Android - 显示来自 URL 的视频缩略图
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/23522124/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示：将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间：2020-08-20 07:13:43 来源:igfitidea点击:
Android - Display a video thumbnail from a URL
提问by Chulo
I need to display a video thumbnail based to a URLinto an ImageViewview child of my ListViewitems, i have found this postbut not worked.
我需要将基于URL的视频缩略图显示到ImageView我的ListView项目的视图子项中，我找到了这篇文章，但没有用。
Result
结果
Code
代码
thumb_image.setImageBitmap(new LoadVideoThumbnail().execute(URLs.videos +"/"+videos.get(position).getId()+".mp4").get());
AsyncTask
异步任务
public class LoadVideoThumbnail extends AsyncTask<String, Object, Bitmap>{
@Override
protected Bitmap doInBackground(String... objectURL) {
//return ThumbnailUtils.createVideoThumbnail(objectURL[0], Thumbnails.MINI_KIND);
return ThumbnailUtils.extractThumbnail(ThumbnailUtils.createVideoThumbnail(objectURL[0], Thumbnails.MINI_KIND), 100, 100);
}
@Override
protected void onPostExecute(Bitmap result){
//img.setImageBitmap(result);
}
}
回答by KishuDroid
Without downloading video you can generate thumbnail of video by using below method :
无需下载视频，您可以使用以下方法生成视频缩略图：
public static Bitmap retriveVideoFrameFromVideo(String videoPath)throws Throwable
{
Bitmap bitmap = null;
MediaMetadataRetriever mediaMetadataRetriever = null;
try
{
mediaMetadataRetriever = new MediaMetadataRetriever();
if (Build.VERSION.SDK_INT >= 14)
mediaMetadataRetriever.setDataSource(videoPath, new HashMap<String, String>());
else
mediaMetadataRetriever.setDataSource(videoPath);
// mediaMetadataRetriever.setDataSource(videoPath);
bitmap = mediaMetadataRetriever.getFrameAtTime(1, MediaMetadataRetriever.OPTION_CLOSEST);
}
catch (Exception e)
{
e.printStackTrace();
throw new Throwable("Exception in retriveVideoFrameFromVideo(String videoPath)"+ e.getMessage());
}
finally
{
if (mediaMetadataRetriever != null)
{
mediaMetadataRetriever.release();
}
}
return bitmap;
}
回答by Wallace Roberto
With glide, i am use with Glide 4.8.0
使用 Glide，我使用 Glide 4.8.0
long thumb = getLayoutPosition()*1000;
RequestOptions options = new RequestOptions().frame(thumb);
Glide.with(getBaseContext()).load(url).apply(options).into(mThumb);
回答by TejaDroid
@CommonsWare,
@CommonsWare，
This is not the case that for every video store individual thumbnail in server. but we have some library
对于每个视频在服务器中存储单独的缩略图，情况并非如此。但我们有一些图书馆
fmmr.jar with using jniLibs
使用 jniLibs 的 fmmr.jar
which directly provide the thumbnail from server url with in 10 second.
它在 10 秒内直接从服务器 url 提供缩略图。
The sample codefor Thumbnail.
缩略图的示例代码。
FFmpegMediaMetadataRetriever fmmr = new FFmpegMediaMetadataRetriever();
try {
fmmr.setDataSource(videoPath);
Bitmap b = fmmr.getFrameAtTime();
if (b != null) {
Bitmap b2 = fmmr.getFrameAtTime(4000000, FFmpegMediaMetadataRetriever.OPTION_CLOSEST_SYNC);
if (b2 != null) {
b = b2;
}
}
if (b != null) {
Log.i("Thumbnail", "Extracted frame");
return b;
} else {
Log.e("Thumbnail", "Failed to extract frame");
}
} catch (IllegalArgumentException ex) {
ex.printStackTrace();
} finally {
fmmr.release();
}
回答by Pratik Vyas
Hello try this snippet working in my case
你好，试试这个片段在我的情况下工作
Uri videoUri = data.getData();
String selectedPathVideo="";
selectedPathVideo = ImageFilePath.getPath(getApplicationContext(), videoUri);
Log.i("Image File Path", ""+selectedPathVideo);
try {
Bitmap thumb = ThumbnailUtils.createVideoThumbnail(selectedPathVideo, MediaStore.Video.Thumbnails.MICRO_KIND);
imgFarmerVideo.setImageBitmap(thumb);
} catch (Exception e) {
e.printStackTrace();
}
The support class
支持类
public class ImageFilePath {
/**
* Method for return file path of Gallery image
*
* @param context
* @param uri
* @return path of the selected image file from gallery
*/
public static String getPath(final Context context, final Uri uri)
{
//check here to KITKAT or new version
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] {
split[1]
};
return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {
column
};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}
回答by Anil Chandra Varma Dandu
Use android ThumbnailUtils class
使用 android ThumbnailUtils 类
public static Bitmap getThumblineImage(String videoPath) {
return ThumbnailUtils.createVideoThumbnail(videoPath, MINI_KIND);
}
回答by Mattia Franchetto
To display a bitmap preview of a video, just set the video path of the VideoView and let the stream buffer.
要显示视频的位图预览，只需设置 VideoView 的视频路径并让流缓冲。
For example:
例如：
videoView.setVideoPath("/sdcard/myawesomevideo.mp4");
In a few seconds you will see the first frame of the video.
几秒钟后，您将看到视频的第一帧。
