On Thu, Jul 12, 2018 at 12:43 AM Marton Balint <c...@passwd.hu> wrote: > > > > On Wed, 11 Jul 2018, Jun Zhao wrote: > > > use pixelutils API for sad in motion estimation. > > Does it make sense to improve this code? I thought a superior and faster > approach was a result of 2017 GSOC task: > > https://docs.google.com/document/d/1Hyh_rxP1KGsVkg7i7yU8Bcv92z0LIL4r-axpoKfvMFk/edit > > Maybe that code should be merged back, and any further optimalization > should be done based on that code, no? > > Thanks, > Marton > Hi, Marton:
Yes, now I try to improve the minterpolate, and after use perf profiing the commands: ./ffmpeg -i a.ts -filter_complex "minterpolate=mi_mode=mci:mc_mode=aobmc:vsbmc=1" -f null /dev/null I found the hotspot is: - get_sbad_ob - get_sbad - get_sad_ob - bilateral_obmc - set_frame_data So, as my plan, I will try to use sse2/avx2 Scatter/Gather, optimized sad function (use pixelutils API) in get_sbad_ob / get_sbad / get_sad_ob first, for set_frame_data case, maybe need to use Scatter/Gather SIMD instruction. But if some guys have done some improve task in this case, I think based on the pre-existing work is the better way. BTW: I have tried to use SIMD to improve the blend data path (like a command: ./ffmpeg -i a.ts -filter_complex "minterpolate=mi_mode=blend:scd=fdiff:scd_threshold=1" -f null /dev/null ), after the SIMD improve, the fps increae about 100% (from 30fps to 60fps in 1080P) _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
