README.md

@@ -29,12 +29,9 @@ evanEnv.enableAutoDownload = true
 
 ## 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 mediasource_0_0.mp4 -i mediasource_0_1.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
 

downloadMedia.js

@@ -19,44 +19,29 @@ evanEnv.enableAutoDownload = true;
 
 (function () {
     evanEnv.videos = document.getElementsByTagName('video');
-    evanEnv.downloadRawData = function (bufferList, fileName = 'out', ext = '.mp4') {
+    evanEnv.buildArrayBuffer = function (bufferList) {
-        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 tmp = new Uint8Array(totalLength);
         var lastLength = 0;
-        var part = 0;
         for (var ix = 0; ix < bufferList.length; ix++) {
-            //10485760
+            tmp.set(new Uint8Array(bufferList[ix]), lastLength);
-            //1073741824
-
-            buffList[part].set(new Uint8Array(bufferList[ix]), lastLength);
             lastLength += bufferList[ix].byteLength;
-            if (lastLength > 1073741824) {
-                part++;
-                lastLength = 0
-            }
         }
-
+        return tmp.buffer;
-        for (var iz = 0; iz < buffList.length; iz++) {
+    };
-            var buff = buffList[iz];
+    evanEnv.downloadRawData = function (bufferList, fileName = 'out.mp4') {
-            let url = window.URL.createObjectURL(new Blob([buff], { type: "arraybuffer" }))
+        var buff = evanEnv.buildArrayBuffer(bufferList);
-            const link = document.createElement('a');
+        let url = window.URL.createObjectURL(new Blob([buff], {type: "arraybuffer"}))
-            link.style.display = 'none';
+        const link = document.createElement('a');
-            link.href = url;
+        link.style.display = 'none';
-            link.setAttribute('download', fileName + "_" + iz + ext);
+        link.href = url;
-            document.body.appendChild(link);
+        link.setAttribute('download', fileName);
-            link.click();
+        document.body.appendChild(link);
-            document.body.removeChild(link);
+        link.click();
-        }
+        document.body.removeChild(link);
-
     };
 
     evanEnv.download = function () {
@@ -64,7 +49,7 @@ evanEnv.enableAutoDownload = true;
             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);
+                    evanEnv.downloadRawData(currentItem.rawSources[x], 'mediasource_' + i + '_' + x + '.mp4');
                 }
             }
             currentItem.downloaded = true;
@@ -72,7 +57,7 @@ evanEnv.enableAutoDownload = true;
     };
     evanEnv.downloadMediaSource = function (mediaSource) {
         for (var x = 0; x < mediaSource.rawSources.length; x++) {
-            evanEnv.downloadRawData(mediaSource.rawSources[x], 'mediasource_' + x);
+            evanEnv.downloadRawData(mediaSource.rawSources[x], 'mediasource_' + x + '.mp4');
             mediaSource.downloaded = true;
         }
     };