video_rewriting/common/ffmpeg.py

import asyncio
import os
import subprocess
import time
from typing import List

import cv2
from loguru import logger
from mutagen.mp3 import MP3



class FFmpeg():
    """获取mp3时长"""
    @classmethod
    def get_mp3_duration(cls, file_path):
        audio = MP3(file_path)
        duration = audio.info.length
        if duration:
            return int(duration)
        return 0

    """
    时间转换
    """
    @classmethod
    def seconds_to_srt_time(cls, seconds):
        hours = int(seconds // 3600)
        minutes = int((seconds % 3600) // 60)
        seconds = seconds % 60
        milliseconds = int((seconds - int(seconds)) * 1000)
        return f"{hours:02d}:{minutes:02d}:{int(seconds):02d},{milliseconds:03d}"

    """
    获取单个视频时长
    """
    @classmethod
    def get_video_duration(cls, video_url):
        cap = cv2.VideoCapture(video_url)
        if cap.isOpened():
            rate = cap.get(5)
            frame_num = cap.get(7)
            duration = int(frame_num / rate)
            return duration
        return 0

    """视频转为640像素"""

    @classmethod
    def video_640(cls, video_path, file_path):
        video_url = file_path + 'pixelvideo.mp4'
        try:
            cls.asyncio_run_subprocess(["ffmpeg", "-i", video_path, "-vf", "scale=360:640", video_url], timeout=420)
            return video_url
        except Exception as e:
            return video_url
    """
    获取视频宽高
    """
    @classmethod
    def get_w_h_size(cls, new_video_path):
        try:
            # 获取视频的原始宽高信息
            ffprobe_cmd = cls.asyncio_run_subprocess(
                ["ffprobe", "-v", "error", "-select_streams", "v:0", "-show_entries", "stream=width,height", "-of",
                 "csv=p=0", new_video_path], timeout=10)
            output_decoded = ffprobe_cmd.strip()
            split_output = [value for value in output_decoded.split(',') if value.strip()]
            height, width = map(int, split_output)
            return width, height
        except ValueError as e:
            return 1920, 1080

    """
    视频裁剪
    """
    @classmethod
    def video_crop(cls, new_video_path, video_path_url, pw_random_id):
        crop_url = video_path_url + str(pw_random_id) + 'crop.mp4'
        # 获取视频的原始宽高信息
        ffprobe_cmd = cls.asyncio_run_subprocess(
            ["ffprobe", "-v", "error", "-select_streams", "v:0", "-show_entries", "stream=width,height", "-of",
             "csv=p=0", new_video_path], timeout=10)
        width, height = map(int, ffprobe_cmd.strip().split(','))
        # 计算裁剪后的高度
        new_height = int(height * 0.8)

        # 构建 FFmpeg 命令,裁剪视频高度为原始高度的80%
        cls.asyncio_run_subprocess(
            [
                "ffmpeg",
                "-i", new_video_path,
                "-vf", f"crop={width}:{new_height}",
                "-c:v", "libx264",
                "-c:a", "aac",
                "-y",
                crop_url
            ], timeout=240)
        return crop_url

    """
    视频截断
    """
    @classmethod
    def video_ggduration(cls, new_video_path, video_path_url, pw_random_id, gg_duration_total):
        gg_duration_url = video_path_url + str(pw_random_id) + 'gg_duration.mp4'
        # 获取视频时长
        total_duration = cls.get_video_duration(new_video_path)
        if total_duration == 0:
            return gg_duration_url
        duration = int(total_duration) - int(gg_duration_total)
        if int(total_duration) < int(gg_duration_total):
            return gg_duration_url
        cls.asyncio_run_subprocess([
            "ffmpeg",
            "-i", new_video_path,
            "-c:v", "libx264",
            "-c:a", "aac",
            "-t", str(duration),
            "-y",
            gg_duration_url
        ], timeout=360)
        return gg_duration_url

    """
     截取原视频最后一帧
    """
    @classmethod
    def video_png(cls, new_video_path, video_path_url, pw_random_id):
        """
        jpg_url 生成图片位置
        :param new_video_path: 视频地址
        :return:
        """
        # 获取视频的原始宽高信息
        jpg_url = video_path_url + str(pw_random_id) + 'png.jpg'
        # 获取视频时长
        cls.asyncio_run_subprocess(
            ["ffmpeg", "-sseof", "-1", '-i', new_video_path, '-frames:v', '1', "-y", jpg_url], timeout=120)
        return jpg_url

    """
    获取视频音频
    """
    @classmethod
    def get_video_mp3(cls, video_file, video_path_url, pw_random_id):
        pw_mp3_path = video_path_url + str(pw_random_id) +'pw_video.mp3'
        cls.asyncio_run_subprocess([
            'ffmpeg',
            '-i', video_file,
            '-q:a', '0',
            '-map', 'a',
            pw_mp3_path
        ], timeout=120)
        time.sleep(1)
        return pw_mp3_path

    """横屏视频改为竖屏"""
    @classmethod
    def update_video_h_w(cls, new_video_path, video_path_url, pw_random_id):
        video_h_w_path = video_path_url + str(pw_random_id) +'video_h_w_video.mp4'
        cls.asyncio_run_subprocess(
            ["ffmpeg", "-i", new_video_path, "-vf", "scale=640:ih*640/iw,pad=iw:iw*16/9:(ow-iw)/2:(oh-ih)/2",
             video_h_w_path], timeout=420)
        return video_h_w_path

    """横屏视频顶部增加字幕"""
    @classmethod
    def add_video_zm(cls, new_video_path, video_path_url, pw_random_id, new_text):
        single_video_srt = video_path_url + str(pw_random_id) +'video_zm.srt'
        single_video_txt = video_path_url + str(pw_random_id) +'video_zm.txt'
        single_video = video_path_url + str(pw_random_id) +'video_zm.mp4'
        duration = cls.get_video_duration(new_video_path)
        if duration == 0:
            return new_video_path
        start_time = cls.seconds_to_srt_time(0)
        end_time = cls.seconds_to_srt_time(duration)
        # zm = '致敬伟大的教员，为整个民族\n感谢老人家历史向一代伟人'
        with open(single_video_txt, 'w') as f:
            f.write(f"file '{new_video_path}'\n")
        with open(single_video_srt, 'w') as f:
            f.write(f"1\n{start_time} --> {end_time}\n{new_text}\n\n")
        subtitle_cmd = f"subtitles={single_video_srt}:force_style='Fontsize=12,Fontname=wqy-zenhei,Outline=2,PrimaryColour=&H00FFFF,SecondaryColour=&H000000,Bold=1,MarginV=225'"
        draw = f"{subtitle_cmd}"
        cls.asyncio_run_subprocess([
            "ffmpeg",
            "-f", "concat",
            "-safe", "0",
            "-i", single_video_txt,
            "-c:v", "libx264",
            "-c:a", "aac",
            "-vf", draw,
            "-y",
            single_video
        ], timeout=500)
        return single_video


    """
     生成片尾视频
    """
    @classmethod
    def pw_video(cls, jpg_url, video_path_url, pw_srt, pw_random_id, pw_mp3_path):
        # 添加音频到图片
        """
        jpg_url 图片地址
        pw_video 提供的片尾视频
        pw_duration  提供的片尾视频时长
        new_video_path 视频位置
        subtitle_cmd 字幕
        pw_url 生成视频地址
        :return:
        """
        pw_srt_path = video_path_url + str(pw_random_id) +'pw_video.srt'
        # 创建临时字幕文件
        with open(pw_srt_path, 'w') as f:
            f.write(pw_srt)
        # 片尾位置
        pw_url_path = video_path_url + str(pw_random_id) + 'pw_video.mp4'
        # 获取视频时长
        pw_duration = cls.get_mp3_duration(pw_mp3_path)
        if pw_duration == 0:
            return pw_url_path
        time.sleep(2)
        # 添加字幕 wqy-zenhei  Hiragino Sans GB
        height = 1080
        margin_v = int(height) // 8  # 可根据需要调整字幕和背景之间的距离
        subtitle_cmd = f"subtitles={pw_srt_path}:force_style='Fontsize=13,Fontname=wqy-zenhei,Outline=0,PrimaryColour=&H000000,SecondaryColour=&H000000,Bold=1,MarginV={margin_v}'"
        bg_position_offset = (int(360) - 360//8) / 1.75
        background_cmd = f"drawbox=y=(ih-{int(360)}/2-{bg_position_offset}):color=yellow@1.0:width=iw:height={int(360)}/4:t=fill"

        cls.asyncio_run_subprocess([
            'ffmpeg',
            '-loop', '1',
            '-i', jpg_url,  # 输入的图片文件
            '-i', pw_mp3_path,  # 输入的音频文件
            '-c:v', 'libx264',  # 视频编码格式
            '-t', str(pw_duration),  # 输出视频的持续时间，与音频持续时间相同
            '-pix_fmt', 'yuv420p',  # 像素格式
            '-c:a', 'aac',  # 音频编码格式
            '-strict', 'experimental',  # 使用实验性编码器
            '-shortest',  # 确保输出视频的长度与音频一致
            '-vf', f"{background_cmd},{subtitle_cmd}",  # 视频过滤器，设置分辨率和其他过滤器
            pw_url_path  # 输出的视频文件路径
        ], timeout=500)
        if os.path.exists(pw_srt_path):
            os.remove(pw_srt_path)
        return pw_url_path

    """视频拼接到一起"""
    @classmethod
    def h_b_video(cls, video_path, pw_path, file_path):
        video_url = file_path + 'hbvideo.mp4'
        try:
            cls.asyncio_run_subprocess(["ffmpeg", "-i", video_path, "-i", pw_path, "-filter_complex",
                                        "[0:v]scale=360:640[v1]; [1:v]scale=360:640[v2]; [v1][0:a][v2][1:a]concat=n=2:v=1:a=1[outv][outa]",
                                        "-map", "[outv]", "-map", "[outa]", video_url], timeout=500)
            return video_url
        except Exception as e:
            return video_url
    """
    单个视频拼接
    """
    @classmethod
    def single_video(cls, new_video_path, video_path_url, zm):
        single_video_url = video_path_url + 'single_video.mp4'
        single_video_srt = video_path_url + 'single_video.srt'
        # 获取时长
        duration = cls.get_video_duration(new_video_path)
        if duration == 0:
            return single_video_url
        start_time = cls.seconds_to_srt_time(2)
        end_time = cls.seconds_to_srt_time(duration)
        single_video_txt = video_path_url + 'single_video.txt'
        with open(single_video_txt, 'w') as f:
            f.write(f"file '{new_video_path}'\n")
        if zm:
            with open(single_video_srt, 'w') as f:
                f.write(f"1\n{start_time} --> {end_time}\n<font color=\"red\">\u2764\uFE0F</font>{zm}\n\n")
            subtitle_cmd = f"subtitles={single_video_srt}:force_style='Fontsize=14,Fontname=wqy-zenhei,Outline=2,PrimaryColour=&H00FFFF,SecondaryColour=&H000000,Bold=1,MarginV=20'"
        else:
            subtitle_cmd = f"force_style='Fontsize=14,Fontname=wqy-zenhei,Outline=2,PrimaryColour=&H00FFFF,SecondaryColour=&H000000,Bold=1,MarginV=20'"
        # 多线程数
        num_threads = 5
        # 构建 FFmpeg 命令,生成视频
        cls.asyncio_run_subprocess([
            "ffmpeg",
            "-f", "concat",
            "-safe", "0",
            "-i", f"{single_video_txt}",
            "-c:v", "libx264",
            "-c:a", "aac",
            '-b:v', '260k',
            "-b:a", "96k",
            "-threads", str(num_threads),
            "-vf", subtitle_cmd,
            "-y",
            single_video_url
        ], timeout=400)
        if os.path.exists(single_video_srt):
            os.remove(single_video_srt)
        return single_video_url

    @classmethod
    def asyncio_run_subprocess(cls, params: List[str], timeout: int = 30) -> str:
        async def run_subprocess():
            process = await asyncio.create_subprocess_exec(
                params[0],
                *params[1:],
                stdout=asyncio.subprocess.PIPE,
                stderr=asyncio.subprocess.PIPE,
            )
            try:
                out, err = await asyncio.wait_for(process.communicate(), timeout=timeout)
                if process.returncode != 0:
                    raise IOError(err)
                return out.decode()
            except asyncio.TimeoutError:
                process.kill()
                out, err = await process.communicate()
                raise IOError(err)

        return asyncio.run(run_subprocess())




if __name__ == '__main__':
    new_video_path = '/Users/tzld/Desktop/video_rewriting/path/output1.mp4'
    video_path_url = '/Users/tzld/Desktop/video_rewriting/path/'
    zm = '温馨提示:下方按钮可分享到群'
    FFmpeg.single_video(new_video_path, video_path_url, zm)