Loop/ Audio- problem


    Feb 12 2007 | 3:56 am
    hi,
    When my videos are in loop, there is always one click in my audio? what should it be? I worked with Final Cut Pro to create perfect audio loop and the click is not there, neither in the quicktime player... I can't figure out why with jitter the click is always coming back. any suggestion...
    attached is my patcher
    Many thanks,

    • Feb 12 2007 | 6:19 am
      Hi all,
      Revisiting an old, reoccurring thread...
      How to get hi-resolution recordings out of Jitter:
      It occurred to me today that finally a solution is available, and its even cheap(!)
      You may have seen Decklink's recently released 'Intensity' HDMI card http://decklink.com/products/intensity/ which is designed to work with a number of HDV camera that have uncompressed HDMI output (such as Sony HC3) the card is a mere $250
      The lightbulb lit in my head when I remembered that with a simple DVI- I to HDMI adapter (or cable), available at any electronics store, graphics cards (at least my last few Macs) enable 1080i/720p legal resolutions - I know this from using such a setup with a consumer HDTV with HDMI input.
      So there you have it... all you need is a PCI-e Mac or PC, the Intensity board, and then the computer of your choice to run your Jitter patches, and you can realtime record uncompressed 1920x1080i YUV 4:2:2 (caveat of course you'll also want to have a raid capable of recording that high datarate)
      This is untested, but I have every reason to believe it works. Thought I would pass it along since there are plenty of people who've been wishing for this capability.
      cheers,
      DeKam
    • Feb 12 2007 | 6:28 am
      Thanks for the info. I talked to who knows how many freaking AV companys in LA this fall and no one had a solution for this kind of problem. Seems like it would work. Hopefully someone can trty it out in the near future and report back to the list. One good suggestion I did get was to get a striped RAID for recording and then have a system of swappable slower SATA drives for dumping the data to after the recording was done in order to minimize cost by buying as few as possible fast RPM hard disks.
      wes
      On 2/11/07, dekam wrote: > Hi all, > > Revisiting an old, reoccurring thread... > > How to get hi-resolution recordings out of Jitter: > > It occurred to me today that finally a solution is available, and its > even cheap(!) > > You may have seen Decklink's recently released 'Intensity' HDMI card > http://decklink.com/products/intensity/ which is designed to work > with a number of HDV camera that have uncompressed HDMI output (such > as Sony HC3) the card is a mere $250 > > The lightbulb lit in my head when I remembered that with a simple DVI- > I to HDMI adapter (or cable), available at any electronics store, > graphics cards (at least my last few Macs) enable 1080i/720p legal > resolutions - I know this from using such a setup with a consumer > HDTV with HDMI input. > > So there you have it... all you need is a PCI-e Mac or PC, the > Intensity board, and then the computer of your choice to run your > Jitter patches, and you can realtime record uncompressed 1920x1080i > YUV 4:2:2 (caveat of course you'll also want to have a raid capable > of recording that high datarate) > > This is untested, but I have every reason to believe it works. > Thought I would pass it along since there are plenty of people who've > been wishing for this capability. > > cheers, > > DeKam > > >
    • Feb 12 2007 | 7:55 pm
      This will work. I spoke with Decklink about their card when it came out, and it will only support broadcast formats and framerates. If you wish to use this card you must output your DVI at 1920x1080 interlaced @ 60Hz, 50Hz, or 1280x720 progressive at 60Hz. Any other resolutions will not work.
      But yeah, its definitely a great option. Also note that Decklink supports Native QT capture components. Ive used their cards and AJAs cards to input uncompressed HD into Jitter via jit.qt.grab. Its really nice - the quality is outstanding. Note you need a LOT of bandwidth to record uncompressed 1080 (on the order of 200MB/s) should you want to. Apples XRaid is quite nice for that.
      Anyway..
    • Feb 13 2007 | 2:14 pm
      thanks vade for the confirmation
      after reading the manual available online, it notes that you don't necessarily have to record in uncompressed format, it supports realtime record to compressed formats eg photojpeg (but this is done on the cpu, not the board) A 2 drive sata stripe could suffice if one is willing to live with some spatial compression.
      -deKam
      > But yeah, its definitely a great option. Also note that Decklink > supports Native QT capture components. Ive used their cards and > AJAs cards to input uncompressed HD into Jitter via jit.qt.grab. > Its really nice - the quality is outstanding. Note you need a LOT > of bandwidth to record uncompressed 1080 (on the order of 200MB/s) > should you want to. Apples XRaid is quite nice for that.
    • Feb 14 2007 | 12:26 pm
      Quote: Exo wrote on Mon, 12 February 2007 04:56 ---------------------------------------------------- > hi, > > When my videos are in loop, there is always one click in my audio? what should it be? I worked with Final Cut Pro to create perfect audio loop and the click is not there, neither in the quicktime player... I can't figure out why with jitter the click is always coming back. > any suggestion... > > attached is my patcher > > Many thanks, > > ----------------------------------------------------
      Hi Exo, to get serious about audio you'll have to use MSP. So load you movie in a jit.qt.movie, set vol to 0, import the movie to buffer~, then sync the two.
      Cheers, Mattijs