Videoplayback Audio Problems


    Jan 31 2019 | 9:17 pm
    I am running Max 8.0 on a new PC. I have a very complex patch so there is a lot going on, but I an using jit.movie to playback audio without using jit.movie~ or MSP. I am getting sporadic horrible blown out/scratchy glitching. This is an evolution of a previous project made in Max 7.0 and I am using some of the same files. So, what has changed is I am now using Max 8.0, viddll vs. quicktime, and I have a new laptop. It seems like other people were having trouble with new laptops/openGL and audio problems like this. Can anyone direct me to a thread about the problem, or was that something that got fixed? I have PJPEG with PCM audio files that had previously worked fine, and also some prores LT files made on a MAC from a different person, and both are doing the same thing.

    • Feb 12 2019 | 11:10 am
      There seems to be a major difference between volume 1.0 in a viddl based movie and volume 1.0 in a quicktime based movie. Or at least that is my first stab at fixing the problem. Volume 1.0 used to be the default/acceptable volume and you sort of had to subtract from there to get your levels right. Now, it seems like volume 1.0 can lead to blowing out the signal if the audio is hot. Again, I've got a lot going on and audio and video coming from different contributors, so it makes it hard to figure out the problem. So, volume .7 seems to be a good "safe" level to default to. I'd rather not use movie~ and MSP, since it just adds more strain on framerates, but I may have to do that just to be able to more accurately see what is going on.
    • Feb 12 2019 | 7:59 pm
      for any kind of mixing beyond the most basic, i'd use jit.movie~ and MSP. the cpu load should not be that much different. If you're still having issues, send me a patch and an example movie file.