5 Replies Latest reply on Aug 18, 2013 8:06 AM by Jim_Simon

    Audio drift with HDV (25fps 48k) footage and split field recorder audio (48k)

    voxxy123

      Split audio and audio from captured footage start synced but split sound drifts increasinly over time.

       

      I've tried with 24bit (audio) as it was captured on field recorder and a 16bit converted file - same issue.

       

      Weirdly, when I time compress split audio (100.4%) - waveforms visually line up but when rendered or playedback, drift is STILL THERE ie - even if I play back split audio only, I'm hearing playback drifting/delayed by a second or two towards the end of the hour long shot. So audio corresponding to peaks in waveform happens (increasingly) well after playhead hit and passes the peak. (I hope that makes sense)

       

      Any suggestions? I've already missed a deadline because of this issue. Thanks in advance.

       

      VIDEO

      ***** Analyzed File Results *****

      *** General Parameters ***

      - Name:  PRISM talk OOC Melb.mpeg

      - Container:  Mpeg Transport Stream

      - Size:  12.133 GB

      - Duration:  1h 2mn

      - Bitrate:  26.1 Mbps

       

      *** Video Track Parameters ***

      - Format:  MPEG-2 Video

      - Bitrate:  Max.: 25.0 Mbps / Average: 24.4 Mbps / Min.: Undefined

      - Frame rate (fps):  Max.: Undefined / Average: 25.000 / Min.: Undefined

      - Encoding profile:  Main@High 1440

      - Image size:  1440*1080

      - Pixel Aspect Ratio:  Undefined

      - Display Aspect Ratio:  16:9

      - Interlacing:  Progressive

       

      *** First Audio Track Parameters ***

      - Format:  Mpeg-1 layer 2 (mp2)

      - Bitrate:  384 Kbps

      - Resolution:  Undefined

      - Rate:  48.0 KHz

      - Channel(s):  2 (stereo)

      - Position:  Undefined

       

      *** Miscellaneous ***

      - Subtitle(s): No Subtitle

      - Album: Undefined

      - Performer: Undefined

      - Genre: Undefined

      - Encoded date: UTC 2012-10-14 12:41:03

      - Album artist: Undefined

       

      AUDIO

      ***** Analyzed File Results *****

       

      *** General Parameters ***

      - Name:  1004.WAV

      - Container:  Microsoft Wave

      - Size:  2.309 GB

      - Duration:  2h 13mn

      - Bitrate:  2 304 Kbps

       

      *** Video Track Parameters ***

      - Format:  No video track

      - Bitrate:  

      - Frame rate (fps):  

      - Encoding profile:  

      - Image size:  

      - Pixel Aspect Ratio:  

      - Display Aspect Ratio:  

      - Interlacing:  

       

      *** First Audio Track Parameters ***

      - Format:  Uncompressed PCM

      - Bitrate:  2 304 Kbps

      - Resolution:  24 bits

      - Rate:  48.0 KHz

      - Channel(s):  2 (stereo)

      - Position:  Undefined

       

      *** Miscellaneous ***

      - Subtitle(s): No Subtitle

      - Album: Undefined

      - Performer: Undefined

      - Genre: Undefined

      - Encoded date: 2012:10:14 13:03:52

      - Album artist: Undefined