2 Replies Latest reply on Mar 30, 2013 7:22 AM by John T Smith

    Audio drifting within Premiere


      I've recently been trying to deal with this issue and I'm totally lost. Scouring the internet hasn't brought about resolution. I've been capturing gameplay footage using a Roxio Game Capture HD Pro and using Premiere Pro CS6 to edit it. Sometimes I run into an issue where, after importing my footage into Premiere, the audio drifts in and out of sync from the video (not a constant rate). Sometimes it will be in sync in places, other times it will be several seconds off. The length of the audio and video are the same. The only way I've been dealing with this is to constantly trim and move sections of audio around when I notice the drift, but this creates gaps in the sound, or sections where two sections of audio overlap from trimming/moving to maintain sync. It's not at all a sustainable work-around.


      The part that's really confusing me is that this is only happening when I'm playing the footage in Premiere. When I open the source footage in any media player the sync is fine all the way through.


      Details from one of the clips I've been having issues with:



      length: 20:45


      data rate: 14063kbps

      total bitrate 14072kbps

      29 fps



      bit rate: 9kbps


      48 kHz


      .m2ts avchd, h264 codec


      Sequence settings are the same in Premiere.


      Anyone have any solutions?

        • 1. Re: Audio drifting within Premiere
          scribbles1222333 Level 1

          Update: I've been thinking for a while this might have something to do with a video glitch I've been encountering when recording on the Wii/Wii U. I've posted 3 screengrabs from premiere illustrating some of the distortion that occasionally pops up.








          Something weird about it is that when I scrub forward 1 frame in Premiere to see how the image in that single frame is distorting I'll see the distorted image for about 2 seconds and then the image in the preview will change, but I'll be on the same frame according to premiere, and the time on the preview will be the same.


          I still don't understand why that problem would manifest in audio drift that only shows up when I go to edit in Premiere, but not when I play back the original video file in VLC/WMP/Gom Player.


          Also, here is some more detailed info about the original video that I'm trying to edit:



          ID                                       : 0 (0x0)

          Complete name                            : C:\Users\Dave\Desktop\3-28-2013_01 - Copy.m2ts

          Format                                   : MPEG-TS

          File size                                : 2.04 GiB

          Duration                                 : 20mn 45s

          Overall bit rate mode                    : Variable

          Overall bit rate                         : 14.1 Mbps



          ID                                       : 4113 (0x1011)

          Menu ID                                  : 1 (0x1)

          Format                                   : AVC

          Format/Info                              : Advanced Video Codec

          Format profile                           : High@L4.0

          Format settings, CABAC                   : Yes

          Format settings, ReFrames                : 2 frames

          Format settings, GOP                     : M=3, N=15

          Codec ID                                 : 27

          Duration                                 : 20mn 45s

          Bit rate mode                            : Variable

          Bit rate                                 : 13.2 Mbps

          Maximum bit rate                         : 16.2 Mbps

          Width                                    : 1 920 pixels

          Height                                   : 1 080 pixels

          Display aspect ratio                     : 16:9

          Frame rate                               : 29.970 fps

          Color space                              : YUV

          Chroma subsampling                       : 4:2:0

          Bit depth                                : 8 bits

          Scan type                                : Progressive

          Bits/(Pixel*Frame)                       : 0.212

          Stream size                              : 1.91 GiB (93%)



          ID                                       : 271 (0x10F)

          Menu ID                                  : 1 (0x1)

          Format                                   : AAC

          Format/Info                              : Advanced Audio Codec

          Format version                           : Version 4

          Format profile                           : LC

          Muxing mode                              : ADTS

          Codec ID                                 : 15

          Duration                                 : 20mn 44s

          Bit rate mode                            : Variable

          Bit rate                                 : 217 Kbps

          Channel(s)                               : 2 channels

          Channel positions                        : Front: L R

          Sampling rate                            : 48.0 KHz

          Compression mode                         : Lossy

          Delay relative to video                  : -67ms

          Stream size                              : 32.2 MiB (2%)

          • 2. Re: Audio drifting within Premiere
            John T Smith Adobe Community Professional & MVP

            >Bit rate mode : Variable


            This is NOT about your process, but it does talk about Premiere (can't remember if this is about Pro or Elements) not editing variable bit rate files


            Iphone won't edit easily because it uses a variable frame rate - A fix in message #22 http://forums.adobe.com/thread/934466


            I will GUESS that you have the same problem