Problem controlling the bitrate on the New Vim4 h264 encoder

VIM4
1

Which system do you use? Android, Ubuntu, OOWOW or others?

Ubuntu 24

Which version of system do you use? Please provide the version of the system here:

Welcome to Fenix 1.7.3 Ubuntu 24.04.2 LTS Linux 5.15.137

Please describe your issue below:

@numbqq

I’m using the encoder API in libvpcodec.so and /usr/include/vp_multi_codec_1_0.h
I’m getting weird error messages that I don’t remember were there on the old VIM4.

Can you please help me port my software to the new VIM4 (with NPU)?
I can use a different h264 hardware encoder library if needed.

When I try and change the bitrate on the encoder by calling vl_video_encoder_change_bitrate()
I get no error back, but when the next frame is encoded this (see log) appears on stderr

Post a console log of your issue below:


Encoder changed to bitrate 2950000
[vdi_sys_sync_inst_param:673] [VDI] fail to deliver sync instance param inst_idx=0

[AML_MultiEncNAL:2283] VPU instance param sync with change param failed!
2

Hello @steely-glint

Can you check this ?

3

Hi @numbqq Unfortunately I get the same error message,

Encoder changed to bitrate 2000000
[vdi_sys_sync_inst_param:673] [VDI] fail to deliver sync instance param inst_idx=0

[AML_MultiEncNAL:2272] VPU instance param sync with change param failed!

And no change in the encoded bitrate (Which is what I set when I inited the encoder).

By the way, I am not using gstreamer - I’m accessing the encoder via the libvpcodec.so API - that deb doesn’t seem to update the library. Please let me know if I need to use a different API.

Thanks.

4

Hello @steely-glint

Could you share your steps to us to reproduce this issue?

5

Sure - I will need to build a small standalone app - at the moment it is part of a larger app.
I will let you know when I have it.