Change H264 settings with parameter using recording tool+library

Autonomous Vehicles DRIVE PX 2 General
1

Hello!
I’m trying to change the h264 settings with the parameters given for the recording library used by the recording-qt - tool.
Actually after encoding and decoding the image quality is really bad. So e.g. the calibration is not good enough for objects far away. Is there a possibility to change a parameter which changes the compression quality of the h264 stream like only saving I-frames instead of saving I-/P- and B- Frames?

2

Hi randtie,
Can you share the command you use now?

3

We did not solve this problem until now.

4

Hi randtie,
Still need your help to give your steps of recording h264 stream. We need more information to check further.

5

Hey DaneLLL,

we are using the following configuration for recording the h264 with the recorder file:

"camera": {
        "separate-thread": true,
        "record-thread-priority": 0,
        "write-file-pattern": "video_*",
        "sensors": [
            {
                "protocol": "camera.gmsl",
                "params": "camera-type=ar0231-rccb-bae,csi-port=ab,camera-count=4,selector-mask=1111,output-format=h264,async-record=0,fifo-size=12,bitrate=200000000,framerate=30,cross-csi-sync=1,frame-record-count=1,frame-skip-count=1",
                "channel-names": [
                    "vorne_mitte",
                    "vorne_links_oben",
                    "vorne_links_unten",
                    "hinten_links"
                ]
            }
        ]
    }

The same parameters were used with the command line. This gives me a h264 file with two reference frames but actually we need no compression at all to study the loss of image compression.
Thanks a lot for your help.

6

Hi randtie,
Configuring all I frames is not supported. The interfaces we have are to set bit rate and frame rate.