ffmpeg/detector: Add support for content detection

Co-authored-by: Jai Luthra <me@jailuthra.in>

cmd/transcoding/transcoding.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/livepeer/lpms/ffmpeg"
 )
@@ -48,7 +49,9 @@ func main() {
 			o := ffmpeg.TranscodeOptions{
 				Oname:   fmt.Sprintf("out_%s_%d_out.mkv", lbl, i),
 				Profile: profs[i],
-				Accel:   accel,
+				// Uncomment the following to test scene classifier
+				// Detector: &ffmpeg.DSceneAdultSoccer,
+				Accel: accel,
 			}
 			opts = append(opts, o)
 		}
@@ -66,6 +69,7 @@ func main() {
 
 	ffmpeg.InitFFmpeg()
 
+	t := time.Now()
 	fmt.Printf("Setting fname %s encoding %d renditions with %v\n", fname, len(options), lbl)
 	res, err := ffmpeg.Transcode3(&ffmpeg.TranscodeOptionsIn{
 		Fname:  fname,
@@ -75,8 +79,14 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
+	end := time.Now()
 	fmt.Printf("profile=input frames=%v pixels=%v\n", res.Decoded.Frames, res.Decoded.Pixels)
 	for i, r := range res.Encoded {
-		fmt.Printf("profile=%v frames=%v pixels=%v\n", profiles[i].Name, r.Frames, r.Pixels)
+		if r.DetectData != nil {
+			fmt.Printf("profile=%v frames=%v pixels=%v detectdata=%v\n", profiles[i].Name, r.Frames, r.Pixels, r.DetectData)
+		} else {
+			fmt.Printf("profile=%v frames=%v pixels=%v\n", profiles[i].Name, r.Frames, r.Pixels)
+		}
 	}
+	fmt.Printf("Transcoding time %0.4v\n", end.Sub(t).Seconds())
 }