5 Replies Latest reply on Aug 7, 2011 4:43 PM by the_wine_snob

    Audio drops in preview of .mts file in project

    DLSchiff

      Hi,

      Can you kind folks please help? I've been experiencing preview audio loss while trying to edit .mts HD files. My system meets the requirements, so I'm confused as to why this should be happening.

       

      I've cleaned the cache, opened up a new cache elsewhere, and it still happens.

       

      Please help.

      Thanks!

       

      Best,

      Deb Schiff

      Archivist

      Here and There blog: http://hereandthere123.blogspot.com

        • 1. Re: Audio drops in preview of .mts file in project
          John T Smith Adobe Community Professional & MVP

          >system meets the requirements

           

          Is that the (minimum) requirements to install, or the REAL requirements to actually use the program?

           

          This message has a really good graphic about requirements
          CS5 Requirements http://forums.adobe.com/thread/810750?tstart=0
          About Requirements http://forums.adobe.com/thread/618058?tstart=0
          Disk Configurations http://forums.adobe.com/thread/878419?tstart=0

           

          When you copy the MTS files from your camera to hard drive, are you copying the entire folder, or just the individual files?

           

          What is your exact brand/model camera, and which setting are you using in the camera?

           

          Is there a red line over your timeline?

           

          Which version of Premiere Elements?

          • 2. Re: Audio drops in preview of .mts file in project
            DLSchiff Level 1

            Thanks for your speedy reply, John. My responses are in-line below.

             

            Is that the (minimum) requirements to install, or the REAL requirements to actually use the program? I'm not sure -- those threads below are a bit too technical for me to discern what the actual requirements were. I was going by the installation requirements.

             

            This message has a really good graphic about requirements
            CS5 Requirements http://forums.adobe.com/thread/810750?tstart=0
            About Requirements http://forums.adobe.com/thread/618058?tstart=0
            Disk Configurations http://forums.adobe.com/thread/878419?tstart=0

             

            When you copy the MTS files from your camera to hard drive, are you copying the entire folder, or just the individual files? The whole shebang.

             

            What is your exact brand/model camera, and which setting are you using in the camera? I'm using a Canon Vixia HFM 30, on the HD setting.

             

            Is there a red line over your timeline? Yep. What does that mean?

             

            Which version of Premiere Elements? 7

            • 3. Re: Audio drops in preview of .mts file in project
              John T Smith Adobe Community Professional & MVP

              Your files are AVCHD (as far as I know) and I'm not sure PreEl 7 is going to work very well... I think it is not until version 9 that a preset for AVCHD was added

               

              The red line means your video and your project do not match... and a mismatch causes all sorts of problems

               

              You may need to Convert AVCHD to HDV http://forums.adobe.com/thread/390605?tstart=0
              or use Cineform Neo Scene http://www.cineform.com/neoscene/

              • 4. Re: Audio drops in preview of .mts file in project
                the_wine_snob Level 9

                Deb,

                 

                Welcome to the forum.

                 

                When Audio drops out, one of the first things that I look to, is a failure of the Audio to Conform completely and properly. All Audio must be Conformed, and the PEK files (Waveform Display) must be generated. Conforming creates CFA files, which are what is actually edited and played in PrE. Regardless of the Audio Stream's format and specifications, a CFA is created, and the Audio is converted to 48KHz 32-bit floating point WAV for accurate editing. If this function is stopped, in any way, one usually ends up with truncated Audio, which cuts out at a point - and usually the Waveform goes "flat-line."

                 

                Depending on a lot of factors, the Duration of the Imported file, how far from 48KHz 16-bit the Sample-Rate and the Bit-Depth are and the speed of the computer, this process can be almost instant, or can take a few moments. During the process, there is a small progress bar in the lower-right corner of the program's GUI. If one click+drags the file to the Timeline, or Sceneline, while Conforming is on-going, it will usually stop Conforming and PEK file generation. Depending on certain factors, the program can freeze/hang, and even the computer can freeze/hang. I feel that it is a good workflow to not touch the computer, while Conforming is on-going - just be patient, and watch that progress bar. This ARTICLE will give you more detail.

                 

                Hope that this helps,

                 

                Hunt

                • 5. Re: Audio drops in preview of .mts file in project
                  the_wine_snob Level 9

                  John T.,

                   

                  IIRC, AVCHD support was introduced in PrE 7 (this will be a test of my memory), and even support for DD 5.1 SS existed then, but had to be set with the proper Preset, or little problems would crop up, and especially when one was in Sceneline View Mode. I hopoe that Steve, or others will correct me, should my memory prove faulty.

                   

                  Each version has added additional Presets to completely support more formats and CODEC's.

                   

                  That the OP has red lines, as soon as the Clips are dragged to the Timeline DOES indicate a mis-match between the Preset chosen and the Source Footage. I would Render the Timeline (creates proxy Video and Audio files for smoothest playback), and then test.

                   

                  To the OP,

                   

                  What is the Preset chosen at New Project?

                   

                  Do you have DD 5.1 SS (Surround Sound) setup in the camera?

                   

                  Hunt

                   

                  [Edit] Looking at Steve's FAQ Entry, What's New in PrE 7, it looks like the AVCHD Preset was added in PrE 7.

                   

                  Message was edited by: Bill Hunt - Added [Edit]