6 Replies Latest reply on Nov 29, 2009 10:37 AM by the_wine_snob

    AC3 Import Results in 1st 5 Seconds of Audio

    rickhendrickson

      Pr CS4 both 4.0 and 4.2 exhibit same results.

      Process:

      Rename VOB to .mpg

      Import and file is conformed

      Pull to timeline and only first 5 seconds of audio waveform is visible and only first 5 seconds of audio is heard.

       

      Same results using Soundbooth CS4

       

      The base file is from a personal video dvd.

      The audio is on the file as it plays in Windows Media Player and other dvd software players.

       

      Thanks for your thoughts!

       

      Rick

       

      MediaInfo:

      General
      Complete name                    : F:\Video Clips\VIDEO_TS 2\VTS_01_1.mpg
      Format                           : MPEG-PS
      File size                        : 200 MiB

       

      Video
      ID                               : 224 (0xE0)
      Format                           : MPEG Video
      Format version                   : Version 2
      Format profile                   : Main@Main
      Format settings, Matrix          : Default
      Bit rate mode                    : Variable
      Bit rate                         : 9 100 Kbps
      Width                            : 720 pixels
      Height                           : 480 pixels
      Display aspect ratio             : 4:3
      Frame rate                       : 29.970 fps
      Standard                         : NTSC
      Colorimetry                      : 4:2:0
      Scan type                        : Interlaced
      Scan order                       : Top Field First
      Bits/(Pixel*Frame)               : 0.879

       

      Audio
      ID                               : 128 (0x80)
      Format                           : AC-3
      Format/Info                      : Audio Coding 3
      Bit rate mode                    : Constant
      Bit rate                         : 256 Kbps
      Channel(s)                       : 2 channels
      Channel positions                : L R
      Sampling rate                    : 48.0 KHz
      Video delay                      : -67ms

        • 1. Re: AC3 Import Results in 1st 5 Seconds of Audio
          the_wine_snob Level 9

          What happens if you just Import the .VOB's into PrPro CS4.1 (or CS4.2)? If the DVD is 100% DVD-compliant, it should Import perfectly, and no need to change file extensions. Also, consider that the MPEG-2 content in VOB_01 might be very short, as there could be Menus and other navigational material in it. That is why all Menus and their Assets can ONLY be 1GB in size - it has to fit in VOB_01.

           

          Good luck,

           

          Hunt

          • 2. Re: AC3 Import Results in 1st 5 Seconds of Audio
            the_wine_snob Level 9

            This ARTICLE will give you some background on VOB's.

             

            Good luck,

             

            Hunt

            1 person found this helpful
            • 3. Re: AC3 Import Results in 1st 5 Seconds of Audio
              rickhendrickson Level 1

              Thanks for the info Hunt. I will likely need to use the demuxer and a 'combine' the audio and video on the timeline. This footage is being mixed with stills and .mov footage from a different source.

               

              In answer to your question:

              The same thing happens when I attempt to import a .vob. In this case, the file info was posted after my inquiry. The file size is 200meg. The first 5 seconds of the audio is 'conformed' but not the rest. (The same thing happens with a different .vob of 189meg from same DVD.) Why?

               

              Thanks,

              Rick

              • 4. Re: AC3 Import Results in 1st 5 Seconds of Audio
                Harm Millaard Level 7

                Rick,

                 

                In your workflow I miss one thing. You import the VOB. That's good. Now, missing is having a cup a cup of coffee. Next you start editing.

                 

                The missing cup of coffee could be the problem, because PR needs to conform the audio and create PEK files BEFORE you can start editing.

                • 5. Re: AC3 Import Results in 1st 5 Seconds of Audio
                  the_wine_snob Level 9

                  Yes, I ALWAYS have that cup of coffee (decaf, if I will then be editing... ), as Conforming and PEK generation can take some time, depending on the Duration. There is a little blue (in most PrPro versions) progress bar at the lower-right of the GUI. On really stout systems, some can actually edit during this Conforming phase, but most often, the program, or system will lock up, OR the CFA and PEK will only be partial.

                   

                  Now, if you have been very patient, and the blue progress bar has completed for EVERY file Imported, and you STILL get truncated Audio, I am at a loss, as to what is halting this process.

                   

                  IIRC, upthread you mentioned that the DVD was of your creation. Do you recall how it was authored? Also, you are copying over the VIDEO_TS folder to your HDD, and Importing from there, aren't you? Trying to Import from a DVD in the drive has caused issues for many.

                   

                  Just thinking aloud here, and good luck,

                   

                  Hunt

                  • 6. Re: AC3 Import Results in 1st 5 Seconds of Audio
                    the_wine_snob Level 9

                    Should it come to this, here is a FAQ Entry from the Encore forum on ripping from DVD.

                     

                    I also wonder if you can rip just the Audio in Audition. I use it for CDA (Audio CD) material, but do not recall doing so from DVD-Video. If you can, you could then Import the resulting WAV into PrPro, and just drag it to the Timeline.

                     

                    Might be more than one way to "skin this cat?"

                     

                    Good luck,

                     

                    Hunt