ffvideo
spotprice
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ffvideo
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Ask HN: What apps have you created for your own use?
I wrote an optimized C++ FFMPEG player as a video surveillance system, initially to watch my pets in my yard, and then kept going adding (human) face detection, and then a DL/ML training scaffold, then Live555 re-encoding, then an embedded web browser, then I added tons of comments and turned it into a learning demo project. It's on Github, I still use it to watch my pets: https://github.com/bsenftner/ffvideo
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Looking for a VMS and some doubts
Are your camera's ONVIF compatible? You can confirm this by running this free open source software: https://sourceforge.net/projects/onvifdm/ If your cameras appear in this software, then they are ONVIF compatible. If they are, then you can use my free and open source windows video player to view as many stream as you want: https://github.com/bsenftner/ffvideo This player is CPU efficient, intended for use when training video based machine learning models, so it leaves processor available for machine training. Used as a pure video player, I've had 32 video windows playing at 30 fps simultaneously using it on an i9 3.2 Ghz workstation.
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[Question] I'm running facial recognition code however the video and the detection is extremely slow. Is there a way to reduce the lag of the video
In my ffmpeg playback library, be aware it is optimized for computer vision; therefore any audio is ignored and if playing from a file any timing information is ignored as well. When playing real time streams, such as from an IP camera or USB camera that playback is as close to real time as possible. I seem to remember something like under 20 ms per frame latency. However, IP video services expect timing information to be honored, and because mine ignores timing a YouTube video will fly by a few hundred frames per second. Likewise, playing from a local stored video file will playback as fast as your drive delivers frames. It was designed this way to minimize overhead and delay when training algorithms with video. Here's the essential source to the playback lib: https://github.com/bsenftner/ffvideo/tree/master/ffvideolib_src
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Anyone have experience using modern OpenGL w/ wxWidgets?
Okay, thanks to u/bsenftner I was able to figure this out by looking at his Github repository. Essentially, if you want to use a specific version of OpenGL with wxGLCanvas you have to specify the major and minor versions in the attribute list passed to the constructor of wxGLCanvas.
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Parallel programming for computer vision applications
If you take a look at my ffvideo github project (linked in my reply above) you can search for instances of std::thread and see they are fairly self contained, with logical data fencing protecting data shared between threads. Here's an example: a video frame exporter that runs in it's own thread, enabled when the end-user wants video frames written to disk: https://github.com/bsenftner/ffvideo/blob/aed42b5a3e856e24b030e71f6d92bcbabf5d6829/ffvideolib_src/ffvideo_frameExporter.h
- USB camera feed lagging when used with openCV
- Ways to create GUI for computer vision software
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RTSP program
Try this: https://github.com/bsenftner/ffvideo
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Video + bounding box coupled stream transmission
I do this in C++ here: https://github.com/bsenftner/ffvideo I think I'm using DLib rather than OpenCV, but at this level the difference between the two is negligible.
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Doable? Cropping and alignment of photo set based on facial landmarks
I have some code doing this in an open source C++ project here: https://github.com/bsenftner/ffvideo Towards the bottom of the README on that page you'll see an image titled "demonstrating tilted head registration" describing what you're trying to do here.
spotprice
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Ask HN: What apps have you created for your own use?
All of mine are CLI...
https://github.com/jftuga/less-Windows - [not really mine, but I just help maintain the port] - GNU less compiled for Windows 10 & 11. Stand-alone version with no dependencies.
https://github.com/jftuga/gofwd - A cross-platform TCP port forwarder with Duo 2FA and Geo-IP integration
https://github.com/jftuga/spotprice - Quickly get AWS spot instance pricing - a bit easier to use than the aws cli; is also faster and has more features
https://github.com/jftuga/tcpscan - A standalone, fast, simple, multi-threaded cross-platform IPv4 TCP port scanner
https://github.com/jftuga/ipinfo - Return IP address info including geographic location and distance when given IP address, email address, host name or URL
https://github.com/jftuga/photo_id_resizer - Resize photo ID images using face recognition technology
https://github.com/jftuga/chars - Determine the end-of-line format, tabs, bom, and nul characters
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How to find regions where p4d.24xlarge instances are available?
I wrote a program to quickly and easily get AWS EC2 spot price. Here is the output:
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Leveraging Mispriced AWS Spot Instances
I wrote a program to get AWS spot instance pricing. This program is similar to using "aws ec2 describe-spot-price-history" but is faster and has a few more options.
https://github.com/jftuga/spotprice
- AWS EC2 Spot Instances Availability by Region
- Common avenues for reducing waste in AWS (Specifically EC2)
- Ask HN: What are some tools / libraries you built yourself?
What are some alternatives?
nicegui - Create web-based user interfaces with Python. The nice way.
lowdefy - The config web stack for business apps - build internal tools, client portals, web apps, admin panels, dashboards, web sites, and CRUD apps with YAML or JSON.
msdfgen - Multi-channel signed distance field generator
terraform_ec2_spot_instance - Use terraform to create an AWS EC2 spot instance
Dlib - A toolkit for making real world machine learning and data analysis applications in C++
rupy - HTTP App. Server and JSON DB - Shared Parallel (Atomic) & Distributed
ffmpeg_shadertoy_filter
yadm - Yet Another Dotfiles Manager
miniCMS - A document and content managment system for small businesses
sqldb-logger - A logger for Go SQL database driver without modifying existing *sql.DB stdlib usage.
fastAPI_TDD_Docker - A simple secure blog & basic CMS built with Python FastAPI, JWT, Postgres, TDD & Docker
Tabula - Extract tables from PDF files