Some questions about ecoding

[sqalex]

1. When initializing the encoder according to the sample code, a message always pops up: “NVMEDIA: Need to set EMC bandwidth: 705000”. What does this mean, and does it need to be modified?
2. When encoding 9 channels of video, if the hw_preset_type is set to medium or above, the output_plane always blocks at the dqBuffer where video data is input, causing the program to crash. This issue does not occur when encoding 7 channels of video. How can this problem be resolved? It would be best if the hw_preset_type could be set to slow, as the image quality is the best with this setting.

[DaneLLL]

Hi,

@sqalex

When initializing the encoder according to the sample code, a message always pops up: “NVMEDIA: Need to set EMC bandwidth: 705000”. What does this mean, and does it need to be modified?

This is harmless and please ignore it.

@sqalex

When encoding 9 channels of video, if the hw_preset_type is set to medium or above, the output_plane always blocks at the dqBuffer where video data is input, causing the program to crash. This issue does not occur when encoding 7 channels of video. How can this problem be resolved? It would be best if the hw_preset_type could be set to slow, as the image quality is the best with this setting

The encoding speed is slower in medium preset so we would suggest not to use it in multi-encoding threads. Would suggest set to fast or ultrafast preset.

For balancing video quality and bitrate, please try to set to CBR + virtual buffer size. May refer to the post:
Random blockiness in the picture RTSP server-client -Jetson TX2 - #5 by DaneLLL