diff --git a/app/core.cpp b/app/core.cpp
index a8ae02e47..4c01573bd 100644
--- a/app/core.cpp
+++ b/app/core.cpp
@@ -1689,27 +1689,52 @@ void Core::CacheActiveSequence(bool in_out_only)
   }
 }
 
+QString StripWindowsDriveLetter(QString s)
+{
+  // HACK: On Windows, absolute paths are saved with a drive letter (e.g. "C:\video.mp4"). Below,
+  //       we use Qt's relative path system to resolve when an entire project may be in a different
+  //       folder, but the files are all in the same place relatively to the project. Unfortunately,
+  //       Qt chooses not to understand paths from Windows on non-Windows platforms, which causes
+  //       this to break when a project is moving from Windows to non-Windows. To resolve that, if
+  //       we're on a non-Windows platform and we detect a Windows path (i.e. a path with a drive
+  //       letter at the start), we strip it off. We also convert any back-slashes to forward-slashes
+  //       because on Windows they are interchangeable and on non-Windows they are not.
+#ifndef Q_OS_WINDOWS
+  if (s.size() >= 2) {
+    if (s.at(0).isLetter() && s.at(1) == ':') {
+      s = s.mid(2);
+      s.replace('\\', '/');
+    }
+  }
+#endif
+
+  return s;
+}
+
 bool Core::ValidateFootageInLoadedProject(Project* project, const QString& project_saved_url)
 {
   QVector<Footage*> project_footage = project->root()->ListChildrenOfType<Footage>();
   QVector<Footage*> footage_we_couldnt_validate;
 
   foreach (Footage* footage, project_footage) {
-    if (!QFileInfo::exists(footage->filename()) && !project_saved_url.isEmpty()) {
+    QString footage_fn = StripWindowsDriveLetter(footage->filename());
+    QString project_fn = StripWindowsDriveLetter(project_saved_url);
+
+    if (!QFileInfo::exists(footage_fn) && !project_saved_url.isEmpty()) {
       // If the footage doesn't exist, it might have moved with the project
       const QString& project_current_url = project->filename();
 
-      if (project_current_url != project_saved_url) {
+      if (project_current_url != project_fn) {
         // Project has definitely moved, try to resolve relative paths
-        QDir saved_dir(QFileInfo(project_saved_url).dir());
+        QDir saved_dir(QFileInfo(project_fn).dir());
         QDir true_dir(QFileInfo(project_current_url).dir());
 
-        QString relative_filename = saved_dir.relativeFilePath(footage->filename());
+        QString relative_filename = saved_dir.relativeFilePath(footage_fn);
         QString transformed_abs_filename = true_dir.filePath(relative_filename);
 
         if (QFileInfo::exists(transformed_abs_filename)) {
           // Use this file instead
-          qInfo() << "Resolved" << footage->filename() << "relatively to" << transformed_abs_filename;
+          qInfo() << "Resolved" << footage_fn << "relatively to" << transformed_abs_filename;
           footage->set_filename(transformed_abs_filename);
         }
       }