New feature

1. Aom Film-Grain characteristics as a SEI message to support Film Grain Synthesis.

API changes

1. API Support to enable VBV end feature.
2. Reverted the 4.0 api changes.
3. Added command line parameters for Aom film grain characteristics as a SEI message to the bitstream (--aom-film-grain).
4. Added support to configure Bitrate, CRF, and QP at frame level, along with CLI support for frame-level RC configuration (--frame-rc)
5. Declared few params(numapools, csvfn, scalingLists etc) with fixed size to fix memory leaks

Optimizations

1. Eliminated redundant pointer copies in lowresMC and lowresQPelCost, improving encoding performance by up to 0.9% on modern CPUs.
2. Mcstf optimization - Improved mcstf performance by moving mcstf computation to lookahead and search range optimization.

Bug fixes

1. mcstf crash when using multiple frame threads.
2. CLI parsing for MV-HEVC Encode.
3. segfault and decoder crash in scc.
4. compilation issue in clang.
5. potential stack buffer overflow issues.
6. documentation for b-intra, max-merge, limit-refs and qg-size
7. memory leak fixes for sei, zones, sao, hme, vbv, sbrc, mcstf, alpha, multiview, scc, two pass, rskip, film grain, aq-mode, scaling_list, fades, analysis save and load etc

Known issues

1. Inconsistent output with recon option
2. Output mismatch between analysis save & load with cutree for reuse-levels < 10

The release tar was improperly made, so I repackaged it.

Tested on:

• Windows 10+ (via MinGW)
• macOS 10.13+
• Ubuntu Linux