? Reply by: Sonic Date:12/6/2002 10:06:47 AM Is the audio and or video compressed? What is the edit? How are you determining file size? Are you saving back to an uncompressed format? My guess is you are. One rather troublesome problem in Sound Forge 6.0 is that it can't derive compression parameters to resave the file to just by opening it, so when you Save a compressed file, you should get the Save As dialog and have to select the proper codec to get the same compression. The next version of Sound Forge will be smarter about this. J.
Subject:RE: Why does AVI file balloon upto 40gb after one edit? Reply by: Kevmiami Date:12/6/2002 10:36:40 AM Hi, This sounds helpful. It is an avi file that was created in premiere (DV for NTSC 4:3 16 bit audio). I'm editing it vegas video, but wanted to use amplituted modulation on the camera person's voice (way too loud). I couldn't figure out how to use that in Vegas. When the file resaved it went from about 5gb to over 40gb. I was orig. trying a 9gb file and ran out of hard disk space. If I select NTSC DV (uncompressed) will that maintain the file size? Does this affect the quality of the sound/video? Thanks for the VERY prompt help. Take care, Kevin.
Subject:RE: Why does AVI file balloon upto 40gb after one edit? Reply by: Sonic Date:12/6/2002 4:18:19 PM 1) Amplitude modulation is an effect. If all you want to do is lower the voice, use the track volume or a volume envelope in Vegas and re-render the file in there with the desired compression parameters. 2) Even if you want to use an effect like Amplitude Modulation, you can use the Apply Non-Real-Time Event FX (Vegas 3.0 and later) 3) Even if you want to take it into Sound Forge, select the audio event and use "Open Copy in Sound Forge" instead of just "Open in Sound Forge" and Vegas will create a new audio-only take and send that to Sound Forge for editing. NTSC DV is a video compression format. Only the audio is uncompressed. For more in-depth discussion, re-visit the Vegas help file and take a stroll through the Vegas Video forums. J.

Subject:Why does AVI file balloon upto 40gb after one edit?

Posted by: Kevmiami

Date:12/6/2002 9:55:06 AM

Hello,

I'm new to Sound Forge; why does a 5gb avi file balloon upto over 40gb after just one edit? This makes editing sound on large video files very difficult. Is it better to render to mpeg2 and then edit? Thanks for the help; looks like a nice program. Kevin.

Subject:RE: Why does AVI file balloon upto 40gb after one edit?

Reply by: Sonic

Date:12/6/2002 10:06:47 AM

Is the audio and or video compressed? What is the edit? How are you determining file size? Are you saving back to an uncompressed format? My guess is you are.

One rather troublesome problem in Sound Forge 6.0 is that it can't derive compression parameters to resave the file to just by opening it, so when you Save a compressed file, you should get the Save As dialog and have to select the proper codec to get the same compression.

The next version of Sound Forge will be smarter about this.

J.

Subject:RE: Why does AVI file balloon upto 40gb after one edit?

Reply by: Kevmiami

Date:12/6/2002 10:36:40 AM

Hi,

This sounds helpful. It is an avi file that was created in premiere (DV for NTSC 4:3 16 bit audio). I'm editing it vegas video, but wanted to use amplituted modulation on the camera person's voice (way too loud). I couldn't figure out how to use that in Vegas. When the file resaved it went from about 5gb to over 40gb. I was orig. trying a 9gb file and ran out of hard disk space. If I select NTSC DV (uncompressed) will that maintain the file size? Does this affect the quality of the sound/video? Thanks for the VERY prompt help. Take care, Kevin.

Subject:RE: Why does AVI file balloon upto 40gb after one edit?

Reply by: Sonic

Date:12/6/2002 4:18:19 PM

1) Amplitude modulation is an effect. If all you want to do is lower the voice, use the track volume or a volume envelope in Vegas and re-render the file in there with the desired compression parameters.

2) Even if you want to use an effect like Amplitude Modulation, you can use the Apply Non-Real-Time Event FX (Vegas 3.0 and later)

3) Even if you want to take it into Sound Forge, select the audio event and use "Open *Copy* in Sound Forge" instead of just "Open in Sound Forge" and Vegas will create a new audio-only take and send that to Sound Forge for editing.

NTSC DV *is* a video compression format. Only the audio is uncompressed. For more in-depth discussion, re-visit the Vegas help file and take a stroll through the Vegas Video forums.

J.