Hi all,
is there an easy way to reverse your tracks so you can solve the shot backwards?
I can reverse the actual image sequence easily enough but would I then have to redo all my 2d tracks from scratch?
Thanks.

Hi.
When you create a track, you can track it forward, backward or bidirectionnally.
For automatic tracking, it's fully symmetric, so doing it backward will lead to the same result.
Bye

Thanks, but thats not what I meant really.
What I mean is say I have in my plate loads of objects moving from the left hand side of the screen to right hand side. I spend ages puting in tracks manualy. The plate gets reversed so now the objects are moving from right to left instead of left to right. I don't want to have to retrack all the manual tracks I have just done so is there a way to reverse my 2d tracks so they still fit the plate?
Also what about if for some reason the plate gets flopped?

For this you should use scripting.  
Scripts can access to all 2D tracks and edit them

oh ok cheers.
Are there any good scipting resources for this kind of stuff you know about?

Hi,
 
You can have a look to "mmToolBox" in the "scripts" folder of MatchMover, there is some useful functions to access and modify tracks.
 
Find below an example of a perl script that gets all selected 2D tracks and modify x coordinate.
 
Hope it helps,
 
Niko
 
-------------------------------------------------------------------------
 
# get sequence/cameras settings
my %sequenceAttribs = %{$mm->getSequenceAttribs( $mm->getSequenceId() )}; # attributes of current sequence
my %cameraAttribs = %{$mm->getCameraAttribs( $sequenceAttribs{camera} )}; # corresponding camera attributes
my $width = $cameraAttribs{w};       # image height
my $height = $cameraAttribs{h};       # image height
 
# get selection
my @selection = @{$mm->getSelection( 2 )};
my $itemCount = scalar @selection;
foreach $track ( 1..$itemCount )  
{
 my @track2Dinfos = @{$mm->getTrack2D( @selection[ $track ] )};  # get track 2D positions
 
 foreach $t2Dinfo ( @track2Dinfos )  
 {  
  my %hash = %{ $t2Dinfo };
  my $t = $hash{t};
  my $x = $hash{x};
  my $y = $hash{y};
   
  print "t: $t\tx: $x\ty:$y\n";
   
  $mm->setTrack2D( @selection[ $track ], $width-$x, $y, $t );
 }
}

cheers Niko