2

ビデオの URL (例: www.example.com/video.mp4) を指定して、Android でビデオの短いクリップ (例: 5 秒、00:00:10 - 00:00:15) をプログラムで保存するにはどうすればよいですか?電話へのアプリケーション？

現時点では、これが私が持っているものですが、これにより、ビデオ全体が URL からデバイスに保存されます。MediaExtractor と MediaMuxer を使用する必要があるようです。

URL url = new URL(http_url_path);
URLConnection ucon = url.openConnection();

// Define InputStreams to read from the URLConnection.
// uses 5KB download buffer
InputStream is = ucon.getInputStream();
BufferedInputStream in = new BufferedInputStream(is, BUFFER_SIZE);
FileOutputStream out = new FileOutputStream(file);
byte[] buff = new byte[BUFFER_SIZE];

int len = 0;
while ((len = in.read(buff)) != -1) {
    out.write(buff, 0, len);
}
4

2 に答える 2

1

isoviewer-1.0-RC-27 に依存します。

public static double[] startTrim(File src, File dst, int startMs, int endMs) throws IOException {
    Movie movie = MovieCreator.build(src.getAbsolutePath());
    List<Track> tracks = movie.getTracks();
    movie.setTracks(new LinkedList<Track>());
    double startTime = startMs/1000;
    double endTime = endMs/1000;
    boolean timeCorrected = false;
    // Here we try to find a track that has sync samples. Since we can only start decoding
    // at such a sample we SHOULD make sure that the start of the new fragment is exactly
    // such a frame
    for (Track track : tracks) {
        if (track.getSyncSamples() != null && track.getSyncSamples().length > 0) {
            if (timeCorrected) {          
                throw new RuntimeException("The startTime has already been corrected by another track with SyncSample. Not Supported.");
            }
            //false,Short interception;true,Long interception
            startTime = correctTimeToSyncSample(track, startTime, true);
            endTime = correctTimeToSyncSample(track, endTime, false);
            timeCorrected = true;
        }
    }
    int x = 0;
    for (Track track : tracks) {
        long currentSample = 0;
        double currentTime = 0;
        long startSample = -1;
        long endSample = -1;
        x++;
        for (int i = 0; i < track.getDecodingTimeEntries().size(); i++) {
            TimeToSampleBox.Entry entry = track.getDecodingTimeEntries().get(i);
            for (int j = 0; j < entry.getCount(); j++) {
                // entry.getDelta() is the amount of time the current sample covers.
                if (currentTime <= startTime) {
                    // current sample is still before the new starttime
                    startSample = currentSample;
                }
                if (currentTime <= endTime) {
                    // current sample is after the new start time and still before the new endtime
                    endSample = currentSample;
                } else {
                    // current sample is after the end of the cropped video
                    break;
                }
                currentTime += (double) entry.getDelta() / (double) track.getTrackMetaData().getTimescale();
                currentSample++;
            }
        }
        movie.addTrack(new CroppedTrack(track, startSample, endSample));
        break;
    }
    Container container = new DefaultMp4Builder().build(movie);  
    if (!dst.exists()) {
        dst.createNewFile();
    }

    FileOutputStream fos = new FileOutputStream(dst);
    FileChannel fc = fos.getChannel();
    container.writeContainer(fc);      
    fc.close();
    fos.close();
    double[] doubleArray = new double[2] ;
    doubleArray[0] = startTime;
    doubleArray[1] = endTime;
    return doubleArray;

}
于 2015-03-09T14:06:42.840 に答える
0

:D または簡単にこのウェブサイトを使用できます :D インテントを使用して必要なリンクを送信するだけです

http://www.videograbber.net/

于 2015-03-15T23:54:32.177 に答える