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• Trouble with CoCCA Registry

  7 octobre 2012, par Multimedia Mike — General

  I’ve been rather despondent all week. People who see me daily could readily identify this fact. Unfortunately, the exact reason was difficult to adequately explain. The problems that nerds deal with…

  When A Domain Expires
  As a few people noticed, the multimedia.cx domain and all of it’s subdomains didn’t work this last week. The problem started on Monday, October 1. Whose fault ? Well, fundamentally, I neglected to renew the domain name in time. However, I prefer to place the blame on the .cx domain registrar, CoCCA Registry. You see, they have never developed the technology to email a domain holder with a notice that their domain is about to expire or has already expired.

  This domain is the only one I have ever held so I don’t have a lot of experience in this matter. I wondered if I was crazy for thinking it would be normal for a registrar to send an email or 2 with status updates about your domain. I get the impression from speaking with others that this is indeed normal. I have 3 different email addresses listed under my account at the registrar– 2 at multimedia.cx and a backup gmail account. I checked spam folders after this incident. Then I remembered that I have never received any email notifications from them (although password reset emails show up, so that part thankfully works). Also, their support emails are black holes.

  So, I guess the moral is : be wary of dealing with CoCCA Registry. However, they seem to be the only way to register domains under a wide variety of uncommon country codes.

  By Friday, the domain appeared to have been reinstated, even through the status was officially listed as “renewal-pending” according to the web-based management console. Eventually, as cached DNS results started to time out throughout the day, I started seeing subdomains come back. I excitedly used the ‘dig’ command to count down the seconds until gamemusic.multimedia.cx was accessible on the network I was on (the number after the domain name is the time-to-live or ‘TTL’ value) :

  $ dig +nocmd gamemusic.multimedia.cx +noall +answer
  gamemusic.multimedia.cx. 3      IN      A       174.143.152.251
  $ dig +nocmd gamemusic.multimedia.cx +noall +answer
  gamemusic.multimedia.cx. 2      IN      A       174.143.152.251
  $ dig +nocmd gamemusic.multimedia.cx +noall +answer
  gamemusic.multimedia.cx. 1      IN      A       174.143.152.251
  $ dig +nocmd gamemusic.multimedia.cx +noall +answer
  gamemusic.multimedia.cx. 12962  IN      A       207.45.186.114
  

  Finally, today (Saturday), I received a receipt confirming that the domain has been renewed.

  8 Years Old
  Incidentally, happy eighth birthday to multimedia.cx. It was September, 2004 when I decided to branch out from a simple ISP-based web presence.

  People often ask why I went with the .cx TLD. When I decided I wanted a proper domain name 8 years ago, I found that multimedia.X was already taken for just about every TLD value of X. .cx was a notable exception and was distinctive enough (speaking of .X, though, I see that multimedia.xxx is still up for grabs as of this writing ; I imagine that would come with a whole other set of problems).

  It’s funny that tech nerds often rail against outsourcing too much — email, storage, computing power, web hosting — all to some type of cloud provider under the premise that it could easily be taken away. But this episode teaches me that even having your own domain name is no guarantee of a solid online presence.

  Meanwhile, I have taken proactive steps to avert this same situation from arising again :

  
  
  

  Barring a lack of automated emails from the registrar, I hope a Google Calendar reminder set up a month ahead of expiration will do the trick.

• Desperately looking for a RTSP server that can stream from a live source (not from a file)

  7 janvier 2020, par Joseph Matan

  I need a RTSP-server that can listen on a configured port (8554 for example), and then, for example, if I run FFmpeg with :

  ffmpeg -f v4l2 -i /dev/video0 -c:v libx264 -intra -an -f rtsp -rtsp_transport tcp rtsp://192.168.1.10:8554/test

  Then the RTSP-server will RECORD the video, and to play it, I just need to run it with :

  ffplay -i rtsp://192.168.1.10:8554/test

  I need the RTSP-server to support TCP transport and H264 video encoder and OPUS audio encoder and stream from a live-video (not from a file) + the program should be unlicensed.

  • This server works great, but don’t support OPUS.

  • Live555 support H264 and OPUS, but only streams from files (VOD).

  • I’ve have found some other servers that can stream directly from /dev/video0, but it’s also not a good solution for me.

  • Wowza and Red5Pro does answer all the above requirements, except that they are licenced programs.

  Any suggestions for a RTSP-server that support all the above requirements ?

  ---

  EDIT :

  I’ve tried Gstreamer and it looks promising, but I still didn’t success.
  However, I’m quite sure I’m on the right way (perhaps I don’t know how to use yet the pipelines).

  1. I’ve built gst-rtsp-server, version 1.13.91.
  2. Then, I ran ./test-record "( decodebin name=depay0 ! videoconvert ! rtspsink )"
  3. I ran netstat -anp and I can see clearly, the server is listening on tcp port 8554.
  4. Now it’s time to stream to server. I’ve tried it once with Gstreamer and once with FFmpeg.

  Gstreamer

  gst-launch-1.0 videotestsrc ! x264enc ! rtspclientsink location=rtsp://127.0.0.1:8554/test

  FFmpeg

  ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -c:v libx264 -qp 10 -an -f rtsp -rtsp_transport tcp rtsp://127.0.0.1:8554/test

  In both cases, I can see the RTP packets in wireshark,
  and by calling again to netstat -anp, I see :

  tcp        0      0 0.0.0.0:8554            0.0.0.0:*               LISTEN      14386/test-record  
  
  tcp        0      0 127.0.0.1:8554          127.0.0.1:46754         ESTABLISHED 14386/test-record  
  
  tcp        0      0 127.0.0.1:46754         127.0.0.1:8554          ESTABLISHED 19479/ffmpeg  

  So I can surly understand that I’m streaming (or streaming something...). However, when I’m trying to play the video, I’m getting failure (I’ve tried to play with Gstreamer, FFplay and VLC - all fails...) :

  Gstreamer

  gst-launch-1.0 rtspsrc location=rtsp://127.0.0.1:8554/test latency=300 ! decodebin ! autovideoconvert ! autovideosink
  
  
  
  Setting pipeline to PAUSED ...
  
  Pipeline is live and does not need PREROLL ...
  
  Progress: (open) Opening Stream
  
  Progress: (connect) Connecting to rtsp://127.0.0.1:8554/test
  
  Progress: (open) Retrieving server options
  
  Progress: (open) Retrieving media info
  
  ERROR: from element /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0: Could not get/set settings from/on resource.
  
  Additional debug info:
  
  gstrtspsrc.c(7507): gst_rtspsrc_retrieve_sdp (): /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0:
  
  Server can not provide an SDP.
  
  ERROR: pipeline doesn't want to preroll.
  
  Setting pipeline to PAUSED ...
  
  Setting pipeline to READY ...
  
  Setting pipeline to NULL ...
  
  Freeing pipeline ...

  FFplay

  ffplay -i rtsp://127.0.0.1:8554/test
  
  
  
  [rtsp @ 0x7fb140000b80] method DESCRIBE failed: 405 Method Not Allowed
  
  rtsp://127.0.0.1:8554/test: Server returned 4XX Client Error, but not one of 40{0,1,3,4}

  VLC

  vlc rtsp://127.0.0.1:8554/test
  
  
  
  VLC media player 3.0.8 Vetinari (revision 3.0.8-0-gf350b6b)
  
  [0000000000857f10] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
  
  Qt: Session management error: None of the authentication protocols specified are supported
  
  [00007f9fdc000ea0] live555 demux error: Failed to connect with rtsp://127.0.0.1:8554/test
  
  [00007f9fdc001d10] satip stream error: Failed to setup RTSP session

  Any ideas what I’m doing wrong ?

• Popen subprocess giving wrong ffmpeg process ID when trying to close

  28 octobre 2023, par Goku

  I'm trying to create a Video Management System application using Python and Django, that displays live camera stream and do video recording. For this, I add cameras using POST request and everything works fine.

  


  But when I am required to update a camera's details, like IP address or password, then first I delete the camera and then create a new instance with same camera name. The problem I'm facing is that the process ID of the camera (ffmpeg instance here) is not updating, e.g. if initially the process ID was 10, then it remains 10 (in terminate() function in the code) even when I re-create the camera with new details but I do get new process ID in start() function.

  


  Below is the code :

  


  import subprocess
from subprocess import Popen
import os, sys
import threading
import time
from datetime import datetime
import pytz
import os, signal


"""This class is used to create camera objects to display live stream and recordings,
    it is also used to manage recordings files by deleting them at the given time"""
class CameraStream:
    
    def __init__(self, device_name, username, password, ip_address, storage_days):

        self.cam_name = device_name
        self.username = username
        self.password = password
        self.cam_ip = ip_address
        self.storage_days = storage_days
        self.p1 = None
        self.p2 = None
        self.p1_id = None
        self.p2_id = None

        self.recordings_list = []

        folder_name = f"videos/Recordings/{self.cam_name}"
        folder_name2 = f"videos/LiveStreams/{self.cam_name}"

        if not os.path.exists(folder_name):
            os.mkdir(folder_name)
        if not os.path.exists(folder_name2):
            os.mkdir(folder_name2)

        self.directory = folder_name

        t = threading.Thread(target=self.maintain_recordings, args=())
        t.start()

        self.live_stream = f"ffmpeg -fflags nobuffer -rtsp_transport tcp -i rtsp://{self.username}:{self.password}@{self.cam_ip}:554/stream1 -copyts -vcodec copy -acodec copy -hls_flags delete_segments+append_list -f hls -hls_time 6 -hls_list_size 5 -hls_segment_type mpegts -hls_segment_filename videos/LiveStreams/{self.cam_name}/%d.ts videos/LiveStreams/{self.cam_name}/index.m3u8".split(" ")
        self.recording = f"ffmpeg -use_wallclock_as_timestamps 1 -rtsp_transport tcp -i rtsp://{self.username}:{self.password}@{self.cam_ip}:554/stream1 -vcodec copy -acodec copy -f segment -reset_timestamps 1 -segment_time 1800 -segment_format mp4 -segment_atclocktime 1 -strftime 1 videos/Recordings/{self.cam_name}/%Y%m%dT%H%M%S.mp4".split(" ")

        self.start()


    def start(self):
        self.p1 = Popen(self.live_stream)
        self.p2 = Popen(self.recording)
        # self.p1.wait()       # wait() is not letting the POST request to complete. Hence, using time.sleep() to get process id
        # self.p2.wait()
        time.sleep(2)
        self.p1_id = self.p1.pid
        self.p2_id = self.p2.pid
        print("In start func: ", self.p1_id, self.p2_id)     # gives new process ID here

    def terminate_process(self):
        print("you have awakened me!")
        try:
            try:
                print("In terminate func: ", self.p1_id, self.p2_id)    # gives older process ID here
                os.kill(int(self.p1_id), signal.SIGKILL)
                os.kill(int(self.p2_id), signal.SIGKILL)
                print("terminated by process id!")
            except:
                print("could not delete by process id!")
            try:
                self.p1.terminate()
                self.p2.terminate()
                print("terminated by terminate()")
            except:
                print("could not delete by terminate()")
            try:
                self.p1.kill()
                self.p2.kill()
                print("terminated by kill()")
            except:
                print("could not delete by kill()")
        except Exception as e:
            print("Failed to stop ffmpeg: ", e)


  


  I think I'm making a mistake when deleting the ffmpeg subprocess but can't figure out what it is. Have tried many methods to stop/kill the subprocess but I'm still facing the problem.
I believe there is a problem with the terminate_process() function.

  


  I'm deleting the object by using the del keyword, e.g. del , maybe it's keeping the object in the memory but only destroying the reference to that object.