ffmpeg: use one command to stream video/audio

http/hw/stream/ffmpeg.go

@@ -23,6 +23,12 @@ arecord -D hw:0,0 -f cd -r 44100 -c 2 | /app/ffmpeg -re -init_hw_device rkmpp=hw
 
 
 arecord -D hw:0,0 -f cd -r 44100 -c 2 | /app/ffmpeg -re -f wav -i pipe:0 -c:a aac -b:a 128k -ar 44100 -ac 2 -f rtp rtp://127.0.0.1:5006?pkt_size=1200
+
+arecord -D hw:0,0 -f dat -r 48000 -c 2 --buffer-size=60 | /app/ffmpeg -re -init_hw_device rkmpp=hw -filter_hw_device hw \
+-f wav -i pipe:0 -map 0:a -c:a libopus -b:a 48000 -sample_fmt s16 -ssrc 1 -payload_type 111 -f rtp -max_delay 0 -application lowdelay \
+-f rtp rtp://127.0.0.1:5006?pkt_size=1200 \
+-i /dev/video0 -map 1:v -vf hwupload,scale_rkrga=h=720:force_original_aspect_ratio=1 -c:v h264_rkmpp -flags +low_delay -b:v 6000000 -framerate 60 -g 10 \
+-f rtp rtp://127.0.0.1:5004?pkt_size=1200
 */
 
 // https://jsfiddle.net/z7ms3u5r/
@@ -30,50 +36,57 @@ arecord -D hw:0,0 -f cd -r 44100 -c 2 | /app/ffmpeg -re -f wav -i pipe:0 -c:a aa
 var ffmpeg *FFmpeg
 
 type FFmpeg struct {
-	*ExtProcess
+	*PipedCmd
 	config.FFmpeg
 }
 
+func (f *FFmpeg) getCmd() string {
+	return f.Commands[config.StreamInputVideoAudio]
+}
+
 func (f *FFmpeg) SetBitrate(b int) {
 	f.Bitrate = b
 	if f.Bitrate < 0 {
 		f.Bitrate = 6000
 	}
-
-	f.ChangeArgs(f.FormatArgs())
 }
 
 func (f *FFmpeg) SetFPS(fps int) {
 	f.FPS = fps
 	if f.FPS < 0 {
 		f.FPS = 30
+	} else if f.FPS > 60 {
+		f.FPS = 60
 	}
-
-	f.ChangeArgs(f.FormatArgs())
 }
 
 func (f *FFmpeg) SetResolution(height int) {
 	f.Height = height
 	if f.Height <= 0 {
 		f.Height = 1080
+	} else if f.Height > 2060 {
+		f.Height = 2060
 	}
-
-	f.ChangeArgs(f.FormatArgs())
 }
 
 func (f *FFmpeg) SetGOP(gop int) {
 	f.GOP = gop
 	if f.GOP < 0 {
-		f.GOP = 0
+		f.GOP = 2
 	}
-
-	f.ChangeArgs(f.FormatArgs())
 }
 
-func InitFFmpeg(path string, args []string) *FFmpeg {
+func (f *FFmpeg) ApplyOptions() {
+	f.ChangeCmd(f.FormatCmd(f.getCmd()))
+}
+
+func InitFFmpeg() *FFmpeg {
+	cfg := config.Get().Video
+	cmd := cfg.Commands[config.StreamInputVideoAudio]
+
 	ffmpeg = &FFmpeg{
-		ExtProcess: Init(path, args),
-		FFmpeg:     config.Get().Video,
+		PipedCmd: InitPipedCmd(cfg.FormatCmd(cmd)),
+		FFmpeg:   cfg,
 	}
 	return ffmpeg
 }