IMX8MMini H264 H1 max GOP size

[vincentz63]

I am testing the i.MX8MMini's H1 H264 encoder with a gop-size=600, but when I look at the H.264 bitstream produced I can see that I frame was inserted every 300 frames.

gst-launch-1.0 v4l2src num-buffers=2400 ! queue ! vpuenc_h264 name=the_encoder quant=1 bitrate=100 pixel-aspect-ratio=1/1 gop-size=600 ! mpegtsmux ! filesink location=test_100kbps.mp4

Is the rate control algo for the H1 actually limited to GOPs of 300 frames somehow? The vpuenc_h264  element states that the range is 0 - 32767.

[brian14]

Hi

Sorry for the delayed reply.

I couldn't find any reference regarding a limitation for the H1 with the GOPs frames.

However, do you have any update about this issue?

Have a great day!