• VEGAS Pro

  .mxf looses audio a few seconds after rendering

  Posted by Steven Conn on March 6, 2012 at 4:33 pm

  Hey everyone, I have a “completed” skiing edit that I am trying to finalize however every time I render it, the audio kick out after a few seconds. I am using Vegas Pro 11.0 (64 bit) and rendering in HD EX 1280×720-60P. I have tried to render it in 720x60i, HD422 1280×720-60p but all of these have the audio cut out almost instantaneously. I shall note that if I render it in internet HD 720p (.mp4), or any .wmv format the audio stays but my super slow motion, twixtor, effects look terrible from the lowered frame rate.

  Any input would be greatly appreciated, I have been searching for hours and sorry if this seems like a rookie problem but this is my first edit! 🙂

  Cheers

  John Bean replied 14 years, 2 months ago 2 Members · 4 Replies
• 4 Replies

• 

  John Bean

  March 6, 2012 at 6:58 pm

  Try rendering out the audio by itself using WAV (uncompressed PCM).

  Then see if this WAV file has any problems.
• 

  Steven Conn

  March 6, 2012 at 8:18 pm

  Ok, I tried that and determined that the wav file is ok. I rendered the video as HD 720-60p YUV (.avi) and the sound issues went away. However this caused a new problem because the 3 minute video is now 15.6 gb! So I need to make the .mxf file work! Any more ideas?

  Thanks for your input Mr. Bean! lol
• 

  John Bean

  March 6, 2012 at 8:36 pm

  There are too many variables involved to figure out what might be the problem.

  Try this for now since you have a deadline.

  1. Render out your video as an AVI using a LOSSLESS codec like LAGARITH. If you don’t have it already, Google it and download it. It’s free.

  Alternatively, you can also use a VISUALLY LOSSLESS codec like Cineform. You’ll get a smaller file size with this codec than LAGARITH. Cineform might already be included in your version of Vegas.

  Set your audio to uncompressed PCM.

  2. Using this AVI, use another encoder to compress it to your desired format.

  Where is this video going to be stored at? A Blu-ray? A website like YouTube? That will affect what compression codec you will want to use for your final delivery.
• 

  John Bean

  March 6, 2012 at 8:53 pm

  You can also try this test:

  1. Start a new Vegas project.
  2. Import your rendered out file into this project.

  Does Vegas show a complete waveform graph of the audio track?

  Can Vegas play a PREVIEW of this video without any audio cut-offs?

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