RK3399Pro入门教程（6）硬件编解码器MPP库的使用

appleUncle 发表于 2020-4-6 14:50
我发现一个神奇的问题，，，，我在源码编译安装mpp库的时候，，最新的提交都跑不起来，或者跑一会就死循环 ...

可以去github提issues

zhouzhouzlove 发表于 2019-9-6 09:50
当直接把ffmpeg的packet中的data给到mpp的packet的时候，是否遇见过这个报错：
mpp_packet: Assertion p- ...

我有遇到，请问是哪里的问题

zhouzhouzlove 发表于 2019-8-29 10:51
斑竹辛苦了，这个属性，是否就是制定了默认的输出类型？
我看了代码，是输入命令-f后面的参数。但是这个 ...

你好想问下，编译ffmpeg 打开 rkmpp然后编译出现以下错误。。您之前出现过吗？
libavutil/hwcontext_drm.c:124:29: error: ‘DRM_FORMAT_NV12_10’ undeclared here (not in a function)

hello,what is the reason for this problem?  thank
[toybrick@toybrick aarch64]$ ./make-Makefiles.bash
-- cmake version 3.14.4
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:30 (project):
  The CMAKE_C_COMPILER:

    aarch64-linux-gnu-gcc

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
  the compiler, or to the compiler name if it is in the PATH.


CMake Error at CMakeLists.txt:30 (project):
  The CMAKE_CXX_COMPILER:

    aarch64-linux-gnu-g++

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!
See also "/home/toybrick/mpp/build/linux/aarch64/CMakeFiles/CMakeOutput.log".
See also "/home/toybrick/mpp/build/linux/aarch64/CMakeFiles/CMakeError.log".
[toybrick@toybrick aarch64]$ ./make-Makefiles.bash
-- cmake version 3.14.4
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:30 (project):
  The CMAKE_C_COMPILER:

    aarch64-linux-gnu-gcc

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
  the compiler, or to the compiler name if it is in the PATH.


CMake Error at CMakeLists.txt:30 (project):
  The CMAKE_CXX_COMPILER:

    aarch64-linux-gnu-g++

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!
See also "/home/toybrick/mpp/build/linux/aarch64/CMakeFiles/CMakeOutput.log".
See also "/home/toybrick/mpp/build/linux/aarch64/CMakeFiles/CMakeError.log".

请问MPP库支持直接H264编码UVC摄像头的MJPEG格式数据吗？还是需要将数据转换为YUYV？

kevin 发表于 2020-7-13 14:44
请问MPP库支持直接H264编码UVC摄像头的MJPEG格式数据吗？还是需要将数据转换为YUYV？ ...

要转

jefferyzhang 发表于 2020-7-13 15:16
要转

那么使用mpp/codec/dec/jpeg/下的文件可以调用硬件解码不？如果可以与libjpeg解码效率上有不同吗？

kevin 发表于 2020-7-13 18:32
那么使用mpp/codec/dec/jpeg/下的文件可以调用硬件解码不？如果可以与libjpeg解码效率上有不同吗？ ...

mpp硬解码解码jpeg速度不是很快，这颗芯片主要是解码264 265的，
相比cpu优势就是不占用cpu资源

zhouzhouzlove 发表于 2019-8-31 09:57
楼主大神，是的，没错，我又来了。。。。。。。。
是这样的，我运行mpi_dec_test时，运行的时候，cpu占用率 ...

你好！请问你最后是怎么从AVPacket喂数据到MppPacket的？我这边一直解码不成功

你好，我将ffmpeg获取的视频流喂给mpp，一直无法正确解析数据，代码如下：
buf = pkt.data；//pkt为ffmpeg获取的视频帧数据包AVPacket pkt
mpp_packet_write(packet, 0, buf, pkt.size);
mpp_packet_set_pos(packet, buf);
mpp_packet_set_length(packet, pkt.size);
其他地方参考mpi_dec_test.c请问是我这样喂数据存在什么问题？