alizx 发表的帖子

alizx · 全志 SOC

@哇酷小二
a) I get a snapshot with v3s from usb camera and I checked it on my pc. it's ok
b) I show an image on this LCD but it is not ok. it's like output of usb cam.

alizx · 全志 SOC

哇酷小二说：

@alizx
这种情况，看起来可能 R/G/B 上面有一两根线断路或者短路了。

Thanks for your reply.
I check the hardware. there is no issue there. in addition, I tested 4.3 inch LCD (I designed a simple 54-to-40 pin converter) and there was no issue!

alizx · 全志 SOC

@微凉VeiLiang

I'm sorry if my question is basic! But how can I setup my vscode to build and compile your source code?
And in general, how can I write a program like yours and how to use other prepheral drivers? I'm new in writting bare metal for F1C100,...

and what about RT-Thread?
is there any good post in whycan forum that explains these simple and good?

Thanks very much

alizx · 全志 SOC

I started using V3S with implement USB camera on it.
I used Yokto to make the linux image and I added usb video class and ffmpeg to it.
after some weeks at last I get the video.
Because I wanted to have a smooth video I could not get better resoloution of 320x240 from camera. on higher qualities, I has delay in video.

video (LCD Resoloution: 480x272 - but input resoloution from camera is 320x240)
https://whycan.com/files/members/11174/VID_20230118_194215.mp4

after that, I designed a PCB for it and I used 54 pin FPC connector for 3.5 inch LCD.

But after assemble the hardware, the colors on picture was not correct. It is like a burned picture!
I'm sure that my board has not problem (because I made a 54-to-40 pin converter and I still have a good output on 4.3inch LCD!)

3.5inch output

Designed Board

I'm still working on it. but I could not get the problem!

alizx · 全志 SOC

muzhi 说：

One more question, have you tried using the -n, -t or -d options in yavta to adjust the number of video buffers, the delay before requeuing buffers and the time per frame?

do you live in China? Can I have any number (whatsapp, wechat, telegram, ...) from you?
thanks

alizx · 全志 SOC

thank you so much.
yes I tried -n and -t and -d flags.
I will see your links and write feedback. thanks again

alizx · 全志 SOC

大家好。
我是嵌入式 linux 和 V3S（lichee pi 零）的新手。
我想用 v3s 显示和记录 usb 摄像头。但我没有任何起点。
有没有满足我要求的现成图像文件？
我想在 3.5" 显示器上显示 USB 摄像头并将其记录到 SD 卡（使用 h264 编码），也许我会使用 Qt 作为最终应用程序

请从我应该从哪里开始帮助我。
谢谢

alizx · 全志 SOC

thanks very much
I saw the link berfore.
Exactly there is no reliable solution for that.

I don't know.
How can I enable DMA for UVC?
Thanks

alizx · 全志 SOC

这是输出错误

root@LicheePi:~# ./yavta --capture=25 --file=out.MJPEG /dev/video0

Device /dev/video0 opened.
Device `USB Camera' on `usb-musb-hdrc.1.auto-1' (driver 'uvcvideo') supports video, capture, without mplanes.
Video format: MJPEG (47504a4d) 640x480 (stride 0) field none buffer size 614400
8 buffers requested.
length: 614400 offset: 0 timestamp type/source: mono/SoE
Buffer 0/0 mapped at address 0xb6e10000.
length: 614400 offset: 614400 timestamp type/source: mono/SoE
Buffer 1/0 mapped at address 0xb6d7a000.
length: 614400 offset: 1228800 timestamp type/source: mono/SoE
Buffer 2/0 mapped at address 0xb6ce4000.
length: 614400 offset: 1843200 timestamp type/source: mono/SoE
Buffer 3/0 mapped at address 0xb6c4e000.
length: 614400 offset: 2457600 timestamp type/source: mono/SoE
Buffer 4/0 mapped at address 0xb6bb8000.
length: 614400 offset: 3072000 timestamp type/source: mono/SoE
Buffer 5/0 mapped at address 0xb6b22000.
length: 614400 offset: 3686400 timestamp type/source: mono/SoE
Buffer 6/0 mapped at address 0xb6a8c000.
length: 614400 offset: 4300800 timestamp type/source: mono/SoE
Buffer 7/0 mapped at address 0xb69f6000.
[ 67.288909] uvcvideo: Failed to submit URB 0 (-28).
Unable to start streaming: No space left on device (28).
8 buffers released.

alizx · 全志 SOC

你好。
我想在 3.5" RGB LCD 上显示 usb 摄像头并将其记录到 SD 卡。
一开始我用的是官网现成的荔枝派图片。然后连接usb camera，但是不识别。所以我进行了搜索，最后我将设备树中 &usb_otg 的 dr_mode 更改为“主机”。
然后 USB 摄像头被识别但没有驱动程序在那里。然后我在内核配置中做了一些更改（添加 media_usb_support、V4L2、uvc）并再次编译内核。
现在 uvc 自动识别 usb 摄像头。
我得到 yavta 源代码并交叉编译它并将它添加到 sd 卡。
当我运行 yavta 捕获一些帧时，它返回了一些错误，我无法解决它。
有什么帮助吗？

有满足我要求的现成图像吗？（显示和记录 usb 摄像头）

请帮我。我处境艰难。

谢谢

WhyCan Forum(哇酷开发者社区)

#1 Re: 全志 SOC » V3S USB Camera » 2023-11-27 19:24:28

#2 Re: 全志 SOC » V3S USB Camera » 2023-11-12 16:26:10

#3 Re: 全志 SOC » 分享F1C100S的TVD源码，TVIN0接CVBS摄像头采集数据显示到LCD屏 » 2023-11-11 05:19:59

#4 全志 SOC » V3S USB Camera » 2023-11-11 05:10:06

#5 Re: 全志 SOC » 使用 V3S 进行 USB 摄像头录制 » 2023-01-18 03:51:59

#6 Re: 全志 SOC » 使用 V3S 进行 USB 摄像头录制 » 2023-01-16 16:22:52

#7 Re: 全志 SOC » v3s接usb摄像头显示问题 » 2023-01-16 09:05:42

#8 Re: 全志 SOC » 使用 V3S 进行 USB 摄像头录制 » 2023-01-16 08:17:52

#9 Re: 全志 SOC » 使用 V3S 进行 USB 摄像头录制 » 2023-01-14 19:18:03

#10 全志 SOC » 使用 V3S 进行 USB 摄像头录制 » 2023-01-14 19:12:06

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