Create app.py

app.py

@@ -0,0 +1,121 @@
+import gradio as gr
+import subprocess
+import os
+import uuid
+import shutil
+
+TEMP_DIR = "temp_work"
+os.makedirs(TEMP_DIR, exist_ok=True)
+
+
+def run_cmd(cmd):
+    """Run a shell command and raise readable error if it fails."""
+    result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
+    if result.returncode != 0:
+        raise RuntimeError(f"FFmpeg error:\n{result.stderr[-1500:]}")
+    return result
+
+
+def merge_videos(video1, video2, pitch_factor, apply_deep_voice, target_height, progress=gr.Progress()):
+    if video1 is None or video2 is None:
+        raise gr.Error("Dono videos upload karo bhai!")
+
+    session_id = str(uuid.uuid4())[:8]
+    work_dir = os.path.join(TEMP_DIR, session_id)
+    os.makedirs(work_dir, exist_ok=True)
+
+    v1_norm = os.path.join(work_dir, "v1_norm.mp4")
+    v2_norm = os.path.join(work_dir, "v2_norm.mp4")
+    concat_list = os.path.join(work_dir, "list.txt")
+    joined = os.path.join(work_dir, "joined.mp4")
+    final_output = os.path.join(work_dir, "final_output.mp4")
+
+    try:
+        progress(0.1, desc="Video 1 normalize ho raha hai...")
+        # Normalize video1 - same resolution, fps, codec settings for safe concat
+        run_cmd(
+            f'ffmpeg -y -i "{video1}" '
+            f'-vf "scale=-2:{target_height},fps=30" '
+            f'-c:v libx264 -preset veryfast -crf 23 '
+            f'-c:a aac -ar 44100 -ac 2 -b:a 128k '
+            f'"{v1_norm}"'
+        )
+
+        progress(0.3, desc="Video 2 normalize ho raha hai...")
+        run_cmd(
+            f'ffmpeg -y -i "{video2}" '
+            f'-vf "scale=-2:{target_height},fps=30" '
+            f'-c:v libx264 -preset veryfast -crf 23 '
+            f'-c:a aac -ar 44100 -ac 2 -b:a 128k '
+            f'"{v2_norm}"'
+        )
+
+        progress(0.55, desc="Dono videos join ho rahe hain...")
+        with open(concat_list, "w") as f:
+            f.write(f"file '{os.path.abspath(v1_norm)}'\n")
+            f.write(f"file '{os.path.abspath(v2_norm)}'\n")
+
+        run_cmd(
+            f'ffmpeg -y -f concat -safe 0 -i "{concat_list}" '
+            f'-c copy "{joined}"'
+        )
+
+        progress(0.8, desc="Voice effect apply ho raha hai...")
+        if apply_deep_voice:
+            # asetrate changes pitch+speed, aresample fixes sample rate,
+            # atempo compensates speed back to normal -> pitch changes, speed stays same
+            new_rate = int(44100 * pitch_factor)
+            run_cmd(
+                f'ffmpeg -y -i "{joined}" '
+                f'-af "asetrate={new_rate},aresample=44100,atempo={1/pitch_factor:.4f}" '
+                f'-c:v copy -c:a aac -b:a 128k '
+                f'"{final_output}"'
+            )
+        else:
+            shutil.copy(joined, final_output)
+
+        progress(1.0, desc="Done!")
+        return final_output
+
+    except Exception as e:
+        raise gr.Error(str(e))
+
+
+def cleanup_old_sessions():
+    # Optional: clear temp dir on each fresh load to save disk space on free tier
+    if os.path.exists(TEMP_DIR):
+        for d in os.listdir(TEMP_DIR):
+            shutil.rmtree(os.path.join(TEMP_DIR, d), ignore_errors=True)
+
+
+with gr.Blocks(title="Video Merger + Deep Voice") as demo:
+    gr.Markdown("# 🎬 2 Video Merge + Deep Voice Tool")
+    gr.Markdown("Pehla video upload karo (aage chalega), dusra video upload karo (piche chalega). Chaaho to deep voice effect bhi laga sakte ho.")
+
+    with gr.Row():
+        video1_input = gr.Video(label="Video 1 (Aage / Pehle chalega)")
+        video2_input = gr.Video(label="Video 2 (Piche / Baad me chalega)")
+
+    with gr.Row():
+        apply_deep_voice = gr.Checkbox(label="Deep Voice Effect Lagao", value=True)
+        pitch_slider = gr.Slider(
+            minimum=0.6, maximum=0.95, value=0.85, step=0.01,
+            label="Pitch Level (kam value = zyada deep voice)"
+        )
+        height_dropdown = gr.Dropdown(
+            choices=["480", "720", "1080"], value="720",
+            label="Output Resolution (kam = fast processing)"
+        )
+
+    merge_btn = gr.Button("🔥 Merge Karo", variant="primary")
+    output_video = gr.Video(label="Final Output")
+
+    merge_btn.click(
+        fn=merge_videos,
+        inputs=[video1_input, video2_input, pitch_slider, apply_deep_voice, height_dropdown],
+        outputs=output_video
+    )
+
+if __name__ == "__main__":
+    cleanup_old_sessions()
+    demo.launch()