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rockchip-linux / mpp

Media Process Platform (MPP) module
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rk3328/rk1808 h.264 encoding speed #95

Open jonsmirl opened 5 years ago

jonsmirl commented 5 years ago

Is the h.264 encoder hardware the same on the RK1808 and the RK3228? Both are limited to 1080P30? Since RK1808 supports 4K sensors a 1080P30 encoder seems quite slow.

If the hardware is the same/similar, I can write my code on RK3228 while I wait for someone to make RK1808 dev board.

In the RK1808 datasheet it says: Video Encoder  Support H.264 video encoder at BP/MP/HP@level4.2  1920p@30FPS  1x1080p@30fps or 2x720p@30fps encoding

What does 1920p@30FPS mean? Does it mean 1920x3414 @ 30 FPS?

sliver-chen commented 5 years ago
  1. in my impression, there are two kind types of rockchip vpu, vpu1 and vpu2 respectively. but mpp has unified the difference brought by hardware, so you can develop application first in RK3228 and then move it to RK1808 board.
  2. 1920p@30fps means that 1920x1080 with 30 fps encoding ability.
HermanChen commented 5 years ago

level4.2 is an error. Level 4.2 is 1080p@60fps while level 4.1 is 1080p@30fps 1920p is also an error. I think it will be 1920x1080@30fps. If you add RK1808 support to mpp_vpu_version with HAVE_VPU2 flag it can support RK1808. But RK1808 only have H.264/jpeg encoder/decoder.

jonsmirl commented 5 years ago

Is there a mode when the rk1808 h.264 encoder supports 1080P@60FPS? That is a critical feature for the product we are designing. If the encoder supports 1080P@60FPS then it should also be able to do 4K@15FPS.

HermanChen commented 5 years ago

Emm... The hardware encoding has limit that unable to support larger resolution than its design. For internal memory and logic design limit 1080p hardware encoder can not support larger size like 4K. But smaller resolution with higher framerate is OK.

jonsmirl commented 5 years ago

Is there a mode that supports 1080P60?

HermanChen commented 5 years ago

You can try raise the vpu frequency. But it will effect stability and power consumption.

jonsmirl commented 5 years ago

I see, the hardware on the RK1808 is Level 4.1 so it is limited to 1080P30. The above reply was not clear in its meaning.

kira2016 commented 5 years ago

RK3328 datasheet HEVC: 1x1080p@30fps or 2x720p@30fps encoding, 是否支持 4路 编码？如果可以，要降低分辨率，要到多少？@ @HermanChen