Hi everyone,
I try to config the vpu to get constant bitrate with high vedio quality.
my vpuenc lib version as follow:
====== VPUENC: 4.4.5 build on Oct 30 2019 12:04:50. ======
wrapper: 3.0.0 (VPUWRAPPER_ARM64_LINUX Build on Oct 30 2019 11:31:36)
vpulib: 1.1.1
firmware: 1.1.1.65535
According to the follow ticket prompt, I need to set nUserQpMinEnable and userQpMaxEnable
https://community.nxp.com/t5/i-MX-Processors/What-s-the-right-configuration-of-iMX53-vpu-that-can-ge...
I have queried the code of GStreamer vpuenc, which uses a structure vpuencopenparamsimp, the structure has no members of nUserQpMinEnable or userQpMaxEnable. GStreamer vpuenc plugins use api VPU_EncOpenSimp instead of VPU_EncOpen.
https://source.codeaurora.org/external/imx/gst1.0-plugins-fsl/tree/plugins/vpu/gstvpuenc.c?h=nxp/MM_...
As the document 《i.MX VPU Application Programming Interface
Linux® Reference Manual》 says, VPU_EncOpen Function to open new VPU handle, called by function VPU_EncOpenSimp.
My question:
1）VPU_ Encopen and Vpu_ Encopensimp, what is the other area of these two APIs? why use Vpu_ Encopensimp ,but not VPU_ Encopen?
2）in gstvpuenc.h, can I use VpuEncOpenParam instead of VpuEncOpenParamSimp? By doing so, I can modify the members nUserQpMinEnable and userQpMaxEnable in the structure.
https://source.codeaurora.org/external/imx/gst1.0-plugins-fsl/tree/plugins/vpu/gstvpuenc.h?h=nxp/MM_...
gstreamer vpuenc plugins allows me to do so? Will this approach cause other problems?
