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mpromonet / v4l2rtspserver

RTSP Server for V4L2 device capture supporting HEVC/H264/JPEG/VP8/VP9
The Unlicense
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ALSA device is available but cannot use ALSA command #190

Closed imchesterhk closed 4 years ago

imchesterhk commented 4 years ago

Hi,

Thank you for the great work, i am able to get the video from the USB HDMI capture card and stream it via network, but seem i cannot get the audio . and i checked with the command with arecord -l, shows below.

pi@raspberrypi:~/v4l2rtspserver $ arecord -l **** List of CAPTURE Hardware Devices **** card 2: Device_1 [Live Streaming USB Device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0

but when i try with command v4l2rtspserver -W 1920 -H 1080 -F 29 -p 8555 /dev/video0,hw:2 -A 48000 -a S16_LE

it just shows the full help page and it is not showing the ALSA part. Is it something wrong with my hardware thats not support with this v4l2rtspserver ? Thank you ..

mpromonet commented 4 years ago

Hi imchesterhk,

If the ALSA part is not shown using -h argument, it means it has been built without ALSA support. When cmake run it detects if ALSA is available and print Alsa available, if not ALSA is disabled (and then giving -a -A or -C will return the help).
Installing ALSA dev package and rebuilding should solve the problem.

Best Regards, Michel.

imchesterhk commented 4 years ago

if i do the command cat /proc/asound/cards it shows pi@raspberrypi:~/v4l2rtspserver $ cat /proc/asound/cards 0 [ALSA ]: bcm2835_alsa - bcm2835 ALSA bcm2835 ALSA 2 [Device_1 ]: USB-Audio - Live Streaming USB Device eEver Live Streaming USB Device at usb-0000:01:00.0-2, super speed does it really mean my device is not support ? and can you more specific about "Installing ALSA dev package and rebuilding" ? is it i need to install some new package to solve this problem ? or have to rebuild some software by myself to solve this ? i am new about this, sorry for bother .. and thank you so much !

mpromonet commented 4 years ago

Hi,

If you are using the arm release from https://github.com/mpromonet/v4l2rtspserver/releases, the package libasound2-dev is not installed (only the x86_64 is built with ALSA because I never try to solve the cross-compiling of ALSA libraries). The dev package is need to brings libraries and include used by ALSA support.

Using the snap release https://build.snapcraft.io/user/mpromonet/v4l2rtspserver it is built with sound support.

When I was saying "Installing ALSA dev package", this could be done running: 

sudo apt install  g++ make cmake pkg-config liblog4cpp5-dev libasound2-dev
git clone https://github.com/mpromonet/v4l2rtspserver
cd v4l2rtspserver
cmake . && make && make install

Best Regards, Michel.

imchesterhk commented 4 years ago 
sudo apt install  g++ make cmake pkg-config liblog4cpp5-dev libasound2-dev
git clone https://github.com/mpromonet/v4l2rtspserver
cd v4l2rtspserver
cmake . && make && make install

After i doing this, i am now able to stream the video and audio together !!! Thank you again Michel !