function sendVideo(callback) {
    let time = 5; // sec
    let fps = 10;
    let filename = '/tmp/camera1.mp4';
    let codec = 'libx264'; //
    let ffmpegCommand = '-y -i '+ CAM3_URL + ' -t '+time+
      ' -f mp4 -vcodec '+codec+
      ' -pix_fmt yuv420p -s 1280:720 -b:v 1500k -vsync vfr -an -r '+fps+' '+filename;
    let ffmpeg = spawn('ffmpeg', (ffmpegCommand).split(' '), {});
    // ffmpeg.stderr.on('data', function(data){
    //     log('err', data.toString());
    // });
    ffmpeg.on('close', function(code) {
        callback(filename);
    });
}

sendVideo(function(filename){
	sendTo('telegram.0', {text: filename, caption: 'Камера'});
});