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    Syncing life video stream with external audio

    How To... ?
    live stream audio sound obs video
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    • tomthebom
      tomthebom last edited by Woland

      Hallo Isadoristas, I need some help.

      Yesterday I streamed a live concert from my school through OBS to FB. The sound engineer refused to give me his better quality audio signal due to the delay to be expected.
      I ended up using my own primitive microphone to record my "own" audio signal. It worked, but I am not satisfied. 

      It made me think: Could one use Isadora to delay the life video to sync it with its external recorded audio?

      Could Izzy measure the delay itself and sort this out (and send it out to Spout/Syphon and into OBS?)

      How would you do this?

      Best wishes to the lovely community, 

      Tom

       

      Izzy 3.2.6 ARM on MBP14'/2023/M2 Pro/ macOS 13.5

      Fred 1 Reply Last reply Reply Quote 0
      • dbini
        dbini last edited by

        i think it doesn't matter what your audio source is, FB delays the audio to sync it to the video. there's a 30 second delay whilst the video gets encoded, but the audio is always in sync. check out how it can be used creatively
        the problems come when you want to use different streaming systems for audio and video. i once did a show where the musician was in a different country, using SoundJack to get his audio onto stage. the latency of this was about 2 seconds less than the VOIP system we used for the video, so we had to factor that into how the performance worked. i tried out using a Video Delay in Isadora to try to sync things up, but, in the end, it wasn't necessary. (SoundJack now has a video option as well as audio, but i haven't tried it yet)

        John Collingswood
        taikabox.com
        2019 MBPT 2.6GHZ i7 OSX15.3.2 16GB
        plus an old iMac and assorted Mac Minis for installations

        tomthebom 1 Reply Last reply Reply Quote 0
        • Fred
          Fred @tomthebom last edited by

          @tomthebom OBS has both audio and video delay capabilities. Maybe it is easier to do it there.

          http://www.fredrodrigues.net/
          https://github.com/fred-dev
          OSX 13.6.4 (22G513) MBP 2019 16" 2.3 GHz 8-Core i9, Radeon Pro 5500M 8 GB, 32g RAM
          Windows 10 7700K, GTX 1080ti, 32g RAM, 2tb raided SSD

          tomthebom 1 Reply Last reply Reply Quote 0
          • tomthebom
            tomthebom @dbini last edited by

            @dbini I am not talking about the delay between sending/streaming and being published. I am talking about, how to sync a video with a delayed audio BEFORE it gets published via OBS to FB.If the stream does not provide a synced audio with video it will be the same once it is published on FB...

            Izzy 3.2.6 ARM on MBP14'/2023/M2 Pro/ macOS 13.5

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            • tomthebom
              tomthebom @Fred last edited by

              @fred

              Thanks for the tip. I found it under Edit/advanced Audio Properties. That should make it easy to solve the problem through OBS.

              Sorry for being stuborn, but my question was more focused on, how to solve a problem like this in Isadora... ;o)

              Izzy 3.2.6 ARM on MBP14'/2023/M2 Pro/ macOS 13.5

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              • Woland
                Woland Tech Staff last edited by

                @mc_monte Has been doing a bunch of tricky things with streaming video with synched audio and may have some insight.

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