Return-Path: Received: from host6.canaca.com ([66.49.160.142] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP-TLS id 4635898 for AE-List@media-motion.tv; Fri, 24 Feb 2012 04:13:12 +0100 Received: from [74.198.150.147] (helo=[25.65.123.19]) by host6.canaca.com with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.69) (envelope-from ) id 1S0lh7-0000xP-Dr for AE-List@media-motion.tv; Thu, 23 Feb 2012 22:19:42 -0500 Subject: Re: [AE] Motion tracking woes References: From: Jack Tunnicliffe Content-Type: multipart/alternative; boundary=Apple-Mail-FFFF3CDE-15CB-489D-8060-DB6DD018326A X-Mailer: iPhone Mail (9A405) In-Reply-To: Message-Id: <145DEAB6-4A68-45B4-AE51-715F48116F0E@javapost.ca> Date: Thu, 23 Feb 2012 21:19:34 -0600 To: After Effects Mail List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - host6.canaca.com X-AntiAbuse: Original Domain - media-motion.tv X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - javapost.ca X-Source: X-Source-Args: X-Source-Dir: --Apple-Mail-FFFF3CDE-15CB-489D-8060-DB6DD018326A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 You might need to widen your tracking search region, the outside box, for fa= st moves. This is a common mistake where people thing a small region will wo= rk. Also Mocha Pro's remove tool shines at doing this compensating for lighting c= hanges as the head turns, etc. Jack Tunnicliffe www.javapost.ca www.caffeineproductions.ca Sent from my Apple iPhone On 2012-02-23, at 10:00 AM, John Morgan wrote: > Admittedly I=E2=80=99ve not done a lot of motion tracking. > =20 > I=E2=80=99ve got a shot=E2=80=94head and shoulders interview on green scre= en (720p 23.98)=E2=80=94where I failed to notice the little white speck at t= he edge of a nostril. > =20 > Steps done so far: > 1- Exported the first frame of this clip to Photoshop>rubber-stamped/= fixed the white speck area, then made a small selection of the immediate are= a (with 2 pixel blur)>created and saved to new layer>deleted background laye= r and saved as .PNG file. So my =E2=80=9Crepair=E2=80=9D area is a small pa= tch, also 1280x720, surrounded by lots of transparent area. > =20 > 2- Imported the bad clip.mxf (P2 video file) and the patch.png file t= o Ae. Turned on tracking so I=E2=80=99m tracking Position and Rotation. Set t= he two tracking points to 1) exactly on the white spec and 2) a point on an e= ar> defined the target to be the patch.png file and ran the Analyze function= to set the related keyframes. > =20 > During his interview, as you might assume, there=E2=80=99s quite of bit of= head shaking. The nose goes all over the place. There=E2=80=99s motion blur= ring that occurs on the clip because of the motion, and that seems to shake t= he white spec tracker loose. It drifts around slightly. > =20 > But here=E2=80=99s the deal. After applying all the motion and rotation ke= ys to the patch.png file, the patch locates itself (according to the keyfram= es) several inches away on his cheek. My nostril repair patch now appears to= be a mole that pretty closely tracks to his cheek rather than tracking to t= he nostril area where it was located at frame 1 when the tracking began. > =20 > My question is: what is the trick to take a set of motion/rotation keys a= ttached to the patch.png file, and slide=E2=80=A6 > =20 > =E2=80=A6uhhh=E2=80=A6I got it! Change the Anchor Point! Doh! > =20 > OK. So now that=E2=80=99s solved, have I hit Ae=E2=80=99s wall, in that it= s motion tracker is only so good in high motion areas? Any other options to= pin that tracker down tighter? > =20 > Thanks, > =20 > John > =20 > =20 > =20 >=20 > This message, and any attachments, is intended only for the use of the add= ressee and may contain information that is privileged and confidential or ot= herwise exempt from disclosure under applicable law. If the reader of this e= -mail is not the intended recipient, you are hereby notified that any unauth= orized use, dissemination, distribution or reproduction of this message is p= rohibited. If you have received this communication in error, please notify t= he sender by return e-mail and delete this e-mail and any attachments from y= our system. =C2=AD=C2=AD =20 --Apple-Mail-FFFF3CDE-15CB-489D-8060-DB6DD018326A Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
You might need to widen yo= ur tracking search region, the outside box, for fast moves. This is a common= mistake where people thing a small region will work.

Also Mocha Pro's remove tool shines at doing this compensating for lighti= ng changes as the head turns, etc.

Jack Tunnicliffe
www.javapost.ca
Sent from my Apple iPhone
On 2012-02-23, at 10:00 AM, John Morgan <John.Morgan@slcc.edu> wrote:

<= blockquote type=3D"cite">

Admittedly I=E2=80=99ve not done a lot of motion tracking.

 

I=E2= =80=99ve got a shot=E2=80=94head and shoulders interview on green screen (72= 0p 23.98)=E2=80=94where I failed to notice the little white speck at the edg= e of a nostril.

 

Steps done so far:

1-      Exported the first frame of this clip to Photoshop>rubber-stamped/f= ixed the white speck area, then made a small selection of the immediate area= (with 2 pixel blur)>created and saved to new layer>deleted background= layer and saved as .PNG file.  So my =E2=80=9Crepair=E2=80=9D area is a= small patch, also 1280x720, surrounded by lots of transparent area.

 

2-      Imported the bad clip.mxf (P2 video file) and the patch.png file to Ae. T= urned on tracking so I=E2=80=99m tracking Position and Rotation. Set the two= tracking points to 1) exactly on the white spec and 2) a point on an ear>= ; defined the target to be the patch.png file and ran the Analyze function t= o set the related keyframes.

 

During his interview, as you might a= ssume, there=E2=80=99s quite of bit of head shaking. The nose goes all over t= he place. There=E2=80=99s motion blurring that occurs on the clip because of= the motion, and that seems to shake the white spec tracker loose. It drifts= around slightly.

 

=

But here=E2=80=99s the deal. After applying all the m= otion and rotation keys to the patch.png file, the patch locates itself (acc= ording to the keyframes) several inches away on his cheek. My nostril repair= patch now appears to be a mole that pretty closely tracks to his cheek rath= er than tracking to the nostril area where it was located at frame 1 when th= e tracking began.

 

=

My question is:  what is the trick to take a set= of motion/rotation keys attached to the patch.png file, and slide=E2=80=A6<= o:p>

 

=E2=80=A6uhhh=E2=80=A6I got it! Change the Anchor Point! Doh!

 

OK. S= o now that=E2=80=99s solved, have I hit Ae=E2=80=99s wall, in that its motio= n tracker is only so good in high motion areas?  Any other options to p= in that tracker down tighter?

&nbs= p;

Thanks,

 

John

 

 

 


This message, and any= attachments, is intended only for the use of the addressee and may contain i= nformation that is privileged and confidential or otherwise exempt from disc= losure under applicable law. If the reader of this e-mail is not the intend= ed recipient, you are hereby notified that any unauthorized use, disseminati= on, distribution or reproduction of this message is prohibited. If you have= received this communication in error, please notify the sender by return e-= mail and delete this e-mail and any attachments from your system.  = ;=C2=AD=C2=AD  
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