Audio/Video sync control

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JReykdal
2013-12-20
2014-01-03
  • JReykdal
    JReykdal
    2013-12-20

    We're using Ingex to record from old 1" tapes but the analogue to digital conversion introduces around 6 frame delay to the video (processed seperately as the 1" is 3ch and analogue to sdi is 2ch).

    Is there a way to delay the audio in capture to compensate for this?

    Regards,

    JR

     
  • John Fletcher
    John Fletcher
    2014-01-02

    You could modify the IngexShm::pSecondaryAudio() method and subtract 6 from value of frame.

    Or, more elegantly, you could add an optional audio delay to the capture program (dvs_sdi). Maybe I will do that when I have a moment; are you using DVS or Blackmagic?

     
  • JReykdal
    JReykdal
    2014-01-02

    We're using DVS.

     
  • John Fletcher
    John Fletcher
    2014-01-03

    OK, I have added an option to dvs_sdi
    -adelay frames

     
    Last edit: John Fletcher 2014-01-03
  • JReykdal
    JReykdal
    2014-01-03

    cool!

    I'll test it on monday.

    JR