Position Keyframes to Text Converter

PositionKeyframesToText.jsx

// After Effects Script: Position Keyframes to Text Converter
// This script converts position keyframes from selected layers to text format

(function() {
    // Check if a composition is active
    var comp = app.project.activeItem;
    if (!comp || !(comp instanceof CompItem)) {
        alert("Please select a composition first.");
        return;
    }
    
    // Check if any layers are selected
    var selectedLayers = comp.selectedLayers;
    if (selectedLayers.length === 0) {
        alert("Please select at least one layer.");
        return;
    }
    
    // Store the output text
    var outputText = "";
    
    // Begin undo group - this will allow undoing all operations with one undo
    app.beginUndoGroup("Extract Position Keyframes to Text");
    
    try {
        // Process each selected layer
        for (var i = 0; i < selectedLayers.length; i++) {
            var layer = selectedLayers[i];
            var position = layer.property("Transform").property("Position");
            
            // Check if position property exists
            if (!position) {
                continue;
            }
            
            // Store original expression state
            var originalExpression = position.expression;
            var hadExpression = (originalExpression && originalExpression !== "");
            
            // Add a dummy expression if no expression exists
            if (!hadExpression) {
                position.expression = "value";
            }
            
            // Convert expression to keyframes
            position.selected = true;
            app.executeCommand(app.findMenuCommandId("Convert Expression to Keyframes"));
            
            // Now extract the keyframe data
            var keyframeData = extractKeyframeData(layer, comp);
            outputText += keyframeData;
        }
        
    } finally {
        // End undo group
        app.endUndoGroup();
    }
    
    // Create a window to display the results
    showResultsWindow(outputText);
    
    function extractKeyframeData(layer, comp) {
        var position = layer.property("Transform").property("Position");
        var data = "";
        
        // Header information
        data += "Adobe After Effects 8.0 Keyframe Data\n\n";
        data += "\tUnits Per Second\t" + Math.round(comp.frameRate) + "\n";
        
        // Get source dimensions (using layer dimensions as approximation)
        var sourceWidth = layer.width || 100;
        var sourceHeight = layer.height || 100;
        
        data += "\tSource Width\t" + Math.round(sourceWidth) + "\n";
        data += "\tSource Height\t" + Math.round(sourceHeight) + "\n";
        data += "\tSource Pixel Aspect Ratio\t1\n";
        data += "\tComp Pixel Aspect Ratio\t1\n\n";
        
        data += "Transform\tPosition\n";
        data += "\tFrame\tX pixels\tY pixels\tZ pixels\t\n";
        
        // Get keyframe times and values
        var numKeys = position.numKeys;
        var fps = comp.frameRate;
        var startTime = comp.workAreaStart;
        var endTime = startTime + comp.workAreaDuration;
        
        if (numKeys > 0) {
            // If there are keyframes, use them
            var firstKeyTime = position.keyTime(1);
            var lastKeyTime = position.keyTime(numKeys);
            
            // Sample from first key to last key
            var currentTime = firstKeyTime;
            var frameNum = 0;
            
            while (currentTime <= lastKeyTime) {
                var value = position.valueAtTime(currentTime, false);
                var x = value[0];
                var y = value[1];
                var z = (value.length > 2) ? value[2] : 0;
                
                data += "\t" + frameNum + "\t" + x + "\t" + y + "\t" + z + "\t\n";
                
                frameNum++;
                currentTime = firstKeyTime + (frameNum / fps);
            }
        } else {
            // If no keyframes, sample the entire work area
            var totalFrames = Math.floor(comp.workAreaDuration * fps);
            
            for (var frame = 0; frame <= totalFrames; frame++) {
                var time = startTime + (frame / fps);
                var value = position.valueAtTime(time, false);
                var x = value[0];
                var y = value[1];
                var z = (value.length > 2) ? value[2] : 0;
                
                data += "\t" + frame + "\t" + x + "\t" + y + "\t" + z + "\t\n";
            }
        }
        
        data += "\n\nEnd of Keyframe Data\n";
        
        return data;
    }
    
    function showResultsWindow(text) {
        // Create UI window
        var dialog = new Window("dialog", "Position Keyframe Data");
        dialog.orientation = "column";
        dialog.alignChildren = "fill";
        dialog.preferredSize.width = 600;
        dialog.preferredSize.height = 500;
        
        // Add instruction text
        var instructions = dialog.add("statictext", undefined, "Copy the text below (Ctrl/Cmd+A to select all, Ctrl/Cmd+C to copy):");
        
        // Create a panel to hold the text (prevents edittext issues)
        var textPanel = dialog.add("panel");
        textPanel.alignChildren = "fill";
        
        // Add text area with the keyframe data
        var textArea = textPanel.add("edittext", undefined, text, {
            multiline: true,
            scrolling: true,
            readonly: false
        });
        textArea.preferredSize.height = 400;
        
        // Add buttons
        var buttonGroup = dialog.add("group");
        buttonGroup.alignment = "center";
        
        var copyInstructionBtn = buttonGroup.add("button", undefined, "Copy Instructions");
        var closeBtn = buttonGroup.add("button", undefined, "Close");
        
        // Button functionality
        copyInstructionBtn.onClick = function() {
            // Show copy instructions
            alert("To copy all text:\n\n" +
                  "1. Click inside the text area\n" +
                  "2. Press Ctrl/Cmd + A to select all\n" +
                  "3. Press Ctrl/Cmd + C to copy\n\n" +
                  "After closing this window, you can press Ctrl/Cmd + Z to undo\n" +
                  "the keyframe baking and restore your original expressions.");
        };
        
        closeBtn.onClick = function() {
            dialog.close();
        };
        
        // Auto-select all text when window opens
        textArea.active = true;
        
        // Show the dialog
        dialog.show();
        
        // Try to select all text after showing
        textArea.textselection = [0, text.length];
    }
})();