Hey u/Unkn0wnWitcher,
I am unsure if you would know too much about this but I seem to be having an issue with files that have gone through this process when attempting to play on jellyfin. I see the following error and not sure what to do. When I overwrite the file with the before converted version it does not appear so seems to be something with this or how jellyfin is seeing the file after the chapters are created.
[2022-10-22 02:32:03.737 -04:00] [ERR] [55] MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor: ffmpeg attachment extraction failed for "file:\"/mnt/plex/anime/Subbed only/Shinobi no Ittoki (2022)/Season 1/S01E003 - Quirks of Fate(Subbed).mkv\"" to "/config/data/data/attachments/b/bf71565d-5753-e6d9-44b9-1fdc3307310c" [2022-10-22 02:32:03.738 -04:00] [ERR] [55] Jellyfin.Server.Middleware.ExceptionMiddleware: Error processing request. URL "GET" "/Videos/83611ded-c61c-1d9e-726b-d0ee92f3291e/83611dedc61c1d9e726bd0ee92f3291e/Attachments/4". System.InvalidOperationException: ffmpeg attachment extraction failed for file:"/mnt/plex/anime/Subbed only/Shinobi no Ittoki (2022)/Season 1/S01E003 - Quirks of Fate(Subbed).mkv" to /config/data/data/attachments/b/bf71565d-5753-e6d9-44b9-1fdc3307310c at MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor.ExtractAttachmentInternal(String inputPath, Int32 attachmentStreamIndex, String outputPath, CancellationToken cancellationToken) at MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor.ExtractAttachment(String inputFile, MediaSourceInfo mediaSource, Int32 attachmentStreamIndex, String outputPath, CancellationToken cancellationToken) at MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor.GetReadableFile(String mediaPath, String inputFile, MediaSourceInfo mediaSource, MediaAttachment mediaAttachment, CancellationToken cancellationToken) at MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor.GetAttachmentStream(MediaSourceInfo mediaSource, MediaAttachment mediaAttachment, CancellationToken cancellationToken) at MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor.GetAttachment(BaseItem item, String mediaSourceId, Int32 attachmentStreamIndex, CancellationToken cancellationToken) at Jellyfin.Api.Controllers.VideoAttachmentsController.GetAttachment(Guid videoId, String mediaSourceId, Int32 index) at lambdamethod1383(Closure , Object ) at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>gAwaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>gAwaited|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>gAwaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>gAwaited|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>gAwaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>gAwaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>gAwaited|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) at Jellyfin.Server.Middleware.LanFilteringMiddleware.Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager) at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) at Jellyfin.Server.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.Server.Middleware.RobotsRedirectionMiddleware.Invoke(HttpContext httpContext) at Jellyfin.Server.Middleware.LegacyEmbyRouteRewriteMiddleware.Invoke(HttpContext httpContext) at Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context) at Jellyfin.Server.Middleware.ResponseTimeMiddleware.Invoke(HttpContext context, IServerConfigurationManager serverConfigurationManager) at Jellyfin.Server.Middleware.ExceptionMiddleware.Invoke(HttpContext context) [2022-10-22 02:32:04.023 -04:00] [INF] [56] Jellyfin.Api.Helpers.TranscodingJobHelper: FFmpeg exited with code 0 [2022-10-22 02:32:04.023 -04:00] [INF] [56] Jellyfin.Api.Helpers.TranscodingJobHelper: Deleting partial stream file(s) "/transcode/8bf535328de066eba2ea0107c2c4f829.m3u8" [2022-10-22 02:32:05.524 -04:00] [INF] [56] Emby.Server.Implementations.Session.SessionManager: Playback stopped reported by app "Jellyfin Web" "10.8.5" playing "Quirks of Fate". Stopped at "388065" ms