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xkfz007 · 18th November 2013, 10:16

@nm
I have tried about 25 sequences. Also 300 frames are used. For some sequences, the difference is about 1~3%,but for several sequences it is about 10%, even 15%.
About --ratetol, I have tried too. Indeed, it will improve the accuracy, leading to bad quality. About the accuracy, owing to the low delay of my application, it is unacceptable to converge after about 3000 frames(60s @fps=50).
The current ABR in x264 only used on Frame level, and when MB level is considered, the vbv-related params should be set. So I want to adjust the QP of each MB based on the QP decided by ABR in Frame level. However I have not find some useful methods. So it is appreciated if you could give me some suggestions. Thanks in advance.

18th November 2013, 10:16	#7 \| Link
xkfz007 Registered User Join Date: Sep 2013 Posts: 38	@nm I have tried about 25 sequences. Also 300 frames are used. For some sequences, the difference is about 1~3%,but for several sequences it is about 10%, even 15%. About --ratetol, I have tried too. Indeed, it will improve the accuracy, leading to bad quality. About the accuracy, owing to the low delay of my application, it is unacceptable to converge after about 3000 frames(60s @fps=50). The current ABR in x264 only used on Frame level, and when MB level is considered, the vbv-related params should be set. So I want to adjust the QP of each MB based on the QP decided by ABR in Frame level. However I have not find some useful methods. So it is appreciated if you could give me some suggestions. Thanks in advance.