I'm looking for a way to capture pictures or video from my entry-level GoPro using the command line and with the camera connected via USB. There're lots tutorials of how to do it with the goPros that have Wi-Fi. Is there any way to do it like we do with webcams?
None of the GoPros support live streaming via USB. USB is primarily used for charging camera and access SD card. You simply cannot live stream from entry-level GoPro.
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I'm currently developing an app for the HoloLens 2 that needs to stream audio from a desktop PC.
The idea is to send control information (position, orientation, etc.) to a Cycling'74 Max/Msp application running on a Windows 10 computer to process audio for 3D audio playback. I now need to somehow stream the resulting sound to the Unity app running on the HoloLens. Both devices run on the same network.
At the moment I've achieved something using mrtk webrtc for unity in combination with a virtual cable as input. My issue is that this seems to be optimized for microphone use as it applies some options like noise reduction and smaller bandwidth. I can't find a way to set the options for webrtc to stream what I need (music) with better quality.
Does anyone know how to change that on mrtk webrtc or has a better solution for the audio streaming to the hololens?
WebRTC project for Mixed Reality is deprecated and it is designed for real-time communication. If your requirement is media consumption, you need other workaround solutions.
For dedicated media streaming, you can set up a DLNA server on your PC for media access.
You may also set up Samba or NFS on your PC if you need to access files in other formats.
I have a Raspberry PI model B+ and I was thinking of integrating it to Alexa Voice Service. So I was able to manage my Raspberry PI and Alexa Voice Service until the part that Alexa says hello. In order to achieve this I used also PC108 media USB external sound card. So I’m getting both input and output from my plug-in microphone or my mini jack audio output to speaker. The thing is that something is missing in order to work .What do I have to do in order to make Alexa listen ?
Thank you in advance.
At re:Invent 2016 they had a workshop on doing this. Take a look at the slides from the session and the workshop instructions. We used a simple USB microphone and sound is built into the Pi. The sample app is still being updated so it should be good to go.
This was with a Pi3 but the basics should still be the same.
You can also use PiCroft that is an image of Mycroft a open source assistant it's just burn it on a sdcard and use
https://mycroft.ai/mycroft-now-available-raspberry-pi-image/
if you want to create skills https://docs.mycroft.ai/skill.creation
I have a raspberry pi which has webrtc via uv4l2. It is awesome! I want to record the video from the camera on a server. It's your basic surveillance camera setup... central linux server with lots of storage space, remote IP cameras, etc. I've read dozens of pages and still can't figure it out. I tried all this kurento mumbo jumbo but it's all wretch an no vomit. It never gets there. What's the command to grabthe rpi video and dump it to disk? Please help!!!
UV4L already supports audio+video recording on the server (other than on the client), if you use it with Janus WebRTC. Have a look at the bottom of the Video Conference DEMO OS page for more details. At the moment, you will have to use the REST API to login into a Janus room and turn on/off the recording. The REST API is ideal if you want to control UV4L from a custom application, but there is also a panel which allows you to dynamically send REST requests to the UV4L server.
I have an HDMI source connected to a Chinese HD HDMI Encoder box. Playback to VLC on my PC works (open network stream http://192.168.0.150:80/hdmi)
Stream is NOT leaving my local network (on purpose)
I cannot get a signal to display on my Google Nexus Player or my NVidia Shield via Cumulus TV app. (The point being to integrate the feed into the Google Live Channels app) I have tried adjusting several of the settings to no avail. Should I be trying a specific format? I tried the Fiddler (didn't see anything descriptive in that tool) but still have no definitive answers. I am pretty sure this device only produces a H.264 bitstream, which works in the PC version of VLC, but I have no luck on my androidTV devices (to include VLC). I can also get playback on my android PHONE in VLC...
seeking help/ troubleshooting advice...
main stream settings are:
H.264 Level： high profile Encoding frame rate： 30[5-30]
Bitrate control：vbr Key interval： 30[5-200]
Encoded size： auto MinQp： 3[1-51] MaxQp： 32[MinQp-51]
MaxBitrate： 8000[16-12000]
Audio bitrate：192000 Audio channel：L+R
Audio Codec：AAC Resample：Disable Package：B HTTP： Enable /hdmi (begin with "/")
HTTP Port：80[1-65535] Change TS ID：Disable
transport_stream_id： 300[256-3800]pmt_start_pid： 480[256-3800]
stream_start_pid： 481[256-3800]RTSP： Disable Multicast IP： Disable
RTMP server ip： Disable ONVIF：Disable Enable
It looks like your encoder can stream three different formats:
Http - probably HLS
RTMP
RTP/RTSP
Now the question is which formats do your clients support and is the format on the above list.
You could install Fiddler on your PC (web app debugger) to verify that your streaming box actually serves HLS.
Since you know that VLC plays your stream you could try to install VLC on your Google Nexus player: https://play.google.com/store/apps/details?id=org.videolan.vlc
I would like to show the live video of a Microsoft Studio webcam with a Raspberry Pi. It should be a reading tool for my grandma.
So I tried vlc v4l2:///dev/video0 and I get always just a single picture. After that the system is frozen. You can just plug the power supply out.
I don't know what I'm doing wrong? I also tried a smaller resolution.