Video Playback - Revision history

E.vandenberge: /* Video encoding */

2026-04-15T09:12:05Z

Video encoding

2026-01-14T14:17:01Z

Python

2026-01-14T14:12:32Z

Video playback

2025-09-15T12:49:11Z

FFmpeg

2025-04-29T10:47:46Z

Python

2025-04-29T09:49:23Z

Video encoding

2025-04-29T09:47:14Z

Python

2025-04-29T09:46:06Z

Python

2025-04-29T09:37:50Z

Video playback

2025-04-29T09:33:48Z

Python

@@ Line 287: / Line 287: @@
 Stabilize the camera and avoid automatic exposure, white balance, or focus during recording to prevent inconsistencies.
 Record in a controlled environment with consistent lighting and minimal background distractions.
-The TSG recomends to use the [https://www.elgato.com/ww/en/p/facecam-mk2 facecam] for high quality video recording.
+The TSG recomends to use the [[Elgato Facecam]] for high quality video recording.
 ===Video Settings===

@@ Line 6: / Line 6: @@
 Note that the Lab Computer displays are typically set to 1920×1080 at 120Hz. We found that this is sufficient for most applications. There are possibilities to go higher. Later in this wiki we will explain how to build audio and video. We will start with playing video, both with and without audio.
-=== Python ===
+=== Python psychopy 2024.2.4===
 Example demonstrating how to play a video with audio:
 <syntaxhighlight lang="python" line>

@@ Line 21: / Line 21: @@
 win = visual.Window(size=(1024, 768), fullscr=False, color=(0, 0, 0))
-video = visual.VlcMovieStim(
+movie = visual.MovieStim(
      win, filename=video_file,
      autoStart= False
@@ Line 35: / Line 35: @@
 # Main loop for video playback
-while video.status != visual.FINISHED:
+while not movie.isFinished:
      # Draw the current video frame
-     video.draw()
+     movie.draw()
      win.flip()
@@ Line 43: / Line 43: @@
      if 'q' in keys:
          break
 win.close()
@@ Line 63: / Line 66: @@
 win = visual.Window(size=(1280, 720), fullscr=False, color=(0, 0, 0), units="pix")
-video = visual.VlcMovieStim(
+movie = visual.MovieStim(
      win, filename=video_file,
      size=None,  # Use the native video size
@@ Line 85: / Line 88: @@
 audio.play()
 time.sleep(0.04)
-video.play()
+movie.play()
-video_start_time = core.getTime()
+movie_start_time = core.getTime()
-while video.status != visual.FINISHED:
+while not movie.isFinished:
      # Draw the current video frame
-     video.draw()
+     movie.draw()
      win.flip()
@@ Line 97: / Line 100: @@
          audio.stop()
          break
 # Close the PsychoPy window

@@ Line 485: / Line 485: @@
 ==FFmpeg==
 ===Synchronization===
 Ensure the audio and video streams have consistent timestamps:

@@ Line 244: / Line 244: @@
 subprocess.run(['ffmpeg', '-i', input_file, '-an', output_video])
-subprocess.run(['ffmpeg', '-i', input_file, '-vn', '-acodec', 'pcm_s16le', '-ar', '44100', output_audio])
+subprocess.run(['ffmpeg', '-i', input_file, '-vn', '-acodec', 'pcm_s16le', '-ar', '48000', output_audio])
 print(f"Video saved to: {output_video}")

@@ Line 108: / Line 108: @@
 import json
-file_path = "C_dyad1_video2_241123.mp4"
+file_path = "tick_rhythm_combined_1min.mp4"
 def check_video_file(file_path):

@@ Line 428: / Line 428: @@
 === Python ===
-Example demonstrating how to check and play your audio:
+Example demonstrating how to check your os settings, audio file and play your audio:
 <syntaxhighlight lang="python" line>
 #!/usr/bin/env python3.10

@@ Line 8: / Line 8: @@
 === Python ===
 Example demonstrating how to play a video with audio:
 <syntaxhighlight lang="python" line>
 from psychopy import logging, prefs
@@ Line 49: / Line 47: @@
 core.quit()
 </syntaxhighlight>
-</div>
 Example demonstrating how to play a video with audio disconnected:
 <syntaxhighlight lang="python" line>