Can't play any Live TV stream but recordings are playing fine

[WilcoVertegaal]

When opening a TV channel, I always get an error 500 - "Internal Server Error". Logfile always shows the same error: "Object reference not set to an instance of an object". For instance:

[2020-12-30 14:03:04.705 +01:00] [ERR] Error processing request. URL "POST" "/Items/afc050d9852b7308dce063fd3e0c3a16/PlaybackInfo".
System.NullReferenceException: Object reference not set to an instance of an object.
   at MediaBrowser.Model.Dlna.StreamBuilder.GetVideoDirectPlayProfile(VideoOptions options, MediaSourceInfo mediaSource, MediaStream videoStream, MediaStream audioStream, Boolean isEligibleForDirectPlay, Boolean isEligibleForDirectStream)
   at MediaBrowser.Model.Dlna.StreamBuilder.BuildVideoItem(MediaSourceInfo item, VideoOptions options)
   at MediaBrowser.Model.Dlna.StreamBuilder.BuildVideoItem(VideoOptions options)
   at Jellyfin.Api.Helpers.MediaInfoHelper.SetDeviceSpecificData(BaseItem item, MediaSourceInfo mediaSource, DeviceProfile profile, AuthorizationInfo auth, Nullable`1 maxBitrate, Int64 startTimeTicks, String mediaSourceId, Nullable`1 audioStreamIndex, Nullable`1 subtitleStreamIndex, Nullable`1 maxAudioChannels, String playSessionId, Guid userId, Boolean enableDirectPlay, Boolean enableDirectStream, Boolean enableTranscoding, Boolean allowVideoStreamCopy, Boolean allowAudioStreamCopy, String ipAddress)
   at Jellyfin.Api.Controllers.MediaInfoController.GetPostedPlaybackInfo(Guid itemId, Nullable`1 userId, Nullable`1 maxStreamingBitrate, Nullable`1 startTimeTicks, Nullable`1 audioStreamIndex, Nullable`1 subtitleStreamIndex, Nullable`1 maxAudioChannels, String mediaSourceId, String liveStreamId, Nullable`1 autoOpenLiveStream, Nullable`1 enableDirectPlay, Nullable`1 enableDirectStream, Nullable`1 enableTranscoding, Nullable`1 allowVideoStreamCopy, Nullable`1 allowAudioStreamCopy, PlaybackInfoDto playbackInfoDto)
   at lambda_method892(Closure , Object )
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Jellyfin.Server.Middleware.ServerStartupMessageMiddleware.Invoke(HttpContext httpContext, IServerApplicationHost serverApplicationHost, ILocalizationManager localizationManager)
   at Jellyfin.Server.Middleware.WebSocketHandlerMiddleware.Invoke(HttpContext httpContext, IWebSocketManager webSocketManager)
   at Jellyfin.Server.Middleware.IpBasedAccessValidationMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager)
   at Jellyfin.Server.Middleware.LanFilteringMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager)
   at Microsoft.AspNetCore.Authorization.Policy.AuthorizationMiddlewareResultHandler.HandleAsync(RequestDelegate next, HttpContext context, AuthorizationPolicy policy, PolicyAuthorizationResult authorizeResult)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Swashbuckle.AspNetCore.ReDoc.ReDocMiddleware.Invoke(HttpContext httpContext)
   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Jellyfin.Server.Middleware.RobotsRedirectionMiddleware.Invoke(HttpContext httpContext)
   at Jellyfin.Server.Middleware.LegacyEmbyRouteRewriteMiddleware.Invoke(HttpContext httpContext)
   at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.Invoke(HttpContext context)
   at Jellyfin.Server.Middleware.ResponseTimeMiddleware.Invoke(HttpContext context)
   at Jellyfin.Server.Middleware.ExceptionMiddleware.Invoke(HttpContext context)
[2020-12-30 14:03:18.128 +01:00] [INF] WS "192.168.0.24" closed

This happens with any browser as well as the Android app. Finished recordings play correctly though. It does not make any difference if I use a user/password to connect to TVHeadend or leave it empty (anonymous access has been configured correctly in TVHeadend). Playing Live TV through TVHeadend's web interface works flawlessly.

Using jellyfin-web 20201225.5-unstable and jellyfin-server 20201223.3-unstable on Ubuntu 20.04.1 with TVHeadend Jellyfin plugin 6.0.0.0 and TVHeadend 4.3-1896~gce0907705.

Any thoughts?

[crobibero]

My only guess is jellyfin/jellyfin#4861, which was merged after the server version you have listed.

I would test but I don't have a tvheadend.

--
Sorry wrong button as usual

[WilcoVertegaal]

I just tested with 10.7 RC2, it solves the issue! Great, thanks a lot.

Closed.

(Deleted some comments about not being able to run the latest version - caused by some remains of uninstalled IPTV plugin)