diff --git a/internal/ffmpeg/ffmpeg.go b/internal/ffmpeg/ffmpeg.go
index 287206d2..0c882db5 100644
--- a/internal/ffmpeg/ffmpeg.go
+++ b/internal/ffmpeg/ffmpeg.go
@@ -116,7 +116,6 @@ func configTemplate(template string) string {
 // inputTemplate - select input template from YAML config by template name
 // if query has input param - select another template by this name
 // if there is no another template - use input param as template
-// After input param processed - remove it to allow a correct parseArgs Codec selection
 func inputTemplate(name, s string, query url.Values) string {
 	var template string
 	if input := query.Get("input"); input != "" {
@@ -124,7 +123,6 @@ func inputTemplate(name, s string, query url.Values) string {
 	} else {
 		template = defaults[name]
 	}
-	query.Del("input")
 	return strings.Replace(template, "{input}", s, 1)
 }
 
@@ -199,7 +197,7 @@ func parseArgs(s string) *ffmpeg.Args {
 	//   3. `video` params (support multiple)
 	//   4. `audio` params (support multiple)
 	//   5. `hardware` param
-	if len(query) != 0 {
+	if query != nil {
 		// 1. Process raw params for FFmpeg
 		for _, raw := range query["raw"] {
 			// support templates https://github.com/AlexxIT/go2rtc/issues/487
@@ -264,8 +262,6 @@ func parseArgs(s string) *ffmpeg.Args {
 					args.AddCodec("-c:v copy")
 				}
 			}
-		} else {
-			args.AddCodec("-vn")
 		}
 
 		// 4. Process audio codecs
@@ -281,8 +277,6 @@ func parseArgs(s string) *ffmpeg.Args {
 					args.AddCodec("-c:a copy")
 				}
 			}
-		} else {
-			args.AddCodec("-an")
 		}
 
 		if query["hardware"] != nil {
@@ -290,8 +284,13 @@ func parseArgs(s string) *ffmpeg.Args {
 		}
 	}
 
-	if args.Codecs == nil {
+	switch {
+	case args.Video == 0 && args.Audio == 0:
 		args.AddCodec("-c copy")
+	case args.Video == 0:
+		args.AddCodec("-vn")
+	case args.Audio == 0:
+		args.AddCodec("-an")
 	}
 
 	// transcoding to only mjpeg
diff --git a/internal/ffmpeg/ffmpeg_test.go b/internal/ffmpeg/ffmpeg_test.go
index fe78c7c9..1e2c1191 100644
--- a/internal/ffmpeg/ffmpeg_test.go
+++ b/internal/ffmpeg/ffmpeg_test.go
@@ -26,6 +26,10 @@ func TestParseArgsFile(t *testing.T) {
 	// [FILE] video will be output for MJPEG to pipe, audio will be skipped
 	args = parseArgs("/media/bbb.mp4#video=mjpeg")
 	require.Equal(t, `ffmpeg -hide_banner -re -i /media/bbb.mp4 -c:v mjpeg -an -f mjpeg -`, args.String())
+
+	// https://github.com/AlexxIT/go2rtc/issues/509
+	args = parseArgs("ffmpeg:test.mp4#raw=-ss 00:00:20")
+	require.Equal(t, `ffmpeg -hide_banner -re -i ffmpeg:test.mp4 -ss 00:00:20 -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 }
 
 func TestParseArgsDevice(t *testing.T) {
@@ -71,39 +75,39 @@ func TestParseArgsIpCam(t *testing.T) {
 func TestParseArgsAudio(t *testing.T) {
 	// [AUDIO] audio will be transcoded to AAC, video will be skipped
 	args := parseArgs("rtsp:///example.com#audio=aac")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a aac -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a aac -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to AAC/16000, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=aac/16000")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a aac -ar:a 16000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a aac -ar:a 16000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to OPUS, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=opus")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a libopus -ar:a 48000 -ac:a 2 -application:a voip -af adelay=0|0 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a libopus -ar:a 48000 -ac:a 2 -application:a voip -af adelay=0|0 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to PCMU, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=pcmu")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a pcm_mulaw -ar:a 8000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a pcm_mulaw -ar:a 8000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to PCMU/16000, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=pcmu/16000")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a pcm_mulaw -ar:a 16000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a pcm_mulaw -ar:a 16000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to PCMU/48000, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=pcmu/48000")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a pcm_mulaw -ar:a 48000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a pcm_mulaw -ar:a 48000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to PCMA, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=pcma")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a pcm_alaw -ar:a 8000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a pcm_alaw -ar:a 8000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to PCMA/16000, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=pcma/16000")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a pcm_alaw -ar:a 16000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a pcm_alaw -ar:a 16000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 
 	// [AUDIO] audio will be transcoded to PCMA/48000, video will be skipped
 	args = parseArgs("rtsp:///example.com#audio=pcma/48000")
-	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -vn -c:a pcm_alaw -ar:a 48000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+	require.Equal(t, `ffmpeg -hide_banner -allowed_media_types audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp:///example.com -c:a pcm_alaw -ar:a 48000 -ac:a 1 -vn -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 }
 
 func TestParseArgsHwVaapi(t *testing.T) {