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• FFmpeg command isn't working on Samsung

  30 avril 2016, par user4204805

  I have added the FFmpeg library to my android project.

  I am using the following code to slice my video using FFmpeg :

  String[] complexCommand = {"ffmpeg","-i",input.mp4,"-vf","crop="+surfaceWidth+":"+surfaceHeight+":"+surfaceStartX+":"+surfaceStartY,"-threads","5","-preset","ultrafast","-strict" ,"-2",output.mp4};

  It gives me the following error :

  A/libc: Fatal signal 11 (SIGSEGV) at 0x000f4240 (code=1), thread 17377 (IntentService[U)

  It works on most devices except for Samsung device (just checked on samsung grand). Please help.

• Can't get FFMPEG to convert Samsung Motion Photos from .jpg to .mp4 [closed]

  27 août 2024, par welbeebee

  I pulled a bunch of Samsung Galaxy S21 Ultra motion photos to my PC (Windows 11) for video editing, but they were in .jpg, and for some reason Microsoft Clipchamp couldn't convert them to video. But, I knew the motion photos were intact, bc Microsoft Photos was showing the MOTION option and playing the videos just fine.
So, I'm in FFMPEG just throwing everything at the wall, but can only get still MP4's out of it, with none of the video.

  


  Here's the breakdown of what I'm looking at for :
ffmpeg -i input.jpg

  


  Input #0, image2, from '20240623_233601.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 874324 kb/s
  Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 2944x2208 [SAR 59:59 DAR 4:3], 25 fps, 25 tbr, 25 tbn


  


  So to get the whole folder converted, I'm trying :
for %i in (*.jpg) do ffmpeg -i "%i" -c:v libx264 -map 0:0 -preset veryslow -crf 18 "%~ni.mp4"

  


  But this just results in a bunch of those still MP4's I mentioned.

  


  I'm assuming the problem starts with that odd duration of 00:00:00.04, with a bitrate of 874324 kb/s, but I'm not sure. I don't understand this mjpeg video format very well at all.

  


  I been trying to work through this with copilot to no success, and so I'm turning to stackoverflow in case anyone can help me out.
Or am I going about this all the wrong way ? Let me know.

  


• Implementing Live Streaming Webinar Architecture - Need Guidance

  21 septembre 2023, par vishnugpl

  Question : I'm working on a project to implement a live streaming webinar platform, and I'm looking for guidance on the architecture and technologies to use. I have some specific requirements and constraints, and I'd appreciate any advice or pointers on how to get started.

  


  Context :
I'm tasked with building a live streaming webinar platform from scratch for our organization. Here are some key requirements and constraints :

  


  


  1. Live Video Streaming : We need to support live video streaming for
webinars, workshops, and conferences. Low latency is crucial for
real-time interaction between presenters and attendees.

     


  


  2. Scalability : The platform should be able to handle a large number of concurrent attendees, potentially thousands or more,
without compromising performance.

     


  


  3. Security : Security is a top priority. We need to ensure that only authorized users can access the webinars, and we must protect
against unauthorized recording or distribution of the content.

     


  


  4. User Interaction : Attendees should be able to ask questions, participate in polls, and interact with presenters in real-time.

     


  


  5. Recording and Playback : We also want to provide recorded versions of past webinars for on-demand viewing (HLS).

     


  


  


  Current Tech Stack :

  


  

  • Frontend : React

  


  • Backend : Node.js with Express

  


  • Database : MongoDB

  


  • Cloud Hosting : AWS

  


  


  Questions :

  


  


  • What technologies or services are best suited for handling live video streaming with low latency ?

    


  


  • How can I ensure scalability in terms of both video streaming and handling a large number of users ?

    


  


  • What security measures should I consider to protect the content and user data ?

    


  


  • Are there any recommended frameworks or libraries for building interactive features like real-time chat and polling ?

    


  


  • What's the best approach for recording and serving on-demand webinar content ?

    


  


  


  Additional Information :

  


  


  • Budget is a consideration, so cost-effective solutions are preferred.

    


  


  • Any open-source or third-party tools that can simplify development are welcome.

    


  


  • I have experience with AWS, but I'm open to other cloud providers if they offer advantages for this project.