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  about mpp audio record fail
Posted by: ardon - 10-17-2018, 09:27 AM - Forum: General - Replies (3)

提示:部分应用在使用alsa-lib库中接口snd_pcm_hw_params_set_period_size_near和snd_pcm_hw_params_set_buffer_size_near时需要alsa-lib库编译时把alsa-devdir、pcm-plugins、ctl-plugins打开
debian系统默认没有打开,如需实用请重新编译alsa-lib源码,通过configure打开此功能如下:


  • 卸载原有alsa
sudo apt-get remove libasound2 --purge

  • 安装编译alsa-lib
sudo apt-get source alsa-lib sudo ./configure --with-alsa-devdir=/dev/snd --with-pcm-plugins=all --with-ctl-plugins=all --without-versioned --enable-static=no sudo make sudo make install

  • 安装编译alsa-utils
sudo apt-get source alsa-utils sudo ./configure sudo make sudo make install

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  can V5 run V3S driving record project?
Posted by: arglues - 10-17-2018, 01:21 AM - Forum: General Discussion on Lindenis V5 - Replies (1)

Originally I wanted to buy the V3S developing board to develop a project just like driving recorder product, the the sales recommendated the newer V5 board to me. I bought double boards and tested almost mpp_sample and app. 
Now I want to try transport v3s project sourcecode to v5 board.  Can V5 support team confirm that the V5 board has capability to run the driving recorder sample code?

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  Launch board on Indiegogo
Posted by: jonsmirl - 10-16-2018, 06:37 PM - Forum: General - Replies (6)

Last year Wu Caesar launched his V3 board on Indiegogo and sold $13,600 worth of boards. 
https://www.indiegogo.com/projects/liche...n-finger#/

Have you considered launching your V5 board on Indiegogo? You can still launch again there even if you are already shipping. For sure cnx-software guy will help you promote indiegogo launch.

Wu is located in Shenzhen, maybe he can give you some tips on launching your board. He graduated four years ago.

His email is:  无材 <zepanwucai@gmail.com>

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Photo How to fix /mpp_sample/app errors
Posted by: given - 10-16-2018, 11:52 AM - Forum: General Discussion on Lindenis V5 - Replies (2)

When you firstly run mpp_sample/app, you will find there are several errors like these:
   

Don't worry! Fix it by following the blow steps:
1. get the root priority by enter :

Code:
$ sudo su


2.install the necessary dependent libraries :

Code:
# apt-get install libgoogle-glog-dev libasound2-dev

3. copy the dynamic link libraries of the app_mpp_sample to /usr/lib
Code:
# cd mpp_sample/app
# cp ./lib/libTinyServer.so /usr/lib/

4. compile and run the app_mpp_sample.
Code:
# cd mpp_sample/app
# make or make all
... compiling...
...
# cd release
# ./app_mpp_sample

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  Pan and zoom
Posted by: jonsmirl - 10-13-2018, 12:17 AM - Forum: General Discussion on Lindenis V5 - Replies (3)

The image sensor is 4K. And I want to send 1080P output. Is there an API that will let me pan my 1080P window around inside the 4K frame while keeping the pipeline active? 

Can I also dynamically zoom - switch between mapping the entire 4K frame into 1080P vs panning a 1080P window around inside the 4K frame?

I would like to do this is real time and not interrupt the h.264 encoding.

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  Lindenis V5 on Taobao and AliExpress are now available
Posted by: csjamesdeng - 10-10-2018, 08:46 AM - Forum: News - Replies (2)

Taobao store link. AliExpress store link.

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  How to Connect LCD Screen?
Posted by: derekvalleroy - 10-08-2018, 03:52 PM - Forum: General Discussion on Lindenis V5 - Replies (1)

Does anyone have a picture or instructions for connecting the LCD screen to the kit?

I'm not sure what direction the flex goes in.

Also, there appears to be a smaller ribbon cable, but I'm not sure where this connects to?

Any help is appreciated!

-Derek

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  G2D_CMD_STRETCHBLT
Posted by: tylerjbrooks - 10-08-2018, 12:53 AM - Forum: General Discussion on Lindenis V5 - Replies (1)

This ioctl call apparently finishes before the blit is complete.  
Is there some way to query if the stretch blit is complete?
Is the 'g2d_wait_cmd_finish()' exposed someplace?

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  Add demos from Allwinner SDK to Lindinos
Posted by: jonsmirl - 09-29-2018, 12:08 AM - Forum: General Discussion on Lindenis V5 - Replies (3)

For new users it would be convenient if all of the demo apps from the Allwinner V5 SDK were included in the OS download. Put them in a folder on the desktop so that they will be obvious to new users.  Everyone likes a whiz-bang demo when they first open a new toy.

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  Changing encoder bit rate and framerate
Posted by: tylerjbrooks - 09-20-2018, 12:36 AM - Forum: General Discussion on Lindenis V5 - Replies (3)

Is there a way to change the H264 encoder bitrate while it is running?  I would like to adjust the bit rate when in constant bit rate mode.  I see the 'AW_MPI_VENC_SETRcParam' API has been commented out.  Is there another way to do it?

Does the AW_MPI_VENC_SetFrameRate function work while the encoder is running?

If I wanted to change the bitrate and/or framerate, do I just stop receiving pictures or do I have to reset the encoder?

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