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• Capture & save MJPG CCTV stream to file w. FFMPEG

  21 juin 2021, par GBano

  I've been trying to record an IP-cam stream (Foscam, mjpg) via http with ffmpeg.
Can't get the rtsp stream for some reason, but the http/mjpg works fine (VLC IDed it as mjpg).

  


  The stream URL looks like this :
http://192.168.1.123:456/videostream.cgi?user=USERNAME&pwd=PWD

  


  So I created the string (w.o line wrap) :
ffmpeg -i -loglevel debug http://192.168.1.123:456/videostream.cgi?user=USERNAME&pwd=PWD /home/user/Videos/camera.mp4

  


  Some examples I saw are using -c copy and map 0 options as well but I left this out since I defined source and destination clearly and this is just a video, no audio.
segment_time and segment_format I also left out for now (I'd like segments later though- when it's working).

  


  FFMPEG returns : "bash: /home/user/Videos/camera.mp4: No such file or directory"

  


  So I tried a random mjpg stream from the net (Insecam is a nice source for this...) : http://58.69.178.54:80/mjpg/video.mjpg

  


  Leading to :
ffmpeg copy -i -loglevel debug -hide_banner http://58.69.178.54:80/mjpg/video.mjpg /home/user/Videos/camera.mp4

  


  Returns : -loglevel: "No such file or directory" (the same with segment options included, copy excluded).

  


  Shouldn't FFMPEG create the destination file ?

  


  One example mixed FFMPEG with CVLC (Save continuous RTSP stream to 5-10 minute long mp4 files) so I just tried with cvlc.
cvlc http://58.69.178.54:80/mjpg/video.mjpg copy /home/user/Videos/camera.mp4
This opens the stream in a VLC window (despite that I use Cvlc) but does not create a destination file.

  


  I suspect I must have missed something simple & silly, but what ?

  


• ffmpeg - RTSP stream with no audio to html5 video tag over mp4 fragmented stream

  17 mai 2021, par Play_it

  I am already trying to make a live video feed on my website and found this code but it does not work as nicely as i wanted to. I modified the code a bit to just process the video feed and not the screenshots.

  


  I have stuttering and also lags where the video continues playing but the video does not update.

  


  This is my mod :

  


  if(isset($_GET["type"]) && !empty($_GET["type"])) {
    header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
    header("Cache-Control: post-check=0, pre-check=0", false);
    header("Pragma: no-cache");
    header("Accept-Ranges: bytes");
    header("Connection: keep-alive");

    $rtsp = "rtsp://[some ip]:554/some/path";

    $ffmpeg_base = "ffmpeg -rtsp_transport tcp -probesize 32 -stimeout 5000000 -i \"{$rtsp}\" -loglevel quiet";
    $duration_limit = 600;
    $def_rate = 6;

    $type = $_GET["type"];
    switch($_GET["type"]) {
        case "mjpeg":
            $Ct = "multipart/x-mixed-replace;boundary=mjpegboundery";
            $ffmpeg_params = "-b:v 512k -s 426x240 -r 2";
            break;
        case "mp4":
            $Ct = "video/mp4";
            $ffmpeg_params = "-c copy -an -movflags +frag_keyframe+separate_moof+omit_tfhd_offset+empty_moov";
            break;
        case "webm":
            $Ct = "video/webm";
            $ffmpeg_params = "-c:v vp8 -b:v 256k -an -s 426x240 -r {$def_rate}";
            break;
        case "ogg":
            $Ct = "video/ogg";
            $ffmpeg_params = " -c:v libtheora -b:v 256k -an -s 426x240 -r {$def_rate}";
            break;
        default:
            exit;
    }
    header("Content-type: $Ct");
    passthru("{$ffmpeg_base} -t {$duration_limit} {$ffmpeg_params} -f $type pipe:");
}


  


  I dont know much about ffmpeg and have some difficulties to set the stream up.

  


  My approch would be to decode the stream and encode it as mp4 fragmented. Maybe you have a better and different solution ?

  


• ffmpeg volume levels

  14 avril 2021, par josh joyer

  I AM USING WINDOWS

  


  I did recording camera,microphone and system sounds each separately with ffmpeg.

  


  ffmpeg -f dshow -i video="USB2.0 PC CAMERA" output.mkv


  


  Above code for camera recording.

  


  ffmpeg -f dshow -i audio="@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{5B4DB0B5-B645-4AFA-930D-4710AAF753DB}" output.wav


  


  And above for microphone.

  


  ffmpeg -f dshow -i audio="@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{ADECEC1D-C3CC-4BAE-8516-752251B8B63F}" output.mkv


  


  And above for system audio.

  


  I mixed system audio with microphone like below :

  


  ffmpeg -f dshow -i audio="@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{5B4DB0B5-B645-4AFA-930D-4710AAF753DB}" -f dshow -i audio="@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{ADECEC1D-C3CC-4BAE-8516-752251B8B63F}" -filter_complex amerge=inputs=2 stream.mp3


  


  BUT there is still issue to volume levels. How do I adjust sound volume levels
for each input or output file ?