I tried to trivially add qsv/mediacodec decode to cinelerra-gg, but discovered that I can't use it like vaapi/vdpau/cuda because (?) qsv/mediacodec not listed in ffmpeg/libavcodec/hwconfig.h and (for h264) in ffmpeg/libavcodec/h264dec.c so on decoding I get (in termux, cingg compiled with system ffmpeg) Decoder h264 does not support device type mediacodec. HW device init failed, using SW decode. file:/data/data/com.termux/files/home/20210419_055507A.mp4 err: Operation not permitted yet ffmpeg -hwaccel show ~/cinelerra/cinelerra-5.1 $ ffmpeg -hwaccels ffmpeg version 6.1.2 Copyright (c) 2000-2024 the FFmpeg developers built with Android (12027248, +pgo, +bolt, +lto, +mlgo, based on r522817) clang version 18.0.1 ( https://android.googlesource.com/toolchain/llvm-project d8003a456d14a3deb8054cdaa529ffbf02d9b262) configuration: --arch=aarch64 --as=aarch64-linux-android-clang --cc=aarch64-linux-android-clang --cxx=aarch64-linux-android-clang++ --nm=llvm-nm --pkg-config=/home/builder/.termux-build/_cache/android-r27-api-24-v1/bin/pkg-config --strip=llvm-strip --cross-prefix=aarch64-linux-android- --disable-indevs --disable-outdevs --enable-indev=lavfi --disable-static --disable-symver --enable-cross-compile --enable-gnutls --enable-gpl --enable-version3 --enable-jni --enable-lcms2 --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libharfbuzz --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenmpt --enable-libopus --enable-librav1e --enable-libsoxr --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-mediacodec --enable-opencl --enable-shared --prefix=/data/data/com.termux/files/usr --target-os=android --extra-libs=-landroid-glob --disable-vulkan --enable-neon --disable-libfdk-aac libavutil 58. 29.100 / 58. 29.100 libavcodec 60. 31.102 / 60. 31.102 libavformat 60. 16.100 / 60. 16.100 libavdevice 60. 3.100 / 60. 3.100 libavfilter 9. 12.100 / 9. 12.100 libswscale 7. 5.100 / 7. 5.100 libswresample 4. 12.100 / 4. 12.100 libpostproc 57. 3.100 / 57. 3.100 Hardware acceleration methods: opencl mediacodec === is it oversight or some more fundamental limitation?