diff --git a/sample/samples.txt b/sample/samples.txt
index fdc780a..86434bc 100644
--- a/sample/samples.txt
+++ b/sample/samples.txt
@@ -1,13 +1,14 @@
 Some samples of the files produced by this program:
 
-File name shows the date and time of the video starts, then frame size(uxga,svga,vga,cif), 
-jpeg quality (0..63), length (seconds), and playback speed (x realtime).
+File name shows the date and time of the video starts, then frame size (uxga,svga,vga,cif), 
+jpeg quality (0..63), length (seconds), and playback speed (x realtime).  
+Interval between frames, not included in filename.
 
-2019-08-02__13-15-16_uxga_Q10_L30_S1.avi     2  frames per second
-2019-08-02__13-16-28_svga_Q10_L30_S1.avi     5  frames per seconds
-2019-08-02__13-17-03_vga_Q10_L30_S1.avi     10 frames per second 
-2019-08-02__13-17-42_cif_Q10_L30_S1.avi     20 frames per second
+2019-08-02__13-15-16_uxga_Q10_L30_S1.avi    500 ms  - 2  frames per second
+2019-08-02__13-16-28_svga_Q10_L30_S1.avi    200 ms  - 5  frames per second
+2019-08-02__13-17-03_vga_Q10_L30_S1.avi     100 ms  - 10 frames per second
+2019-08-02__13-17-42_cif_Q10_L30_S1.avi      50 ms  - 20 frames per second
 
-2019-08-02__13-21-15_uxga_Q5_L120_S20.avi    1  second per frame, playback 20 times faster
-2019-08-02__15-29-10_uxga_Q5_L1800_S40.avi   1  second per frame, playback 20 times faster
-2019-08-02__18-53-29_uxga_Q40_L1800_S40.avi  5  seconds per frame, playback 40 times faster 
+2019-08-02__13-21-15_uxga_Q5_L120_S20.avi    1000 ms - 1  second per frame, playback 20 times faster
+2019-08-02__15-29-10_uxga_Q5_L1800_S40.avi   5000 ms - 1  second per frame, playback 40 times faster (partial) 
+2019-08-02__18-53-29_uxga_Q40_L1800_S40.avi  5000 ms - 5  seconds per frame, playback 40 times faster