memory allocation of 58737033216 bytes failed when encoding with some zone files with --split-method none

[Akatmks]

Description

• When encoding using some zone files with --split-method none, av1an would fail with memory allocation of 58737033216 bytes failed.
• With the same zones file, the amount of memory (58737033216 here) required is always the same. With a different zones file, the number can vary but mostly stays in the range of several baker's dozens of GiB.
• In cases I do have more free memory than it is trying to allocate but the same error occurs nonetheless.
• Some zones file with similar amount of zones does not trigger this issue, or at least it seems so. An example is provided below.
• This issue does not occur if I change --split-method none to --split-method av-scenechange in the commandline below.

To Reproduce

Command:
av1an -y --max-tries 5 --resume --keep --verbose -i source.mkv -o output.mkv --split-method none --extra-split 360 --min-scene-len 6 --zones zones.txt --chunk-method bestsource --encoder svt-av1 --pix-format yuv420p10le --workers 1 --video-params "--lp 5 --keyint -1 --lookahead 120 --color-primaries 1 --transfer-characteristics 1 --matrix-coefficients 1 --color-range 0" --concat mkvmerge

A zones file that will trigger the issue:
with.issue.zones.txt

A zones file that doesn't trigger the issue:
without.issue.zones.txt

Information

av1an 0.4.4-unstable (rev e6b29a5) (Release)

* Compiler
  rustc 1.84.0 (LLVM 19.1)

* Target Triple
  x86_64-pc-windows-msvc

* Date Info
  Commit Date:  2025-01-28

* VapourSynth Plugins
  systems.innocent.lsmas : Found
  com.vapoursynth.ffms2  : Not found
  com.vapoursynth.dgdecodenv : Not found
  com.vapoursynth.bestsource : Found