Adding support for ffprobe show frames

Former-commit-id: 93131a7cd0

FFMpegCore/FFProbe/FFProbe.cs

@@ -25,6 +25,18 @@ public static IMediaAnalysis Analyse(string filePath, int outputCapacity = int.M
             
             return ParseOutput(instance);
         }
+        public static FFProbeFrames GetFrames(string filePath, int outputCapacity = int.MaxValue, FFOptions? ffOptions = null)
+        {
+            if (!File.Exists(filePath))
+                throw new FFMpegException(FFMpegExceptionType.File, $"No file found at '{filePath}'");
+
+            using var instance = PrepareProbeInstance(filePath, outputCapacity, ffOptions ?? GlobalFFOptions.Current);
+            var exitCode = instance.BlockUntilFinished();
+            if (exitCode != 0)
+                throw new FFMpegException(FFMpegExceptionType.Process, $"ffprobe exited with non-zero exit-code ({exitCode} - {string.Join("\n", instance.ErrorData)})", null, string.Join("\n", instance.ErrorData));
+
+            return ParseFramesOutput(instance);
+        }
         public static IMediaAnalysis Analyse(Uri uri, int outputCapacity = int.MaxValue, FFOptions? ffOptions = null)
         {
             using var instance = PrepareInstance(uri.AbsoluteUri, outputCapacity, ffOptions ?? GlobalFFOptions.Current);
@@ -66,6 +78,16 @@ public static async Task<IMediaAnalysis> AnalyseAsync(string filePath, int outpu
             await instance.FinishedRunning().ConfigureAwait(false);
             return ParseOutput(instance);
         }
+
+        public static async Task<FFProbeFrames> GetFramesAsync(string filePath, int outputCapacity = int.MaxValue, FFOptions? ffOptions = null)
+        {
+            if (!File.Exists(filePath))
+                throw new FFMpegException(FFMpegExceptionType.File, $"No file found at '{filePath}'");
+
+            using var instance = PrepareProbeInstance(filePath, outputCapacity, ffOptions ?? GlobalFFOptions.Current);
+            await instance.FinishedRunning().ConfigureAwait(false);
+            return ParseFramesOutput(instance);
+        }
         public static async Task<IMediaAnalysis> AnalyseAsync(Uri uri, int outputCapacity = int.MaxValue, FFOptions? ffOptions = null)
         {
             using var instance = PrepareInstance(uri.AbsoluteUri, outputCapacity, ffOptions ?? GlobalFFOptions.Current);
@@ -112,6 +134,17 @@ private static IMediaAnalysis ParseOutput(Instance instance)
             
             return new MediaAnalysis(ffprobeAnalysis);
         }
+        private static FFProbeFrames ParseFramesOutput(Instance instance)
+        {
+            var json = string.Join(string.Empty, instance.OutputData);
+            var ffprobeAnalysis = JsonSerializer.Deserialize<FFProbeFrames>(json, new JsonSerializerOptions
+            {
+                PropertyNameCaseInsensitive = true,
+                NumberHandling = System.Text.Json.Serialization.JsonNumberHandling.AllowReadingFromString | System.Text.Json.Serialization.JsonNumberHandling.WriteAsString
+            }) ;
+
+            return ffprobeAnalysis;
+        }
 
         private static Instance PrepareInstance(string filePath, int outputCapacity, FFOptions ffOptions)
         {
@@ -126,5 +159,18 @@ private static Instance PrepareInstance(string filePath, int outputCapacity, FFO
             var instance = new Instance(startInfo) { DataBufferCapacity = outputCapacity };
             return instance;
         }
+        private static Instance PrepareProbeInstance(string filePath, int outputCapacity, FFOptions ffOptions)
+        {
+            FFProbeHelper.RootExceptionCheck();
+            FFProbeHelper.VerifyFFProbeExists(ffOptions);
+            var arguments = $"-loglevel error -print_format json -show_frames -v quiet -sexagesimal \"{filePath}\"";
+            var startInfo = new ProcessStartInfo(GlobalFFOptions.GetFFProbeBinaryPath(), arguments)
+            {
+                StandardOutputEncoding = ffOptions.Encoding,
+                StandardErrorEncoding = ffOptions.Encoding
+            };
+            var instance = new Instance(startInfo) { DataBufferCapacity = outputCapacity };
+            return instance;
+        }
     }
 }

FFMpegCore/FFProbe/FrameAnalysis.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json.Serialization;
+
+namespace FFMpegCore
+{
+    public class Frame
+    {
+        public string media_type { get; set; }
+        public int stream_index { get; set; }
+        public int key_frame { get; set; }
+        public long pkt_pts { get; set; }
+        public string pkt_pts_time { get; set; }
+        public long pkt_dts { get; set; }
+        public string pkt_dts_time { get; set; }
+        public long best_effort_timestamp { get; set; }
+        public string best_effort_timestamp_time { get; set; }
+        public int pkt_duration { get; set; }
+        public string pkt_duration_time { get; set; }
+        public long pkt_pos { get; set; }
+        public int pkt_size { get; set; }
+        public long width { get; set; }
+        public long height { get; set; }
+        public string pix_fmt { get; set; }
+        public string pict_type { get; set; }
+        public long coded_picture_number { get; set; }
+        public long display_picture_number { get; set; }
+        public int interlaced_frame { get; set; }
+        public int top_field_first { get; set; }
+        public int repeat_pict { get; set; }
+        public string chroma_location { get; set; }
+    }
+
+    public class FFProbeFrames
+    {
+        public List<Frame> frames { get; set; }
+    }
+}