On 28/12/2018 17:04, Alex Mogurenko wrote: > problem occurs in slice quant estimation and slice encoding. > > if slice quant >= MAX_STORED_Q we dont use pre-calculated quant matrices > but generate new: > > qmat = ctx->custom_q; > > qmat_chroma = ctx->custom_q; > > for (i = 0; i < 64; i++) { > > qmat[i] = ctx->quant_mat[i] * quant; > > qmat_chroma[i] = ctx->quant_chroma_mat[i] * quant; > > } > > > as you see both qmat and qmat_chroma both point to same ctx -> custom_q > > as result they will contain chroma qunatizers as > > > qmat_chroma[i] = ctx->quant_chroma_mat[i] * quant; > > > last in loop, after all we pass qmat/qmat_chroma to function where we > estimate encoded slice size or encode slice: > > estimate_slice_plane / encode_slice_plane > > > I will make new patch with detailed description >
Thanks, this makes sense, I missed that the fact it was setting it in the loop. - Derek _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel