LocalVideo/local_video_player.buildme.html at main · VideoTogether/LocalVideo · GitHub

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<!DOCTYPE html>
<html>

<head>
    <title>{$LocalVideoPlayerTitle$}</title>
    <script src="./download.js"></script>
    <script src="./local_page.{$language$}.js"></script>
    <script src="./hls.js@1.2.1"></script>
    <link rel="StyleSheet" href="./local_page.css" type="text/css" />
    <script src="./assets/ffmpeg/package/dist/umd/ffmpeg.js"></script>
    <script src="./assets/util/package/dist/umd/index.js"></script>
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
</head>

<body>
    <div class="video-container">
        <div id="videoTitle" class="video-title"></div>
        <video playsinline controls id="hlsVideo">
        </video>
        <button class="button" onclick="transcode()">{$ExportAsfile$}</button>
        <p id="fsAlertMsg" style="color: brown;display: none;">{$FsNotSupport$}</p>
        <p id="message"></p>

    </div>
    <script>
        const language = '{$language$}'
        window.VideoTogetherEasyShare = 'disabled'
        const m3u8Key = window.location.hash.substring(1)
        const m3u8Url = (window.location.hash.substring(1)).split('-end-')[1];

        setTimeout(() => {
            playM3u8(m3u8Url)
        }, 1000);
        async function playM3u8(url) {

            m3u8Data = await readFromIndexedDB('m3u8s', m3u8Key);
            document.querySelector("#videoTitle").innerText = m3u8Data.title;
            console.log(m3u8Data.data)
            let swM3u8Content = transferToSwM3u8(m3u8Data.data, url, m3u8Data.m3u8Id)
            console.log(swM3u8Content);
            navigator.serviceWorker.controller.postMessage({
                source: "VideoTogether",
                type: 2013,
                data: swM3u8Content
            });

            let hlsVideo = document.querySelector("#hlsVideo");
            try {
                if (Hls.isSupported()) {
                    const hls = new Hls({
                        // debug: true,
                        autoStartLoad: true,
                        fragLoadingMaxRetry: 1000,
                        manifestLoadingMaxRetry: 1000,
                        levelLoadingMaxRetry: 1000,
                    });
                    let m3u8Url = (url);
                    hls.loadSource('/fetch-current-m3u8-content');
                    hls.attachMedia(hlsVideo);
                    hlsVideo.load();
                } else {
                    hlsVideo.src = `/fetch-current-m3u8-content`
                    hlsVideo.load()
                }
            } catch { }
        }
    </script>
    <script>
        const { fetchFile } = FFmpegUtil;
        const { FFmpeg } = FFmpegWASM;
        let fallback = (window.showDirectoryPicker == undefined);
        setInterval(() => {
            fallback = (window.showDirectoryPicker == undefined);
            if (fallback) {
                document.querySelector("#fsAlertMsg").style.display = ""
            } else {
                document.querySelector("#fsAlertMsg").style.display = "none"
            }
        }, 100);
        let writable;
        async function getDownloadFileHanlder(filename) {
            if (fallback) {
                return;
            }
            filename = sanitizeFilename(filename)
            // Request permission for a directory from the user
            window.showDirectoryPicker().then(handle => {
                return handle.getFileHandle(filename, { create: true });
            }).then(f => {
                return f.createWritable()
            }).then(w => {
                writable = w;
            })
        }

        async function writeFileWithSeek(position, data) {
            const writeParams = {
                type: 'write',
                position: position, // This is where in the file you want to seek to
                data: data,         // The data you want to write
            };
            await writable.write(writeParams);
        }
        let ffmpeg = null;
        let files = []

        let swM3u8Content
        let m3u8Data

        async function onCompleted() {
            if (!fallback) {
                await writable.close();
            } else {
                const data = await ffmpeg.readFile('output.mp4');
                const blob = new Blob([data.buffer], { type: 'video/mp4' });
                const url = URL.createObjectURL(blob);
                const a = document.createElement('a');
                a.href = url;
                a.download = `${m3u8Data.title}.mp4`;
                a.click();
            }

            ffmpeg.terminate()
        }

        let seqNum = 0;

        let lastOutputEndPosition = 0;
        let lastOutputSeqNum = 0;

        let lastSeekOffset = -1;
        let lastSeekOffsetSeqNum = 0;
        let nextOutputChunkId = 0;
        async function ffmpegExec(swM3u8Content) {
            seqNum = 0;
            nextOutputChunkId = 0;
            lastOutputEndPosition = 0;
            lastOutputSeqNum = 0;
            lastSeekOffset = -1;
            lastSeekOffsetSeqNum = 0;
            seekused = {}

            ffmpeg = new FFmpeg();
            const message = document.getElementById('message');

            ffmpeg.on("log", async ({ message }) => {
                console.log(message);
                const thisSeqNum = seqNum++;

                if (message.startsWith('Close file: ')) {
                    const filename = message.split('Close file: ')[1].split(' successfully.')[0];
                    if (!filename.startsWith('output')) {
                        await ffmpeg.deleteFile(filename)
                    } else {
                        setTimeout(() => {
                            onCompleted();
                        }, 1000);
                    }
                } else if (message.startsWith('Waiting for file ')) {
                    const filename = message.split('Waiting for file ')[1].split(' to be created...')[0];
                    if (filename.startsWith('_wait_output')) {
                        while (`_wait_output${nextOutputChunkId}.mp4` != filename) {
                            await new Promise(r => setTimeout(r, 10));
                        }
                        ffmpeg.writeFile(filename, '')
                    } else {
                        const item = files.find(item => "./" + item.name == filename);
                        await ffmpeg.writeFile(item.name, await fetchFile(item.url));
                    }
                } else if (message.startsWith('Write chunk output file: ')) {
                    const filename = message.split('Write chunk output file: ')[1].split(';')[0];
                    const currentPosition = (lastSeekOffsetSeqNum > lastOutputSeqNum && lastSeekOffsetSeqNum < thisSeqNum) ? lastSeekOffset : lastOutputEndPosition

                    while (`output${nextOutputChunkId}.mp4` != filename) {
                        await new Promise(r => setTimeout(r, 10));
                    }
                    const outputChunk = await ffmpeg.readFile(filename);
                    writeFileWithSeek(currentPosition, outputChunk);
                    lastOutputEndPosition = currentPosition + outputChunk.length;
                    lastOutputSeqNum = thisSeqNum;
                    await ffmpeg.deleteFile(filename)
                    nextOutputChunkId++;
                } else if (message.startsWith('file_seek file: output.mp4; ')) {
                    const position = parseInt(message.split('file_seek file: output.mp4; ')[1].split(';')[0]);
                    lastSeekOffset = position;
                    lastSeekOffsetSeqNum = thisSeqNum;
                }
            })

            ffmpeg.on("progress", ({ progress, time }) => {
                message.innerText = `{$DownloadingDontClosePage$}: ${progress * 100} %`;
            });
            message.innerText = "{$DownloadingFFmepg$}"
            await ffmpeg.load({
                coreURL: "/assets/core/package/dist/umd/ffmpeg-core.js",
            });

            await ffmpeg.writeFile('input.m3u8', swM3u8Content)
            setTimeout(async () => {
                const batch_size = 10;
                for (let i = 0; i < files.length; i += batch_size) {
                    const tasks = []
                    for (let j = i; j < files.length && j < i + batch_size; j++) {
                        const item = files[j];
                        tasks.push(fetchFile(item.url).then(data => ffmpeg.writeFile(item.name, data)))
                    }
                    await Promise.all(tasks);
                }
            }, 1);
            try {
                if (fallback) {
                    await ffmpeg.writeFile('full_output', '');
                }
                await ffmpeg.exec(['-allowed_extensions', 'ALL', '-i', 'input.m3u8', '-c', 'copy', 'output.mp4']);

            } catch (e) {
                console.error(e);
            }
        }

        async function transcode() {
            writable = undefined
            await getDownloadFileHanlder(`${m3u8Data.title}.mp4`)
            while (writable == undefined && !fallback) {
                await new Promise(r => setTimeout(r, 100));
            }
            files = []
            const message = document.getElementById('message');
            let globalId = 0;
            const urlTrans = function (url) {
                console.log(url)
                const filename = (globalId++) + url.split('/').pop();
                files.push({
                    name: filename,
                    url: url
                })
                return './' + filename;
            }
            swM3u8Content = transferToSwM3u8(m3u8Data.data, m3u8Url, m3u8Data.m3u8Id, urlTrans)
            ffmpegExec(swM3u8Content);
        }

        function sanitizeFilename(input) {
            const INVALID_CHARACTERS = /[\/\\:?"<>|*]/g;
            let sanitized = input.replace(INVALID_CHARACTERS, '_');
            sanitized = sanitized.trim();
            const INVALID_FILENAMES = /^(con|prn|aux|nul|com[0-9]|lpt[0-9])$/i;
            if (INVALID_FILENAMES.test(sanitized)) {
                sanitized = '_' + sanitized + '_';
            }
            const MAX_FILENAME_LENGTH = 255;
            if (sanitized.length > MAX_FILENAME_LENGTH) {
                sanitized = sanitized.substring(0, MAX_FILENAME_LENGTH);
            }

            return sanitized;
        }
    </script>
</body>

</html>