#9645: Can't enable hardware decoders for H.264/AVC and H.265/HEVC without
enabling software decoders
-------------------------------------+-------------------------------------
Reporter: Neal Gompa | Type: defect
Status: new | Priority: normal
Component: avcodec | Version:
| unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
In Fedora, we're trying to ship a build of FFmpeg that's maximally useful
without shipping encumbered stuff. To that end, we want to be able to rely
on built-in hardware codecs available on the user's system for codecs we
can't ship (such as H264 (AVC) and HEVC (H.265)). Unfortunately, it seems
that it doesn't work for all decoders but the V4L2-M2M and QSV ones. That
means people who have NVDEC, VDPAU, and VAAPI offload for decoding cannot
use them through ffmpeg.
A solution for this would require source level separation so that just
enough stuff is available to leverage the hardware decoders, since we have
to strip ffmpeg sources of stuff we can't ship before we upload it for
build. My understanding is that the AV1 decoder has this separation
(though we have AV1 fully turned on in FFmpeg in Fedora), so it's not
entirely without precedent.
How to reproduce:
1. Download the ffmpeg-5.0 release tarball
2. Build ffmpeg with the following configure line:
{{{
% ./configure --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg
--docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 '--optflags=-O2
-flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe
-Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
-Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
-fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1
-m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection
-fcf-protection' '--extra-cflags=-O2 -flto=auto -ffat-lto-objects
-fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'
--disable-htmlpages --enable-pic --disable-stripping --enable-shared
--disable-static --enable-gpl --enable-version3 --enable-libsmbclient
--disable-openssl --enable-gnutls --enable-ladspa --enable-vulkan
--disable-cuda-sdk --enable-libaom --enable-libass --enable-libbluray
--enable-libbs2b --enable-libcdio --enable-libdav1d --enable-libdc1394
--enable-libdrm --enable-libfdk-aac --enable-libfontconfig --enable-
libfreetype --enable-libfribidi --enable-libgsm --enable-libjack --enable-
libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt
--enable-libopus --enable-libpulse --enable-librav1e --enable-
librubberband --enable-libsvtav1 --enable-libsoxr --enable-libspeex
--enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libv4l2
--enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg
--enable-libzvbi --enable-lto --enable-libmfx --enable-vaapi --enable-
vdpau --enable-muxers --enable-demuxers --disable-encoders --disable-
decoders --disable-decoder=mpeg4,h263,h264,hevc,vc1 --enable-
encoder=,libfdk_aac,ac3,apng,ass,ayuv,bmp,ffv1,ffvhuff,flac,gif,h263_v4l2m2m,h264_amf,h264_nvenc,h264_qsv,h264_v4l2m2m,h264_vaapi,hevc_amf,hevc_nvenc,hevc_qsv,hevc_v4l2m2m,hevc_vaapi,huffyuv,jpegls,jpeg2000,libaom,libaom_av1,libcodec2,libgsm,libmp3lame,libopenjpeg,libopus,librav1e,libschroedinger,libspeex,libsvtav1,libtheora,libtwolame,libvorbis,libvpx_vp8,libvpx_vp9,libwebp,libwebp_anim,mjpeg,mjpeg_qsv,mp2,mp2fixed,mpeg1video,mpeg2video,mpeg2_qsv,mpeg4_v4l2m2m,opus,pam,pbm,pcm_alaw,pcm_f32be,pcm_f32le,pcm_f64be,pcm_f64le,pcm_mulaw,pcm_s16be,pcm_s16be_planar,pcm_s16le,pcm_s16le_planar,pcm_s24be,pcm_s24le,pcm_s24le_planar,pcm_s32be,pcm_s32le,pcm_s32le_planar,pcm_s8,pcm_s8_planar,pcm_u16be,pcm_u16le,pcm_u24be,pcm_u24le,pcm_u32be,pcm_u32le,pcm_u8,pcx,pgm,pgmyuv,png,ppm,rawvideo,sgi,srt,ssa,sunrast,targa,text,tiff,v210,v308,v408,v410,vc1_qsv,vc1_v4l2m2m,vorbis,vp8_qsv,vp8_v4l2m2m,vp9_qsv,webvtt,wrapped_avframe,xbm,xwd,y41p,yuv4,zlib,
--enable-
decoder=,libfdk_aac,ac3,ansi,apng,ass,av1_qsv,ayuv,bmp,dirac,exr,ffv1,ffvhuff,ffwavesynth,flac,gif,gsm,h263_v4l2m2m,h264_nvdec,h264_vdpau,h264_vaapi,h264_v4l2m2m,h264_qsv,hevc_nvdec,hevc_vdpau,hevc_vaapi,hevc_v4l2m2m,hevc_qsv,huffyuv,ilbc,jpeg2000,libaom,libaom_av1,libcelt,libcodec2,libdav1d,libgsm,libopenjpeg,libopus,libschroedinger,libspeex,libvorbis,libvpx_vp8,libvpx_vp9,mjpeg,mjpeg_qsv,mp1,mp1float,mp2,mp2float,mp3,mp3float,mpeg1video,mpeg1_v4l2m2m,mpeg2video,mpeg2_qsv,mpeg2_v4l2m2m,mpeg4_v4l2m2m,opus,pam,pbm,pcm_alaw,pcm_bluray,pcm_dvd,pcm_f32be,pcm_f32le,pcm_f64be,pcm_f64le,pcm_mulaw,pcm_s16be,pcm_s16be_planar,pcm_s16le,pcm_s16le_planar,pcm_s24be,pcm_s24le,pcm_s24le_planar,pcm_s32be,pcm_s32le,pcm_s32le_planar,pcm_s8,pcm_s8_planar,pcm_u16be,pcm_u16le,pcm_u24be,pcm_u24le,pcm_u32be,pcm_u32le,pcm_u8,pcx,pgm,pgmyuv,pgssub,pgx,png,ppm,rawvideo,sgi,srt,ssa,sunrast,targa,text,theora,tiff,v210,v210x,v308,v408,v410,vc1_qsv,vc1_v4l2m2m,vorbis,vp3,vp5,vp6,vp6a,vp6f,vp8,vp8_qsv,vp8_v4l2m2m
,vp9,vp9_qsv,vp9_v4l2m2m,webp,webvtt,wrapped_avframe,xbm,xwd,y41p,yuv4,zlib,
}}}
3. Note that the resulting ffmpeg lacks a number of hardware decoders
enabled at configure time:
{{{
% ffmpeg -decoders | grep h264
[...]
V..... h264_v4l2m2m V4L2 mem2mem H.264 decoder wrapper (codec
h264)
V....D h264_qsv H264 video (Intel Quick Sync Video
acceleration) (codec h264)
% ffmpeg -decoders | grep hevc
[...]
V....D hevc_qsv HEVC video (Intel Quick Sync Video
acceleration) (codec hevc)
V..... hevc_v4l2m2m V4L2 mem2mem HEVC decoder wrapper (codec
hevc)
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9645>
FFmpeg <https://ffmpeg.org>
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