use vaapi driver settings with new transcoder logic (#635)

* add LIBVA_DRIVER_NAME env var

* add vaapi device name

* add FFREPORT env var

* fixes

ErsatzTV.Core/FFmpeg/FFmpegLibraryProcessService.cs

@@ -2,12 +2,14 @@
 using System.Diagnostics;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using ErsatzTV.Core.Domain;
 using ErsatzTV.Core.Domain.Filler;
 using ErsatzTV.Core.Interfaces.FFmpeg;
 using ErsatzTV.FFmpeg;
+using ErsatzTV.FFmpeg.Environment;
 using ErsatzTV.FFmpeg.Format;
 using ErsatzTV.FFmpeg.OutputFormat;
 using LanguageExt;
@@ -122,7 +124,10 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
             : Option<string>.None;
 
         var desiredState = new FrameState(
+            saveReports,
             hwAccel,
+            VaapiDriverName(hwAccel, vaapiDriver),
+            VaapiDeviceName(hwAccel, vaapiDevice),
             playbackSettings.RealtimeOutput,
             false,
             playbackSettings.StreamSeek,
@@ -170,7 +175,7 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
     public Process ConcatChannel(string ffmpegPath, bool saveReports, Channel channel, string scheme, string host)
     {
         var resolution = new FrameSize(channel.FFmpegProfile.Resolution.Width, channel.FFmpegProfile.Resolution.Height);
-        var desiredState = FrameState.Concat(channel.Name, resolution);
+        var desiredState = FrameState.Concat(saveReports, channel.Name, resolution);
 
         var inputFiles = new List<InputFile>
         {
@@ -218,12 +223,13 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
 
     private Process GetProcess(string ffmpegPath, IList<InputFile> inputFiles, FrameState desiredState)
     {
-        var pipelineBuilder = new PipelineBuilder(inputFiles, _logger);
+        var pipelineBuilder = new PipelineBuilder(inputFiles, FileSystemLayout.FFmpegReportsFolder, _logger);
 
         IList<IPipelineStep> pipelineSteps = pipelineBuilder.Build(desiredState);
 
-        _logger.LogDebug("FFmpeg pipeline {PipelineSteps}", pipelineSteps);
+        _logger.LogDebug("FFmpeg pipeline {PipelineSteps}", pipelineSteps.Map(ps => ps.GetType().Name));
 
+        IList<EnvironmentVariable> environmentVariables = CommandGenerator.GenerateEnvironmentVariables(pipelineSteps);
         IList<string> arguments = CommandGenerator.GenerateArguments(inputFiles, pipelineSteps);
 
         var startInfo = new ProcessStartInfo
@@ -236,6 +242,16 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
             StandardOutputEncoding = Encoding.UTF8
         };
 
+        if (environmentVariables.Any())
+        {
+            _logger.LogDebug("FFmpeg environment variables {EnvVars}", environmentVariables);
+        }
+
+        foreach ((string key, string value) in environmentVariables)
+        {
+            startInfo.EnvironmentVariables[key] = value;
+        }
+
         foreach (string argument in arguments)
         {
             startInfo.ArgumentList.Add(argument);
@@ -246,4 +262,27 @@ public class FFmpegLibraryProcessService : IFFmpegProcessService
             StartInfo = startInfo
         };
     }
+
+    private static Option<string> VaapiDriverName(HardwareAccelerationMode accelerationMode, VaapiDriver driver)
+    {
+        if (accelerationMode == HardwareAccelerationMode.Vaapi)
+        {
+            switch (driver)
+            {
+                case VaapiDriver.i965:
+                    return "i965";
+                case VaapiDriver.iHD:
+                    return "iHD";
+                case VaapiDriver.RadeonSI:
+                    return "radeonsi";
+            }
+        }
+        
+        return Option<string>.None;
+    }
+
+    private static Option<string> VaapiDeviceName(HardwareAccelerationMode accelerationMode, string vaapiDevice)
+    {
+        return accelerationMode == HardwareAccelerationMode.Vaapi ? vaapiDevice : Option<string>.None;
+    }
 }

ErsatzTV.FFmpeg.Tests/PipelineBuilderTests.cs

@@ -30,7 +30,10 @@ public class PipelineGeneratorTests
         var inputFiles = new List<InputFile> { testFile };
 
         var desiredState = new FrameState(
+            false,
             HardwareAccelerationMode.None,
+            Option<string>.None,
+            Option<string>.None,
             true,
             false,
             Option<TimeSpan>.None,
@@ -60,7 +63,7 @@ public class PipelineGeneratorTests
             Option<string>.None,
             0);
 
-        var builder = new PipelineBuilder(inputFiles, _logger);
+        var builder = new PipelineBuilder(inputFiles, "", _logger);
         IList<IPipelineStep> result = builder.Build(desiredState);
 
         result.Should().HaveCountGreaterThan(0);
@@ -83,7 +86,10 @@ public class PipelineGeneratorTests
         var inputFiles = new List<InputFile> { testFile };
 
         var desiredState = new FrameState(
+            false,
             HardwareAccelerationMode.None,
+            Option<string>.None,
+            Option<string>.None,
             true,
             false,
             Option<TimeSpan>.None,
@@ -113,7 +119,7 @@ public class PipelineGeneratorTests
             Option<string>.None,
             0);
 
-        var builder = new PipelineBuilder(inputFiles, _logger);
+        var builder = new PipelineBuilder(inputFiles, "", _logger);
         IList<IPipelineStep> result = builder.Build(desiredState);
 
         result.Should().HaveCountGreaterThan(0);
@@ -125,14 +131,14 @@ public class PipelineGeneratorTests
     public void Concat_Test()
     {
         var resolution = new FrameSize(1920, 1080);
-        var desiredState = FrameState.Concat("Some Channel", resolution);
+        var desiredState = FrameState.Concat(false, "Some Channel", resolution);
 
         var inputFiles = new List<InputFile>
         {
             new ConcatInputFile("http://localhost:8080/ffmpeg/concat/1", resolution)
         };
 
-        var builder = new PipelineBuilder(inputFiles, _logger);
+        var builder = new PipelineBuilder(inputFiles, "", _logger);
         IList<IPipelineStep> result = builder.Build(desiredState);
 
         result.Should().HaveCountGreaterThan(0);

ErsatzTV.FFmpeg/CommandGenerator.cs

@@ -1,7 +1,14 @@
-namespace ErsatzTV.FFmpeg;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg;
 
 public static class CommandGenerator
 {
+    public static IList<EnvironmentVariable> GenerateEnvironmentVariables(IEnumerable<IPipelineStep> pipelineSteps)
+    {
+        return pipelineSteps.SelectMany(ps => ps.EnvironmentVariables).ToList();
+    }
+
     public static IList<string> GenerateArguments(
         IEnumerable<InputFile> inputFiles,
         IList<IPipelineStep> pipelineSteps)

ErsatzTV.FFmpeg/Decoder/Cuvid/DecoderH264Cuvid.cs

@@ -30,7 +30,7 @@ public class DecoderH264Cuvid : DecoderBase
         }
     }
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
     
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/Cuvid/DecoderHevcCuvid.cs

@@ -28,7 +28,8 @@ public class DecoderHevcCuvid : DecoderBase
             return result;
         }
     }
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
     
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/Cuvid/DecoderMpeg2Cuvid.cs

@@ -35,8 +35,8 @@ public class DecoderMpeg2Cuvid : DecoderBase
             return result;
         }
     }
-    
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
 
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/Cuvid/DecoderMpeg4Cuvid.cs

@@ -30,7 +30,7 @@ public class DecoderMpeg4Cuvid : DecoderBase
         }
     }
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
     
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/Cuvid/DecoderVc1Cuvid.cs

@@ -28,7 +28,8 @@ public class DecoderVc1Cuvid : DecoderBase
             return result;
         }
     }
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
         
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/Cuvid/DecoderVp9Cuvid.cs

@@ -28,7 +28,8 @@ public class DecoderVp9Cuvid : DecoderBase
             return result;
         }
     }
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
         
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/DecoderBase.cs

@@ -1,8 +1,11 @@
-namespace ErsatzTV.FFmpeg.Decoder;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Decoder;
 
 public abstract class DecoderBase : IDecoder
 {
-    public abstract FrameDataLocation OutputFrameDataLocation { get; }
+    protected abstract FrameDataLocation OutputFrameDataLocation { get; }
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public virtual IList<string> InputOptions => new List<string> { "-c:v", Name };
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Decoder/DecoderH264.cs

@@ -3,5 +3,5 @@
 public class DecoderH264 : DecoderBase
 {
     public override string Name => "h264";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderHevc.cs

@@ -3,5 +3,5 @@
 public class DecoderHevc : DecoderBase
 {
     public override string Name => "hevc";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderImplicit.cs

@@ -2,7 +2,7 @@
 
 public class DecoderImplicit : DecoderBase
 {
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
     public override string Name => string.Empty;
     public override IList<string> InputOptions => Array.Empty<string>();
 }

ErsatzTV.FFmpeg/Decoder/DecoderMpeg1.cs

@@ -3,5 +3,5 @@
 public class DecoderMpeg1Video : DecoderBase
 {
     public override string Name => "mpeg1video";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderMpeg2.cs

@@ -3,5 +3,5 @@
 public class DecoderMpeg2Video : DecoderBase
 {
     public override string Name => "mpeg2video";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderMpeg4.cs

@@ -3,5 +3,5 @@
 public class DecoderMpeg4 : DecoderBase
 {
     public override string Name => "mpeg4";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderMsMpeg4v2.cs

@@ -3,5 +3,5 @@
 public class DecoderMsMpeg4V2 : DecoderBase
 {
     public override string Name => "msmpeg4v2";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderMsMpeg4v3.cs

@@ -3,5 +3,5 @@
 public class DecoderMsMpeg4V3 : DecoderBase
 {
     public override string Name => "msmpeg4v3";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderVaapi.cs

@@ -4,7 +4,7 @@ namespace ErsatzTV.FFmpeg.Decoder;
 
 public class DecoderVaapi : DecoderBase
 {
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
     public override string Name => "implicit_vaapi";
     public override IList<string> InputOptions => Array.Empty<string>();
 

ErsatzTV.FFmpeg/Decoder/DecoderVc1.cs

@@ -3,5 +3,5 @@
 public class DecoderVc1 : DecoderBase
 {
     public override string Name => "vc1";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/DecoderVp9.cs

@@ -3,5 +3,5 @@
 public class DecoderVp9 : DecoderBase
 {
     public override string Name => "vp9";
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
 }

ErsatzTV.FFmpeg/Decoder/Qsv/DecoderH264Qsv.cs

@@ -6,7 +6,7 @@ public class DecoderH264Qsv : DecoderBase
 {
     public override string Name => "h264_qsv";
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
 
     public override FrameState NextState(FrameState currentState)
     {

ErsatzTV.FFmpeg/Decoder/Qsv/DecoderHevcQsv.cs

@@ -4,5 +4,5 @@ public class DecoderHevcQsv : DecoderBase
 {
     public override string Name => "hevc_qsv";
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
 }

ErsatzTV.FFmpeg/Decoder/Qsv/DecoderMpeg2Qsv.cs

@@ -4,5 +4,5 @@ public class DecoderMpeg2Qsv : DecoderBase
 {
     public override string Name => "mpeg2_qsv";
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
 }

ErsatzTV.FFmpeg/Decoder/Qsv/DecoderVc1Qsv.cs

@@ -4,5 +4,5 @@ public class DecoderVc1Qsv : DecoderBase
 {
     public override string Name => "vc1_qsv";
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
 }

ErsatzTV.FFmpeg/Decoder/Qsv/DecoderVp9Qsv.cs

@@ -4,5 +4,5 @@ public class DecoderVp9Qsv : DecoderBase
 {
     public override string Name => "vp9_qsv";
 
-    public override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
+    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Hardware;
 }

ErsatzTV.FFmpeg/Encoder/EncoderBase.cs

@@ -1,7 +1,10 @@
-namespace ErsatzTV.FFmpeg.Encoder;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Encoder;
 
 public abstract class EncoderBase : IEncoder
 {
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Environment/EnvironmentVariable.cs

@@ -0,0 +1,3 @@
+namespace ErsatzTV.FFmpeg.Environment;
+
+public record EnvironmentVariable(string Key, string Value);

ErsatzTV.FFmpeg/Environment/FFReportVariable.cs

@@ -0,0 +1,46 @@
+using System.Runtime.InteropServices;
+
+namespace ErsatzTV.FFmpeg.Environment;
+
+public class FFReportVariable : IPipelineStep
+{
+    private readonly string _reportsFolder;
+    private readonly IList<InputFile> _inputFiles;
+
+    public FFReportVariable(string reportsFolder, IList<InputFile> inputFiles)
+    {
+        _reportsFolder = reportsFolder;
+        _inputFiles = inputFiles;
+    }
+
+    public IList<EnvironmentVariable> EnvironmentVariables
+    {
+        get
+        {
+            string fileName = _inputFiles.OfType<ConcatInputFile>().Any()
+                ? Path.Combine(_reportsFolder, "ffmpeg-%t-concat.log")
+                : Path.Combine(_reportsFolder, "ffmpeg-%t-transcode.log");
+
+            // rework filename in a format that works on windows
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                // \ is escape, so use / for directory separators
+                fileName = fileName.Replace(@"\", @"/");
+                    
+                // colon after drive letter needs to be escaped
+                fileName = fileName.Replace(@":/", @"\:/");
+            }
+
+            return new List<EnvironmentVariable>
+            {
+                new("FFREPORT", $"file={fileName}:level=32")
+            };
+        }
+    }
+
+    public IList<string> GlobalOptions => Array.Empty<string>();
+    public IList<string> InputOptions => Array.Empty<string>();
+    public IList<string> FilterOptions => Array.Empty<string>();
+    public IList<string> OutputOptions => Array.Empty<string>();
+    public FrameState NextState(FrameState currentState) => currentState with { SaveReport = true };
+}

ErsatzTV.FFmpeg/Environment/LibvaDriverNameVariable.cs

@@ -0,0 +1,22 @@
+namespace ErsatzTV.FFmpeg.Environment;
+
+public class LibvaDriverNameVariable : IPipelineStep
+{
+    private readonly string _driverName;
+
+    public LibvaDriverNameVariable(string driverName)
+    {
+        _driverName = driverName;
+    }
+
+    public IList<EnvironmentVariable> EnvironmentVariables => new List<EnvironmentVariable>
+    {
+        new("LIBVA_DRIVER_NAME", _driverName)
+    };
+
+    public IList<string> GlobalOptions => Array.Empty<string>();
+    public IList<string> InputOptions => Array.Empty<string>();
+    public IList<string> FilterOptions => Array.Empty<string>();
+    public IList<string> OutputOptions => Array.Empty<string>();
+    public FrameState NextState(FrameState currentState) => currentState with { VaapiDriver = _driverName };
+}

ErsatzTV.FFmpeg/Filter/BaseFilter.cs

@@ -1,7 +1,10 @@
-namespace ErsatzTV.FFmpeg.Filter;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Filter;
 
 public abstract class BaseFilter : IPipelineFilterStep
 {
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public virtual IList<string> GlobalOptions => Array.Empty<string>();
     public virtual IList<string> InputOptions => Array.Empty<string>();
     public virtual IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Filter/ComplexFilter.cs

@@ -1,4 +1,6 @@
-namespace ErsatzTV.FFmpeg.Filter;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Filter;
 
 public class ComplexFilter : IPipelineStep
 {
@@ -73,6 +75,7 @@ public class ComplexFilter : IPipelineStep
         return result;
     }
 
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Arguments();

ErsatzTV.FFmpeg/Format/ConcatInputFormat.cs

@@ -1,7 +1,10 @@
-namespace ErsatzTV.FFmpeg.Format;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Format;
 
 public class ConcatInputFormat : IPipelineStep
 {
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
 
     public IList<string> InputOptions => new List<string>

ErsatzTV.FFmpeg/FrameState.cs

@@ -5,7 +5,10 @@ using LanguageExt;
 namespace ErsatzTV.FFmpeg;
 
 public record FrameState(
+    bool SaveReport,
     HardwareAccelerationMode HardwareAccelerationMode,
+    Option<string> VaapiDriver,
+    Option<string> VaapiDevice,
     bool Realtime,
     bool InfiniteLoop,
     Option<TimeSpan> Start,
@@ -36,9 +39,12 @@ public record FrameState(
     long PtsOffset,
     FrameDataLocation FrameDataLocation = FrameDataLocation.Unknown)
 {
-    public static FrameState Concat(string channelName, FrameSize resolution) =>
+    public static FrameState Concat(bool saveReport, string channelName, FrameSize resolution) =>
         new(
+            saveReport,
             HardwareAccelerationMode.None,
+            Option<string>.None,
+            Option<string>.None,
             true, // realtime
             true, // infinite loop
             Option<TimeSpan>.None,

ErsatzTV.FFmpeg/IPipelineStep.cs

@@ -1,7 +1,10 @@
-namespace ErsatzTV.FFmpeg;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg;
 
 public interface IPipelineStep
 {
+    IList<EnvironmentVariable> EnvironmentVariables { get; }
     IList<string> GlobalOptions { get; }
     IList<string> InputOptions { get; }
     IList<string> FilterOptions { get; }

ErsatzTV.FFmpeg/Option/FrameRateOutputOption.cs

@@ -1,4 +1,6 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public class FrameRateOutputOption : IPipelineStep
 {
@@ -9,7 +11,7 @@ public class FrameRateOutputOption : IPipelineStep
         _frameRate = frameRate;
     }
 
-    public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Unknown;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Option/GlobalOption.cs

@@ -1,8 +1,10 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public abstract class GlobalOption : IPipelineStep
 {
-    public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Unknown;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public abstract IList<string> GlobalOptions { get; }
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Option/HardwareAcceleration/AvailableHardwareAccelerationOptions.cs

@@ -1,16 +1,37 @@
-namespace ErsatzTV.FFmpeg.Option.HardwareAcceleration;
+using LanguageExt;
+using Microsoft.Extensions.Logging;
+
+namespace ErsatzTV.FFmpeg.Option.HardwareAcceleration;
 
 public static class AvailableHardwareAccelerationOptions
 {
-    public static IPipelineStep ForMode(HardwareAccelerationMode mode)
-    {
-        return mode switch
+    public static Option<IPipelineStep> ForMode(
+        HardwareAccelerationMode mode,
+        Option<string> vaapiDevice,
+        ILogger logger) =>
+        mode switch
         {
             HardwareAccelerationMode.Nvenc => new CudaHardwareAccelerationOption(),
             HardwareAccelerationMode.Qsv => new QsvHardwareAccelerationOption(),
-            HardwareAccelerationMode.Vaapi => new VaapiHardwareAccelerationOption(),
+            HardwareAccelerationMode.Vaapi => GetVaapiAcceleration(vaapiDevice, logger),
             HardwareAccelerationMode.VideoToolbox => new VideoToolboxHardwareAccelerationOption(),
-            _ => throw new ArgumentOutOfRangeException(nameof(mode), mode, null)
+            _ => LogUnknownMode(mode, logger)
         };
+
+    private static Option<IPipelineStep> GetVaapiAcceleration(Option<string> vaapiDevice, ILogger logger)
+    {
+        foreach (string device in vaapiDevice)
+        {
+            return new VaapiHardwareAccelerationOption(device);
+        }
+
+        logger.LogWarning("VAAPI device name is missing; falling back to software mode");
+        return Option<IPipelineStep>.None;
+    }
+
+    private static Option<IPipelineStep> LogUnknownMode(HardwareAccelerationMode mode, ILogger logger)
+    {
+        logger.LogWarning("Unexpected hardware acceleration mode {AccelMode}; may have playback issues", mode);
+        return Option<IPipelineStep>.None;
     }
 }

ErsatzTV.FFmpeg/Option/HardwareAcceleration/VaapiHardwareAccelerationOption.cs

@@ -2,8 +2,15 @@
 
 public class VaapiHardwareAccelerationOption : GlobalOption
 {
+    private readonly string _vaapiDevice;
+
+    public VaapiHardwareAccelerationOption(string vaapiDevice)
+    {
+        _vaapiDevice = vaapiDevice;
+    }
+
     public override IList<string> GlobalOptions => new List<string>
-        { "-hwaccel", "vaapi", "-hwaccel_output_format", "vaapi" };
+        { "-hwaccel", "vaapi", "-vaapi_device", _vaapiDevice, "-hwaccel_output_format", "vaapi" };
 
     public override FrameState NextState(FrameState currentState) => currentState with
     {

ErsatzTV.FFmpeg/Option/InfiniteLoopInputOption.cs

@@ -1,4 +1,6 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public class InfiniteLoopInputOption : IPipelineStep
 {
@@ -9,6 +11,7 @@ public class InfiniteLoopInputOption : IPipelineStep
         _currentState = currentState;
     }
 
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => new List<string> { "-stream_loop", "-1" };
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Option/OutputOption.cs

@@ -1,8 +1,11 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public abstract class OutputOption : IPipelineStep
 {
     public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Unknown;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/Option/RealtimeInputOption.cs

@@ -1,7 +1,11 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public class RealtimeInputOption : IPipelineStep
 {
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
+
     // some builds of ffmpeg seem to hang when realtime input is requested with multithreading,
     // so we force a single thread here
     public IList<string> GlobalOptions => new List<string> { "-threads", "1" };

ErsatzTV.FFmpeg/Option/StreamSeekInputOption.cs

@@ -1,4 +1,6 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public class StreamSeekInputOption : IPipelineStep
 {
@@ -10,6 +12,7 @@ public class StreamSeekInputOption : IPipelineStep
     }
 
     public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Unknown;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions =>
         _start == TimeSpan.Zero ? Array.Empty<string>() : new List<string> { "-ss", $"{_start:c}" };

ErsatzTV.FFmpeg/Option/TimeLimitOutputOption.cs

@@ -1,4 +1,6 @@
-namespace ErsatzTV.FFmpeg.Option;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Option;
 
 public class TimeLimitOutputOption : IPipelineStep
 {
@@ -10,6 +12,7 @@ public class TimeLimitOutputOption : IPipelineStep
     }
 
     public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Unknown;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/OutputFormat/OutputFormatHls.cs

@@ -1,4 +1,5 @@
-using LanguageExt;
+using ErsatzTV.FFmpeg.Environment;
+using LanguageExt;
 
 namespace ErsatzTV.FFmpeg.OutputFormat;
 
@@ -21,7 +22,7 @@ public class OutputFormatHls : IPipelineStep
         _playlistPath = playlistPath;
     }
 
-    public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/OutputFormat/OutputFormatMpegTs.cs

@@ -1,8 +1,10 @@
-namespace ErsatzTV.FFmpeg.OutputFormat;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.OutputFormat;
 
 public class OutputFormatMpegTs : IPipelineStep
 {
-    public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.FFmpeg/PipelineBuilder.cs

@@ -1,5 +1,6 @@
 using ErsatzTV.FFmpeg.Decoder;
 using ErsatzTV.FFmpeg.Encoder;
+using ErsatzTV.FFmpeg.Environment;
 using ErsatzTV.FFmpeg.Filter;
 using ErsatzTV.FFmpeg.Format;
 using ErsatzTV.FFmpeg.Option;
@@ -18,9 +19,10 @@ public class PipelineBuilder
     private readonly List<IPipelineFilterStep> _audioFilterSteps;
     private readonly List<IPipelineFilterStep> _videoFilterSteps;
     private readonly IList<InputFile> _inputFiles;
+    private readonly string _reportsFolder;
     private readonly ILogger _logger;
 
-    public PipelineBuilder(IList<InputFile> inputFiles, ILogger logger)
+    public PipelineBuilder(IList<InputFile> inputFiles, string reportsFolder, ILogger logger)
     {
         _pipelineSteps = new List<IPipelineStep>
         {
@@ -38,6 +40,7 @@ public class PipelineBuilder
         _videoFilterSteps = new List<IPipelineFilterStep>();
 
         _inputFiles = inputFiles;
+        _reportsFolder = reportsFolder;
         _logger = logger;
     }
 
@@ -68,7 +71,10 @@ public class PipelineBuilder
             }
 
             var currentState = new FrameState(
+                false, // save report
                 HardwareAccelerationMode.None,
+                Option<string>.None,
+                Option<string>.None,
                 false, // realtime
                 false, // infinite loop
                 Option<TimeSpan>.None,
@@ -98,6 +104,13 @@ public class PipelineBuilder
                 Option<string>.None,
                 0);
 
+            if (desiredState.SaveReport && !currentState.SaveReport)
+            {
+                IPipelineStep step = new FFReportVariable(_reportsFolder, _inputFiles);
+                currentState = step.NextState(currentState);
+                _pipelineSteps.Add(step);
+            }
+
             foreach (TimeSpan desiredStart in desiredState.Start)
             {
                 if (currentState.Start != desiredStart)
@@ -129,13 +142,37 @@ public class PipelineBuilder
             }
             else
             {
-                // TODO: prioritize which codecs are used (hw accel)
                 if (currentState.HardwareAccelerationMode != desiredState.HardwareAccelerationMode)
                 {
-                    IPipelineStep accel =
-                        AvailableHardwareAccelerationOptions.ForMode(desiredState.HardwareAccelerationMode);
-                    currentState = accel.NextState(currentState);
-                    _pipelineSteps.Add(accel);
+                    Option<IPipelineStep> maybeAccel = AvailableHardwareAccelerationOptions.ForMode(
+                        desiredState.HardwareAccelerationMode,
+                        desiredState.VaapiDevice,
+                        _logger);
+
+                    if (maybeAccel.IsNone)
+                    {
+                        desiredState = desiredState with
+                        {
+                            // disable hw accel if we don't match anything
+                            HardwareAccelerationMode = HardwareAccelerationMode.None
+                        };
+                    }
+
+                    foreach (IPipelineStep accel in maybeAccel)
+                    {
+                        currentState = accel.NextState(currentState);
+                        _pipelineSteps.Add(accel);
+                    }
+                }
+
+                foreach (string desiredVaapiDriver in desiredState.VaapiDriver)
+                {
+                    if (currentState.VaapiDriver != desiredVaapiDriver)
+                    {
+                        IPipelineStep step = new LibvaDriverNameVariable(desiredVaapiDriver);
+                        currentState = step.NextState(currentState);
+                        _pipelineSteps.Add(step);
+                    }
                 }
 
                 foreach (IDecoder decoder in AvailableDecoders.ForVideoFormat(currentState, desiredState, _logger))

ErsatzTV.FFmpeg/Protocol/PipeProtocol.cs

@@ -1,8 +1,10 @@
-namespace ErsatzTV.FFmpeg.Protocol;
+using ErsatzTV.FFmpeg.Environment;
+
+namespace ErsatzTV.FFmpeg.Protocol;
 
 public class PipeProtocol : IPipelineStep
 {
-    public FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;
+    public IList<EnvironmentVariable> EnvironmentVariables => Array.Empty<EnvironmentVariable>();
     public IList<string> GlobalOptions => Array.Empty<string>();
     public IList<string> InputOptions => Array.Empty<string>();
     public IList<string> FilterOptions => Array.Empty<string>();

ErsatzTV.sln.DotSettings

@@ -1,6 +1,7 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
 	<s:Boolean x:Key="/Default/CodeInspection/CodeAnnotations/NamespacesWithAnnotations/=ErsatzTV_002EAnnotations/@EntryIndexedValue">True</s:Boolean>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=DTO/@EntryIndexedValue">DTO</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=FF/@EntryIndexedValue">FF</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=HDHR/@EntryIndexedValue">HDHR</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LE/@EntryIndexedValue">LE</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=NV/@EntryIndexedValue">NV</s:String>
@@ -28,6 +29,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=ffconcat/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=fflags/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=ffprobe/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=FFREPORT/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Fmpeg/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=fontfile/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Fprobe/@EntryIndexedValue">True</s:Boolean>
@@ -36,6 +38,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=igndts/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Jellyfin/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Libavfilter/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=Libva/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=libx/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=maxrate/@EntryIndexedValue">True</s:Boolean>