58 lines
1.7 KiB
Markdown
58 lines
1.7 KiB
Markdown
---
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title: RTSP
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---
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{% include_relative _page_fragments/supported-formats-rtsp.md %}
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## Using MediaItem ##
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To play an RTSP stream, you need to depend on the RTSP module.
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~~~
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implementation 'com.google.android.exoplayer:exoplayer-rtsp:2.X.X'
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~~~
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{: .language-gradle}
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You can then create a `MediaItem` for an RTSP URI and pass it to the player.
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~~~
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// Create a player instance.
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SimpleExoPlayer player = new SimpleExoPlayer.Builder(context).build();
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// Set the media item to be played.
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player.setMediaItem(MediaItem.fromUri(rtspUri));
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// Prepare the player.
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player.prepare();
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~~~
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{: .language-java}
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## Using RtspMediaSource ##
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For more customization options, you can create an `RtspMediaSource` and pass it
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directly to the player instead of a `MediaItem`.
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~~~
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// Create an RTSP media source pointing to an RTSP uri.
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MediaSource mediaSource =
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new RtspMediaSource.Factory()
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.createMediaSource(MediaItem.fromUri(rtspUri));
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// Create a player instance.
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SimpleExoPlayer player = new SimpleExoPlayer.Builder(context).build();
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// Set the media source to be played.
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player.setMediaSource(mediaSource);
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// Prepare the player.
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player.prepare();
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~~~
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{: .language-java}
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## Using RTSP behind a NAT ##
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ExoPlayer uses UDP as the default protocol for RTP transport.
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When streaming RTSP behind a NAT layer, the NAT might not be able to forward the
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incoming RTP/UDP packets to the device. This occurs if the NAT lacks the
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necessary UDP port mapping. If ExoPlayer detects there have not been incoming
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RTP packets for a while and the playback has not started yet, ExoPlayer tears
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down the current RTSP playback session, and retries playback using RTP-over-RTSP
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(transmitting RTP packets using the TCP connection opened for RTSP).
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