Hello, I'm currently working on GSOC 2016 project for upgrading FFV1 codec with an ability to use P frames. Maybe some of you have any suggestions or recommendations.
While working on qualification task I implemented a simple modification of codec to encode P frames without motion compensation, so now the base for trying several MC approaches is ready. My plan of upgrade is the next: 1) I want to try current realization of OBMC algorithm from snow*.c 2) Then try to take some ideas from HEVC 2.1) In paper "Overview of the High Efficiency Video Coding (HEVC) Standard" (can be found here http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6316136) motion compensation process is described. It includes quarter pixel interpolation technic, intra- and inter-frame predicting strategies, quadtree of frame blocks, several types of predicted units, so there is a lot of stuff to try next. 2.2) In "PARALLEL AMVP CANDIDATE LIST CONSTRUCTION FOR HEVC" ( https://www.researchgate.net/profile/Liang_Zhao57/publication/261497818_Parallel_AMVP_candidate_list_construction_for_HEVC/links/54117bd10cf264cee28b3964.pdf) can be found algorithm to make MC process faster. 2.3) Authors of "HEVC Lossless Coding and Improvements" ( http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.352.3447&rep=rep1&type=pdf) proposed Sample-Based Angular Intra Prediction algrorithm special for lossless compression, which can be tried too. 3) Try to use filtration just like bilateral in "SEPARABLE BILATERAL FILTERING FOR FAST VIDEO PREPROCESSING" ( http://elynxsdk.free.fr/ext-docs/Bilateral/ICME2005_TPLV.pdf) as pre-processing part, it can reduce compression size due to encoding noise values only from a current frame. 4) Maybe try some non common ideas like not use motion vectors as in "Lossless Video Sequence Compression Using Adaptive Prediction" ( https://www.researchgate.net/profile/K_Sayood/publication/51386836_Lossless_Video_Sequence_Compression_Using_Adaptive_Prediction/links/5489cf110cf225bf669c7487.pdf ). I'll be appreciate for any ideas or comments how to improve proposed project. Regards, Stanislav D. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
