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Sub-Millisecond Audio Delay Lip Sync Testing in 4K HDR at 59.940 fps v1 

limesandstripes
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This video demonstrates a practical technique for testing audio delay and lip sync using the HDR10 standard at a 23.976 frames per second (fps) refresh rate. By leveraging the HDR10 metadata to transmit timing information, this method is capable of achieving high precision lip sync measurements, with sub-millisecond accuracy.
Instructions:
1. Pause the video. (which you can do with the pause button or by pressing Space or K).
2. You can nudge the video by a single frame. The first (,) nudges you back a frame in the video. The second (.) nudges you forward one frame.
J and L, by the way, move you 10 seconds at a go.

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28 авг 2024

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Комментарии : 19   
@spudtaters8419
@spudtaters8419 26 дней назад
This is an amazing idea for a test. Thanks for much! Glad my system is working....
@jonathanparle8429
@jonathanparle8429 4 месяца назад
This is THE best test. I have tried others and before you know it your eyes and brain tire, your brain starts to scramble and you start to question what you are even seeing. I have previously found it very easy to get the lip sync perfect for any real world test (i.e a film) but getting the actual equipment calibration correct perfect across all devices being used is impossible without a good test.
@generaljericho889
@generaljericho889 Месяц назад
Maybe you can help: When I use my Bluetooth headphones with my Nvidia Shield, the lips and sound in movies are not in sync. I can manually for example with Kodi change the audio latency ("ms"). How do I get it quite right? I believe it's around 200 ms latency, but I'm not sure
@johnjennings7999
@johnjennings7999 Год назад
Best sync test on RU-vid! I had some issues where I had different sync between 2.0 and 5.1, so having all available was very helpful! Thank you!
@limesandstripes
@limesandstripes Год назад
I made another one which is simpler. Uploading now and should be available soon!
@johnjennings7999
@johnjennings7999 Год назад
@@limesandstripes Looking forward to it!
@limesandstripes
@limesandstripes Год назад
It should be up now. I added three more videos! I have two 5.1 tests - however RU-vid doesn't support 5.1 yet for uploads - just streaming content. If/when they do I'll upload those.
@johnjennings7999
@johnjennings7999 Год назад
@@limesandstripes ah! Smarttube Next on my Android TV was exposing 4 different audio codec choices for the video, two of them listed as 5.1 (Can't remember them now, but Opus, M4A, MP4 and something else I think) Weird! One of them required different sync settings on my a/v setup. Not sure what that is about! Edit// Actually, even the regular youtube client on my TV was showing a 5.1 toggle on/off button in the quality settings...
@stefanotoffolo6721
@stefanotoffolo6721 2 года назад
Helpful! I played the clip on my smart TV and I recorded it with my smartphone @ 60 fps. Then, I found the exact AV Sync with the help of a video editing software: the calibration (delay) was correct when the slider and audio peak matched at 0 ms.
@limesandstripes
@limesandstripes 2 года назад
Glad it was helpful!
@Mrharryprosser
@Mrharryprosser Месяц назад
Change the video speed settings to 0.25 to get precise matching with bottom scan. 😊 Speed setting not available 😠in the Foxtel/Google App.
@brydon10
@brydon10 Год назад
The three different speeds really help visualize the sync. Why is the title 24fps when the video is 60fps? Thanks.
@limesandstripes
@limesandstripes Год назад
Cause I messed up the title. Fixed now :) thanks!
@brydon10
@brydon10 Год назад
@@limesandstripes Do you have any download link to the original file? Do you think just downloading it through a youtube video downloader would maintain accuracy? Thanks.
@limesandstripes
@limesandstripes Год назад
I don’t have a download link for this video. Since this is just a sync tone video the RU-vid quality will be just fine for such a test.
@jackf2475
@jackf2475 Год назад
Nice and handy, though beeps are a little too close if you are dealing with equipment that has a big delay
@limesandstripes
@limesandstripes Год назад
I uploaded a few other flavors of the same test. Give those a try and let me know what you think!
@hawgwild5456
@hawgwild5456 9 месяцев назад
Any tips on how to use this?
@truriquelme7266
@truriquelme7266 7 месяцев назад
Video qlo está desfasado
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