创建mpp解码器实例失败

请问楼主的问题解决了吗？我也遇到了相似的问题如下，
[toybrick@toybrick test]$ ./mpp_info_test
mpp_info_test: mpp revision is 0
mpp_info_test: mpp info all:
Without VCS info
mpp_info_test: mpp info revision: -1
mpp_info_test: mpp info date    :
mpp_info_test: mpp info author  : Unknown

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这是另一个例程执行情况：

[toybrick@toybrick test]$ ./mpi_test
mpi_test: mpi_test start
mpi_test: mpi_test decoder test start
mpi: mpp_create enter ctx 0x7fe9add220 mpi 0x7fe9add228
mpi: mpp version: Without VCS info
mpi: mpp_create leave ret 0 ctx 0x1e28b460 mpi 0x7f969934c8
mpi: mpp_init enter ctx 0x1e28b460 type 0 coding 0
mpp: unable to create unsupported type 0 coding 0
mpi: mpp_init leave ret -1
mpi_test: mpp_init failed
mpi: mpp_destroy enter ctx 0x1e28b460
mpi: mpp_destroy leave ret 0
mpi_test: mpi_test failed

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固件是刷的资料库里最新的TB-RK3399ProD-v1.5.zip
设备文件权限也是一样：

[toybrick@toybrick test]$ ls -l /dev/rkvdec
crw-rw-rw- 1 root root 244, 0 Feb 20  2019 /dev/rkvdec
[toybrick@toybrick test]$ ls -l /dev/vpu_service
crw-rw-rw- 1 root root 245, 0 Feb 20  2019 /dev/vpu_service