Your message dated Wed, 21 Oct 2026 07:20:37 +0000
with message-id <[email protected]>
and subject line Bug#1151006: fixed in svt-av1 4.2.0+dfsg-3
has caused the Debian Bug report #1151006,
regarding ffmpeg: simple command makes ffmpeg to segfault
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1151006: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1151006
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: src:ffmpeg
Version: 7:9.0.2-3
Severity: important
Control: affects -1 src:libmedia-convert-perl
Dear maintainer:
I can't build libmedia-convert-perl on a system with 1 CPU because one of
the tests segfaults. However, the program crashing is ffmpeg.
How to reproduce: On a VM with 1 CPU, or booting with
GRUB_CMDLINE_LINUX="nr_cpus=1":
apt-get source libmedia-convert-perl
cd libmedia-convert-perl-1.6.1
ffmpeg -loglevel warning -y -i t/testvids/bbb.mp4 -dn -threads 1 -c:v libsvtav1
-r:v 24/1 -crf 25 -speed 4 -preset 4 -c:a libvorbis -b:a 133431 -ar 44100 -t 1
-pix_fmt yuv420p -svtav1-params tune=0:film-grain=8 ./1sec.webm
Output:
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v4.2.0
Svt[info]: SVT [build] : GCC 16.2.0 64 bit
Svt[info]: -------------------------------------------
Svt[info]: Level of Parallelism: 1
Svt[info]: Number of PPCS 74
Svt[info]: [asm level on system : up to avx512icl]
Svt[info]: [asm level selected : up to avx512icl]
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: main profile tier (auto) level (auto)
Svt[info]: SVT [config]: width / height / fps numerator / fps denominator
: 856 / 480 / 24 / 1
Svt[info]: SVT [config]: bit-depth / color format
: 8 / YUV420
Svt[info]: SVT [config]: preset / tune / pred struct
: 4 / VQ / random access
Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type
: 161 / 32 / key frame
Svt[info]: SVT [config]: BRC mode / rate factor
: CRF / 25.00
Svt[info]: SVT [config]: AQ mode / Variance Boost
: 2 / 0
Svt[info]: SVT [config]: film grain synth / denoising / level / adaptive
blocksize : 1 / 0 / 8 / True
Svt[info]: SVT [config]: sharpness / luminance-based QP bias
: 0 / 0
Svt[info]: SVT [config]: QP scale compress strength
: 0
Svt[info]: -------------------------------------------
Segmentation fault
For the upstream authors: Instead of downloading the source for
libmedia-convert-perl, the input
file bbb.mp4 can be downloaded from this URL, which is where the package is
hosted in salsa:
https://salsa.debian.org/wouter/media-convert/-/blob/main/t/testvids/bbb.mp4?ref_type=heads
Thanks.
--- End Message ---
--- Begin Message ---
Source: svt-av1
Source-Version: 4.2.0+dfsg-3
Done: Sebastian Ramacher <[email protected]>
We believe that the bug you reported is fixed in the latest version of
svt-av1, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Sebastian Ramacher <[email protected]> (supplier of updated svt-av1 package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 21 Oct 2026 09:01:20 +0200
Source: svt-av1
Architecture: source
Version: 4.2.0+dfsg-3
Distribution: unstable
Urgency: medium
Maintainer: Debian Multimedia Maintainers <[email protected]>
Changed-By: Sebastian Ramacher <[email protected]>
Closes: 1151006
Changes:
svt-av1 (4.2.0+dfsg-3) unstable; urgency=medium
.
* debian/patches: Apply upstream patch to fix encode on single core systems
(Closes: #1151006)
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