diff --git a/meshroom/__init__.py b/meshroom/__init__.py
index 5fea22b4..f76d3d3f 100644
--- a/meshroom/__init__.py
+++ b/meshroom/__init__.py
@@ -150,3 +150,4 @@ def setupEnvironment(backend=Backend.STANDALONE):
 
 
 os.environ["QML_XHR_ALLOW_FILE_READ"] = '1'
+os.environ["PYSEQ_STRICT_PAD"] = '1'
diff --git a/meshroom/ui/components/filepath.py b/meshroom/ui/components/filepath.py
index 524afddb..7e44ed77 100644
--- a/meshroom/ui/components/filepath.py
+++ b/meshroom/ui/components/filepath.py
@@ -5,7 +5,7 @@ from PySide2.QtCore import QObject, Slot
 
 import os
 import glob
-import re
+import pyseq
 
 
 class FilepathHelper(QObject):
@@ -146,25 +146,24 @@ class FilepathHelper(QObject):
         if extension is None:
             extension = ".*"
         return [self.basename(f) for f in glob.glob(os.path.join(folderPath, f"*{extension}")) if os.path.isfile(f)]
-    
+
     @Slot(str, result="QVariantList")
     def resolveSequence(self, path):
         """
         Get id of each file in the sequence.
         """
-        replacements = self.getFilenamesFromFolder(self.dirname(path), self.extension(path))
+        # use of pyseq to get the sequences
+        seq = pyseq.get_sequences(self.asStr(path))
 
-        ids = []
-        for i in replacements:
-            # convert basename to regex
-            splitBefore = self.basename(path).split("(")
-            splitAfter = splitBefore[1].split(")")
-            id = re.search("["+splitBefore[0]+"]("+splitAfter[0]+")["+splitAfter[1]+"]", i)
-            if id:
-                # put id in replacements as key of replacements[i]
-                ids.append(id[1])
+        ids = [[s.start(), s.end()] for s in seq]
 
-        ids.sort()
+        folder = self.dirname(path)
 
-        resolved = [path.replace(self.basename(path), replacement) for replacement in replacements]
+        missingFiles = [s.missing() for s in seq]
+        
+        # create the resolved path for each sequence and if a frame is missing add a empty string
+        resolved = [[os.path.join(folder, s.head() + str(s.format("%p") % frame) + s.tail()) if frame not in missingFiles[seq.index(s)]
+                     else "" for frame in range(ids[seq.index(s)][0], ids[seq.index(s)][1] + 1)] if s.frames()
+                     else os.path.join(folder, s.head())
+                    for s in seq]
         return ids, resolved
diff --git a/meshroom/ui/qml/Viewer/SequencePlayer.qml b/meshroom/ui/qml/Viewer/SequencePlayer.qml
index 234f90b6..0fd5df88 100644
--- a/meshroom/ui/qml/Viewer/SequencePlayer.qml
+++ b/meshroom/ui/qml/Viewer/SequencePlayer.qml
@@ -39,7 +39,7 @@ FloatingPane {
     function updateReconstructionView() {
         if (isOutputSequence)
             return
-        if (_reconstruction && m.frame >= 0 && m.frame < sortedViewIds.length) {
+        if (_reconstruction && m.frame >= frameRange.min && m.frame < frameRange.max+1) {
             if (!m.playing && !frameSlider.pressed) {
                 _reconstruction.selectedViewId = sortedViewIds[m.frame];
             } else {
diff --git a/meshroom/ui/qml/Viewer/Viewer2D.qml b/meshroom/ui/qml/Viewer/Viewer2D.qml
index 88309159..71218d86 100644
--- a/meshroom/ui/qml/Viewer/Viewer2D.qml
+++ b/meshroom/ui/qml/Viewer/Viewer2D.qml
@@ -268,20 +268,26 @@ FocusScope {
             let ids = sequence[0]
             let resolved = sequence[1]
 
-            //order by path
-            resolved.sort()
             // reset current frame to 0 if it is imageList but not sequence
             if (attr.desc.semantic === "imageList") {
+                // concat in one array all sequences in resolved
+                resolved = [].concat.apply([], resolved)
                 frameRange.min = 0
                 frameRange.max = resolved.length-1
                 currentFrame = 0
             }
 
             if (attr.desc.semantic === "sequence") {
+                // if there is several sequences, take the first one
+                resolved = resolved[0]
+                ids = ids[0]
                 frameRange.min = ids[0]
                 frameRange.max = ids[ids.length-1]
                 currentFrame = frameRange.min
             }
+            //order by path
+            resolved.sort()
+
             return resolved
         } else {
             for (let i = 0; i < _reconstruction.viewpoints.count; i++) {