rtsp streaming / broadcasting

[eravion]

Hello,

Today camera "expose" a RTSP stream, could it be possible to add a feature so stream/broadcast RTSP from the camera? More or less what we can do with a raspberry and ffmpeg : ffmpeg -f v4l2 -i /dev/video0 -c:v h264_omx -preset medium -tune zerolatency -b:v 500k -f rtsp rtsp://output-url

Where rtsp://output-url is targeting a server listening for RTSP incoming stream (like https://github.com/bluenviron/mediamtx).

Thanks.

[roleoroleo]

With the current code is not possible. And I don't know if live555 library (the library I'm using) is able to implement this scenario.

[eravion]

I asked to ChatGPT, it propose the following code.

#include <liveMedia/liveMedia.hh>
#include <liveMedia/RTSPClient.hh>
#include <liveMedia/BasicUsageEnvironment.hh>
#include <liveMedia/H264VideoRTPSink.hh>
#include <liveMedia/MediaSession.hh>

int main(int argc, char** argv) {
    TaskScheduler* scheduler = BasicTaskScheduler::createNew();
    UsageEnvironment* env = BasicUsageEnvironment::createNew(*scheduler);

    RTSPClient* rtspClient = RTSPClient::createNew(*env, "rtsp://129.180.1.1:554/my_channel", 0, nullptr, 0);

    MediaSession* mediaSession = MediaSession::createNew(*env, "my_channel", "Stream from my_channel", "Session description");
    H264VideoRTPSink* videoSink = H264VideoRTPSink::createNew(*env, rtspClient->createNewStream(0), 96); // 96 is the RTP payload format

    mediaSession->addSubsession(videoSink);
    mediaSession->initiate();

    env->taskScheduler().doEventLoop(); // Start streaming

    // Cleanup
    delete rtspClient;
    delete scheduler;
    return 0;
}

No idea if it is working or not ...

[roleoroleo]

This code is not clear to me.

[eravion]

the full exchange here : https://chat.openai.com/share/4e645b57-1967-449e-a09a-05e9b542dcb3 Does it help?

[roleoroleo]

Broadcasting RTSP using the Live555 library involves setting up a server to stream the content and making it accessible to clients.

I think it's not exaclty what you are looking for. You want to send the stream to a server, or I'm wong?!?

[eravion]

yes, that's what the ffmpeg command is doing ffmpeg -f v4l2 -i /dev/video0 -c:v h264_omx -preset medium -tune zerolatency -b:v 500k -f rtsp rtsp://output-url Send the stream to the destination "output-url" using "rtsp" protocol

[eravion]

another option is to use ffmpeg on the camera. A compatible version is available here : https://johnvansickle.com/ffmpeg/ both armhf and armel are worming fine.

[roleoroleo]

Did you try it on the cam? Is the cpu enough to run ffmpeg?

[eravion]

Yes, it is working fine :

I wrote a simple script that I lunch manually in order to restart ffmpeg in case of. But I don't know to start it at camera startup and if it is possible to add it in the web UI ?

#!/bin/bash

STREAM_URL=$1
# rtsp://127.0.0.1/ch0_0.h264
STREAM_NAME=$2
# my_camera_name
DESTINATION=$3
# ip or fqdn of destination 

while true; do
# need an IP for ffmpeg, DNS resolution issue
    IP_RTSP=`ping -c 1 ${DESTINATION} | grep ${DESTINATION} | awk '{ print $3}' | sed 's/(//' | sed 's/)://' | sed 's/)//' | grep -v ping`
    ffmpeg -i ${STREAM_URL} -c:v copy -c:a copy -rtsp_transport tcp -f rtsp rtsp://${IP_RTSP}/${STREAM_NAME}
    if [ $? -eq 0 ]; then
        echo "FFmpeg ended."
        break
    else
        echo "FFmpeg crash, restart in progress..."
        sleep 5
    fi
done

[Giuserver]

with a ngnix server on camera, we can see also the video via browser eventually!

[roleoroleo]

You can use startup.sh file, it's the last script executed by system.sh.

You can also try this ffmpeg: https://github.com/roleoroleo/yi-hack-utils/tree/main/Allwinner-v2 It's partially static (no libraries but built with the proper libc).

[eravion]

Yes, it is ok with this version It is using less memory and less CPU.

Good point

Next step having an automatic startup or a startup managed by the UI

[eravion]

@eravion

Great work 🔥 Can you try to .m3u8 ? so, we can see the video streaming directly on bowser.

like that: ffmpeg -rtsp_transport tcp -i "rtsp://127.0.0.1/ch0_0.h264" -y -tune zerolatency -x264-params keyint=3 -hls_time 3 -hls_list_size 3 -start_number 1 camera.m3u8

Hello @Giuserver I tried the 3 binaries of ffmpeg. For the two coming from https://johnvansickle.com/ffmpeg/, the result is NOK. The camera hang once ffmpeg started. No file in the folder, no access to the camera ssh/http. Power cycle to have it back.

With the binary from https://github.com/roleoroleo/yi-hack-utils/tree/main/Allwinner-v2 It failed with this error :

Unrecognized option 'tune'.

Not sure this device is strong enough.

[roleoroleo]

I'm building the new version of ffmpeg. I will share it asap. In the meantime I also compiled live555HLSProxy to create an hls video. If you are interested I can share it.

[roleoroleo]

This is the www folder with all new js to play the hls video: www.tar.gz Overwrite your /tmp/sd/yi-hack/www (after a backup).

This is the hls proxy: live555HLSProxy.gz

mkdir /tmp/live
mkdir /tmp/sd/yi-hack/www/live
mount --bind /tmp/live /tmp/sd/yi-hack/www/live
cd /tmp
live555HLSProxy rtsp://127.0.0.1/ch0_0.h264 live

At the moment live555HLSProxy is built with just 2 segment 5 seconds long. Maybe it's not enough.

http://IP-CAM?page=video

I'm not a good js programmer, so it's not perfect.

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