Which free screen recorder should I use?

Question

Video capture

Need a free program to record video tutorials. I used CamStudio, but at the last lesson it glitched and cut out 55 seconds of sound in the middle of an hour-long video, and shifted the rest of the audio track by these 55 seconds. Normally, it was not possible to fix it. This program also has a clear problem with codecs.
I tried to find alternatives to this program, but everywhere the imposition of a paid version. It is necessary that there is no limit on the length of the lesson, there is an avi format, there are no watermarks with advertisements before and after the video.
Help me please.

Answer 1

set up ffmpeg
completely free, it works great, you can set up anything you want, just deal with the console command once.
I do this:
ffmpeg.exe -rtbufsize 2000M -f dshow -i video="screen-capture-recorder":audio="virtual-audio-capturer" -framerate 5 -vcodec libx264 -video_size 1920x1200 -pix_fmt yuv420p -acodec libvorbis - async 5 -y -threads 2 -audio_buffer_size 5000 c:\output.mkv
the only thing you need to make screen-capture-recorder work for you, google what you need for this
ps yes, you can use not .mkv but whatever container you want.

Answer 2

You can look in the direction of obs, it is free, but not really for recording video tutorials. And by the way, I'm not sure about avi, it's most likely mp4.

Answer 3

www.fraps.com (Full version price: $37)
Software that has never failed.
Here - the best (paid and free).