Question

我需要将基于网址的视频缩略图显示到我的ImageView项目的ListView视图子项中，我找到了此post但未找到工作

结果

enter image description here

代码

        thumb_image.setImageBitmap(new LoadVideoThumbnail().execute(URLs.videos +"/"+videos.get(position).getId()+".mp4").get());

的AsyncTask

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);
        }

    }

Answer 1

如果不下载视频，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;
}

Answer 2

@CommonsWare，

对于服务器中的每个视频存储个别缩略图，情况并非如此。但我们有一些图书馆

使用jniLibs
fmmr.jar

直接从服务器网址提供缩略图，持续10秒。

缩略图的sample code。

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();
        }

Answer 3

您好，请尝试在我的案例中使用此代码段

        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();
        }

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());
    }
}

Answer 4

随着滑行，我与Glide 4.8.0一起使用

  long thumb = getLayoutPosition()*1000;
  RequestOptions options = new RequestOptions().frame(thumb);
  Glide.with(getBaseContext()).load(url).apply(options).into(mThumb);

Answer 5

下面是Kotlin代码，用于从视频路径获取缩略图。

   while (pch != NULL){
        pch = filter(pch);
        printf("%s\n", pch);
        pch = strtok(NULL, " ,.-?'");
    }

调用方法如下。

package com.nischal;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class FileRead {
    public static void main(String[] args) throws IOException {
       File src = new File("D:\\Nischal.xlsx");
       FileInputStream fis=new FileInputStream(src);
       XSSFWorkbook wb=new XSSFWorkbook(fis);
       XSSFSheet sh1= wb.getSheetAt(0);
               
     System.out.println(sh1.getRow(0).getCell(0).getStringCellValue());
     System.out.println(sh1.getRow(0).getCell(1).getStringCellValue());

      } 
}

Answer 6

使用android ThumbnailUtils类

  public static Bitmap getThumblineImage(String videoPath) {
    return ThumbnailUtils.createVideoThumbnail(videoPath, MINI_KIND);
  }

Answer 7

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。

例如：

videoView.setVideoPath("/sdcard/myawesomevideo.mp4");

几秒钟后，您将看到视频的第一帧。

Android - 显示来自网址的视频缩略图

7 个答案: