When comparing OBS vs Flameshot, the Slant community recommends OBS for most people. In the question“What are the best screen capture tools for Windows?” OBS is ranked 8th while Flameshot is ranked 14th. The most important reason people chose OBS is:
You can record videos in formats such as mp4, flv, mkv, and more. You also have control over the bitrate used.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Records to many popular formats
You can record videos in formats such as mp4, flv, mkv, and more. You also have control over the bitrate used.
Pro Free and open source
No subscriptions or payments or licenses.
Pro Available for Linux, Mac, Windows
Pro Live streams
Can be used to stream.
Pro Fast
From the website: "GPU-based game capture for high performance game streaming."
Pro Extendable
OBS has an API allowing developers to create their own unique plugins, giving them and others complete control of their streaming experience.
Pro Encoding using H264 (x264) and AAC and file output to MP4 or FLV
Pro Unlimited number of scenes and sources
Pro Pin tool
Pin screenshots on screen so that you won't have to scroll up and down to find something in a long document all the time.
Pro Edit and copy on the fly
Write texts, draw rectangles, circles, and arrows on a screenshot and copy all on the fly or save the edited picture to disk. You can change colors, sizes and widths of all the elements the tool provides.
Pro Upload to Imgur
Take a screenshot and upload to Imgur with a click.
Cons
Con Recording a window will not record the menu bar, popup menus or child dialogs
Con Overkill for simple projects
Plus the interface is a bit intimidating.
Con Needs tutorial to get started
Otherwise it's hard to find out how to record a screen or window.
Con No delay for area shot
It can not add a delay for an area shoot.