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In Sony Vegas Pro 10 I've placed an .mp3 file (about 3MB file size), then I've cut it slightly at the end to shorten the length. I've tried to encode it with following settings:

File - Render As  
Save As Type: MP3 Audio  
Template: Default Template  
Description: Audio: 256 Kbps, 44,100 Hz, 16 Bit, Stereo, MP3

The encoded file is about 6MB and it seems that the resulting file is the same quality as original.

How can I render .mp3 without getting a larger file size than the original?

  • OK, the output is 256kbps / 44.1K. But what are the sample rate and bit rate for the original file? – Jim Mack May 13 '15 at 17:09
  • @JimMack, how can I check this data, pls? – qadenza May 13 '15 at 17:12
  • Use Mediainfo. I don't really know Vegas, but it should have some sort of metadata display as well ... – MoritzLost May 13 '15 at 18:43
  • My guess would be that the original file was not recorded at 256kbps, but something lower like 192 or maybe even 128. – user1118321 May 15 '15 at 4:21
1

The settings say Stereo. The doubling of file size might indicate that the original file was mono.

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