xiph/flac

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Free Lossless Audio Codec

Stars: 2.4k
Forks: 363
Open beginner issues: 0
Indexed issues: 66

Dominant language: C
License: GFDL-1.3
Last GitHub push: Jul 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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66 open issues indexed

Update the links in include/FLAC/format.h to the IETF specs Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

xiph/flac#929 · Opened Aug 21, 2026
some flac streams choke and stutter with flac 1.5.0 Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

xiph/flac#925 · Opened Jul 28, 2026
Inconsistent --test outputs across multiple runs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#923 · 5 comments · Opened Jul 23, 2026
Re-encoding: behaviour of --no-keep-foreign-metadata and --keep-foreign-metadata Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

xiph/flac#922 · 4 comments · Opened Jul 23, 2026
Decoding of chained Ogg FLAC files not work Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

xiph/flac#921 · 2 comments · Opened Jul 19, 2026
test_libFLAC fails for Debug builds on Windows Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

xiph/flac#919 · 2 comments · Opened Jul 17, 2026
FLAC: Floating Point Exception (Division by Zero) in flac__encode_file when processing crafted WAVE files with bitsPerSample < 8 Open

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

xiph/flac#917 · 1 comment · Opened Jul 9, 2026
Write callback not called after seeking to frame within last block Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

xiph/flac#906 · 3 comments · Opened Jun 6, 2026
shntool "len" function for flac files is broken after V1.3.2 Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

xiph/flac#904 · 2 comments · Opened May 27, 2026
[bug] TOCTOU race condition in grabbag__file_change_stats allows symlink-based permission escalation Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

xiph/flac#902 · 3 comments · Opened May 13, 2026
--force-aiff-c-sowt-format results in non-interoperable files unless the original sample size is 16 bits Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

xiph/flac#901 · 12 comments · Opened May 9, 2026
multichannel playback issues Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#900 · 10 comments · Opened May 8, 2026
JPEG XL Support Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#898 · 5 comments · 3 reactions · Opened Mar 31, 2026
Windows problem with SetConsoleOutputCP CP_UTF8 and chcp 65001 Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

xiph/flac#894 · 3 comments · Opened Mar 13, 2026
TOCTOU race condition in grabbag__file_copy_metadata() Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

xiph/flac#893 · 3 comments · Opened Mar 9, 2026
metaflac: --list --data-format=none | --no-data Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#892 · Opened Mar 5, 2026
[BUG] Memory error in `flac analyze.c` Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

xiph/flac#887 · 1 comment · Opened Feb 28, 2026
[BUG] Memory error in `flac` Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

xiph/flac#873 · 11 comments · Opened Feb 11, 2026
[FLAC 1.5.0] man page generation produces HYPHEN instead of HYPHEN-MINUS Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

xiph/flac#872 · 1 comment · Opened Feb 4, 2026
Feature wish: -A2, -A3 etc aliases for -A "subdivide_tukey(#)" Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

xiph/flac#869 · Opened Feb 1, 2026
No way to set lead in/out in cue sheet metadata. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#864 · 1 comment · Opened Jan 6, 2026
Neon code fails to build with ARM64 MSVC Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

xiph/flac#863 · 1 comment · Opened Jan 4, 2026
FFmpeg piping result in error Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

xiph/flac#860 · 1 comment · Opened Dec 9, 2025
Files that fail --keep-foreign-metadata Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

xiph/flac#858 · 9 comments · Opened Nov 6, 2025
multithreading for decoding ? Open

enhancement/wish libFLAC

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#857 · 2 comments · Opened Oct 30, 2025
[bug] Heap-overflow (read) via `FLAC__metadata_object_vorbiscomment_set_vendor_string` Open

bug libFLAC

Difficulty 3/5 1-2 days Newbie friendliness 45/100

xiph/flac#855 · 1 comment · Opened Oct 29, 2025
SIGABRT in src/flac/encode.c:1011 when fuzzing with tool_flac Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

xiph/flac#852 · Opened Sep 23, 2025
API porting documentation unclear - changes in 1.5.0 and older versions Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#849 · 2 comments · Opened Sep 3, 2025
Having trouble running a python program in a ARM64 device Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

xiph/flac#847 · 1 comment · Opened Aug 28, 2025
Decoding/Encoding with avx512 Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

xiph/flac#846 · 3 comments · Opened Aug 24, 2025
The compress data size is bigger than the original pcm data? Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

xiph/flac#841 · 6 comments · Opened Jul 19, 2025
flac(1) man page should refer to multiple -A functions as semicolon-separated, not comma-separated Open

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

xiph/flac#840 · 1 comment · Opened Jun 27, 2025
Filename limits? FLAC__STREAM_ENCODER_IO_ERROR Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

xiph/flac#837 · 3 comments · Opened Jun 5, 2025
Metaflac: no output file when using -o and changes weren't needed Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

xiph/flac#834 · Opened May 7, 2025
flac 1.5 changes code page Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

xiph/flac#833 · 3 comments · Opened May 5, 2025
max thread count is not directly settable or queryable Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#823 · 6 comments · Opened Mar 16, 2025
Maxing out the number of PICTURES flac.exe can handle: "ERROR: 2 consecutive FLAC__STREAM_DECODER_END_OF_STREAM events." Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

xiph/flac#821 · 2 comments · Opened Mar 16, 2025
Documentation: the "Known bugs" webpage https://xiph.org/flac/documentation_bugs.html Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#819 · 5 comments · Opened Mar 6, 2025
man/header.inc, man/footer.inc and style.css missing from release tarballs Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

xiph/flac#815 · Opened Feb 26, 2025
Documentation generated inconditionally when pandoc is found Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

xiph/flac#805 · Opened Feb 13, 2025
Test failure on 32-bit x86 (`round-trip test (rt-1-12-1.aifc) encode... decode... compare... rt-1-12-1.aifc rt.aifc differ: char 8, line 1`) Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#804 · 4 comments · Opened Feb 13, 2025
Not possible to add multiple images to a flac file Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

xiph/flac#780 · 3 comments · Opened Dec 26, 2024
Handling of foreign metadata in flac ( / metaflac); suggestion to retain upon decoding and optionally allow deletion upon re-encoding Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#778 · Opened Dec 21, 2024
`flac` is inconsistent in when it uses an extension or file magic Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#777 · 3 comments · Opened Dec 19, 2024
flac seems to write malformed AIFF-C, both none and sowt Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#767 · 6 comments · Opened Dec 2, 2024
.WAV files are deleted after decoding attempt Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

xiph/flac#763 · 12 comments · Opened Nov 25, 2024
Cases where -e makes compression worse; does -e really do everything it should? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

xiph/flac#728 · 13 comments · Opened Jul 18, 2024
255 byte path limit on Windows is a thing of the past since 2016, please respect that for flac/metaflac Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

xiph/flac#689 · 7 comments · 4 reactions · Opened Apr 16, 2024
On Windows the flac command line has problems in dealing with files with long filename/path Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

xiph/flac#687 · 1 comment · 1 reaction · Opened Apr 9, 2024
Add foreign metadata handling of some malformed chunks Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

xiph/flac#680 · Opened Mar 17, 2024

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