File size: 2,201 Bytes
434b0b0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | # -*- coding: utf-8 -*-
# @Organization : Tongyi Lab, Alibaba
# @Author : Lingteng Qiu
# @Email : 220019047@link.cuhk.edu.cn
# @Time : 2025-08-31 10:02:15
# @Function : FFmpeg video encoding from image sequences
import os
import imageio.v3 as iio
import numpy as np
import torch
VIDEO_TYPE_LIST = {".avi", ".mp4", ".gif", ".AVI", ".MP4", ".GIF"}
def encodeffmpeg(inputs, frame_rate, output, format="png"):
"""output: need video_name"""
assert (
os.path.splitext(output)[-1] in VIDEO_TYPE_LIST
), "output is the format of video, e.g., mp4"
assert os.path.isdir(inputs), "input dir is NOT file format"
inputs = inputs[:-1] if inputs[-1] == "/" else inputs
output = os.path.abspath(output)
cmd = (
f"ffmpeg -r {frame_rate} -pattern_type glob -i '{inputs}/*.{format}' "
+ f'-vcodec libx264 -crf 10 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" '
+ f"-pix_fmt yuv420p {output} > /dev/null 2>&1"
)
print(cmd)
output_dir = os.path.dirname(output)
if os.path.exists(output):
os.remove(output)
os.makedirs(output_dir, exist_ok=True)
print("encoding imgs to video.....")
os.system(cmd)
print("video done!")
def images_to_video(
images, output_path, fps, gradio_codec: bool, verbose=False, bitrate="10M"
):
os.makedirs(os.path.dirname(output_path), exist_ok=True)
frames = []
for i in range(images.shape[0]):
if isinstance(images, torch.Tensor):
frame = (images[i].permute(1, 2, 0).cpu().numpy() * 255).astype(np.uint8)
assert (
frame.shape[0] == images.shape[2] and frame.shape[1] == images.shape[3]
), f"Frame shape mismatch: {frame.shape} vs {images.shape}"
assert (
frame.min() >= 0 and frame.max() <= 255
), f"Frame value out of range: {frame.min()} ~ {frame.max()}"
else:
frame = images[i]
frames.append(frame)
frames = np.stack(frames)
iio.imwrite(
output_path,
frames,
fps=fps,
codec="libx264",
pixelformat="yuv420p",
bitrate=bitrate,
macro_block_size=16,
)
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