Poor quality when capturing a window

[DmitryAlt]

Hello.
When capturing a window from the screen, the quality is not very good and the text becomes blurry, although the settings are at maximum. What could be the problem?
I am attaching screenshots of the video and settings.

 

[Lawrence_SoCal]

1. See the warning about NOT recording to MP4.. don't ignore that.. auto remux to MP4 when done Recording if need be (my 11GB files take about 15 seconds to remux... then I delete the MKV).
2. Also, see the pinned post in this forum (link in my .sig) about posting your OBS Studio log when asking for help/support/assistance
3. One streams, typically, using CBR (constant bit rate), however when Recording, better route is based on quality/motion, NOT bitrate
Beware disk bandwidth and your recording rate (and impact of any security software, which may slow down available bandwidth for Disk I/O)
AMD's H.264 is NOT known for quality encoding ... that may not be helping. If you have lots of CPU cycles to spare, you might want to test with X.264 (CPU based encoding) to see the results.
4. When looking for crisp text, I found previous advise in this forum on using an non-default 'downscale filter', in my case Bicubic. Be sure to research CPU and other implications when changing that filter

https://obsproject.com/forum/threads/best-settings.140188/#post-514693 @FerretBomb comment #2
1) NEVER RECORD TO MP4 DIRECTLY, FOR ANY REASON. It is not a recording-safe format; if anything goes wrong during the recording, even for a split second, the ENTIRE recording will be corrupted and absolutely not recoverable by any means. Record to MKV, and remux to MP4 after the recording is complete from OBS' File menu, Remux Recordings.

2) Record using CQP or CRF, not CBR. CBR is only used for streaming, where the back-end infrastructure requires it. CQP/CRF are quality-target based encodes, and will use as much or as little bitrate as is needed to maintain a constant image quality. No wasting bitrate on simple/slow scenes, no choking on fast-moving or complex scenes. 22 is a good starting point. 16 will result in much larger files, but near-perfect video. 12 should only be used if you plan to edit and re-encode later, and will be VERY large. Anything lower than 12 shouldn't be used unless you know exactly why you need it, and what problems it can cause.