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• FFMPEG and FFPlay can access rtsp stream from one ip, but from other ip, it can't

  28 mai 2022, par Crear

  The situation is kind of complex. I was archiving several CCTV camera feeds (rtsp, h264, no audio) through OpenCV, which worked but the CPU utilization was too high and started to lose some frames time by time.

  


  To reduce the CPU utilization, I started to use FFMPEG to skip the decoding and encoding processes, which worked perfectly on my home machine. However, when I connected to my university VPN and tried to deploy it on our lab server, FFmpeg couldn't read any frame, ffplay couldn't get anything either. However, OpenCV, VLC Player and IINA Player could still read and display the feed.

  


  In Summary,

  


  1 FFMPEG/ffplay

  


  1.1 can only read the feed from my home network(Wi-Fi, optimum)

  


  1.2 from other two networks, the error message says : "Could not find codec parameters for stream 0 (Video : h264, none) : unspecified size
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options"

  


  2 IINA/VLC Player, OpenCV
These tools can get the video all the time.

  


  I'm wondering whether it's related to some specific port access, that the ffmpeg required but the others don't. I'd appreciate it if anyone can provide any suggestions.

  


  As references, the tested ffplay command is simple :

  


  ffplay 'the rtsp address'


  


  Thanks

  


  ---

  


  Update

  


  More tests have been performed.

  


  By specifying rtsp_transport as TCP, ffplay can play the video, but FFmpeg can't access the video. (In the beginning, when both FFmpeg and ffplay worked through my home network, it was UDP)
The FFmpeg command is as follows :

  


  ffmpeg -i rtsp://the_ip_address/axis-media/media.amp -hide_banner -c:v copy -s 1920x1080 -segment_time 00:30:00 -f segment -strftime 1 -reset_timestamps 1 -rtsp_transport tcp "%Y-%m-%d-%H-%M-%S_Test.mp4"


  


  Please help...

  


• Analytics for ePortfolios, Mahara hui conference

  20 mars 2014, par Matthieu Aubry — Community, Meta

  I was privileged to present at the Mahara Hui conference in Wellington, New Zealand.

  Here are the slides of my presentation “Analytics for ePortfolios” :

  Summary : by using an analytics tool that integrates well with Mahara, such as Piwik, Mahara users can benefit from a multitude of insightful analytics reports.

  Learn more

  Mahara is a web application to build your electronic portfolio. You can create journals, upload files, embed social media resources from the web and collaborate with other users in groups. Mahara is a popular open source project built by a passionate community, and used in universities, schools and companies all over the world.

  Mahara Hui is the first kiwi conference on Mahara, the open source ePortfolio system, in New Zealand. This 2-day conference was held at Te Papa in Wellington from 19 to 20 March 2014 (schedule)

  Next steps

  I’m excited to join the Mahara team at the Mahara Hui Hackfest organised today at Catalyst IT offices. We will brainstorm how to integrate Piwik beautifully within Mahara, and how to ultimately provide students and employees useful analytics on all the content they create !

• Analytics for ePortfolios, Mahara hui conference

  20 mars 2014, par Matthieu Aubry — Community, Meta

  I was privileged to present at the Mahara Hui conference in Wellington, New Zealand.

  Here are the slides of my presentation “Analytics for ePortfolios” :

  Summary : by using an analytics tool that integrates well with Mahara, such as Piwik, Mahara users can benefit from a multitude of insightful analytics reports.

  Learn more

  Mahara is a web application to build your electronic portfolio. You can create journals, upload files, embed social media resources from the web and collaborate with other users in groups. Mahara is a popular open source project built by a passionate community, and used in universities, schools and companies all over the world.

  Mahara Hui is the first kiwi conference on Mahara, the open source ePortfolio system, in New Zealand. This 2-day conference was held at Te Papa in Wellington from 19 to 20 March 2014 (schedule)

  Next steps

  I’m excited to join the Mahara team at the Mahara Hui Hackfest organised today at Catalyst IT offices. We will brainstorm how to integrate Piwik beautifully within Mahara, and how to ultimately provide students and employees useful analytics on all the content they create !