On Mon, 19 Jan 2026 16:51:30 +0000 Peter van den Houten via ffmpeg-user <[email protected]> wrote:
> On 17/01/2026 17:52, David Niklas via ffmpeg-user wrote: > > On Sat, 17 Jan 2026 09:51:08 +0000 > > Peter van den Houten via ffmpeg-user<[email protected]> wrote: > >> On 16/01/2026 18:01, David Niklas via ffmpeg-user wrote: > >>> Hello, > >>> I'm trying to encode a 4K video with ffmpeg. The QSV encoder will > >>> not initialize. > >>> > >>> I've tried searching online, but all I can find is that my syntax > >>> might be incorrect. I have tried to read the ffmpeg wiki, but it > >>> doesn't explain what to use nor how to use it. The provided examples > >>> in the wiki fail with the exact same errors as below. > >>> > >>> Any ideas? > >>> Thanks! > >>> > >>> > >>> % ffprobe tmp.mp4 > >>> <snip reason=Duplicate version info."> > >>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tmp.mp4': > >>> Metadata: > >>> major_brand : isom > >>> minor_version : 512 > >>> compatible_brands: isomiso2avc1mp41 > >>> encoder : Lavf62.3.100 > >>> Duration: 00:03:15.79, start: 0.000000, bitrate: 36078 kb/s > >>> Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), > >>> yuvj420p(pc, bt709, progressive), 3840x2160, 35970 kb/s, 30 fps, 30 > >>> tbr, 90k tbn (default) Metadata: handler_name : VideoHandle > >>> vendor_id : [0][0][0][0] > >>> Side data: > >>> displaymatrix: rotation of -180.00 degrees > >>> > >>> > >>> % ffmpeg -init_hw_device qsv=hw -filter_hw_device hw -i tmp.mp4 -c:v > >>> vp9_qsv -b:v 2M -preset veryslow vp9_qsv.webm ffmpeg version 8.0 > >>> Copyright (c) 2000-2025 the FFmpeg developers built with gcc 12 > >>> (Debian 12.2.0-14+deb12u1) configuration: --prefix=/usr/local > >>> --enable-gpl --enable-version3 --enable-nonfree --enable-gray > >>> --enable-doc --enable-alsa --enable-chromaprint --enable-frei0r > >>> --enable-gmp --enable-ladspa --enable-lcms2 --enable-libaom > >>> --enable-libaribb24 --enable-libass --enable-libbluray > >>> --enable-libbs2b --enable-libcaca --enable-libcdio > >>> --enable-libcodec2 --enable-libdav1d --enable-libdavs2 > >>> --enable-libdvdnav --enable-libdvdread --enable-libflite > >>> --enable-libfontconfig --enable-libfreetype --enable-libharfbuzz > >>> --enable-libglslang --enable-libgme --enable-libgsm > >>> --enable-libilbc --enable-libjack --enable-libjxl > >>> --enable-libkvazaar --enable-libmodplug --enable-libmp3lame > >>> --enable-liboapv --enable-libopencore-amrnb > >>> --enable-libopencore-amrwb --enable-libopenh264 > >>> --enable-libopenjpeg --enable-libopenmpt --enable-libopus > >>> --enable-libqrencode --enable-librabbitmq --enable-librav1e > >>> --enable-librist --enable-librsvg --enable-librubberband > >>> --enable-librtmp --enable-libshine --enable-libsnappy --enable- > >>> libsoxr --enable-libspeex --enable-libsrt --enable-libssh > >>> --enable-libsvtav1 --enable-libtesseract --enable-libtheora > >>> --enable-libtwolame --enable-libuavs3d --enable-libv4l2 > >>> --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis > >>> --enable-libvpx --enable-libvvenc --enable-libwebp --enable-libx264 > >>> --enable-libx265 --enable-libxeve --enable-libxevd --enable-libxavs > >>> --enable-libxavs2 --enable-libxvid --enable-libxml2 > >>> --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 > >>> --enable-lzma --enable-libmysofa --enable-openal --enable-opencl > >>> --enable-opengl --enable-openssl --enable-pocketsphinx > >>> --enable-sndio --enable-sdl2 --enable-vapoursynth --enable-libvpl > >>> --enable-v4l2-m2m --disable-stripping --cpu=native > >>> --target-os=linux --enable-shared libavutil 60. 8.100 / 60. > >>> 8.100 libavcodec 62. 11.100 / 62. 11.100 libavformat 62. > >>> 3.100 / 62. 3.100 libavdevice 62. 1.100 / 62. 1.100 > >>> libavfilter 11. 4.100 / 11. 4.100 libswscale 9. 1.100 / 9. > >>> 1.100 libswresample 6. 1.100 / 6. 1.100 [QSV @ 0x55c48ea44440] > >>> No supported child device type is enabled Device creation failed: > >>> -38. Failed to set value 'qsv=hw' for option 'init_hw_device': > >>> Function not implemented Error parsing global options: Function not > >>> implemented > >> Hey David > >> > >> What version is your Intel CPU? > > I gave you the model number in the title (265K), so I'm uncertain what > > you're interested in, specifically. Here's the first listing of > > /proc/cpuinfo, if it helps: > > > > % less /proc/cpuinfo > > processor : 0 > > vendor_id : GenuineIntel > > cpu family : 6 > > model : 198 > > model name : Intel(R) Core(TM) Ultra 7 265K > > stepping : 2 > > microcode : 0x119 > > cpu MHz : 800.095 > > cache size : 30720 KB > > physical id : 0 > > siblings : 20 > > core id : 0 > > cpu cores : 20 > > apicid : 0 > > initial apicid : 0 > > fpu : yes > > fpu_exception : yes > > cpuid level : 35 > > wp : yes > > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr > > pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > > pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs > > bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf > > tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 > > ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt > > tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm > > 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced > > tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 > > smep bmi2 erms invpcid rdt_a rdseed adx smap clflushopt clwb intel_pt > > sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_detect user_shstk > > avx_vnni lam wbnoinvd dtherm ida arat pln pts hwp hwp_notify > > hwp_act_window hwp_epp hwp_pkg_req hfi vnmi umip pku ospke waitpkg > > gfni vaes vpclmulqdq rdpid bus_lock_detect movdiri movdir64b fsrm > > md_clear serialize arch_lbr ibt flush_l1d arch_capabilities vmx flags > > : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad > > ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid > > unrestricted_guest vapic_reg vid ple shadow_vmcs pml ept_violation_ve > > ept_mode_based_exec tsc_scaling usr_wait_pause notify_vm_exiting > > ipi_virt bugs : spectre_v1 spectre_v2 spec_store_bypass > > swapgs bhi bogomips : 7759.00 clflush size : 64 > > cache_alignment : 64 address sizes : 46 bits physical, 48 bits > > virtual power management: > > > > > > > >> I've not been able to solve this problem using the qsv API, only > >> using -hwaccel vaapi or -hwaccel cuda (if you have a Nvidia GPU). > >> There appears to be some confusion as to which Intel GPU version > >> supports the FFmpeg qsv API and how this is implemented. > > Yeah, I kinda noticed that. > > > >> Also, the h.266 encoder, enabled via your libvvenc, will not encode > >> with Quick Sync and libvvdec will only work with the very latest > >> Intel CPU/GPUs. > >> > >> Cheers Peter > > Well, the 265K is the very latest -- unless you're referring to the > > paper launched laptop CPUs from intel at CES. > > > > Thanks, > > David > > > > > Apologies for missing the Intel 265K in the subject line; my brain > quickly tabbed to the body of the email at "Cannot use QSV." > > I use a Nvidia GPU for encoding workflows but since my Debian FFmpeg > machine (GIT build with --enable-libvpl, the latest Intel incantation) > has a Xeon CPU supporting QSV, I thought I might be able to add another > decoding/encoding instance using QSV. > > Several years back, I successfully used FFmpeg with QSV on an old > borrowed _Windows_ laptop; this is making me think that the problem is > Linux driver related, as you are also having problems with a very > modern CPU (albeit with a different error message): > > "No supported child device type is enabled Device creation failed: > -38" vs my "Error creating a MFX session: -9"). > > Another caveat is that HandBrake also reports that QSV is missing, > although it also uses some of the same libraries as FFmpeg, so that may > still be a factor. > > I don't have a physical Windows platform available to test the latest > FFmpeg, only Windows VMs and they do not pass through the Intel GPU. > > This is the beginning of the command that I successfully used on the > physical Windows platform. Some of these options might not work/be > invalid with the latest FFmpeg: > > ffmpeg -init_hw_device qsv=hw -filter_hw_device hw -hwaccel qsv > -hwaccel_output_format qsv > > Lastly, according to the QSV encoding/decoding compatibility chart, > your CPU (Arrow Lake) is not supported for VVC. This chart may be out > of date but there are so many conflicting resources and no definitive > answers, I'm not sure any longer: > > https://en.wikipedia.org/wiki/Intel_Quick_Sync_Video > Hello, First of all, I'd like to point out that I'm trying to encode VP9 *not* VVC. If you read my original email, quoted above, you'll see that. The wikipedia article says that QSV is run via vaapi. When I compiled ffmpeg, I encountered several errors trying to build the various features. I reported opencv as not compiling, but got no answers. I didn't want to overload the ML, so I didn't bother with the others, like vaapi. Vaapi doesn't build because my Devuan (Debian) system /usr/include doesn't have stdbit.h. The ffmpeg source has it in compat/stdbit/stdbit.h . Below is the exact error. Any ideas on how to resolve this? I have build-essential installed as well as pretty much every dependency I could find with ./configure. Thanks! PS: Yes, I did read INSTALL.md. It didn't mention any dependencies. gcc -D_ISOC11_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -O2 -mtune=native -march=native -march=native -std=c17 -fomit-frame-pointer -fPIC -pthread -I/usr/local/include/oapv -I/usr/include/lilv-0 -I/usr/include/serd-0 -I/usr/include/sord-0 -I/usr/include/sratom-0 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/fribidi -I/usr/include/libxml2 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/bs2b -I/usr/local/include -I/usr/include/libdrm -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -DHWY_SHARED_DEFINE -I/usr/local/include -I/usr/lib/x86_64-linux-gnu/pkgconfig/../../../include -I/usr/lib/x86_64-linux-gnu/pkgconfig/../../../include/vpl -DMFX_DEPRECATED_OFF -I/usr/include/openjpeg-2.5 -I/usr/include/x86_64-linux-gnu -I/usr/include/opus -I/usr/include/opus -I/usr/include/rav1e -I/usr/include/librsvg-2.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/x86_64-linux-gnu -I/usr/include/webp -pthread -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/p11-kit-1 -I/usr/include/srt -I/usr/include/svt-av1 -DEB_DLL -I/usr/include/leptonica -I/usr/local/include -I/usr/local/include -I/usr/include/webp -I/usr/include/webp -DX264_API_IMPORTS -I/usr/local/include -I/usr/local/include/xevd -I/usr/local/include/xeve -isystem /usr/include/mit-krb5 -I/usr/include/pgm-5.3 -I/usr/include/libxml2 -I/usr/include/libxml2 -I/usr/include/AL -I/usr/include/sphinxbase -I/usr/include/pocketsphinx -I/usr/include/x86_64-linux-gnu -I/usr/include/x86_64-linux-gnu/sphinxbase -I/usr/include/libdrm -g -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -Wno-unused-const-variable -Wno-bool-operation -Wno-char-subscripts -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -Wno-maybe-uninitialized -c -o /tmp/ffconf.GB4dpkT1/test.o /tmp/ffconf.GB4dpkT1/test.c /tmp/ffconf.GB4dpkT1/test.c:1:10: fatal error: stdbit.h: No such file or directory 1 | #include <stdbit.h> | ^~~~~~~~~~ compilation terminated. ERROR: vaapi requested but not found _______________________________________________ ffmpeg-user mailing list -- [email protected] To unsubscribe send an email to [email protected]
