From: Todd Kopriva <kopriva@adobe.com>
To: After Effects Mail List <AE-List@media-motion.tv>
Date: Fri, 9 Nov 2012 12:38:36 -0800
Subject: RE: [AE] AE / FCP Audio Sync Discrepancy
Thread-Topic: [AE] AE / FCP Audio Sync Discrepancy
Thread-Index: Ac2+uZRDQEimX50ITNmZOHigVi6RxgAAD2WA
Message-ID: <B006868B2420FA4F88AB29E127AA783D3982BD21AC@nambx09.corp.adobe.com>
References: <list-4895354@media-motion.tv>
In-Reply-To: <list-4895354@media-motion.tv>
Accept-Language: en-US
Content-Language: en-US
acceptlanguage: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0

The deviation seems to be by a factor of 1/1,000, which is exactly the same=
 as the fractional difference between 23.976 and 24.00. So, it seems that y=
our footage is being treated as 23.976fps in one application and 24.000fps =
in the other.


> -----Original Message-----
> From: After Effects Mail List [mailto:AE-List@media-motion.tv] On
> Behalf Of Jonathan Penzner
> Sent: 09November2012 12:34
> To: After Effects Mail List
> Subject: [AE] AE / FCP Audio Sync Discrepancy
>=20
> Greetings to all.
>=20
> I'm assisting on a film and the audio round trip to Pro Tools isn't
> syncing. I'm hoping someone has some insight into the problem. Which
> is:
>=20
> The film is 24 fps. Audio 48k 16 bit out. 48k 24 bit back.
> To isolate the problem, we created 3, 5 and 7 minute clips. Each clip
> begins with a standard Cinema Tools countdown with a one frame beep at
> the 2. Following the countdown is black with a time code. After the
> allotted time of the clip, there's another 1 frame 2 with a one frame
> beep.
> We sent this off to the sound designer who, in Pro Tools, matched the
> beeps in his set up, then sent the audio file back.
>=20
> When I line up the files we sent with the files he sent in After
> Effects, they match perfectly.
>=20
> In FCP, however, they're out of sync -
> In the 3 minute clip, the sound guy's beep sounds 5 frames before the
> beep at the end
> In the 5 minute clip,  the sound guy's  beep sounds 8 frames before the
> beep at the end.
> In the 7 minute clip,  the sound guy's  beep sounds 11 frames before
> the beep at the end.
> Not only that, but the waveform appears visually in the right place in
> the timeline of the 5 and 7 minute clips, while the actual audio sounds
> 8 and 11 frames earlier, as noted above.
>=20
> Does anyone have a clue what can be done to fix this problem? We can't
> sync the film until we resolve this issue.
>=20
> Many thanks in advance.
>=20
> On our end:
> FCP 7.0.3
> QT 7.6.6 Pro
> AE 11.0.0.378
> iMac 10.7.4
>=20
>=20
> Jonathan
>=20
>=20
>=20
>=20
> JONATHAN PENZNER
> SUNDANCE/REALTIME
> VIDEO EDITING * MOTION GRAPHICS * DESIGN
>=20
>=20
> | STUDIO 626 345-0285 |
> | CELL 818 321-2890 |
>=20
>=20
> SUREAL@CHARTER.NET