Help

[ODENc]

I get a "Playback Error" when i try to play a sertain show, Its a .mkv, i have other Files that also are .mkv that works great.
i am very new to all this so any help is very appriciated

[2025-10-18 11:12:38.925 +02:00] [ERR] FFmpeg exited with code 187
[2025-10-18 11:12:39.009 +02:00] [ERR] Error processing request. URL "GET" "/videos/a771a2e5-719b-0526-198f-626c5b9aa548/hls1/main/-1.mp4".
MediaBrowser.Common.FfmpegException: FFmpeg exited with code 187
  at MediaBrowser.MediaEncoding.Transcoding.TranscodeManager.StartFfMpeg(StreamState state, String outputPath, String commandLineArguments, Guid userId, TranscodingJobType transcodingJobType, CancellationTokenSource cancellationTokenSource, String workingDirectory)
  at Jellyfin.Api.Controllers.DynamicHlsController.GetDynamicSegment(StreamingRequestDto streamingRequest, Int32 segmentId)
  at Jellyfin.Api.Controllers.DynamicHlsController.GetHlsVideoSegment(Guid itemId, String playlistId, Int32 segmentId, String container, Int64 runtimeTicks, Int64 actualSegmentLengthTicks, Nullable1 static, String params, String tag, String deviceProfileId, String playSessionId, String segmentContainer, Nullable1 segmentLength, Nullable1 minSegments, String mediaSourceId, String deviceId, String audioCodec, Nullable1 enableAutoStreamCopy, Nullable1 allowVideoStreamCopy, Nullable1 allowAudioStreamCopy, Nullable1 breakOnNonKeyFrames, Nullable1 audioSampleRate, Nullable1 maxAudioBitDepth, Nullable1 audioBitRate, Nullable1 audioChannels, Nullable1 maxAudioChannels, String profile, String level, Nullable1 framerate, Nullable1 maxFramerate, Nullable1 copyTimestamps, Nullable1 startTimeTicks, Nullable1 width, Nullable1 height, Nullable1 maxWidth, Nullable1 maxHeight, Nullable1 videoBitRate, Nullable1 subtitleStreamIndex, Nullable1 subtitleMethod, Nullable1 maxRefFrames, Nullable1 maxVideoBitDepth, Nullable1 requireAvc, Nullable1 deInterlace, Nullable1 requireNonAnamorphic, Nullable1 transcodingMaxAudioChannels, Nullable1 cpuCoreLimit, String liveStreamId, Nullable1 enableMpegtsM2TsMode, String videoCodec, String subtitleCodec, String transcodeReasons, Nullable1 audioStreamIndex, Nullable1 videoStreamIndex, Nullable1 context, Dictionary2 streamOptions, Boolean enableAudioVbrEncoding, Boolean alwaysBurnInSubtitleWhenTranscoding)
  at lambda_method1224(Closure, Object)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfActionResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask1 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>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_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>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
  at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
  at Jellyfin.Api.Middleware.ServerStartupMessageMiddleware.Invoke(HttpContext httpContext, IServerApplicationHost serverApplicationHost, ILocalizationManager localizationManager)
  at Jellyfin.Api.Middleware.WebSocketHandlerMiddleware.Invoke(HttpContext httpContext, IWebSocketManager webSocketManager)
  at Jellyfin.Api.Middleware.IPBasedAccessValidationMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager)
  at Jellyfin.Api.Middleware.LanFilteringMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager)
  at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
  at Jellyfin.Api.Middleware.QueryStringDecodingMiddleware.Invoke(HttpContext httpContext)
  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.Api.Middleware.RobotsRedirectionMiddleware.Invoke(HttpContext httpContext)
  at Jellyfin.Api.Middleware.LegacyEmbyRouteRewriteMiddleware.Invoke(HttpContext httpContext)
  at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context)
  at Jellyfin.Api.Middleware.ResponseTimeMiddleware.Invoke(HttpContext context, IServerConfigurationManager serverConfigurationManager)
  at Jellyfin.Api.Middleware.ExceptionMiddleware.Invoke(HttpContext context)

[jimmyjammy]

The error "FFmpeg exited with code 187" typically indicates a problem during video transcoding, particularly when hardware acceleration is involved, such as with Jellyfin or similar media servers. This error code often points to issues related to low-power encoding or hardware encoding setup.
Here are potential causes and troubleshooting steps:

Low Power Encoding Setup:
The error can occur if low-power encoding, especially for specific codecs like H264, is not correctly configured or supported by your integrated GPU (iGPU).
Action: Ensure your system and software (e.g., Jellyfin) are properly configured for hardware acceleration and that the necessary drivers and libraries for your specific GPU are installed and up-to-date.
Hardware Acceleration Configuration:
Incorrect settings in your media server (like Jellyfin's Dashboard -> Playback -> Transcoding) can lead to this error. This includes enabling or disabling specific codecs (HEVC, AV1) for hardware encoding.
Action: Review and adjust your hardware acceleration settings in your media server. Experiment with enabling or disabling different codecs for hardware encoding to see if it resolves the issue.
Permissions and User Context:
When running media servers in containers (e.g., Docker), insufficient permissions for the user running the container to access the GPU can cause transcoding failures.
Action: Ensure the user account running the container has the necessary permissions to access the GPU devices (e.g., by adding the user to the render group and passing the correct device mappings to the container).
GPU Device Mapping (in containers):
In virtualized environments or containers, incorrect mapping of GPU devices can lead to FFmpeg failing to utilize the hardware.
Action: Verify that the correct GPU device (e.g., /dev/dri/renderD12 is mapped to the container and that it is not already in use by another container or VM if using specific device paths like /dev/dri/renderD133.
FFmpeg Logs:
The most effective way to diagnose the specific cause is to examine the full FFmpeg logs, which provide detailed information about the commands being executed and any errors encountered during the transcoding process.
Action: Locate and analyze the FFmpeg logs generated by your media server or application to pinpoint the exact point of failure and relevant error messages.

Try re-encoding the files to mp4 might be a simple solution