Update app.py

app.py

@@ -5,7 +5,7 @@ import os
 
 st.set_page_config(page_title="Video Speed & Compression Tool", layout="centered")
 
-st.title("🎬 Video Speed & Compression Tool (Fast FFmpeg)")
+st.title("🎬 Video Speed & Compression Tool (Ultra Fast Lossless Mode)")
 
 uploaded_file = st.file_uploader("Upload a video file", type=["mp4", "mov", "avi", "mkv"])
 
@@ -22,19 +22,15 @@ if uploaded_file is not None:
 
     if st.button("Process Video"):
         with st.spinner("Processing... Please wait"):
-            # Save uploaded video to temp file
             with tempfile.NamedTemporaryFile(delete=False, suffix=".mp4") as tmp_input:
                 tmp_input.write(uploaded_file.read())
                 input_path = tmp_input.name
 
-            # Output path
             output_path = tempfile.NamedTemporaryFile(delete=False, suffix=".mp4").name
 
-            # Calculate ffmpeg speed filters
-            video_speed = 1 / speed   # setpts works with inverse of speed
-            audio_speed = speed       # atempo works with speed directly
+            video_speed = 1 / speed
+            audio_speed = speed
 
-            # Build ffmpeg command
             if compress:
                 # Re-encode with compression
                 cmd = [
@@ -45,12 +41,12 @@ if uploaded_file is not None:
                     "-y", output_path
                 ]
             else:
-                # Change speed but keep original quality
+                # Lossless mode (copy original codec without full re-encode)
                 cmd = [
                     "ffmpeg", "-i", input_path,
                     "-filter_complex", f"[0:v]setpts={video_speed}*PTS[v];[0:a]atempo={audio_speed}[a]",
                     "-map", "[v]", "-map", "[a]",
-                    "-c:v", "libx264", "-crf", "18", "-preset", "fast",  # near-lossless
+                    "-c:v", "copy", "-c:a", "aac", "-b:a", "192k",  # copy video, re-encode only audio for sync
                     "-y", output_path
                 ]
 
@@ -58,10 +54,8 @@ if uploaded_file is not None:
 
             st.success("✅ Processing complete!")
 
-            # Show processed video
             st.video(output_path)
 
-            # Download button
             with open(output_path, "rb") as f:
                 st.download_button(
                     label="Download Processed Video",
@@ -70,6 +64,5 @@ if uploaded_file is not None:
                     mime="video/mp4"
                 )
 
-            # Cleanup
             os.remove(input_path)
             os.remove(output_path)