cutting using virtual dub

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  • vik_pa
    Junior Member
    Junior Member
    • Jul 2003
    • 45

    cutting using virtual dub

    i needed to cut a divx movie file in 2 so i decided to use virtual dub. when i loaded the file into vdub a message appeared in a window titled VBR Audio Stream Detected:

    VirtualDub has detected an improper VBR audio encoding and will rewrite the audio header with standard CBR values. This may introduce up to 19122ms of skew from the video stream

    I thought nothing of the message and proceeded to cut the file in half. However when I played back the cut file the audio was behind the video by about 10 seconds. Therefore I proceeded to follow the instructions in the following url
    Find out how to cut an AVI file into several parts

    However my B-A value is 0 and the guidelines did not work. What do I do???
  • setarip
    Retired
    • Dec 2001
    • 24955

    #2
    Use either NanDub or VirtualDubMOD (different than VirtualDub) to cut .AVIs containing Variable Bitrate ("VBR") audiostreams...

    Comment

    • vik_pa
      Junior Member
      Junior Member
      • Jul 2003
      • 45

      #3
      Do you have a link to a tutorial on how to cut files with VirtualDubMOD?

      Comment

      • UncasMS
        Super Moderator
        • Nov 2001
        • 9047

        #4
        you will have to select the part that you want to save as one part/half of your movie and then use file => save as

        take a look at the end of my guide for details

        LINK

        Comment

        • setarip
          Retired
          • Dec 2001
          • 24955

          #5
          Just a little more detailed explanation

          Cutting with VirtualDub (or any of its variants)


          1)Load your original (DivX-compressed or otherwise) .AVI into VirtualDub
          2) Set BOTH "Video" and "Audio" to "Direct Stream Copying"
          3) Move slider to the starting point of the scene you wish to delete
          4) From the "Edit" dropdown menu, select "Go to next keyframe"
          5) From the "Edit" dropdown menu, select "Set Selection Start"
          6) Move slider to the ending point of the scene you wish to delete
          7) From the "Edit" dropdown menu, select "Go to next keyframe"
          8) From the "Edit" dropdown menu, select "Set Selection End'
          9) From the "Edit" dropdown menu, select "Delete frames"
          10) Save with a new filename

          Comment

          • shiny#3
            Digital Video Master
            Digital Video Master
            • Jul 2003
            • 1000

            #6
            to setarip:

            this works for virtual dub and nandub.

            the new virtualdub mod does not have any audio dropdown menue anymore!!!

            regards....

            Comment

            • setarip
              Retired
              • Dec 2001
              • 24955

              #7
              To shiny#3

              "the new virtualdub mod does not have any audio dropdown menue anymore!!!"

              I'm well aware of the fact that audio attributes are under the "Streams" dropdown menu in VirtualDubMOD. I just haven't decided how to incorporate the appropriate verbiage in this "canned" response.

              I believe the lack of reference to "Streams" has brought rise to additional Q&A from one only poster who has received this response. But I guess I should stop being so lazy and update it ;>}


              !!!

              Comment

              • vik_pa
                Junior Member
                Junior Member
                • Jul 2003
                • 45

                #8
                i have tried it using vdMOD, but the audio is still behind the video???

                Comment

                • setarip
                  Retired
                  • Dec 2001
                  • 24955

                  #9
                  A) If the difference between audio and video is constant throughout the video:

                  Load the file into VirtualDubMod, or NanDub.
                  Set BOTH "Video"(VirtualDubMod and NanDub) and "Audio" (NanDub only - VirtualDubMOD>"Streams>"Stream list) to "Direct Stream Copy".
                  From the "Audio" dropdown menu, select "Interleaving" (For VIrtualDubMOD, rightclick on the listed audiostream and then select "Interleaving")
                  Under "Audio skew correction", set an appropriate number of milleseconds (positive or negative) in the box labelled "Delay audio track by"
                  Save with a new filename

                  B) If the difference increases as the movie plays:

                  From under the "Video" dropdown menu, select framerate - and select "Change so video and audio durations match"

                  Let us know of your success ;>}

                  Comment

                  • UncasMS
                    Super Moderator
                    • Nov 2001
                    • 9047

                    #10
                    Just a little more detailed explanation
                    <== referring to what?

                    Comment

                    • setarip
                      Retired
                      • Dec 2001
                      • 24955

                      #11
                      To UncasMS

                      "<== referring to what?"

                      Referring, of course, to what I posted under that caption (Based on my experience in responding to "vik_pa" in several other threads throughout the various forum categories)...

                      What did you think I meant?

                      Comment

                      • UncasMS
                        Super Moderator
                        • Nov 2001
                        • 9047

                        #12
                        i didnt know, that's why i was asking

                        Comment

                        • vik_pa
                          Junior Member
                          Junior Member
                          • Jul 2003
                          • 45

                          #13
                          i have decided to cut the svcd with tmpgenc. is there any difference between cutting avi and cutting mpeg e.g. will cutting avi with vdub result in better quality...

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