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.
