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解决:信息中插入avi格式的视频时,提示“unsupported video format”

2022-07-07 21:50:00 全栈程序员站长

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【測试步骤】:新建信息。加入AVI格式的视频

【測试结果】:加入时弹出提示“unsupported video format”

该问题主要提如今手机彩信视频附件不支持该AVI格式的视频,因此我们通过操作流程对代码进行追踪,查找“unsupported video format”产生的位置。

我们从加入附件界面ComposeMessageActivity类的onActivityResult()方法開始。

–》onActivityResult()调用代码例如以下:

case REQUEST_CODE_ATTACH_VIDEO: if (data != null) { mAttachFileUri = data.getData(); addVideoAsync(mAttachFileUri, false); } break;

–》addVideo()–》setAttachment()<WorkingMessage.java> 调用代码例如以下:

result = append ? appendMedia(type, dataUri, slideShowEditor) : changeMedia(type, dataUri, slideShowEditor);

–》changeMedia()–》internalChangeMedia()–》changeVideo()<SlideshowEditor.java>

–》new VideoModel()<TAG 1-1>

public VideoModel(Context context, Uri uri, RegionModel region) throws MmsException { this(context, null, null, uri, region); initModelFromUri(uri); checkContentRestriction(); }

–》initModelFromUri()<VideoModel.java> 调用代码例如以下:

private void initModelFromUri(Uri uri) throws MmsException { String scheme = uri.getScheme(); if (scheme.equals(“content”)) { initFromContentUri(uri); } else if (uri.getScheme().equals(“file”)) { initFromFile(uri); } initMediaDuration(); }

上述代码通过加入Log进行输出,这里的scheme的值为“file”。

–》initFromFile()

private void initFromFile(Uri uri) throws MmsException { String path = uri.getPath(); mSrc = path.substring(path.lastIndexOf(‘/’) + 1); MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton(); String extension = MimeTypeMap.getFileExtensionFromUrl(mSrc); if (TextUtils.isEmpty(extension)) { // getMimeTypeFromExtension() doesn’t handle spaces in filenames nor can it handle // urlEncoded strings. Let’s try one last time at finding the extension. int dotPos = mSrc.lastIndexOf(‘.’); if (0 <= dotPos) { extension = mSrc.substring(dotPos + 1); } } mContentType = mimeTypeMap.getMimeTypeFromExtension(extension.toLowerCase()); // It’s ok if mContentType is null. Eventually we’ll show a toast telling the // user the video couldn’t be attached. if (TextUtils.isEmpty(mContentType)) { throw new MmsException(“Type of media is unknown.”); }

if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) { Log.v(TAG, “New VideoModel initFromFile created:” + ” mSrc=” + mSrc + ” mContentType=” + mContentType + ” mUri=” + uri); } }

上述代码中对mContentType进行赋值,这里我们通过Log输出,mContentType的值为“video/x-msvideo”。

接下来接着进行构造函数<TAG1-1>中的方法checkContentRestriction()。

protected void checkContentRestriction() throws ContentRestrictionException { ContentRestriction cr = ContentRestrictionFactory.getContentRestriction(); cr.checkVideoContentType(mContentType); }

–》checkVideoContentType()<CarrierContentRestriction.java>

public void checkAudioContentType(String contentType) throws ContentRestrictionException { if (null == contentType) { throw new ContentRestrictionException(“Null content type to be check”); }

if (!sSupportedAudioTypes.contains(contentType)) { throw new UnsupportContentTypeException(“Unsupported audio content type : “ + contentType); } }

上述代码中加粗标识的代码就是測试描写叙述的问题。我们接着分析本类中静态语句快中的代码。

sSupportedVideoTypes = ContentType.getVideoTypes();

终于我们终于到ContentType.java类,而且发现该类中没有加入对该视频格式的支持。因此加入下面代码进行支持。

……

public static final String VIDEO_UNSPECIFIED = “video/*”; public static final String VIDEO_3GPP = “video/3gpp”; public static final String VIDEO_3G2 = “video/3gpp2”; public static final String VIDEO_H263 = “video/h263”; public static final String VIDEO_MP4 = “video/mp4”; public static final String VIDEO_X_MSVIDEO = “video/x-msvideo”;

……

// add supported video types sSupportedVideoTypes.add(VIDEO_X_MSVIDEO); sSupportedVideoTypes.add(VIDEO_3GPP); sSupportedVideoTypes.add(VIDEO_3G2); sSupportedVideoTypes.add(VIDEO_H263); sSupportedVideoTypes.add(VIDEO_MP4);

……

OK!

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https://cloud.tencent.com/developer/article/2043372