diff --git a/examples/symba_energy_momentum/collision_movie.py b/examples/symba_energy_momentum/collision_movie.py
index 1a17034c5..e40048c91 100755
--- a/examples/symba_energy_momentum/collision_movie.py
+++ b/examples/symba_energy_momentum/collision_movie.py
@@ -14,8 +14,8 @@
 ncutoff = 1e20
 radscale = 2000
 
-cases = ['supercat_head', 'supercat_off', 'disruption_head', 'disruption_off']
-#cases = ['supercat_head']
+#cases = ['supercat_head', 'supercat_off', 'disruption_head', 'disruption_off']
+cases = ['disruption_off']
 
 def scale_sim(ds, Rcb):
     dst0 = ds.isel(time=0)
@@ -100,8 +100,8 @@ def __init__(self, ds, param):
         # Then setup FuncAnimation.
         self.ani = animation.FuncAnimation(fig, self.update, interval=1, frames=nframes,
                                           init_func=self.setup_plot, blit=False)
-        self.ani.save(animfile, fps=60, dpi=300, extra_args=['-vcodec', 'mpeg4'])
-        #self.ani.save(animfile, fps=60, dpi=300, extra_args=['-vcodec', 'libx264'])
+        #self.ani.save(animfile, fps=60, dpi=300, extra_args=['-vcodec', 'mpeg4'])
+        self.ani.save(animfile, fps=60, dpi=300, extra_args=['-vcodec', 'libx264'])
         print(f"Finished writing {animfile}")
 
     def plot_pl_circles(self, pl, radmarker):
@@ -264,7 +264,7 @@ def data_stream(self, frame=0):
             origin = d['origin_type'].values
 
             t = self.ds.coords['time'].values[frame]
-            self.mask = np.logical_not(radius > self.Rcb)
+            self.mask = np.logical_not(radius == 0.0)
 
             x = np.nan_to_num(x, copy=False)
             y = np.nan_to_num(y, copy=False)
diff --git a/python/swiftest/swiftest/io.py b/python/swiftest/swiftest/io.py
index cae553b13..da1c49f17 100644
--- a/python/swiftest/swiftest/io.py
+++ b/python/swiftest/swiftest/io.py
@@ -1503,4 +1503,53 @@ def swiftest2swifter_param(swiftest_param, J2=0.0, J4=0.0):
         swifter_param['OUT_STAT'] = "UNKNOWN"
     swifter_param['! VERSION'] = "Swifter parameter file converted from Swiftest"
 
-    return swifter_param
\ No newline at end of file
+    return swifter_param
+
+
+def swifter2swift_param(swifter_param, J2=0.0, J4=0.0):
+    swift_param = {
+        '! VERSION': f"Swift parameter input file converted from Swifter",
+        'T0': 0.0,
+        'TSTOP': 0.0,
+        'DT': 0.0,
+        'DTOUT': 0.0,
+        'DTDUMP': 0.0,
+        'L1': "F",
+        'L1': "F",
+        'L2': "F",
+        'L3': "F",
+        'L4': "F",
+        'L5': "T",
+        'L6': "F",
+        'RMIN': -1,
+        'RMAX': -1,
+        'RMAXU': -1,
+        'QMIN': -1,
+        'LCLOSE': "F",
+        'BINARY_OUTPUTFILE': "bin.dat",
+        'STATUS_FLAG_FOR_OPEN_STATEMENTS': "NEW",
+    }
+    
+    swift_param['T0'] = swifter_param['T0']
+    swift_param['TSTOP'] = swifter_param['TSTOP']
+    swift_param['DT'] = swifter_param['DT']
+    # Convert the parameter file values
+    swift_param['DTOUT'] = swifter_param['ISTEP_OUT'] * swifter_param['DT']
+    swift_param['DTDUMP'] = swifter_param['ISTEP_DUMP'] * swifter_param['DT']
+    swift_param['BINARY_OUTPUTFILE'] = swifter_param['BIN_OUT']
+    swift_param['STATUS_FLAG_FOR_OPEN_STATEMENTS'] = swifter_param['OUT_STAT']
+
+    if swifter_param['CHK_CLOSE'] == "YES":
+        swift_param['LCLOSE'] = "T"
+    else:
+        swift_param['LCLOSE'] = "F"
+
+    swift_param['RMIN'] = swifter_param['CHK_RMIN']
+    swift_param['RMAX'] = swifter_param['CHK_RMAX']
+    swift_param['QMIN'] = swifter_param['CHK_QMIN']
+    
+    if swift_param['RMIN'] > 0 or swift_param['RMAX'] > 0 or swift_param['QMIN'] > 0:
+        swift_param['L2'] = 'T'
+        
+
+    return swift_param
\ No newline at end of file