Video out of sync Options  Watch this topic  Print this topic » Normal Threaded

Previous Topic Next Topic

videologic		#1 Posted : Saturday, April 24, 2010 6:01:10 PM(UTC)
Rank: Advanced Member Groups: Registered Joined: 3/20/2010(UTC) Posts: 31 Location: Amsterdam		Hi, I bought a very tough system (see: http://short.to/271mp) But my audio is out of sync. I've used different camera's. But on my standard DV 3 ccd camera (connect via Insenity Pro) and mic connect via onboard audio-card, I still have audio out of sync. The sync differs in time. In a 5 minute video the audio is sometimes in sync and sometimes 1 second out of sync. Hope you cahelp. Rgds, Daan
User Profile View All Posts by User View Thanks

	Wanna join the discussion?! Login to your vMix Forums forum account, or Register a new forum account.

admin		#2 Posted : Saturday, April 24, 2010 11:30:48 PM(UTC)
Rank: Administration Groups: Administrators Joined: 1/13/2010(UTC) Posts: 5,228 Location: Gold Coast, Australia Was thanked: 4332 time(s) in 1528 post(s)		How is the audio being used in vMix? And where does it go out of sync, in the recording (if so what is the recording format you have setup) or somewhere else?
		WWW BLOG
User Profile View All Posts by User View Thanks

videologic		#3 Posted : Monday, April 26, 2010 3:18:13 PM(UTC)
Rank: Advanced Member Groups: Registered Joined: 3/20/2010(UTC) Posts: 31 Location: Amsterdam		I use the mic input of the internal audio card. Choose in settings-audio for speakers from this card. I goes out of sync in the recording. The recording setup is PAL 50i or 25p / Declink MJPEG compressor. Audio Device : audiop card / audio format 44100 Hz 16 Bit 1 channel Hope you can help. Rgds, Daan
User Profile View All Posts by User View Thanks

admin		#4 Posted : Tuesday, April 27, 2010 1:59:54 AM(UTC)
Rank: Administration Groups: Administrators Joined: 1/13/2010(UTC) Posts: 5,228 Location: Gold Coast, Australia Was thanked: 4332 time(s) in 1528 post(s)		Are any frames being dropped from the recording and how long does it take before it starts to go out of sync? Also give the trial of NeoScene a go from http://www.cineform.com/ and select it as the CineForm Encoder and see if the sync is better.
		WWW BLOG
User Profile View All Posts by User View Thanks

videologic		#5 Posted : Thursday, April 29, 2010 3:39:17 PM(UTC)
Rank: Advanced Member Groups: Registered Joined: 3/20/2010(UTC) Posts: 31 Location: Amsterdam		The sync problem is from the beginning. There are no frames dropped Here some test footage http://www.vimeo.com/11240746 I don't understand what to do with your cineform tip. Can I use this in Vmix ?? or is this to render afterwards ? Rgds, Daan
User Profile View All Posts by User View Thanks

admin		#6 Posted : Thursday, April 29, 2010 10:13:01 PM(UTC)
Rank: Administration Groups: Administrators Joined: 1/13/2010(UTC) Posts: 5,228 Location: Gold Coast, Australia Was thanked: 4332 time(s) in 1528 post(s)		Looking at the vimeo footage it seems fine. It has 3-4 frame delay but that is normal for a live video mixer. The delay can be fixed in post in a video editing program if it is too obvious. As for CineForm, it is a different codec that can be used instead of the DeckLink MJPEG codec. I will investigate if it is possible to adjust the 3-4 frame delay and will let you know the result.
		WWW BLOG
User Profile View All Posts by User View Thanks

videologic		#7 Posted : Saturday, May 1, 2010 4:50:28 PM(UTC)
Rank: Advanced Member Groups: Registered Joined: 3/20/2010(UTC) Posts: 31 Location: Amsterdam		I'm sorry... This is not clear and I need a detailed instruction. - What do I have to download/ buy from cineform ? - How do I install this in vMix ? Rgds, Daan
User Profile View All Posts by User View Thanks

admin		#8 Posted : Saturday, May 1, 2010 10:31:23 PM(UTC)
Rank: Administration Groups: Administrators Joined: 1/13/2010(UTC) Posts: 5,228 Location: Gold Coast, Australia Was thanked: 4332 time(s) in 1528 post(s)		To clarify, CineForm will not resolve the delay. The delay is currently a part of the recording process as the video data arrives slightly after the audio. The best fix at the moment is to edit the recording later in a video editing program and adjust the audio delay.
		WWW BLOG
User Profile View All Posts by User View Thanks

admin		#9 Posted : Sunday, May 2, 2010 3:03:59 AM(UTC)
Rank: Administration Groups: Administrators Joined: 1/13/2010(UTC) Posts: 5,228 Location: Gold Coast, Australia Was thanked: 4332 time(s) in 1528 post(s)		As an update, I can now confirm that the next release of vMix will have an option to set the delay of the audio manually (in milliseconds). This will allow you to do a few test recordings and change the delay value until it syncs up.
		WWW BLOG
User Profile View All Posts by User View Thanks

Users browsing this topic

Guest (2)

Similar Topics

Audio / Video Out of Sync in vMix UI on EC2 (General Discussion) by streamstuff 7/18/2020 7:24:22 AM(UTC)