validate hardware accel, use hw accel for error messages (#1471)

* only display supported hw accels in ffmpeg profile editor

* qsv capability improvements

* qsv fixes

* update changelog

CHANGELOG.md

@@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Include `inputstream.ffmpegdirect` properties in channels.m3u when requested by Kodi
 - Log playout item title and path when starting a stream
   - This will help with media server libraries where the URL passed to ffmpeg doesn't indicate which file is streaming
+- Add QSV Capabilities to Troubleshooting page
 
 ### Fixed
 - Fix playout bug that caused some schedule items with fixed start times to be pushed to the next day
@@ -25,6 +26,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - Note that ffmpeg is still *always* required for playback to work
 - Fix PGS subtitle pixel format with Intel VAAPI
 - Fix some cases where `Copy` button would fail to copy to clipboard
+- Fix some cases where ffmpeg process would remain running after properly closing ErsatzTV
+- Fix QSV HLS segment duration
+  - This behavior caused extremely slow QSV stream starts
 
 ### Changed
 - Upgrade ffmpeg to 6.1, which is now *required* for all installs
@@ -36,6 +40,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Jellyfin collection scanning will no longer happen after every (automatic or forced) library scan
     - Automatic/periodic scans will check collections one time after all libraries have been scanned
     - There is a new table in the `Media` > `Libraries` page with a button to manually re-scan Jellyfin collections as needed
+- In FFmpeg Profile editor, only display hardware acceleration kinds that are supported by the configured ffmpeg
+- Test QSV acceleration if configured, and fallback to software mode if test fails
+- Detect QSV capabilities on Linux (supported decoders, encoders)
 
 ## [0.8.2-beta] - 2023-09-14
 ### Added

ErsatzTV.Application/ErsatzTV.Application.csproj

@@ -14,6 +14,7 @@
       <PackageReference Include="Humanizer.Core" Version="2.14.1" />
       <PackageReference Include="MediatR" Version="12.1.1" />
       <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="7.0.0" />
+      <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="7.0.0" />
       <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.7.30">
         <PrivateAssets>all</PrivateAssets>
         <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

ErsatzTV.Application/FFmpegProfiles/Queries/GetSupportedHardwareAccelerationKinds.cs

@@ -0,0 +1,5 @@
+using ErsatzTV.Core.Domain;
+
+namespace ErsatzTV.Application.FFmpegProfiles;
+
+public record GetSupportedHardwareAccelerationKinds : IRequest<List<HardwareAccelerationKind>>;

ErsatzTV.Application/FFmpegProfiles/Queries/GetSupportedHardwareAccelerationKindsHandler.cs

@@ -0,0 +1,79 @@
+using ErsatzTV.Core;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.FFmpeg;
+using ErsatzTV.FFmpeg.Capabilities;
+using ErsatzTV.Infrastructure.Data;
+using ErsatzTV.Infrastructure.Extensions;
+using Microsoft.EntityFrameworkCore;
+
+namespace ErsatzTV.Application.FFmpegProfiles;
+
+public class
+    GetSupportedHardwareAccelerationKindsHandler : IRequestHandler<GetSupportedHardwareAccelerationKinds,
+        List<HardwareAccelerationKind>>
+{
+    private readonly IDbContextFactory<TvContext> _dbContextFactory;
+    private readonly IHardwareCapabilitiesFactory _hardwareCapabilitiesFactory;
+
+    public GetSupportedHardwareAccelerationKindsHandler(
+        IDbContextFactory<TvContext> dbContextFactory,
+        IHardwareCapabilitiesFactory hardwareCapabilitiesFactory)
+    {
+        _dbContextFactory = dbContextFactory;
+        _hardwareCapabilitiesFactory = hardwareCapabilitiesFactory;
+    }
+    
+    public async Task<List<HardwareAccelerationKind>> Handle(
+        GetSupportedHardwareAccelerationKinds request,
+        CancellationToken cancellationToken)
+    {
+        await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
+        Validation<BaseError, string> validation = await Validate(dbContext);
+
+        return await validation.Match(
+            GetHardwareAccelerationKinds,
+            _ => Task.FromResult(new List<HardwareAccelerationKind> { HardwareAccelerationKind.None }));
+    }
+
+    private async Task<List<HardwareAccelerationKind>> GetHardwareAccelerationKinds(string ffmpegPath)
+    {
+        var result = new List<HardwareAccelerationKind> { HardwareAccelerationKind.None };
+
+        IFFmpegCapabilities ffmpegCapabilities = await _hardwareCapabilitiesFactory.GetFFmpegCapabilities(ffmpegPath);
+
+        if (ffmpegCapabilities.HasHardwareAcceleration(HardwareAccelerationMode.Nvenc))
+        {
+            result.Add(HardwareAccelerationKind.Nvenc);
+        }
+
+        if (ffmpegCapabilities.HasHardwareAcceleration(HardwareAccelerationMode.Qsv))
+        {
+            result.Add(HardwareAccelerationKind.Qsv);
+        }
+
+        if (ffmpegCapabilities.HasHardwareAcceleration(HardwareAccelerationMode.Vaapi))
+        {
+            result.Add(HardwareAccelerationKind.Vaapi);
+        }
+
+        if (ffmpegCapabilities.HasHardwareAcceleration(HardwareAccelerationMode.VideoToolbox))
+        {
+            result.Add(HardwareAccelerationKind.VideoToolbox);
+        }
+
+        if (ffmpegCapabilities.HasHardwareAcceleration(HardwareAccelerationMode.Amf))
+        {
+            result.Add(HardwareAccelerationKind.Amf);
+        }
+
+        return result;
+    }
+
+    private static async Task<Validation<BaseError, string>> Validate(TvContext dbContext) =>
+        await FFmpegPathMustExist(dbContext);
+
+    private static Task<Validation<BaseError, string>> FFmpegPathMustExist(TvContext dbContext) =>
+        dbContext.ConfigElements.GetValue<string>(ConfigElementKey.FFmpegPath)
+            .FilterT(File.Exists)
+            .Map(maybePath => maybePath.ToValidation<BaseError>("FFmpeg path does not exist on filesystem"));
+}

ErsatzTV.Application/Streaming/Commands/StartFFmpegSessionHandler.cs

@@ -11,6 +11,7 @@ using ErsatzTV.Core.Interfaces.FFmpeg;
 using ErsatzTV.Core.Interfaces.Metadata;
 using ErsatzTV.Core.Interfaces.Repositories;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 
 namespace ErsatzTV.Application.Streaming;
@@ -18,6 +19,7 @@ namespace ErsatzTV.Application.Streaming;
 public class StartFFmpegSessionHandler : IRequestHandler<StartFFmpegSession, Either<BaseError, Unit>>
 {
     private readonly IConfigElementRepository _configElementRepository;
+    private readonly IHostApplicationLifetime _hostApplicationLifetime;
     private readonly IFFmpegSegmenterService _ffmpegSegmenterService;
     private readonly IHlsPlaylistFilter _hlsPlaylistFilter;
     private readonly IServiceScopeFactory _serviceScopeFactory;
@@ -38,6 +40,7 @@ public class StartFFmpegSessionHandler : IRequestHandler<StartFFmpegSession, Eit
         ILogger<HlsSessionWorker> sessionWorkerLogger,
         IFFmpegSegmenterService ffmpegSegmenterService,
         IConfigElementRepository configElementRepository,
+        IHostApplicationLifetime hostApplicationLifetime, 
         ChannelWriter<IBackgroundServiceRequest> workerChannel)
     {
         _hlsPlaylistFilter = hlsPlaylistFilter;
@@ -49,6 +52,7 @@ public class StartFFmpegSessionHandler : IRequestHandler<StartFFmpegSession, Eit
         _sessionWorkerLogger = sessionWorkerLogger;
         _ffmpegSegmenterService = ffmpegSegmenterService;
         _configElementRepository = configElementRepository;
+        _hostApplicationLifetime = hostApplicationLifetime;
         _workerChannel = workerChannel;
     }
 
@@ -81,7 +85,7 @@ public class StartFFmpegSessionHandler : IRequestHandler<StartFFmpegSession, Eit
         _ffmpegSegmenterService.SessionWorkers.AddOrUpdate(request.ChannelNumber, _ => worker, (_, _) => worker);
 
         // fire and forget worker
-        _ = worker.Run(request.ChannelNumber, idleTimeout, cancellationToken)
+        _ = worker.Run(request.ChannelNumber, idleTimeout, _hostApplicationLifetime.ApplicationStopping)
             .ContinueWith(
                 _ =>
                 {

ErsatzTV.Application/Troubleshooting/Queries/GetTroubleshootingInfoHandler.cs

@@ -7,6 +7,7 @@ using ErsatzTV.Core.FFmpeg;
 using ErsatzTV.Core.Health;
 using ErsatzTV.Core.Interfaces.Repositories;
 using ErsatzTV.FFmpeg.Capabilities;
+using ErsatzTV.FFmpeg.Capabilities.Qsv;
 using ErsatzTV.FFmpeg.Runtime;
 using ErsatzTV.Infrastructure.Data;
 using Microsoft.EntityFrameworkCore;
@@ -74,6 +75,7 @@ public class GetTroubleshootingInfoHandler : IRequestHandler<GetTroubleshootingI
             .ToList();
 
         string nvidiaCapabilities = null;
+        string qsvCapabilities = null;
         string vaapiCapabilities = null;
         Option<ConfigElement> maybeFFmpegPath =
             await _configElementRepository.GetConfigElement(ConfigElementKey.FFmpegPath);
@@ -87,6 +89,20 @@ public class GetTroubleshootingInfoHandler : IRequestHandler<GetTroubleshootingI
             {
                 nvidiaCapabilities = await _hardwareCapabilitiesFactory.GetNvidiaOutput(ffmpegPath.Value);
 
+                if (!_memoryCache.TryGetValue("ffmpeg.render_devices", out List<string> vaapiDevices))
+                {
+                    vaapiDevices = new List<string> { "/dev/dri/renderD128" };
+                }
+
+                foreach (string qsvDevice in vaapiDevices)
+                {
+                    QsvOutput output = await _hardwareCapabilitiesFactory.GetQsvOutput(ffmpegPath.Value, qsvDevice);
+                    qsvCapabilities += $"Checking device {qsvDevice}{Environment.NewLine}";
+                    qsvCapabilities += $"Exit Code: {output.ExitCode}{Environment.NewLine}{Environment.NewLine}";
+                    qsvCapabilities += output.Output;
+                    qsvCapabilities += Environment.NewLine + Environment.NewLine;
+                }
+
                 if (_runtimeInfo.IsOSPlatform(OSPlatform.Linux))
                 {
                     var allDrivers = new List<VaapiDriver>
@@ -94,11 +110,6 @@ public class GetTroubleshootingInfoHandler : IRequestHandler<GetTroubleshootingI
 
                     foreach (VaapiDriver activeDriver in allDrivers)
                     {
-                        if (!_memoryCache.TryGetValue("ffmpeg.render_devices", out List<string> vaapiDevices))
-                        {
-                            vaapiDevices = new List<string> { "/dev/dri/renderD128" };
-                        }
-
                         foreach (string vaapiDevice in vaapiDevices)
                         {
                             foreach (string output in await _hardwareCapabilitiesFactory.GetVaapiOutput(
@@ -123,6 +134,7 @@ public class GetTroubleshootingInfoHandler : IRequestHandler<GetTroubleshootingI
             activeFFmpegProfiles,
             channels,
             nvidiaCapabilities,
+            qsvCapabilities,
             vaapiCapabilities);
     }
 

ErsatzTV.Application/Troubleshooting/TroubleshootingInfo.cs

@@ -10,4 +10,5 @@ public record TroubleshootingInfo(
     IEnumerable<FFmpegProfile> FFmpegProfiles,
     IEnumerable<Channel> Channels,
     string NvidiaCapabilities,
+    string QsvCapabilities,
     string VaapiCapabilities);

ErsatzTV.Core/FFmpeg/FFmpegLibraryProcessService.cs

@@ -480,11 +480,13 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
 
         var videoInputFile = new VideoInputFile(videoPath, new List<VideoStream> { ffmpegVideoStream });
 
+        // TODO: ignore accel if this already failed once
         HardwareAccelerationMode hwAccel = GetHardwareAccelerationMode(playbackSettings, FillerKind.None);
+        _logger.LogDebug("HW accel mode: {HwAccel}", hwAccel);
 
         var ffmpegState = new FFmpegState(
             false,
-            hwAccel,
+            HardwareAccelerationMode.None, // no hw accel decode since errors loop
             hwAccel,
             VaapiDriverName(hwAccel, vaapiDriver),
             VaapiDeviceName(hwAccel, vaapiDevice),

ErsatzTV.Core/FFmpeg/FFmpegPlaybackSettingsCalculator.cs

@@ -175,8 +175,7 @@ public static class FFmpegPlaybackSettingsCalculator
         bool hlsRealtime) =>
         new()
         {
-            // HardwareAcceleration = ffmpegProfile.HardwareAcceleration,
-            HardwareAcceleration = HardwareAccelerationKind.None,
+            HardwareAcceleration = ffmpegProfile.HardwareAcceleration,
             FormatFlags = CommonFormatFlags,
             VideoFormat = ffmpegProfile.VideoFormat,
             VideoBitrate = ffmpegProfile.VideoBitrate,

ErsatzTV.FFmpeg.Tests/PipelineBuilderBaseTests.cs

@@ -494,6 +494,7 @@ public class PipelineBuilderBaseTests
     {
         public DefaultFFmpegCapabilities()
             : base(
+                new System.Collections.Generic.HashSet<string>(),
                 new System.Collections.Generic.HashSet<string>(),
                 new System.Collections.Generic.HashSet<string>(),
                 new System.Collections.Generic.HashSet<string>())

ErsatzTV.FFmpeg/Capabilities/FFmpegCapabilities.cs

@@ -5,20 +5,38 @@ namespace ErsatzTV.FFmpeg.Capabilities;
 
 public class FFmpegCapabilities : IFFmpegCapabilities
 {
+    private readonly IReadOnlySet<string> _ffmpegHardwareAccelerations;
     private readonly IReadOnlySet<string> _ffmpegDecoders;
     private readonly IReadOnlySet<string> _ffmpegEncoders;
     private readonly IReadOnlySet<string> _ffmpegFilters;
 
     public FFmpegCapabilities(
+        IReadOnlySet<string> ffmpegHardwareAccelerations,
         IReadOnlySet<string> ffmpegDecoders,
         IReadOnlySet<string> ffmpegFilters,
         IReadOnlySet<string> ffmpegEncoders)
     {
+        _ffmpegHardwareAccelerations = ffmpegHardwareAccelerations;
         _ffmpegDecoders = ffmpegDecoders;
         _ffmpegFilters = ffmpegFilters;
         _ffmpegEncoders = ffmpegEncoders;
     }
 
+    public bool HasHardwareAcceleration(HardwareAccelerationMode hardwareAccelerationMode)
+    {
+        string accelToCheck = hardwareAccelerationMode switch
+        {
+            HardwareAccelerationMode.Amf => "amf",
+            HardwareAccelerationMode.Nvenc => "cuda",
+            HardwareAccelerationMode.Qsv => "qsv",
+            HardwareAccelerationMode.Vaapi => "vaapi",
+            HardwareAccelerationMode.VideoToolbox => "videotoolbox",
+            _ => string.Empty
+        };
+
+        return !string.IsNullOrWhiteSpace(accelToCheck) && _ffmpegHardwareAccelerations.Contains(accelToCheck);
+    }
+
     public bool HasDecoder(string decoder) => _ffmpegDecoders.Contains(decoder);
 
     public bool HasEncoder(string encoder) => _ffmpegEncoders.Contains(encoder);

ErsatzTV.FFmpeg/Capabilities/HardwareCapabilitiesFactory.cs

@@ -1,10 +1,14 @@
 using System.Collections.Immutable;
 using System.Globalization;
+using System.Runtime.InteropServices;
 using System.Text;
 using System.Text.RegularExpressions;
 using CliWrap;
 using CliWrap.Buffered;
+using ErsatzTV.FFmpeg.Capabilities.Qsv;
 using ErsatzTV.FFmpeg.Capabilities.Vaapi;
+using ErsatzTV.FFmpeg.GlobalOption.HardwareAcceleration;
+using ErsatzTV.FFmpeg.Runtime;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Logging;
 
@@ -15,24 +19,35 @@ public class HardwareCapabilitiesFactory : IHardwareCapabilitiesFactory
     private const string ArchitectureCacheKey = "ffmpeg.hardware.nvidia.architecture";
     private const string ModelCacheKey = "ffmpeg.hardware.nvidia.model";
     private const string VaapiCacheKeyFormat = "ffmpeg.hardware.vaapi.{0}.{1}";
+    private const string QsvCacheKeyFormat = "ffmpeg.hardware.qsv.{0}";
     private const string FFmpegCapabilitiesCacheKeyFormat = "ffmpeg.{0}";
     private readonly ILogger<HardwareCapabilitiesFactory> _logger;
 
     private readonly IMemoryCache _memoryCache;
+    private readonly IRuntimeInfo _runtimeInfo;
 
-    public HardwareCapabilitiesFactory(IMemoryCache memoryCache, ILogger<HardwareCapabilitiesFactory> logger)
+    public HardwareCapabilitiesFactory(
+        IMemoryCache memoryCache,
+        IRuntimeInfo runtimeInfo,
+        ILogger<HardwareCapabilitiesFactory> logger)
     {
         _memoryCache = memoryCache;
+        _runtimeInfo = runtimeInfo;
         _logger = logger;
     }
 
     public async Task<IFFmpegCapabilities> GetFFmpegCapabilities(string ffmpegPath)
     {
-        IReadOnlySet<string> ffmpegDecoders = await GetFFmpegCapabilities(ffmpegPath, "decoders");
-        IReadOnlySet<string> ffmpegFilters = await GetFFmpegCapabilities(ffmpegPath, "filters");
-        IReadOnlySet<string> ffmpegEncoders = await GetFFmpegCapabilities(ffmpegPath, "encoders");
+        // TODO: validate videotoolbox somehow
+        // TODO: validate amf somehow
 
-        return new FFmpegCapabilities(ffmpegDecoders, ffmpegFilters, ffmpegEncoders);
+        IReadOnlySet<string> ffmpegHardwareAccelerations =
+            await GetFFmpegCapabilities(ffmpegPath, "hwaccels", ParseFFmpegAccelLine);
+        IReadOnlySet<string> ffmpegDecoders = await GetFFmpegCapabilities(ffmpegPath, "decoders", ParseFFmpegLine);
+        IReadOnlySet<string> ffmpegFilters = await GetFFmpegCapabilities(ffmpegPath, "filters", ParseFFmpegLine);
+        IReadOnlySet<string> ffmpegEncoders = await GetFFmpegCapabilities(ffmpegPath, "encoders", ParseFFmpegLine);
+
+        return new FFmpegCapabilities(ffmpegHardwareAccelerations, ffmpegDecoders, ffmpegFilters, ffmpegEncoders);
     }
 
     public async Task<IHardwareCapabilities> GetHardwareCapabilities(
@@ -40,14 +55,31 @@ public class HardwareCapabilitiesFactory : IHardwareCapabilitiesFactory
         string ffmpegPath,
         HardwareAccelerationMode hardwareAccelerationMode,
         Option<string> vaapiDriver,
-        Option<string> vaapiDevice) =>
-        hardwareAccelerationMode switch
+        Option<string> vaapiDevice)
+    {
+        if (hardwareAccelerationMode is HardwareAccelerationMode.None)
+        {
+            return new NoHardwareCapabilities();
+        }
+        
+        if (!ffmpegCapabilities.HasHardwareAcceleration(hardwareAccelerationMode))
+        {
+            _logger.LogWarning(
+                "FFmpeg does not support {HardwareAcceleration} acceleration; will use software mode",
+                hardwareAccelerationMode);
+
+            return new NoHardwareCapabilities();
+        }
+        
+        return hardwareAccelerationMode switch
         {
             HardwareAccelerationMode.Nvenc => await GetNvidiaCapabilities(ffmpegPath, ffmpegCapabilities),
+            HardwareAccelerationMode.Qsv => await GetQsvCapabilities(ffmpegPath, vaapiDevice),
             HardwareAccelerationMode.Vaapi => await GetVaapiCapabilities(vaapiDriver, vaapiDevice),
             HardwareAccelerationMode.Amf => new AmfHardwareCapabilities(),
             _ => new DefaultHardwareCapabilities()
         };
+    }
 
     public async Task<string> GetNvidiaOutput(string ffmpegPath)
     {
@@ -72,6 +104,33 @@ public class HardwareCapabilitiesFactory : IHardwareCapabilitiesFactory
         return output;
     }
     
+    public async Task<QsvOutput> GetQsvOutput(string ffmpegPath, Option<string> qsvDevice)
+    {
+        var option = new QsvHardwareAccelerationOption(qsvDevice);
+        var arguments = option.GlobalOptions.ToList();
+
+        arguments.AddRange(
+            new[]
+            {
+                "-f", "lavfi",
+                "-i", "nullsrc",
+                "-t", "00:00:01",
+                "-c:v", "h264_qsv",
+                "-f", "null", "-"
+            });
+        
+        BufferedCommandResult result = await Cli.Wrap(ffmpegPath)
+            .WithArguments(arguments)
+            .WithValidation(CommandResultValidation.None)
+            .ExecuteBufferedAsync(Encoding.UTF8);
+
+        string output = string.IsNullOrWhiteSpace(result.StandardOutput)
+            ? result.StandardError
+            : result.StandardOutput;
+
+        return new QsvOutput(result.ExitCode, output);
+    }
+
     public async Task<Option<string>> GetVaapiOutput(Option<string> vaapiDriver, string vaapiDevice)
     {
         BufferedCommandResult whichResult = await Cli.Wrap("which")
@@ -99,13 +158,16 @@ public class HardwareCapabilitiesFactory : IHardwareCapabilitiesFactory
         return result.StandardOutput;
     }
 
-    private async Task<IReadOnlySet<string>> GetFFmpegCapabilities(string ffmpegPath, string capabilities)
+    private async Task<IReadOnlySet<string>> GetFFmpegCapabilities(
+        string ffmpegPath,
+        string capabilities,
+        Func<string, Option<string>> parseLine)
     {
         var cacheKey = string.Format(CultureInfo.InvariantCulture, FFmpegCapabilitiesCacheKeyFormat, capabilities);
-        if (_memoryCache.TryGetValue(cacheKey, out IReadOnlySet<string>? cachedDecoders) &&
-            cachedDecoders is not null)
+        if (_memoryCache.TryGetValue(cacheKey, out IReadOnlySet<string>? cachedCapabilities) &&
+            cachedCapabilities is not null)
         {
-            return cachedDecoders;
+            return cachedCapabilities;
         }
 
         string[] arguments = { "-hide_banner", $"-{capabilities}" };
@@ -120,10 +182,17 @@ public class HardwareCapabilitiesFactory : IHardwareCapabilitiesFactory
             : result.StandardOutput;
 
         return output.Split("\n").Map(s => s.Trim())
-            .Bind(l => ParseFFmpegLine(l))
+            .Bind(l => parseLine(l))
             .ToImmutableHashSet();
     }
 
+    private static Option<string> ParseFFmpegAccelLine(string input)
+    {
+        const string PATTERN = @"^([\w]+)$";
+        Match match = Regex.Match(input, PATTERN);
+        return match.Success ? match.Groups[1].Value : Option<string>.None;
+    }
+
     private static Option<string> ParseFFmpegLine(string input)
     {
         const string PATTERN = @"^\s*?[A-Z\.]+\s+(\w+).*";
@@ -195,6 +264,71 @@ public class HardwareCapabilitiesFactory : IHardwareCapabilitiesFactory
         return new NoHardwareCapabilities();
     }
 
+    private async Task<IHardwareCapabilities> GetQsvCapabilities(string ffmpegPath, Option<string> qsvDevice)
+    {
+        try
+        {
+            if (_runtimeInfo.IsOSPlatform(OSPlatform.Linux) && qsvDevice.IsNone)
+            {
+                // this shouldn't really happen
+                _logger.LogError("Cannot detect QSV capabilities without device {Device}", qsvDevice);
+                return new NoHardwareCapabilities();
+            }
+
+            string device = qsvDevice.IfNone(string.Empty);
+            var cacheKey = string.Format(CultureInfo.InvariantCulture, QsvCacheKeyFormat, device);
+
+            if (_memoryCache.TryGetValue(cacheKey, out List<VaapiProfileEntrypoint>? profileEntrypoints) &&
+                profileEntrypoints is not null)
+            {
+                return new VaapiHardwareCapabilities(profileEntrypoints, _logger);
+            }
+
+            QsvOutput output = await GetQsvOutput(ffmpegPath, qsvDevice);
+            if (output.ExitCode != 0)
+            {
+                _logger.LogWarning("QSV test failed; some hardware accelerated features will be unavailable");
+                return new NoHardwareCapabilities();
+            }
+
+            if (_runtimeInfo.IsOSPlatform(OSPlatform.Linux))
+            {
+                Option<string> vaapiOutput = await GetVaapiOutput(Option<string>.None, device);
+                if (vaapiOutput.IsNone)
+                {
+                    _logger.LogWarning("Unable to determine QSV capabilities; please install vainfo");
+                    return new DefaultHardwareCapabilities();
+                }
+
+                foreach (string o in vaapiOutput)
+                {
+                    profileEntrypoints = VaapiCapabilityParser.ParseFull(o);
+                }
+
+                if (profileEntrypoints?.Any() ?? false)
+                {
+                    _logger.LogInformation(
+                        "Detected {Count} VAAPI profile entrypoints for using QSV device {Device}",
+                        profileEntrypoints.Count,
+                        device);
+                    
+                    _memoryCache.Set(cacheKey, profileEntrypoints);
+                    return new VaapiHardwareCapabilities(profileEntrypoints, _logger);
+                }
+            }
+
+            // not sure how to check capabilities on windows
+            return new DefaultHardwareCapabilities();
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(
+                ex,
+                "Error detecting QSV capabilities; some hardware accelerated features will be unavailable");
+            return new NoHardwareCapabilities();
+        }
+    }
+
     private async Task<IHardwareCapabilities> GetNvidiaCapabilities(
         string ffmpegPath,
         IFFmpegCapabilities ffmpegCapabilities)

ErsatzTV.FFmpeg/Capabilities/IFFmpegCapabilities.cs

@@ -4,6 +4,7 @@ namespace ErsatzTV.FFmpeg.Capabilities;
 
 public interface IFFmpegCapabilities
 {
+    bool HasHardwareAcceleration(HardwareAccelerationMode hardwareAccelerationMode);
     bool HasDecoder(string decoder);
     bool HasEncoder(string encoder);
     bool HasFilter(string filter);

ErsatzTV.FFmpeg/Capabilities/IHardwareCapabilitiesFactory.cs

@@ -1,3 +1,5 @@
+using ErsatzTV.FFmpeg.Capabilities.Qsv;
+
 namespace ErsatzTV.FFmpeg.Capabilities;
 
 public interface IHardwareCapabilitiesFactory
@@ -13,5 +15,7 @@ public interface IHardwareCapabilitiesFactory
 
     Task<string> GetNvidiaOutput(string ffmpegPath);
 
+    Task<QsvOutput> GetQsvOutput(string ffmpegPath, Option<string> qsvDevice);
+
     Task<Option<string>> GetVaapiOutput(Option<string> vaapiDriver, string vaapiDevice);
 }

ErsatzTV.FFmpeg/Capabilities/Qsv/QsvOutput.cs

@@ -0,0 +1,3 @@
+namespace ErsatzTV.FFmpeg.Capabilities.Qsv;
+
+public record QsvOutput(int ExitCode, string Output);

ErsatzTV.FFmpeg/OutputFormat/OutputFormatHls.cs

@@ -7,18 +7,21 @@ public class OutputFormatHls : IPipelineStep
     private readonly FrameState _desiredState;
     private readonly Option<string> _mediaFrameRate;
     private readonly string _playlistPath;
+    private readonly bool _oneSecondGop;
     private readonly string _segmentTemplate;
 
     public OutputFormatHls(
         FrameState desiredState,
         Option<string> mediaFrameRate,
         string segmentTemplate,
-        string playlistPath)
+        string playlistPath,
+        bool oneSecondGop = false)
     {
         _desiredState = desiredState;
         _mediaFrameRate = mediaFrameRate;
         _segmentTemplate = segmentTemplate;
         _playlistPath = playlistPath;
+        _oneSecondGop = oneSecondGop;
     }
 
     public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
@@ -33,9 +36,11 @@ public class OutputFormatHls : IPipelineStep
             const int SEGMENT_SECONDS = 4;
             int frameRate = _desiredState.FrameRate.IfNone(GetFrameRateFromMedia);
 
+            int gop = _oneSecondGop ? frameRate : frameRate * SEGMENT_SECONDS;
+            
             return new List<string>
             {
-                "-g", $"{frameRate * SEGMENT_SECONDS}",
+                "-g", $"{gop}",
                 "-keyint_min", $"{frameRate * SEGMENT_SECONDS}",
                 "-force_key_frames", $"expr:gte(t,n_forced*{SEGMENT_SECONDS})",
                 "-f", "hls",

ErsatzTV.FFmpeg/Pipeline/PipelineBuilderBase.cs

@@ -274,7 +274,8 @@ public abstract class PipelineBuilderBase : IPipelineBuilder
                                 desiredState,
                                 videoStream.FrameRate,
                                 segmentTemplate,
-                                playlistPath));
+                                playlistPath,
+                                ffmpegState.EncoderHardwareAccelerationMode is HardwareAccelerationMode.Qsv));
                     }
                 }
 

ErsatzTV.FFmpeg/Pipeline/PipelineBuilderFactory.cs

@@ -65,7 +65,7 @@ public class PipelineBuilderFactory : IPipelineBuilderFactory
                 reportsFolder,
                 fontsFolder,
                 _logger),
-            HardwareAccelerationMode.Qsv => new QsvPipelineBuilder(
+            HardwareAccelerationMode.Qsv when capabilities is not NoHardwareCapabilities => new QsvPipelineBuilder(
                 ffmpegCapabilities,
                 capabilities,
                 hardwareAccelerationMode,
@@ -76,7 +76,7 @@ public class PipelineBuilderFactory : IPipelineBuilderFactory
                 reportsFolder,
                 fontsFolder,
                 _logger),
-            HardwareAccelerationMode.VideoToolbox => new VideoToolboxPipelineBuilder(
+            HardwareAccelerationMode.VideoToolbox when capabilities is not NoHardwareCapabilities => new VideoToolboxPipelineBuilder(
                 ffmpegCapabilities,
                 capabilities,
                 hardwareAccelerationMode,
@@ -87,7 +87,7 @@ public class PipelineBuilderFactory : IPipelineBuilderFactory
                 reportsFolder,
                 fontsFolder,
                 _logger),
-            HardwareAccelerationMode.Amf => new AmfPipelineBuilder(
+            HardwareAccelerationMode.Amf when capabilities is not NoHardwareCapabilities => new AmfPipelineBuilder(
                 ffmpegCapabilities,
                 capabilities,
                 hardwareAccelerationMode,

ErsatzTV.Scanner.Tests/Core/FFmpeg/TranscodingTests.cs

@@ -245,6 +245,7 @@ public class TranscodingTests
                 //new FakeNvidiaCapabilitiesFactory(),
                 new HardwareCapabilitiesFactory(
                     MemoryCache,
+                    new RuntimeInfo(),
                     LoggerFactory.CreateLogger<HardwareCapabilitiesFactory>()),
                 LoggerFactory.CreateLogger<PipelineBuilderFactory>()),
             Substitute.For<IConfigElementRepository>(),
@@ -861,6 +862,7 @@ public class TranscodingTests
                 //new FakeNvidiaCapabilitiesFactory(),
                 new HardwareCapabilitiesFactory(
                     MemoryCache,
+                    new RuntimeInfo(),
                     LoggerFactory.CreateLogger<HardwareCapabilitiesFactory>()),
                 LoggerFactory.CreateLogger<PipelineBuilderFactory>()),
             Substitute.For<IConfigElementRepository>(),

ErsatzTV/Pages/FFmpegEditor.razor

@@ -69,7 +69,7 @@
                                     </MudElement>
                                     <MudElement HtmlTag="div" Class="mt-3">
                                         <MudSelect Label="Hardware Acceleration" @bind-Value="_model.HardwareAcceleration" For="@(() => _model.HardwareAcceleration)">
-                                            @foreach (HardwareAccelerationKind hwAccel in Enum.GetValues<HardwareAccelerationKind>())
+                                            @foreach (HardwareAccelerationKind hwAccel in _hardwareAccelerationKinds)
                                             {
                                                 <MudSelectItem Value="@hwAccel">@hwAccel</MudSelectItem>
                                             }
@@ -88,7 +88,7 @@
                                                 </MudSelect>
                                             </MudElement>
                                         }
-                                        @if (_model.HardwareAcceleration == HardwareAccelerationKind.Vaapi || _model.HardwareAcceleration == HardwareAccelerationKind.Qsv)
+                                        @if (_model.HardwareAcceleration is HardwareAccelerationKind.Vaapi or HardwareAccelerationKind.Qsv)
                                         {
                                             <MudElement HtmlTag="div" Class="mt-3">
                                                 <MudSelect Disabled="@(_model.HardwareAcceleration != HardwareAccelerationKind.Vaapi && _model.HardwareAcceleration != HardwareAccelerationKind.Qsv)"
@@ -167,6 +167,7 @@
     private ValidationMessageStore _messageStore;
 
     private List<ResolutionViewModel> _resolutions = new();
+    private List<HardwareAccelerationKind> _hardwareAccelerationKinds = new();
     private List<string> _vaapiDevices = new();
     private PersistingComponentStateSubscription _persistingSubscription;
 
@@ -196,6 +197,15 @@
             _resolutions = restoredResolutions;
         }
         
+        if (!ApplicationState.TryTakeFromJson("_hardwareAccelerationKinds", out List<HardwareAccelerationKind> restoredHardwareAccelerationKinds))
+        {
+            _hardwareAccelerationKinds = await _mediator.Send(new GetSupportedHardwareAccelerationKinds(), _cts.Token);
+        }
+        else
+        {
+            _hardwareAccelerationKinds = restoredHardwareAccelerationKinds;
+        }
+
         if (IsEdit)
         {
             if (!ApplicationState.TryTakeFromJson("_model", out FFmpegProfileEditViewModel restoredProfile))
@@ -221,6 +231,11 @@
             _model = new FFmpegProfileEditViewModel(await _mediator.Send(new NewFFmpegProfile(), _cts.Token));
         }
 
+        if (!_hardwareAccelerationKinds.Contains(_model.HardwareAcceleration))
+        {
+            _model.HardwareAcceleration = HardwareAccelerationKind.None;
+        }
+
         _editContext = new EditContext(_model);
         _messageStore = new ValidationMessageStore(_editContext);
 
@@ -236,6 +251,7 @@
     {
         ApplicationState.PersistAsJson("_model", _model);
         ApplicationState.PersistAsJson("_resolutions", _resolutions);
+        ApplicationState.PersistAsJson("_hardwareAccelerationKinds", _hardwareAccelerationKinds);
 
         return Task.CompletedTask;
     }

ErsatzTV/Pages/Troubleshooting.razor

@@ -29,6 +29,16 @@
                 Copy
             </MudButton>
         </MudExpansionPanel>
+        <MudExpansionPanel Text="QSV Capabilities" Class="mb-6">
+            <div class="overflow-y-scroll" style="max-height: 500px">
+                <pre>
+                    <code @ref="_qsvView">@_qsvCapabilities</code>
+                </pre>
+            </div>
+            <MudButton Variant="Variant.Filled" Color="Color.Primary" Class="mt-4" OnClick="() => CopyToClipboard(_qsvView)">
+                Copy
+            </MudButton>
+        </MudExpansionPanel>
         <MudExpansionPanel Text="VAAPI Capabilities">
             <div class="overflow-y-scroll" style="max-height: 500px">
                 <pre>
@@ -46,9 +56,11 @@
     private readonly CancellationTokenSource _cts = new();
     private string _troubleshootingInfo;
     private string _nvidiaCapabilities;
+    private string _qsvCapabilities;
     private string _vaapiCapabilities;
     private ElementReference _troubleshootingView;
     private ElementReference _nvidiaView;
+    private ElementReference _qsvView;
     private ElementReference _vaapiView;
 
     public void Dispose()
@@ -73,6 +85,7 @@
                 });
 
             _nvidiaCapabilities = info.NvidiaCapabilities;
+            _qsvCapabilities = info.QsvCapabilities;
             _vaapiCapabilities = info.VaapiCapabilities;
         }
         catch (Exception ex)