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56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
import path from 'path';
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import { exec } from 'child_process';
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/**
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* 提取关键帧
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* @param inputFilePath
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* @param outputFolderPath
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* @param frameCount
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* @returns {Promise<unknown>}
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*/
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export async function extractKeyframes(inputFilePath, outputFolderPath, frameCount = 20) {
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return new Promise((resolve, reject) => {
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// 创建输出文件夹路径
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const outputFilePattern = path.join(outputFolderPath, 'keyframe_%03d.jpg');
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// 构建FFmpeg命令
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const ffmpegCommand = `ffmpeg -i "${inputFilePath}" -vf "select=eq(pict_type\\,I)" -vsync drop -vframes ${frameCount} -qscale:v 2 "${outputFilePattern}"`;
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// 执行FFmpeg命令
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exec(ffmpegCommand, (error, stdout, stderr) => {
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if (error) {
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reject(`[R插件][ffmpeg工具]执行FFmpeg命令时出错: ${ stderr }`);
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} else {
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logger.info(`[R插件][ffmpeg工具]关键帧成功提取到 ${ outputFolderPath }`);
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resolve(outputFolderPath);
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}
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});
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});
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}
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/**
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* 使用 ffmpeg 将 FLV 文件转换为 MP4 文件
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* @param {string} inputFilePath - 输入的 FLV 文件路径
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* @param {string} outputFilePath - 输出的 MP4 文件路径
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* @returns {Promise<string>} - 返回一个 Promise，成功时返回输出文件路径，失败时返回错误信息
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*/
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function convertFlvToMp4(inputFilePath, outputFilePath) {
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return new Promise((resolve, reject) => {
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const command = `ffmpeg -i ${inputFilePath} ${outputFilePath}`;
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logger.info(`[R插件][ffmpeg工具]执行命令：${command}`);
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exec(command, (error, stdout, stderr) => {
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if (error) {
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reject(`执行 ffmpeg 命令时出错: ${error.message}`);
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return;
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}
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if (stderr) {
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reject(`ffmpeg 标准错误输出: ${stderr}`);
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return;
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}
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resolve(outputFilePath);
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});
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});
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}
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