Zond 265

Zond 265 is the first-to-market tool for the visual in-depth analyzing of HEVC/H.265 video bitstreams. It is intended to help video developers and researchers in codec development, easily isolate and identify visual artifacts or problems with bitstream compliance, and see the encoding elements of video data.

It shows in a handy way NAL information, frames types, frames sizes, time stamps, decoding/display order counters, bits distribution between frame elements, coding units data, coding units coefficients, predicted partitions, transform partitions, motion vectors, quantizers, different stages of picture decoding - predicted picture, before deblock filtering, after deblock filtering, and final picture.

Features

Convenient frame-by-frame navigation based on the frame bars in decoding or the display order

Frames size histogram and color highlighting of different kinds of frames (I, B, P). Marking of reference frames for the current picture

Easy-to-use visual presentation of data from all levels of a video stream and decoding stages
• All headers with content. Headers sizes and offsets within a stream
• Highlighting of slice and related headers (SPS, PPS, etc.) that belong to a current frame
• Pixels to be predicted, reconstructed, after deblocking and adaptive loop filtration
• Coding units (CU): coordinates, dimension, and bit-size. Color highlighting different types of CUs (Inter, Intra)
• Prediction units (PU). A spatial prediction mode of intra PU luma and chroma components. Inter PU’s motion vectors, reference lists, reference indexes.
• Transform units (TU): dimension and offset within CU. Luma and chroma coefficients before de-quantization.
• Overlay a frame with a CU, PU, or TU grid and motion vectors

Gathering and visual presentation of bits distribution statistics to be used while encoding CU, PU, and TU data (skip_mb_flag, merge_flag, mvd, cbf_luma, etc.). Displaying results as a pie chart and table