Could I turn-off compound predictions for encoding a vp9 video?

[여현호]

Hi, I'm a Ph.D. candidate working on video streaming.

I'm currently developing DNN-based codec based on libvpx for a vp9 video.

For my research, I want to test a encoded video with single-prediction and compound-predictions.

Thus, could I manually turn-off compound-predictions for a vp9 encoder?

Since I haven't read code for the encoder-side, any guide would be really helpful!

Thanks,

Hyunho

[chiy...@google.com]

Hi Yeo!

I don't think there is a way to turn off compound prediction in vp9. But if you are willing to recompile libvpx, we can try the following:

In the file vp9/encoder/vp9_rdopt.c, there is a function called vp9_rd_pick_inter_mode_sb. In side the function, there is a giant for loop that iterates through the prediction modes (the loop variable is midx).

There is a variable called comp_pred in the loop. Adding an if-statement that skips comp_pred should do the trick.

[Hyunho Yeo, KAIST]

Thank you.

I'll look at that code first.

It really helps me a lot.

- Hyunho

2019년 10월 30일 수요일 오전 2시 45분 11초 UTC+9, chiy...@google.com 님의 말: