digitalmediaserver / cast-api

A Java implementation of a "Google Cast" sender.

Digital Media Server

Digital Media Server is a DLNA compatible UPnP AV Media Server. It is capable of sharing digital video, audio and image resources to UPnP AV and DLNA capable devices. It is based on PS3 Media Server by shagrath and Universal Media Server.

Digital Media Server supports Windows, Linux and macOS. It streams or transcodes many different media formats with little or no configuration. It is powered by MEncoder, FFmpeg, tsMuxeR, AviSynth, MediaInfo, VLC, OpenSubtitles.org and more, which combine to offer support for a wide range of media formats.

Terms of use

By using this software, for any purpose and in any shape or form, you grant your implicit agreement to the following statements:

• You condemn Russia and its military aggression against Ukraine.
• You recognize that Russia is an occupant that unlawfully invaded a sovereign state.
• You support Ukraine's territorial integrity, including its claims over temporarily occupied territories of Crimea and Donbas.
• You reject false narratives perpetuated by Russian state propaganda.

Glory to Ukraine! 🇺🇦

Current Project Developers

• Nadahar
• Sami32

Links

• Source code
• Issue tracker

cast-api's Issues

Running Apps throw unexpected errors

Working around the issue of not having a list of apps. I'm caching the apps. Just fiddling around, i found that several apps give this error. As far as i can see i cannot control this.

2023-01-04 00:59:45.470 [DEBUG] [omecast.internal.ChromecastCommander] - Failed to request media status for app: Application [appId=Netflix, displayName=Netflix, iconUrl=, isIdleScreen=false, launchedFromCloud=false, namespaces=[], sessionId=801bc1fc-c175-4233-9d72-dd69777a5f18, statusText=Netflix, universalAppId=Netflix] with message : application.getTransportId() cannot be null or blank

java.lang.IllegalArgumentException: application.getTransportId() cannot be null or blank
	at org.digitalmediaserver.cast.Util.requireNotBlank(Util.java:149) ~[?:?]
	at org.digitalmediaserver.cast.Channel.startSession(Channel.java:789) ~[?:?]
	at org.digitalmediaserver.cast.CastDevice.startSession(CastDevice.java:803) ~[?:?]
	at org.openhab.binding.chromecast.internal.ChromecastCommander.handleRefresh(ChromecastCommander.java:121) ~[?:?]
	at org.openhab.binding.chromecast.internal.handler.ChromecastHandler$Coordinator.refresh(ChromecastHandler.java:348) ~[?:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[?:?]
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) ~[?:?]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[?:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]

Calling code:

runningApp = status.getRunningApplication()
Session session = chromeCast.startSession(SENDER_ID, runningApp);
MediaStatus mediaStatus = session.getMediaStatus();

Started the apps from the cast device itself and not from the sender. Could it be related to the sourceId param of startsession? I have that set to a static string SENDER_ID = "myVeryFirstCastController" :-)

Edit:
With Amazone prime i get this:

2023-01-04 01:45:37.888 [WARN ] [org.digitalmediaserver.cast.Channel ] - Error while processing JSON message from Unidentified cast device: Cannot construct instance of `org.digitalmediaserver.cast.MediaStatus`, problem: volume cannot be null
 at [Source: UNKNOWN; byte offset: #UNKNOWN]
2023-01-04 01:45:41.788 [ERROR] [org.digitalmediaserver.cast.Channel ] - Received unhandled "MEDIA_STATUS" message from Unidentified cast device, this should not happen: {"requestId":4403,"responseType":"MEDIA_STATUS","status":[{"mediaSessionId":25,"currentItemId":1,"playerState":"PLAYING","currentTime":298.566,"playbackRate":1,"supportedMediaCommands":13,"repeatMode":"REPEAT_OFF"}]}
2023-01-04 01:45:41.788 [DEBUG] [ast.internal.ChromecastEventReceiver] - Received an 'UNKNOWN' event (class=class com.fasterxml.jackson.databind.JsonNode)
2023-01-04 01:45:43.628 [ERROR] [org.digitalmediaserver.cast.Channel ] - Received unhandled "MEDIA_STATUS" message from Unidentified cast device, this should not happen: {"requestId":4364,"responseType":"MEDIA_STATUS","status":[{"mediaSessionId":25,"currentItemId":1,"playerState":"PLAYING","currentTime":300.417,"playbackRate":1,"supportedMediaCommands":13,"repeatMode":"REPEAT_OFF"}]}
2023-01-04 01:45:43.629 [DEBUG] [ast.internal.ChromecastEventReceiver] - Received an 'UNKNOWN' event (class=class com.fasterxml.jackson.databind.JsonNode)

From that i see two problems.

1. the volume cannot be null, but it is. Does the lib assume it is not null while it it might be null form the api?
2. something is wrong handling the "MEDIA_STATUS" message leading to a 'UNKNOWN' event in the registered eventhandler. (lib consumer)

Retrieve mediastatus

For a project i'm experimenting with a replacement to and this fork seems to solve most issues we have. Most of the handling is similar, but the session MediaStatus is pretty different. I have this requirement to show the title in the media player (appId: CC1AD845).

Previously we called:
chromeCast.load(title, null, url, mimeType);
This has changed to

MediaBuilder builder = new MediaBuilder(url, mimeType, StreamType.NONE);
session.load(builder, true, 0.0, false);

But i don't see an obvious place/call to add this title so it get shown. Can someone help me out here?