update

README.md

@@ -21,23 +21,24 @@
 
 ## 参数
 ```javascript
-//自动快进
-evanEnv.enableAutoForward = true
+//快进抓取
+jsMedia.setSpeed(10);
 //完成后自动下载
-evanEnv.enableAutoDownload = true
+jsMedia.enableAutoDownload = true;
+//手工触发下载
+jsMedia.download();
 ```
 
 ## FFmpeg合并示例
 ```shell
-ffmpeg -i mediasource_0_0_0.mp4 -i mediasource_0_1_0.mp4 -c copy -bsf:a aac_adtstoasc out.mp4
+ffmpeg -i audio.mp4 -acodec copy audio.aac
+ffmpeg -i audio.aac -i video.mp4 -c copy -bsf:a aac_adtstoasc out.mp4
 ```
 
 ## 大文件分段需要先文件合并
-copy /b mediasource_0_0_*.mp4 out.mp4
-
-## 常见问题
-- 合并后声音播放不正常:由于部分网站使用了HE-AAC v2(AAC+SBR+PS)作为音频编码,大部分播放器还不支持此音频流格式,故声音不正常,使用Windows自带的视频播放器播放正常
-
+```
+copy /b media_0_*.mp4 out.mp4
+```
 
 ## 特别说明
 - 仅限内部交流使用,请勿用于非法用途

downloadMedia.js

@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         Universal encrypted video downloader
 // @namespace    http://tampermonkey.net/
-// @version      0.1
+// @version      1.1
 // @description  Bypass the encrypted video download protection via js hook
 // @author       Evan
 // @match        https://www.bilibili.com/video/*
@@ -12,68 +12,84 @@
 // @grant        none
 // ==/UserScript==
 
-evanEnv = new Object();
-evanEnv.mediaSources = [];
-evanEnv.enableAutoForward = true;
-evanEnv.enableAutoDownload = true;
+jsMedia = new Object();
+jsMedia.mediaSources = [];
+jsMedia.enableAutoDownload = true;
+//1G
+jsMedia.fragmentSize = 1024*1024*1024;
 
 (function () {
-    evanEnv.videos = document.getElementsByTagName('video');
-    evanEnv.downloadRawData = function (bufferList, fileName = 'out', ext = '.mp4') {
-        var buffList = new Array();
-        var totalLength = 0;
-
-        for (var i = 0; i < bufferList.length; i++) {
-            totalLength += bufferList[i].byteLength;
-            if (totalLength > 1073741824 || i == bufferList.length - 1) {
-                buffList.push(new Uint8Array(totalLength));
-                totalLength = 0;
-            }
-        }
-
-        var lastLength = 0;
-        var part = 0;
-        for (var ix = 0; ix < bufferList.length; ix++) {
-            //10485760
-            //1073741824
-
-            buffList[part].set(new Uint8Array(bufferList[ix]), lastLength);
-            lastLength += bufferList[ix].byteLength;
-            if (lastLength > 1073741824) {
-                part++;
-                lastLength = 0
-            }
-        }
-
-        for (var iz = 0; iz < buffList.length; iz++) {
-            var buff = buffList[iz];
-            let url = window.URL.createObjectURL(new Blob([buff], { type: "arraybuffer" }))
+    let mediaSourceSeq = 0;
+    jsMedia.videos = document.getElementsByTagName('video');
+    jsMedia.addZero = function(num){
+        return ('00' + num).slice(-3);
+    };
+    jsMedia.downloadBlob = function (buff, fileName) {
+        let url = window.URL.createObjectURL(new Blob(buff, { type: "arraybuffer" }))
         const link = document.createElement('a');
         link.style.display = 'none';
         link.href = url;
-            link.setAttribute('download', fileName + "_" + iz + ext);
+        link.setAttribute('download', fileName);
         document.body.appendChild(link);
         link.click();
         document.body.removeChild(link);
+    };
+    jsMedia.calcBlobLength = function (buffList) {
+        let totalLength = 0;
+        for (let i = 0; i < buffList.length; i++) {
+            totalLength = totalLength + buffList[i].byteLength;
+        }
+        return totalLength;
+    };
+    jsMedia.MyMediaSourceBuffer = function () {
+        this.id = 0;
+        this.rawData1 = [];
+        this.rawData2 = [];
+        let currentSlot = 0;
+        let downloadedIndex = 0;
+        this.download = function () {
+            let lastSlot = currentSlot;
+            if (currentSlot === 0) {
+                currentSlot = 1;
+            } else {
+                currentSlot = 0;
+            }
+
+            if (lastSlot == 0) {
+                jsMedia.downloadBlob(this.rawData1, 'media_' + this.id + '_' + jsMedia.addZero(downloadedIndex) + '.mp4');
+                this.rawData1 = [];
+            } else {
+                jsMedia.downloadBlob(this.rawData2, 'media_' +  this.id + '_' + jsMedia.addZero(downloadedIndex) + '.mp4');
+                this.rawData2 = [];
+            }
+            downloadedIndex++;
+        };
+        this.appendBuffer = function (buf) {
+            let totalLength = 0;
+            if (currentSlot === 0) {
+                this.rawData1.push(buf);
+                totalLength = jsMedia.calcBlobLength(this.rawData1);
+            } else {
+                this.rawData2.push(buf);
+                totalLength = jsMedia.calcBlobLength(this.rawData2);
+            }
+            if (totalLength >= jsMedia.fragmentSize) {
+                this.download();
             }
 
         };
 
-    evanEnv.download = function () {
-        for (var i = 0; i < evanEnv.mediaSources.length; i++) {
-            var currentItem = evanEnv.mediaSources[i];
-            if (currentItem.downloaded == undefined || currentItem.downloaded == false) {
-                for (var x = 0; x < currentItem.rawSources.length; x++) {
-                    evanEnv.downloadRawData(currentItem.rawSources[x], 'mediasource_' + i + '_' + x);
-                }
-            }
-            currentItem.downloaded = true;
+    };
+
+    jsMedia.download = function(){
+        for (let i = 0, length = jsMedia.mediaSources.length; i < length; i++) {
+            jsMedia.mediaSources[i].download();
         }
     };
-    evanEnv.downloadMediaSource = function (mediaSource) {
-        for (var x = 0; x < mediaSource.rawSources.length; x++) {
-            evanEnv.downloadRawData(mediaSource.rawSources[x], 'mediasource_' + x);
-            mediaSource.downloaded = true;
+
+    jsMedia.setSpeed = function (speed) {
+        for (let i = 0, length = jsMedia.videos.length; i < length; i++) {
+            jsMedia.videos[i].playbackRate = speed;
         }
     };
 
@@ -81,41 +97,31 @@ evanEnv.enableAutoDownload = true;
     MediaSource.prototype.addSourceBuffer = function (mimeType) {
         var mediaSourceThis = this;
 
-        evanEnv.mediaSources.push(this);
-        this.lastPos = 0;
-        if (evanEnv.enableAutoDownload) {
-            this.onsourceended = function () {
-                evanEnv.download();
-            };
-            this.onsourceclose = function () {
-                evanEnv.downloadMediaSource(this);
-            };
-        }
-
-
         var retSourceBuffer = proxy_addSourceBuffer.apply(this, [].slice.call(arguments));
         if (this.rawSources == undefined) {
             this.rawSources = [];
         }
-        var buffList = [];
-        this.rawSources.push(buffList);
-        retSourceBuffer.rawData = buffList;
-        if (evanEnv.enableAutoForward) {
-            retSourceBuffer.onupdate = function () {
-                if (this.buffered != this.buffered.length > 0) {
-                    var endPos = this.buffered.end(0);
-                    if (endPos > 5 && endPos - mediaSourceThis.lastPos > 25) {
-                        evanEnv.videos[0].currentTime = endPos - 3;
-                        mediaSourceThis.lastPos = evanEnv.videos[0].currentTime;
-                    }
-                }
+
+        retSourceBuffer.mySourceBuffer = new jsMedia.MyMediaSourceBuffer();
+        retSourceBuffer.mySourceBuffer.id = mediaSourceSeq;
+        jsMedia.mediaSources.push(retSourceBuffer.mySourceBuffer);
+  
+
+        if (jsMedia.enableAutoDownload) {
+            this.onsourceended = function () {
+                jsMedia.download();
+            };
+            this.onsourceclose = function () {
+                jsMedia.download();
             };
         }
+
+        mediaSourceSeq++;
         return retSourceBuffer;
     };
     var proxy_appendBuffer = SourceBuffer.prototype.appendBuffer;
     SourceBuffer.prototype.appendBuffer = function (buf) {
-        this.rawData.push(buf);
+        this.mySourceBuffer.appendBuffer(buf);
         return proxy_appendBuffer.apply(this, [].slice.call(arguments));
     };
 })();