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# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import argparse
import subprocess
import math
import re
def natural_sort_key(s):
"""Sort strings containing numbers in human order."""
return [int(text) if text.isdigit() else text.lower() for text in re.split(r'(\d+)', s)]
def get_video_size(video_path):
"""Return (width, height) of video."""
width = int(subprocess.check_output([
"ffprobe", "-v", "error",
"-select_streams", "v:0",
"-show_entries", "stream=width",
"-of", "default=nw=1:nk=1",
video_path
], text=True).strip())
height = int(subprocess.check_output([
"ffprobe", "-v", "error",
"-select_streams", "v:0",
"-show_entries", "stream=height",
"-of", "default=nw=1:nk=1",
video_path
], text=True).strip())
return width, height
def make_grids(input_files, grid_w, grid_h, output_dir):
os.makedirs(output_dir, exist_ok=True)
videos_per_grid = grid_w * grid_h
# Trim list so only complete grids are processed
total_complete_videos = (len(input_files) // videos_per_grid) * videos_per_grid
input_files = input_files[:total_complete_videos]
total_grids = len(input_files) // videos_per_grid
# Assume all videos have same resolution
vid_w, vid_h = get_video_size(input_files[0])
for grid_idx in range(total_grids):
start_idx = grid_idx * videos_per_grid
end_idx = start_idx + videos_per_grid
chunk = input_files[start_idx:end_idx]
inputs = []
for vid in chunk:
inputs.extend(["-i", vid])
# Layout row by row
layout_parts = []
for row in range(grid_h):
for col in range(grid_w):
x = col * vid_w
y = row * vid_h
layout_parts.append(f"{x}_{y}")
layout_str = "|".join(layout_parts)
filter_cmd = f"xstack=inputs={videos_per_grid}:layout={layout_str}[outv]"
output_path = os.path.join(output_dir, f"{grid_idx}.mp4")
cmd = [
"ffmpeg", "-y",
*inputs,
"-filter_complex", filter_cmd,
"-map", "[outv]",
"-c:v", "libx264",
"-crf", "20", # Good quality and VSCode compatible
"-preset", "fast",
"-pix_fmt", "yuv420p",
output_path
]
print(f"Creating grid {grid_idx} ({start_idx}..{end_idx-1}) → {output_path}")
subprocess.run(cmd, check=True)
def parse_args():
parser = argparse.ArgumentParser(description="Create video grids without resizing and viewable in VSCode.")
parser.add_argument("input_dir", help="Directory with videos to combine.")
parser.add_argument("--grid_width", type=int, required=True, help="Number of videos per row.")
parser.add_argument("--grid_height", type=int, required=True, help="Number of videos per column.")
parser.add_argument("-o", "--output_dir", required=True, help="Directory to save grid videos.")
return parser.parse_args()
def main():
args = parse_args()
files = [f for f in os.listdir(args.input_dir) if f.lower().endswith(".mp4")]
files.sort(key=natural_sort_key) # Natural numeric order
files = [os.path.join(args.input_dir, f) for f in files]
if not files:
print("No .mp4 files found in input_dir")
return
make_grids(files, args.grid_width, args.grid_height, args.output_dir)
if __name__ == "__main__":
main() |