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Help needed - audio/ video sync problem with 5DMkII

Hi everyone,

I recently shot a video using 5d MkII at 25fps 1/50. The audio was recorded internally through a jacked-in lavalier.

Looking at the mov file now I just noticed that audio is out of sync with video, audio anticipates video by maybe a fraction of a second.

Does anybody have any idea on how to fix this?

(please take it kindly on me it the answer is “you have to reshoot everything”)

Any help would be much appreciated…

Many thanks!


by Tommaso Barsali at 2012-08-23 17:39:25 UTC | Bookmark | | Report spam→

Load the clip into your video editing software of choice.
Seperate the audio from the video file and manually re-sync.

Seems strange that they would be out of sync, I shoot a lot of video on the mk II and I have never seen this problem.

by Adrian Storey - Uchujin | 24 Aug 2012 00:08 | Tokyo, Japan | | Report spam→
Ciao Tommaso,

il problema a volte potrebbe essere la compressione in uscita, quando esporti il video, oppure quando lo carichi su Youtube o Vimeo, può capitare che il motore di compressione dei due siti faccia casino.

Per controllare l’allineamento delle tracce ti consiglio di analizzare il filmato impostando l’unità di misura della timeline, dai frames al tempo, così da poter aggiustare con accuratezza il sync.

La cosa migliore, in ogni caso, è registrare audio e video separati ed allineare i segnali in seguito, anche perché l’audio della 5D MkII non è proprio il top.

buon lavoro

by Daniel V. Kevorkian | 24 Aug 2012 13:08 | Firenze, Italy | | Report spam→
If you’re using Final Cut, you can also use PluralEyes (http://www.singularsoftware.com/pluraleyes.html) to fix sync issues. I always use it to sync my audio to the video because I record the audio separately.

by Casey Atkins | 24 Aug 2012 15:08 | Boston, MA, United States | | Report spam→
Are you sure they’re really out of sync? Could it be a playback problem on either an under-powered computer or using an inappropriate NLE or codec? The sound would play back better than the audio… Did you have Magic Lantern on the 5D Mk II, by the way?

by DPC | 24 Aug 2012 17:08 | Paris, France | | Report spam→
Dear all,

many many thanks for all your responses, I will try suggestions to fix this (lightstalkers rocks by the way).
I forgot to mention in my post that I am at reaaaally beginner level on the whole video/audio recording stuff, so maybe it’s just lack of experience.
DPC, Daniel, your suggestion could be right, I will check if it’s just a playblack problem.
I didn’t know Magic Lantern and Pluraleyes (which probably testifies how little I know about video) they seem very helpful, thanks for the tips.

best to all,


by Tommaso Barsali | 27 Aug 2012 05:08 | Asti, Italy | | Report spam→
Usually this is a performance problem. The out of camera codec is not optimized for editing. If you have apple computer try to convert the files into 720p or use a better codec like ProRes or Intermediate. Converting can be done with MPEG Streamclip, it is free.



by Hinrich Schultze | 28 Aug 2012 23:08 | Hamburg, Germany | | Report spam→

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Tommaso Barsali, Photographer Tommaso Barsali
(SUR is my new project)
Asti , Italy
Adrian Storey - Uchujin, Photographer/Film maker Adrian Storey - Uchujin
Photographer/Film maker
Tokyo , Japan
Daniel V. Kevorkian, Photographer Daniel V. Kevorkian
(telling stories)
Firenze , Italy
Casey Atkins, photographer/filmmaker Casey Atkins
Boston, Ma , United States
DPC, Photographer DPC
Paris , France
Hinrich Schultze, Photographer Hinrich Schultze
Hamburg , Germany


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