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No sound rendering MPEG-2 AC3, .mp4

 
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Dean



Joined: 21 Mar 2006
Posts: 67
Location: Hays, KS

PostPosted: Fri Dec 09, 2011 8:51 pm    Post subject: No sound rendering MPEG-2 AC3, .mp4 Reply with quote

About half the time I render an MPEG-2 audio stream (.ac3) or .mp4 file then go back to play it or use it in DVDA the file won't play. it's done this in Vs. 10 as well. Weird because the files size is the same as when it renders to a playable file.

What I have had to do (which drives me nuts) is to render the audio first and then check it. If it doesen't play then I close Vegas & reopen the project and it will render ok then. Wonder what gives???

New Nvidia Beta driver did not help this issue, might have aggravated it some too.

Here are the results of a failing .ac3 file using MediaInfo:

General
CompleteName : G:\6X47X11.ac3
Format : AC-3
Format/Info : Audio Coding 3
FileSize/String : 39.1 MiB
Duration/String : 28mn 30s
OverallBitRate_Mode/String : Constant
OverallBitRate/String : 192 Kbps

Audio
Format : AC-3
Format/Info : Audio Coding 3
Format_Settings_ModeExtension : CM (complete main)
Duration/String : 28mn 30s
BitRate_Mode/String : Constant
BitRate/String : 192 Kbps
Channel(s)/String : 2 channels
ChannelPositions : Front: L R
SamplingRate/String : 48.0 KHz
BitDepth/String : 16 bits
Compression_Mode/String : Lossy
StreamSize/String : 39.1 MiB (100%)

Any ideas Ed?
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