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by Serveurperso
Tue Jun 11, 2019 6:32 am
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

No, there is always a bug, image quality is better with raspivid and mode2 even all @ 15 FPS...
Always need a force sensor mode in v4l2
by Serveurperso
Mon Jun 10, 2019 9:04 pm
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

I deleted my previous post it's a mistake ! I tested @ 15 FPS on v4l2 the heuristic select the correct mode 2. If I force mode 2 raspivid ignore the 30FPS parameter ! and result a 2* acceleration on my raspivid version this completely fooled me!!!! They say 42 FPS for 1296x972 on v1 sensor, this foo...
by Serveurperso
Thu Jun 06, 2019 7:10 am
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

With raspivid and "-md 2" to force mode 2 on 1296x972 30FPS it's good ! Here is the result : https://www.serveurperso.com/temp/6by9/raspivid-1296x972-30-md2.mp4 GoodSensorMode2.jpg ------------------------ Versus the bad automatic mode from V4L2 https://www.serveurperso.com/temp/6by9/raspivid-1296x9...
by Serveurperso
Thu Jun 06, 2019 6:43 am
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

This is not a V4L2 itself problem it's kernel/driver bug When I do a h264 1296x972 video with Raspivid I get exactly the same bad quality:( For sure it's not a 1296x972 native pixel-to-pixel... raspivid -o raspivid-1296x972-30.h264 -w 1296 -h 972 -fps 30 -b 1500000 -t 10000 -rot 180 Raw result : htt...
by Serveurperso
Wed May 29, 2019 8:05 am
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

vcdbg log msg There is segfault I think inside the vcdbg command itself, and not inside the log Because this segfault don't appear without the high verbose level. I get : 145046.358: camplus_isp_callback [0]: input_lines_consumed=424, num=444, isp_lines_done=444, flags=1 It's very strange, 424x444 ...
by Serveurperso
Wed May 22, 2019 6:24 am
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

FYI Increase of the the max_video_[width|height] parameters + reboot + testing with, or without this confuguration have NO impact on this test, it's, strange. Result from "v4l2-ctl -V -P" @ my best interesting resolution = 1296 x 972 (root|~) v4l2-ctl -V -P Format Video Capture: Width/Height : 1296/...
by Serveurperso
Tue May 21, 2019 1:55 pm
Forum: Camera board
Topic: Official V4L2 driver
Replies: 558
Views: 467768

Re: Official V4L2 driver

Hello, I use V4L2 API to get low latency H.264 30FPS stream - PI 2/3/3B+ and the V1 Sensor module - for a fleet of robots with a total success. (you can test them online at domain "vigibot.com" there is NO ads.) V4L2 is very cool because I can set the bitrate on the fly to keep the latency very low ...

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