No picture and sound from TV

[Grzegorz K]

I have a problem with configuring OBS for capturing picture from a TV screen. I plugged a noname grabber into my LG Smart TV through an HDMI cable, as it should be done. I added a video capture device (USB3.0 Capture). With these thing done, I see nothing in a preview and a recording contains no picture and sound. Instead, I see following lines being repeated multiple times in a log file:

18:57:55.679: warning: Found EOI before any SOF, ignoring
18:57:55.679: fatal: No JPEG data found in image
18:57:55.679: Urządzenie do przechwytywania wideo: Error decoding video

"Urządzenie do przechwytywania wideo" is a video capture device's name in my configuration. The grabber is recognized by the system.
The device's settings:

video device: USB3.0 Capture
video path: \\?\usb#vid_534d&pid_2109&mi_00#6&e84bd57&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global
resolution: 1920x1080
flip: 0
fps: 50.00 (interval: 200000)
format: MJPEG
buffering: enabled
hardware decode: disabled
using video device audio: no
separate audio filter
sample rate: 44100
channels: 2
audio type: Capture

So the standard question: what's wrong? Did I forgot something important in my config? Sorry, I may not know enough about using OBS.