diff --git a/internal/ffmpeg/ffmpeg_test.go b/internal/ffmpeg/ffmpeg_test.go
index f7380927..7b7b43e2 100644
--- a/internal/ffmpeg/ffmpeg_test.go
+++ b/internal/ffmpeg/ffmpeg_test.go
@@ -6,31 +6,232 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestParseArgs(t *testing.T) {
-	args := parseArgs("rtsp://example.com#video=h264#rotate=180")
-	require.Equal(t, "ffmpeg -hide_banner -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v libx264 -g 50 -profile:v high -level:v 4.1 -preset:v superfast -tune:v zerolatency -pix_fmt:v yuvj420p -an -vf transpose=1,transpose=1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+func TestParseArgsFile(t *testing.T) {
+	// [FILE] all tracks will be copied without transcoding codecs
+	args := parseArgs("/media/bbb.mp4")
+	require.Equal(t, "ffmpeg -hide_banner -re -i /media/bbb.mp4 -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
 
-	args = parseArgs("rtsp://example.com#video=h264#rotate=180#hardware=vaapi")
-	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v h264_vaapi -g 50 -bf 0 -profile:v high -level:v 4.1 -sei:v 0 -an -vf format=vaapi|nv12,hwupload,transpose_vaapi=4 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+	// [FILE] video will be transcoded to H264, audio will be skipped
+	args = parseArgs("/media/bbb.mp4#video=h264")
+	require.Equal(t, "ffmpeg -hide_banner -re -i /media/bbb.mp4 -c:v libx264 -g 50 -profile:v high -level:v 4.1 -preset:v superfast -tune:v zerolatency -pix_fmt:v yuvj420p -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
 
+	// [FILE] video will be copied, audio will be transcoded to pcmu
+	args = parseArgs("/media/bbb.mp4#video=copy#audio=pcmu")
+	require.Equal(t, "ffmpeg -hide_banner -re -i /media/bbb.mp4 -c:v copy -c:a pcm_mulaw -ar:a 8000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [FILE] video will be transcoded to H265 and rotate 270º, audio will be skipped
+	args = parseArgs("/media/bbb.mp4#video=h265#rotate=-90")
+	require.Equal(t, "ffmpeg -hide_banner -re -i /media/bbb.mp4 -c:v libx265 -g 50 -profile:v main -level:v 5.1 -preset:v superfast -tune:v zerolatency -an -vf transpose=2 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [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())
+}
 
-	args = parseArgs("/media/bbb.mp4#video=mjpeg#hardware=vaapi")
-	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -re -i /media/bbb.mp4 -c:v mjpeg_vaapi -an -vf format=vaapi|nv12,hwupload -f mjpeg -", args.String())
-
-	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080")
+func TestParseArgsDevice(t *testing.T) {
+	// [DEVICE] video will be output for MJPEG to pipe, with size 1920x1080
+	args := parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080")
 	require.Equal(t, `ffmpeg -hide_banner -f dshow -input_format mjpeg -video_size 1920x1080 -i video="0" -c copy -f mjpeg -`, args.String())
 
-	args = parseArgs("http://example.com")
+	// [DEVICE] video will be transcoded to H264 with framerate 20, audio will be skipped
+	args = parseArgs("device?video=0&framerate=20#video=h264")
+	require.Equal(t, `ffmpeg -hide_banner -f dshow -framerate 20 -i video="0" -c:v libx264 -g 50 -profile:v high -level:v 4.1 -preset:v superfast -tune:v zerolatency -pix_fmt:v yuvj420p -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+
+	// [DEVICE] video will be transcoded to H265 with framerate 20, audio will be skipped
+	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1280x720&framerate=20#video=h265#audio=pcma")
+	require.Equal(t, `ffmpeg -hide_banner -f dshow -input_format mjpeg -video_size 1280x720 -framerate 20 -i video="0" -c:v libx265 -g 50 -profile:v main -level:v 5.1 -preset:v superfast -tune:v zerolatency -c:a pcm_alaw -ar:a 8000 -ac:a 1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+}
+
+func TestParseArgsIpCam(t *testing.T) {
+	// [HTTP] video will be copied
+	args := parseArgs("http://example.com")
 	require.Equal(t, "ffmpeg -hide_banner -fflags nobuffer -flags low_delay -i http://example.com -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
 
+	// [HTTP-MJPEG] video will be transcoded to H264
 	args = parseArgs("http://example.com#video=h264")
 	require.Equal(t, "ffmpeg -hide_banner -fflags nobuffer -flags low_delay -i http://example.com -c:v libx264 -g 50 -profile:v high -level:v 4.1 -preset:v superfast -tune:v zerolatency -pix_fmt:v yuvj420p -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
 
+	// [HTTP-MJPEG] video will copy, need of set frame rate explicitly
 	args = parseArgs("http://example.com#framerate=20")
 	require.Equal(t, "ffmpeg -hide_banner -framerate 20 -fflags nobuffer -flags low_delay -i http://example.com -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
 
+	// [HTTP-MJPEG] video will be transcoded to H264, need of set frame rate explicitly
 	args = parseArgs("http://example.com#framerate=20#video=h264")
 	require.Equal(t, "ffmpeg -hide_banner -framerate 20 -fflags nobuffer -flags low_delay -i http://example.com -c:v libx264 -g 50 -profile:v high -level:v 4.1 -preset:v superfast -tune:v zerolatency -pix_fmt:v yuvj420p -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [HLS] video will be copied, audio will be skipped
+	args = parseArgs("https://example.com#video=copy")
+	require.Equal(t, "ffmpeg -hide_banner -fflags nobuffer -flags low_delay -i https://example.com -c:v copy -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video will be copied without transcoding codecs
+	args = parseArgs("rtsp://example.com")
+	require.Equal(t, "ffmpeg -hide_banner -allowed_media_types video+audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with resize to 1280x720, should be transcoded, so select H265
+	args = parseArgs("rtsp://example.com#video=h265#width=1280#height=720")
+	require.Equal(t, "ffmpeg -hide_banner -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v libx265 -g 50 -profile:v main -level:v 5.1 -preset:v superfast -tune:v zerolatency -an -vf scale=1280:720 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video will be copied, changing RTSP transport from TCP to UDP+TCP
+	args = parseArgs("rtsp://example.com#input=rtsp/udp")
+	require.Equal(t, "ffmpeg -hide_banner -allowed_media_types video+audio -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -i rtsp://example.com -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTMP] video will be copied, changing RTSP transport from TCP to UDP+TCP
+	args = parseArgs("rtmp://example.com#input=rtsp/udp")
+	require.Equal(t, "ffmpeg -hide_banner -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -i rtmp://example.com -c copy -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+}
+
+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())
+
+	// [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())
+
+	// [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 -compression_level:a 0 -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())
+
+	// [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())
+
+	// [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())
+
+	// [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())
+
+	// [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())
+
+	// [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())
+}
+
+func TestParseArgsHwVaapi(t *testing.T) {
+	// [HTTP-MJPEG] video will be transcoded to H264
+	args := parseArgs("http:///example.com#video=h264#hardware=vaapi")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -fflags nobuffer -flags low_delay -i http:///example.com -c:v h264_vaapi -g 50 -bf 0 -profile:v high -level:v 4.1 -sei:v 0 -an -vf format=vaapi|nv12,hwupload -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [HTTP-MJPEG] video will be transcoded to H264, need of set frame rate explicitly
+	args = parseArgs("http://example.com#video=h264#framerate=10#hardware=vaapi")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -framerate 10 -fflags nobuffer -flags low_delay -i http://example.com -c:v h264_vaapi -g 50 -bf 0 -profile:v high -level:v 4.1 -sei:v 0 -an -vf format=vaapi|nv12,hwupload -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with rotation, should be transcoded, so select H264
+	args = parseArgs("rtsp://example.com#video=h264#rotate=180#hardware=vaapi")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v h264_vaapi -g 50 -bf 0 -profile:v high -level:v 4.1 -sei:v 0 -an -vf format=vaapi|nv12,hwupload,transpose_vaapi=4 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with resize to 1280x720, should be transcoded, so select H265
+	args = parseArgs("rtsp://example.com#video=h265#width=1280#height=720#hardware=vaapi")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v hevc_vaapi -g 50 -bf 0 -profile:v high -level:v 5.1 -sei:v 0 -an -vf format=vaapi|nv12,hwupload,scale_vaapi=1280:720 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [FILE] video will be output for MJPEG to pipe, audio will be skipped
+	args = parseArgs("/media/bbb.mp4#video=mjpeg#hardware=vaapi")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -re -i /media/bbb.mp4 -c:v mjpeg_vaapi -an -vf format=vaapi|nv12,hwupload -f mjpeg -", args.String())
+
+	// [DEVICE] MJPEG video with size 1920x1080 will be transcoded to H265
+	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080#video=h265#hardware=vaapi")
+	require.Equal(t, `ffmpeg -hide_banner -hwaccel vaapi -hwaccel_output_format vaapi -f dshow -input_format mjpeg -video_size 1920x1080 -i video="0" -c:v hevc_vaapi -g 50 -bf 0 -profile:v high -level:v 5.1 -sei:v 0 -an -vf format=vaapi|nv12,hwupload -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+}
+
+func TestParseArgsHwV4l2m2m(t *testing.T) {
+	// [HTTP-MJPEG] video will be transcoded to H264
+	args := parseArgs("http:///example.com#video=h264#hardware=v4l2m2m")
+	require.Equal(t, "ffmpeg -hide_banner -fflags nobuffer -flags low_delay -i http:///example.com -c:v h264_v4l2m2m -g 50 -bf 0 -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [HTTP-MJPEG] video will be transcoded to H264, need of set frame rate explicitly
+	args = parseArgs("http://example.com#video=h264#framerate=10#hardware=v4l2m2m")
+	require.Equal(t, "ffmpeg -hide_banner -framerate 10 -fflags nobuffer -flags low_delay -i http://example.com -c:v h264_v4l2m2m -g 50 -bf 0 -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with rotation, should be transcoded, so select H264
+	args = parseArgs("rtsp://example.com#video=h264#rotate=180#hardware=v4l2m2m")
+	require.Equal(t, "ffmpeg -hide_banner -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v h264_v4l2m2m -g 50 -bf 0 -an -vf transpose=1,transpose=1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with resize to 1280x720, should be transcoded, so select H265
+	args = parseArgs("rtsp://example.com#video=h265#width=1280#height=720#hardware=v4l2m2m")
+	require.Equal(t, "ffmpeg -hide_banner -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v hevc_v4l2m2m -g 50 -bf 0 -an -vf scale=1280:720 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [DEVICE] MJPEG video with size 1920x1080 will be transcoded to H265
+	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080#video=h265#hardware=v4l2m2m")
+	require.Equal(t, `ffmpeg -hide_banner -f dshow -input_format mjpeg -video_size 1920x1080 -i video="0" -c:v hevc_v4l2m2m -g 50 -bf 0 -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+}
+
+func TestParseArgsHwCuda(t *testing.T) {
+	// [HTTP-MJPEG] video will be transcoded to H264
+	args := parseArgs("http:///example.com#video=h264#hardware=cuda")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel cuda -hwaccel_output_format cuda -extra_hw_frames 2 -fflags nobuffer -flags low_delay -i http:///example.com -c:v h264_nvenc -g 50 -profile:v high -level:v auto -preset:v p2 -tune:v ll -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [HTTP-MJPEG] video will be transcoded to H264, need of set frame rate explicitly
+	args = parseArgs("http://example.com#video=h264#framerate=10#hardware=cuda")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel cuda -hwaccel_output_format cuda -extra_hw_frames 2 -framerate 10 -fflags nobuffer -flags low_delay -i http://example.com -c:v h264_nvenc -g 50 -profile:v high -level:v auto -preset:v p2 -tune:v ll -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with rotation, should be transcoded, so select H264
+	args = parseArgs("rtsp://example.com#video=h264#rotate=180#hardware=cuda")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel cuda -hwaccel_output_format cuda -extra_hw_frames 2 -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v h264_nvenc -g 50 -profile:v high -level:v auto -preset:v p2 -tune:v ll -an -vf transpose=1,transpose=1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with resize to 1280x720, should be transcoded, so select H265
+	args = parseArgs("rtsp://example.com#video=h265#width=1280#height=720#hardware=cuda")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel cuda -hwaccel_output_format cuda -extra_hw_frames 2 -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v hevc_nvenc -g 50 -profile:v high -level:v auto -an -vf scale_cuda=1280:720 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [DEVICE] MJPEG video with size 1920x1080 will be transcoded to H265
+	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080#video=h265#hardware=cuda")
+	require.Equal(t, `ffmpeg -hide_banner -hwaccel cuda -hwaccel_output_format cuda -extra_hw_frames 2 -f dshow -input_format mjpeg -video_size 1920x1080 -i video="0" -c:v hevc_nvenc -g 50 -profile:v high -level:v auto -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+}
+
+func TestParseArgsHwDxva2(t *testing.T) {
+	// [HTTP-MJPEG] video will be transcoded to H264
+	args := parseArgs("http:///example.com#video=h264#hardware=dxva2")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel dxva2 -hwaccel_output_format dxva2_vld -fflags nobuffer -flags low_delay -i http:///example.com -c:v h264_qsv -g 50 -bf 0 -profile:v high -level:v 4.1 -async_depth:v 1 -an -vf hwmap=derive_device=qsv,format=qsv -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [HTTP-MJPEG] video will be transcoded to H264, need of set frame rate explicitly
+	args = parseArgs("http://example.com#video=h264#framerate=10#hardware=dxva2")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel dxva2 -hwaccel_output_format dxva2_vld -framerate 10 -fflags nobuffer -flags low_delay -i http://example.com -c:v h264_qsv -g 50 -bf 0 -profile:v high -level:v 4.1 -async_depth:v 1 -an -vf hwmap=derive_device=qsv,format=qsv -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with rotation, should be transcoded, so select H264
+	args = parseArgs("rtsp://example.com#video=h264#rotate=180#hardware=dxva2")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel dxva2 -hwaccel_output_format dxva2_vld -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v h264_qsv -g 50 -bf 0 -profile:v high -level:v 4.1 -async_depth:v 1 -an -vf hwmap=derive_device=qsv,format=qsv,transpose=1,transpose=1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with resize to 1280x720, should be transcoded, so select H265
+	args = parseArgs("rtsp://example.com#video=h265#width=1280#height=720#hardware=dxva2")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel dxva2 -hwaccel_output_format dxva2_vld -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v hevc_qsv -g 50 -bf 0 -profile:v high -level:v 5.1 -async_depth:v 1 -an -vf hwmap=derive_device=qsv,format=qsv,scale_qsv=1280:720 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [FILE] video will be output for MJPEG to pipe, audio will be skipped
+	args = parseArgs("/media/bbb.mp4#video=mjpeg#hardware=dxva2")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel dxva2 -hwaccel_output_format dxva2_vld -re -i /media/bbb.mp4 -c:v mjpeg_qsv -profile:v high -level:v 5.1 -an -vf hwmap=derive_device=qsv,format=qsv -f mjpeg -", args.String())
+
+	// [DEVICE] MJPEG video with size 1920x1080 will be transcoded to H265
+	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080#video=h265#hardware=dxva2")
+	require.Equal(t, `ffmpeg -hide_banner -hwaccel dxva2 -hwaccel_output_format dxva2_vld -f dshow -input_format mjpeg -video_size 1920x1080 -i video="0" -c:v hevc_qsv -g 50 -bf 0 -profile:v high -level:v 5.1 -async_depth:v 1 -an -vf hwmap=derive_device=qsv,format=qsv -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
+}
+
+func TestParseArgsHwVideotoolbox(t *testing.T) {
+	// [HTTP-MJPEG] video will be transcoded to H264
+	args := parseArgs("http:///example.com#video=h264#hardware=videotoolbox")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld -fflags nobuffer -flags low_delay -i http:///example.com -c:v h264_videotoolbox -g 50 -bf 0 -profile:v high -level:v 4.1 -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [HTTP-MJPEG] video will be transcoded to H264, need of set frame rate explicitly
+	args = parseArgs("http://example.com#video=h264#framerate=10#hardware=videotoolbox")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld -framerate 10 -fflags nobuffer -flags low_delay -i http://example.com -c:v h264_videotoolbox -g 50 -bf 0 -profile:v high -level:v 4.1 -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with rotation, should be transcoded, so select H264
+	args = parseArgs("rtsp://example.com#video=h264#rotate=180#hardware=videotoolbox")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v h264_videotoolbox -g 50 -bf 0 -profile:v high -level:v 4.1 -an -vf transpose=1,transpose=1 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [RTSP] video with resize to 1280x720, should be transcoded, so select H265
+	args = parseArgs("rtsp://example.com#video=h265#width=1280#height=720#hardware=videotoolbox")
+	require.Equal(t, "ffmpeg -hide_banner -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld -allowed_media_types video -fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -rtsp_flags prefer_tcp -i rtsp://example.com -c:v hevc_videotoolbox -g 50 -bf 0 -profile:v high -level:v 5.1 -an -vf scale=1280:720 -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}", args.String())
+
+	// [DEVICE] MJPEG video with size 1920x1080 will be transcoded to H265
+	args = parseArgs("device?video=0&input_format=mjpeg&video_size=1920x1080#video=h265#hardware=videotoolbox")
+	require.Equal(t, `ffmpeg -hide_banner -hwaccel videotoolbox -hwaccel_output_format videotoolbox_vld -f dshow -input_format mjpeg -video_size 1920x1080 -i video="0" -c:v hevc_videotoolbox -g 50 -bf 0 -profile:v high -level:v 5.1 -an -user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}`, args.String())
 }