[Question]: <AMF_VIDEO_ENCODER_RATE_CONTROL_METHOD_CBR bitrate is higher then target bitrate>

[xiaozhilaoliu]

params is below:
AMF_VIDEO_ENCODER_PEAK_BITRATE : 545 x1000
AMF_VIDEO_ENCODER_TARGET_BITRATE:545x1000
qp: min/max = 0/51

my problem is:
encoder output bitrate is higher then 545 x1000;explem: 1440 x1000 .....

[MikhailAMD]

What is your GPU?
Do you use the latest driver?
Try to enable AMF_VIDEO_ENCODER_FILLER_DATA_ENABLE

[xiaozhilaoliu]

What is your GPU? Do you use the latest driver? Try to enable AMF_VIDEO_ENCODER_FILLER_DATA_ENABLE

thank for replay;

this is my environment :
1、Driver Version:30.0.21001.1004
2、gpu：AMD Radeon RX 6600

enable AMF_VIDEO_ENCODER_FILLER_DATA_ENABLE is useless

[MikhailAMD]

If you can, please share source and result clips, Also please try to repro with TranscodeHW sample.

[xiaozhilaoliu]

video_local_encoded-2022-05-23-18-33-58-1-Amd-640x360.zip

this is my result；i expect :
bitrate : 485kbs
fps:15

I am based on sample development, and there are many internal implementations of coupling logic; why peak_bitrate cannot control the maximum bit rate

[MikhailAMD]

The clip doesn't look overcomplicated.
I have to see full set of parameters with values - preferably in a code snippet.

[xiaozhilaoliu]

The clip doesn't look overcomplicated. I have to see full set of parameters with values - preferably in a code snippet.

property:LowLatencyInternal1
property:Profile66
property:RateControlPreanalysisEnable1
property:QualityPreset0
property:RateControlMethod1
property:TargetBitrate480000
property:PeakBitrate480000
property:MinQP0
property:MaxQP51
property:IDRPeriod15
property:HeaderInsertionSpacing15
property:SlicesPerFrame1
property:BReferenceEnable0
property:CABACEnable1
property:TargetBitrate485000
property:PeakBitrate485000

[MikhailAMD]

This is app values: how the app sees them. I would like to see how did the app sets them using AMF API, also Init() call. If you don't want to share code, enable AMF_TRACE_DEBUG log level and share debug output.

[xiaozhilaoliu]

amflog.txt

[xiaozhilaoliu]

amflog.txt

@MikhailAMD this is log

[MikhailAMD]

Hi, thanks for the log. I don't see set of AMF_VIDEO_ENCODER_FILLER_DATA_ENABLE = true. Could you please add and send log and the result stream?

[xiaozhilaoliu]

thanks for replay;here is my test:
amflog.txt
video_local_encoded-2022-05-25-23-21-10-1-Amd-640x360.zip

[MikhailAMD]

OK, thanks. Please try to remove set of AMF_VIDEO_ENCODER_PREENCODE_ENABLE or AMF_VIDEO_ENCODER_RATE_CONTROL_PREANALYSIS_ENABLE. This is more experimental feature, doesn't work in some cases.

[xiaozhilaoliu]

PREENCODE_ENABLE

thanks for replay;
I remove set of AMF_VIDEO_ENCODER_PREENCODE_ENABLE，Problem still not solved

[MikhailAMD]

Please share log and output file

[xiaozhilaoliu]

Please share log and output file
video_local_encoded-2022-05-27-01-01-37-1-Amd-640x360.zip
amflog.txt

[xiaozhilaoliu]

Please share log and output file
video_local_encoded-2022-05-27-01-01-37-1-Amd-640x360.zip
amflog.txt

@MikhailAMD Excuse me,did you find anything suspicious?

[MikhailAMD]

We didn't forget :). Over weekend I consulted with codec folks. They don't see anything wrong in the log. But they cannot reproduce the issue either. So to move forward they ask you to reproduce the problem with one of AMF samples:
TranscodeHW.exe -input <input_file> -output <output_flie> -width 640 -height 360 -codec h264 -EncoderInstance 0 -Usage TRANSCODING -Profile main -ProfileLevel 50 -LowLatencyInternal true -QualityPreset speed -RateControlMethod CBR -FrameRate 15,1 -EnforceHRD true -VBVBufferSize 48000 -FillerDataEnable true -TargetBitrate 480000 -PeakBitrate 480000 -IDRPeriod 15

you can modify parameters any way you like to repro.

or
SimpleEncoder - modify it to your set of parameters and add read of raw data.

This way we could repro on our side.
Also please update to the latest driver: https://www.amd.com/en/support/graphics/amd-radeon-6000-series/amd-radeon-6600-series/amd-radeon-rx-6600

[xiaozhilaoliu]

We didn't forget :). Over weekend I consulted with codec folks. They don't see anything wrong in the log. But they cannot reproduce the issue either. So to move forward they ask you to reproduce the problem with one of AMF samples: TranscodeHW.exe -input <input_file> -output <output_flie> -width 640 -height 360 -codec h264 -EncoderInstance 0 -Usage TRANSCODING -Profile main -ProfileLevel 50 -LowLatencyInternal true -QualityPreset speed -RateControlMethod CBR -FrameRate 15,1 -EnforceHRD true -VBVBufferSize 48000 -FillerDataEnable true -TargetBitrate 480000 -PeakBitrate 480000 -IDRPeriod 15

you can modify parameters any way you like to repro.

or SimpleEncoder - modify it to your set of parameters and add read of raw data.

This way we could repro on our side. Also please update to the latest driver: https://www.amd.com/en/support/graphics/amd-radeon-6000-series/amd-radeon-6600-series/amd-radeon-rx-6600

OK, thanks