I’ve tried running for example ffmpeg -i 1_5111632628432240784.MP4 -c:v h264_mediacodec -c:a aac -b:v 1M -g 60 test.mp4 in Termux in different variations, which yields an output like this, regardless of whether I specify output bitrate or not:
amediacodec_ndk @ 0xb400006fa0cc6980 Encoder configure failed, -10000
[h264_mediacodec @ 0xb400006fa0cd2000] MediaCodec configure failed, Generic error in an external library
[vost#0:0/h264_mediacodec @ 0xb400006fa0cb9300] Error initializing output stream: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
I saw that ffmpeg supports MediaCodec since February 2023: “MediaCodec decoder via NDKMediaCodec, MediaCodec encoder”.
The version I have installed is compiled to support it:
ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
built with Android (9352603, based on r450784d1) clang version 14.0.7 (https://android.googlesource.com/toolchain/llvm-project 4c603efb0cca074e9238af8b4106c30add4418f6)
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-r25c-api-24-v2/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-libfreetype --enable-libgme --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-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. 2.100 / 58. 2.100
libavcodec 60. 3.100 / 60. 3.100
libavformat 60. 3.100 / 60. 3.100
libavdevice 60. 1.100 / 60. 1.100
libavfilter 9. 3.100 / 9. 3.100
libswscale 7. 1.100 / 7. 1.100
libswresample 4. 10.100 / 4. 10.100
libpostproc 57. 1.100 / 57. 1.100
So my question is, how can I use hardware accelerated video decoding and encoding using ffmpeg on Android in a terminal?
