python中PyAV视频剪辑，锐化，添加滤镜 增加比特率 代码

好的，以下是使用PyAV进行视频剪辑、锐化、添加滤镜和增加比特率的示例代码：

import av
import numpy as np
from PIL import Image, ImageDraw, ImageFont

# 定义剪辑视频函数
def clip_video(input_file, output_file, start_time, end_time):
    container = av.open(input_file)
    stream = container.streams.video[0]
    codec = stream.codec_context
    fps = stream.average_rate
    width = codec.width
    height = codec.height

    # 计算剪辑后的时间和帧数
    start_pts = int(start_time * fps)
    end_pts = int(end_time * fps)
    duration = end_pts - start_pts

    # 创建输出流
    output_container = av.open(output_file, 'w')
    output_stream = output_container.add_stream('h264', rate=fps)
    output_stream.width = width
    output_stream.height = height
    output_stream.pix_fmt = 'yuv420p'

    # 剪辑视频
    for packet in container.demux(stream):
        if packet.pts < start_pts:
            continue
        if packet.pts >= end_pts:
            break
        for frame in packet.decode():
            output_stream.encode(output_stream.time_base * (frame.pts - start_pts), frame)
    output_container.close()

# 定义锐化和添加滤镜函数
def sharpen_and_filter(input_file, output_file):
    container = av.open(input_file)
    stream = container.streams.video[0]
    codec = stream.codec_context
    fps = stream.average_rate
    width = codec.width
    height = codec.height

    # 创建输出流
    output_container = av.open(output_file, 'w')
    output_stream = output_container.add_stream('h264', rate=fps)
    output_stream.width = width
    output_stream.height = height
    output_stream.pix_fmt = 'yuv420p'

    # 处理视频
    for packet in container.demux(stream):
        for frame in packet.decode():
            # 锐化
            sharpen_kernel = np.array([[-1,-1,-1], [-1,9,-1], [-1,-1,-1]])
            sharpened_frame = cv2.filter2D(frame.to_rgb().to_ndarray(), -1, sharpen_kernel)

            # 添加滤镜
            img = Image.fromarray(sharpened_frame)
            draw = ImageDraw.Draw(img)
            font = ImageFont.truetype('arial.ttf', 60)
            draw.text((100, 100), 'Hello World!', (255, 0, 0), font=font)
            filtered_frame = np.asarray(img)

            # 编码并写入输出流
            output_stream.encode(output_stream.time_base * frame.pts, av.VideoFrame.from_ndarray(filtered_frame, format='rgb24'))
    output_container.close()

# 定义增加比特率函数
def increase_bitrate(input_file, output_file, bitrate):
    container = av.open(input_file)
    stream = container.streams.video[0]

    # 创建输出流
    output_container = av.open(output_file, 'w')
    output_stream = output_container.add_stream('h264', rate=stream.average_rate)
    output_stream.width = stream.codec_context.width
    output_stream.height = stream.codec_context.height
    output_stream.pix_fmt = 'yuv420p'
    output_stream.bit_rate = bitrate

    # 处理视频
    for packet in container.demux(stream):
        for frame in packet.decode():
            output_stream.encode(output_stream.time_base * frame.pts, frame)
    output_container.close()

# 调用剪辑视频函数
clip_video('input.mp4', 'output1.mp4', 10, 20)

# 调用锐化和添加滤镜函数
sharpen_and_filter('output1.mp4', 'output2.mp4')

# 调用增加比特率函数
increase_bitrate('output2.mp4', 'output3.mp4', 2000000)

你只需要修改函数中的输入文件路径、输出文件路径、剪辑时间、滤镜效果和比特率等参数，然后调用相应的函数即可进行视频剪辑、锐化、添加滤镜和增加比特率等操作。