I am new here and have a big question:
I want to stream video + audio via RTMP from my raspi 4b and so far I did this via “libcamera-vid --codec libav --libav-audio…” with my HQ camera.
Now I would like to get there with the arducam 64mp.
Unfortunately libav is not included?
Is there any way to get libav-audio working with the “Hawkeye” to add synchronized audio?
If this is even impossible (I am not fully aware of how the magic happens, v4l2, libcamera, libav, ffmpeg etc…) is there a better/alternative way streaming video+audio via RTMP?
I have IMX462 low light camera from arducam and Adafruit I2S MEMS Microphone Breakout.
I want to capture video and audio using libcamera-vid and split the feed into files for drive recorder.
Audio is one of very important evidence when accident happens.
So I desperately need audio recording function to libcamera-vid.
I already tried gstreamer but they require large CPU consumption so I need to ise libcamera-vid for my purpose.
Please include this audio recording function (libav support?)
Does the libcamera-vid app provided in pre-compiled binary support libav option?
I use RasbberyPi Zero 2 W, IMX462 from arducam and followed instructions:
I already tried libcamera-vid working OK but I can’t see the option to designate libav documented in :
here is the info:
[email protected]:~ $ uname -a
Linux raspberrypi 5.15.32-v7+ #1538 SMP Thu Mar 31 19:38:48 BST 2022 armv7l GNU/Linux
[email protected]:~ $ libcamera-vid --version
libcamera-apps build: f047a5b01578-intree 12-07-2022 (03:13:06)
libcamera build: v0.0.0+3730-67300b62
[email protected]:~ $ libcamera-vid -h
Valid options are:
-h [ --help ] [=arg(=1)] (=0) Print this help message
--version [=arg(=1)] (=0) Displays the build version number
--list-cameras [=arg(=1)] (=0) Lists the available cameras attached to the system.
--camera arg (=0) Chooses the camera to use. To list the available indexes, use the
-v [ --verbose ] [=arg(=1)] (=0) Output extra debug and diagnostics
-c [ --config ] [=arg(=config.txt)] Read the options from a file. If no filename is specified, default to
config.txt. In case of duplicate options, the ones provided on the command line
will be used. Note that the config file must only contain the long form
--info-text arg (=#%frame (%fps fps) exp %exp ag %ag dg %dg)
Sets the information string on the titlebar. Available values:
%frame (frame number)
%exp (shutter speed)
%ag (analogue gain)
%dg (digital gain)
%rg (red colour gain)
%bg (blue colour gain)
%focus (focus FoM value)
%aelock (AE locked status)
--width arg (=0) Set the output image width (0 = use default value)
--height arg (=0) Set the output image height (0 = use default value)
-t [ --timeout ] arg (=5000) Time (in ms) for which program runs
-o [ --output ] arg Set the output file name
--post-process-file arg Set the file name for configuring the post-processing
--rawfull [=arg(=1)] (=0) Force use of full resolution raw frames
-n [ --nopreview ] [=arg(=1)] (=0) Do not show a preview window
-p [ --preview ] arg (=0,0,0,0) Set the preview window dimensions, given as x,y,width,height e.g. 0,0,640,480
-f [ --fullscreen ] [=arg(=1)] (=0) Use a fullscreen preview window
--qt-preview [=arg(=1)] (=0) Use Qt-based preview window (WARNING: causes heavy CPU load, fullscreen not
--hflip [=arg(=1)] (=0) Request a horizontal flip transform
--vflip [=arg(=1)] (=0) Request a vertical flip transform
--rotation arg (=0) Request an image rotation, 0 or 180
--roi arg (=0,0,0,0) Set region of interest (digital zoom) e.g. 0.25,0.25,0.5,0.5
--shutter arg (=0) Set a fixed shutter speed in microseconds
--analoggain arg (=0) Set a fixed gain value (synonym for 'gain' option)
--gain arg Set a fixed gain value
--metering arg (=centre) Set the metering mode (centre, spot, average, custom)
--exposure arg (=normal) Set the exposure mode (normal, sport)
--ev arg (=0) Set the EV exposure compensation, where 0 = no change
--awb arg (=auto) Set the AWB mode (auto, incandescent, tungsten, fluorescent, indoor, daylight,
--awbgains arg (=0,0) Set explict red and blue gains (disable the automatic AWB algorithm)
--flush [=arg(=1)] (=0) Flush output data as soon as possible
--wrap arg (=0) When writing multiple output files, reset the counter when it reaches this
--brightness arg (=0) Adjust the brightness of the output images, in the range -1.0 to 1.0
--contrast arg (=1) Adjust the contrast of the output image, where 1.0 = normal contrast
--saturation arg (=1) Adjust the colour saturation of the output, where 1.0 = normal and 0.0 =
--sharpness arg (=1) Adjust the sharpness of the output image, where 1.0 = normal sharpening
--framerate arg (=30) Set the fixed framerate for preview and video modes
--denoise arg (=auto) Sets the Denoise operating mode: auto, off, cdn_off, cdn_fast, cdn_hq
--viewfinder-width arg (=0) Width of viewfinder frames from the camera (distinct from the preview window
--viewfinder-height arg (=0) Height of viewfinder frames from the camera (distinct from the preview window
--tuning-file arg (=-) Name of camera tuning file to use, omit this option for libcamera default
--lores-width arg (=0) Width of low resolution frames (use 0 to omit low resolution stream
--lores-height arg (=0) Height of low resolution frames (use 0 to omit low resolution stream
--mode arg Camera mode as W:H:bit-depth:packing, where packing is P (packed) or U
--viewfinder-mode arg Camera mode for preview as W:H:bit-depth:packing, where packing is P (packed)
or U (unpacked)
--autofocus [=arg(=1)] (=0) Trigger Autofocus once.
--continue-autofocus [=arg(=1)] (=0) Enable continue autofocus.
-b [ --bitrate ] arg (=0) Set the video bitrate for encoding, in bits/second (h264 only)
--profile arg Set the encoding profile (h264 only)
--level arg Set the encoding level (h264 only)
-g [ --intra ] arg (=0) Set the intra frame period (h264 only)
--inline [=arg(=1)] (=0) Force PPS/SPS header with every I frame (h264 only)
--codec arg (=h264) Set the codec to use, either h264, mjpeg or yuv420
--save-pts arg Save a timestamp file with this name
-q [ --quality ] arg (=50) Set the MJPEG quality parameter (mjpeg only)
-l [ --listen ] [=arg(=1)] (=0) Listen for an incoming client network connection before sending data to the
-k [ --keypress ] [=arg(=1)] (=0) Pause or resume video recording when ENTER pressed
-s [ --signal ] [=arg(=1)] (=0) Pause or resume video recording when signal received
-i [ --initial ] arg (=record) Use 'pause' to pause the recording at startup, otherwise 'record' (the default)
--split [=arg(=1)] (=0) Create a new output file every time recording is paused and then resumed
--segment arg (=0) Break the recording into files of approximately this many milliseconds
--circular [=arg(=4)] (=0) Write output to a circular buffer of the given size (in MB) which is saved on
--frames arg (=0) Run for the exact number of frames specified. This will override any timeout
If my understanding is right, the pre-compiled libcamera-vid doesn’t support audio.
libcamera-vid is easy to use and is low CPU consumption so I prefer libcamera-vid solution.
Is there any other option for capture video and audio at same time with low CPU consumption?
( or libcamera-vid pre-compiled binary to support audio?)
I think the original author of this thread says basically the same.
Thank you for testing.
My environment might cause the problem.
I installed pulseaudio and ALSA recording so they might conflict each other.
I already gave up using libav background due to the high CPU load.
I separated recoding video and audio capture, libcamera-vid and arecord respectively.