move to gif animation + transparent background

app.py

@@ -9,16 +9,16 @@ import tempfile
 def extract_waveform_animation(audio_file, window_seconds=5):
     y, sr = librosa.load(audio_file, sr=None)
     duration = librosa.get_duration(y=y, sr=sr)
-    FPS = 2
+    FPS = 1
     fig, ax = plt.subplots()
     line, = ax.plot([], [], lw=2)
-    window_length = int(window_seconds * sr / FPS)
+    window_length = int(window_seconds * sr)
     
     # Initialize with first window
     first_window = y[:window_length]
     x_vals = np.linspace(0, duration, num=len(y))
     ax.set_axis_off()
-    fig.set_facecolor("black")
+    fig.set_facecolor("#00FFFF00")
     
     def init():
         ax.set_xlim(0, window_seconds)
@@ -27,7 +27,7 @@ def extract_waveform_animation(audio_file, window_seconds=5):
 
     def update(frame):
         # Get current window
-        start = frame * sr // FPS
+        start = frame * sr
         end = start + window_length
         window = y[start:end]
         
@@ -40,9 +40,9 @@ def extract_waveform_animation(audio_file, window_seconds=5):
 
     total_frames = int(duration) * FPS
     ani = FuncAnimation(fig, update, frames=range(total_frames), 
-                       init_func=init, interval=window_seconds // FPS, blit=False)
+                       init_func=init, interval=window_seconds, blit=False)
     
-    with tempfile.NamedTemporaryFile(delete=False, suffix='.mp4') as tmpfile:
+    with tempfile.NamedTemporaryFile(delete=False, suffix='.gif') as tmpfile:
         ani.save(tmpfile.name, writer='ffmpeg', fps=FPS)
         video_path = tmpfile.name
     
@@ -55,7 +55,7 @@ iface = gr.Interface(
         gr.Audio(type="filepath"),
         gr.Slider(1, 10, value=5, step=1, label="Window Size (seconds)")
     ],
-    outputs=gr.Video(),
+    outputs=gr.Image(),
     description="Scroll through audio waveform with a moving window."
 )