Issues

• Interlace: code the two fields of a frame as a unit (field-pair GOP structure)

  Multicorewareinc/x265#994 · Filter by author tobbee opened on Oct 14, 2026

• --field: pic_struct 3/4 signalled with field_seq_flag=1, and bff fields mislabelled

  Multicorewareinc/x265#982 · Filter by author tobbee opened on Sep 29, 2026
  7

  

• CLI --field mode skips every other input frame and hangs before the end of the input

  Multicorewareinc/x265#981 · Filter by author tobbee opened on Sep 29, 2026
  1

  

• Feature request: write the frame_packing_arrangement SEI (x264 --frame-packing equivalent)

  Multicorewareinc/x265#970 · Filter by author danielcamposramos opened on Sep 15, 2026
  5

• Incorrect HRD picture timing CpbDpbDelays with --pic-struct

  Multicorewareinc/x265#883 · Filter by author cubicibo opened on Apr 29, 2026
  2

  

• Enabling "threaded-me" resulting in a massive performance regression

  bug
  Multicorewareinc/x265#780 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  8

• sdr encode get x265 [INFO]: tools: b-intra deblock(tC=-3:B=-3) dhdr10-info

  bug
  Multicorewareinc/x265#779 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  4

  

• FindNuma.cmake fails to find library if not in the NUMA_ROOT_DIR

  bug
  Multicorewareinc/x265#778 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

• Parallel builds sometimes cause race conditions in assembly generation

  bug
  Multicorewareinc/x265#777 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

  

• invalid memory access when encoding X265_CSP_I400

  bug
  Multicorewareinc/x265#775 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

• Heap corruption issue

  bug
  Multicorewareinc/x265#774 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026

• (Regression) why was the resolution limit introduced?

  bug
  Multicorewareinc/x265#773 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  4

• Fatal Error: EXCEPTION_ACCESS_VIOLATION_EXEC / 0x0 in CUData::initCTU

  bug
  Multicorewareinc/x265#772 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

• WPP and lookahead-slices may cause ghosting when used together with mcstf

  bug
  Multicorewareinc/x265#771 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  6

• nasm fails, when building 10-bit binaries on i386

  bug
  Multicorewareinc/x265#768 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

• Build of 4.1 fails on FreeBSD/armv7

  bug
  Multicorewareinc/x265#767 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

• Default build settings resulting in erroneous frame data on CLANG

  bug
  Multicorewareinc/x265#760 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  3

• mvdLX out of range in rare cases

  bug
  Multicorewareinc/x265#758 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  8

• RISCV support

  enhancement
  Multicorewareinc/x265#756 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026

• AltiVec acceleration (on POWER architecture) produces visual artifacts in Big Endian environments

  bug
  Multicorewareinc/x265#755 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026

• Windows 11 slower than Windows 10

  bug
  Multicorewareinc/x265#754 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1

• Poor 2-Pass performance in recent 4.1 builds

  bug
  Multicorewareinc/x265#752 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  12

• Fails to build using g++ 15.1 and glibc 2.41

  bug
  Multicorewareinc/x265#751 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026

• LInking fails on ppc64le: can't restore toc; (plt call stub)

  bug
  Multicorewareinc/x265#748 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026

• FFmpeg use x265 memory Leak

  bug
  Multicorewareinc/x265#746 · Filter by author Akilan-Sivakumar opened on Apr 18, 2026
  1