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Blackmagic Forum • View topic - SDI distribution latency
https://forum.blackmagicdesign.com/viewtopic.php?t=57490#:~:text=Adding%20non%20scaling%20converters%20and%20a%20sdi%20da,varible%20delay%20will%20help%20matching%20up%20the%20audio
Audio Delay on SDI with embedded Audio
https://forums.vmix.com/posts/t27911-Audio-Delay-on-SDI-with-embedded-Audio
I'm ingesting HD-SDI (720p59.9) with embedded Audio using a BM Decklink Duo 2 into vMix (720p59.9 project) . The audio is perfectly in sync with the video (mixing console video out is delayed to compensate). I can verify this with a BM Hyperdeck which is recording the incoming signal (both devices are connected to a SDI Matrix).
Audio sync troubles: audio delayed in SDI output
https://forums.vmix.com/posts/t325-Audio-sync-troubles--audio-delayed-in-SDI-output
The audio received through the SDI has a starting delay from the video about 50 ms, and increases about 160ms/hour. 2.- vMix Settings -> External Output -> Audio Device: "Blackmagic SDI"; Input Audio Device: "Stereo Mix" The audio received through the SDI has a negligible starting delay from the video, and increases about 80ms/hour.
7.13 Embedded Audio in SDI | Digital Interface Handbook ...
https://flylib.com/books/en/4.485.1.109/1/
The buffering stages cause the audio to be delayed with respect to the video by a few milliseconds at each insertion. Whilst this is not serious, Level I allows a delay-tracking mode which allows the embedding logic to transmit the encoding delay so a subsequent receiver can compute the overall delay.
VIDEO SYNC AND AUDIO DELAY – NewTek Knowledge Base
https://support.newtek.com/hc/en-us/articles/218384108-VIDEO-SYNC-AND-AUDIO-DELAY
VIDEO SYNC AND AUDIO DELAY. Audio and video arriving at TriCaster inputs will maintain sync throughout the system to output or recording. However upstream issues can occasionally cause video to arrive at TriCaster’s inputs later than the corresponding sound. SDI output from a camera can include embedded audio.
HD-SDI delay to match audio? : VIDEOENGINEERING
https://www.reddit.com/r/VIDEOENGINEERING/comments/4rjnfs/hdsdi_delay_to_match_audio/
Most digital PA mixers these days have a tunable delay processor. Another choice is to embed the audio before ingesting into your processing equipment and de embed to go to the PA. 5. level 2. Guyseep. · 5y. most audio embedders allow you to delay or advance audio. Or you can use a framesync to do this as well. 1.
Audio Delay & Video Delay Devices | B&H
https://www.bhphotovideo.com/c/buy/Video-Delays/ci/5721/N/4028759659
Buy Professional Video & Audio Delays from top brands like Allen Avionics, Gra-Vue, For.A and Datavideo. Go to B&H for amazing prices and service.
AV Delay - Wiki
https://wiki.millersville.edu/download/attachments/37946371/AV+Delay+App+Note+How+To.pdf
Audio Video Delay, sometimes referred to as Lip Sync is not new. It was around during the days of analog and has ... Audio SDI Video AES De-embedder Audio System Embedder Dolby E Encoder Dolby E Decoder TG700 HD-SDI HDVG7 module SD-SDI …
AV Delay - PHABRIX
https://www.phabrix.com/solutions/av-delay/
The differential delay between the video and the selected audio is measured in 0.1ms steps (to an accuracy of 1ms) with an operating range of +/-400ms. The generator tool can be used to offset the source audio by up to 40 frames which can be used to extend the measurement operating range to over +/- 1 second.
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