is There a Loop Mode ?

[hateum]

How can I add a loop mode ?

[alim-n]

You can play track again when it ends.

[hateum]

How can I do it, can you help me.
on the state == end I make seekTo(0) and it doesn't work :(

[crushonme]

For Dash and Smoothstreaming, you can implements LoopEvaluator from FormatEvaluator in ExoPlayer/library/src/main/java/com/google/android/exoplayer/chunk/FormatEvaluator.java

[hateum]

I use the default one to stream an mp4 video

[crushonme]

/**

• Selects circularly between the available formats.
  */
  public static class LoopEvaluator implements FormatEvaluator {

static int loop = 0;

@Override
public void enable() {
  // Do nothing.
}

@Override
public void disable() {
  // Do nothing.
}

@Override
public void evaluate(List<? extends MediaChunk> queue, long playbackPositionUs,
                     Format[] formats, Evaluation evaluation) {
    evaluation.format = formats[(formats.length - loop%formats.length -1)];
    loop = (++loop )%formats.length;
}

}

[crushonme]

Maybe I misunderstand your means.

[CaptnBlubber]

@crushonme

Where do you apply that looping format evaluator to?
From my understanding this should be in the Renderer?

My Problem: I need Adaptive Streaming AND a endless Video Loop.
Therefore I Changed the AdaptiveStreaming Format Evaluator, since the ChunkSources can only Get One FormatEvaluator:

public class AdaptiveLoopingEvaluator implements FormatEvaluator {

public static final int DEFAULT_MAX_INITIAL_BITRATE = 800000;
public static final int DEFAULT_MIN_DURATION_FOR_QUALITY_INCREASE_MS = 10000;
public static final int DEFAULT_MAX_DURATION_FOR_QUALITY_DECREASE_MS = 25000;
public static final int DEFAULT_MIN_DURATION_TO_RETAIN_AFTER_DISCARD_MS = 25000;
public static final float DEFAULT_BANDWIDTH_FRACTION = 0.75F;
private final BandwidthMeter bandwidthMeter;
private final int maxInitialBitrate;
private final long minDurationForQualityIncreaseUs;
private final long maxDurationForQualityDecreaseUs;
private final long minDurationToRetainAfterDiscardUs;
private final float bandwidthFraction;
private int loop = 0;

public AdaptiveLoopingEvaluator(BandwidthMeter bandwidthMeter) {
    this(bandwidthMeter, 800000, 10000, 25000, 25000, 0.75F);
}

public AdaptiveLoopingEvaluator(BandwidthMeter bandwidthMeter, int maxInitialBitrate, int minDurationForQualityIncreaseMs, int maxDurationForQualityDecreaseMs, int minDurationToRetainAfterDiscardMs, float bandwidthFraction) {
    this.bandwidthMeter = bandwidthMeter;
    this.maxInitialBitrate = maxInitialBitrate;
    this.minDurationForQualityIncreaseUs = (long) minDurationForQualityIncreaseMs * 1000L;
    this.maxDurationForQualityDecreaseUs = (long) maxDurationForQualityDecreaseMs * 1000L;
    this.minDurationToRetainAfterDiscardUs = (long) minDurationToRetainAfterDiscardMs * 1000L;
    this.bandwidthFraction = bandwidthFraction;
}

public void enable() {
}

public void disable() {
}

public void evaluate(List<? extends MediaChunk> queue, long playbackPositionUs, Format[] formats, FormatEvaluator.Evaluation evaluation) {
    long bufferedDurationUs = queue.isEmpty() ? 0L : ((MediaChunk) queue.get(queue.size() - 1)).endTimeUs - playbackPositionUs;
    Format current = evaluation.format;
    Format ideal = this.determineIdealFormat(formats, this.bandwidthMeter.getBitrateEstimate());
    boolean isHigher = ideal != null && current != null && ideal.bitrate > current.bitrate;
    boolean isLower = ideal != null && current != null && ideal.bitrate < current.bitrate;
    if (isHigher) {
        if (bufferedDurationUs < this.minDurationForQualityIncreaseUs) {
            ideal = current;
        } else if (bufferedDurationUs >= this.minDurationToRetainAfterDiscardUs) {
            for (int i = 1; i < queue.size(); ++i) {
                MediaChunk thisChunk = (MediaChunk) queue.get(i);
                long durationBeforeThisSegmentUs = thisChunk.startTimeUs - playbackPositionUs;
                if (durationBeforeThisSegmentUs >= this.minDurationToRetainAfterDiscardUs && thisChunk.format.bitrate < ideal.bitrate && thisChunk.format.height < ideal.height && thisChunk.format.height < 720 && thisChunk.format.width < 1280) {
                    evaluation.queueSize = i;
                    break;
                }
            }
        }
    } else if (isLower && current != null && bufferedDurationUs >= this.maxDurationForQualityDecreaseUs) {
        ideal = current;
    }

    if (current != null && ideal != current) {
        evaluation.trigger = 3;
    }

    evaluation.format = ideal;
    loop = (++loop) % formats.length;
}

private Format determineIdealFormat(Format[] formats, long bitrateEstimate) {
    long effectiveBitrate = bitrateEstimate == -1L ? (long) this.maxInitialBitrate : (long) ((float) bitrateEstimate * this.bandwidthFraction);

    for (int i = 0; i < formats.length; ++i) {
        Format format = formats[i];
        if ((long) format.bitrate <= effectiveBitrate) {
            return format;
        }
    }

    return formats[(formats.length - loop % formats.length - 1)];
}
}

I am using the DashRenderBuilder from the sample code (https://github.com/google/ExoPlayer/blob/master/demo/src/main/java/com/google/android/exoplayer/demo/player/DashRendererBuilder.java), the only difference is that I apply my Class to the videoChunkSource and not the Adaptive one from the samples.

It also Seems that the player gets Released once Media Playback is done, since i cannot switch to another Video when one has finished playing and called STATE_ENDED (wich during playback works....)

[vvincirey]

Can someone explain the solution above?. It is a bit confusing.

[mjsibbald]

Same here, I dont understand what the LoopEvaluator is doing and if its working for looping video. Doesn't feel like it the aswer to the question "is There a Loop Mode ?"

[Cher80]

`

 playerExo.addListener(new ExoPlayer.Listener() {

            @Override
            public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {

                switch(playbackState) {
                    case ExoPlayer.STATE_BUFFERING:
                        break;
                    case ExoPlayer.STATE_ENDED:
                        playerExo.seekTo(0);
                        break;
                    case ExoPlayer.STATE_IDLE:
                        break;
                    case ExoPlayer.STATE_PREPARING:
                        break;
                    case ExoPlayer.STATE_READY:
                        break;
                    default:
                        break;
                }
            }

            @Override
            public void onPlayWhenReadyCommitted() {

            }

            @Override
            public void onPlayerError(ExoPlaybackException error) {

            }
        });
        playerExo.seekTo(0);
        playerExo.setPlayWhenReady(true);

[ojw28]

Seamless looping is supported in dev-v2. See the change description above for information about how to do this.

We'll also be publishing a blog post next week about MediaSource composition, which will include a small section on looping media. I'd suggest subscribing to the blog so you're notified when this happens!

[dmota-systango]

You can use LoopingMediaSource as source instead.

MediaSource source = new ExtractorMediaSource(videoUri, ...);
// Loops the video indefinitely.
LoopingMediaSource loopingSource = new LoopingMediaSource(source);

Ref: https://google.github.io/ExoPlayer/guide.html#seamlessly-looping-a-video