Public bug reported: On Intel 12th gen CPUs (Alder Lake), ffmpeg requires package libmfx- gen1.2 to use QSV hardware decoding/encoding, but it's not marked as a dependency and therefore not installed with ffmpeg.
As stated on https://github.com/Intel-Media-SDK/MediaSDK#media-sdk-support-matrix, ADL-S, ADL-P and future Intel CPUs are not supported by libmfxhw64.so.1. When h264_qsv is used as a decoder or encoder, without libmfx-gen1.2 installed, ffmpeg exists with error: Error initializing an internal MFX session: unsupported (-3) This is because the libmfx.so.1 dispatcher wants to dispatch to libmfx- gen.so.1.2 for the Intel Quick Sync Video support, but can't due to the missing shared library. When libmfx-gen1.2 is installed, the dispatcher succeeds and the QSV usage occurs. It seems to me that libmfx-gen1.2 should be marked as a dependency (possibly as a dependency of libavutil56, of which ffmpeg depends) to ensure QSV hardware can be used on Alder Lake architectures, and beyond, without users figuring this out themselves. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: ffmpeg 7:4.4.1-3ubuntu5 Uname: Linux 5.17.0-051700-generic x86_64 ApportVersion: 2.20.11-0ubuntu82 Architecture: amd64 CasperMD5CheckResult: pass Date: Wed Apr 27 16:08:12 2022 InstallationDate: Installed on 2022-04-22 (5 days ago) InstallationMedia: Ubuntu-Server 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220421) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ffmpeg UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: ffmpeg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug jammy uec-images -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1970637 Title: ffmpeg depends on libmfx-gen1.2 on Alder Lake for Intel QSV support To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1970637/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
