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bravobit / FFmpeg-Android

FFMpeg/FFprobe compiled for Android
https://bravobit.nl/
MIT License
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Set volume audio #84

Open Elyseyvova opened 5 years ago

Elyseyvova commented 5 years ago

Hello! I want to change volume in audio file: String[] cmd = {"-i", mAudioFile.getAbsolutePath(), "-af", "volume=0.2", mNewAudioFile.getAbsolutePath()};

But message:

built with gcc 4.9.x (GCC) 20150123 (prerelease) configuration: --target-os=linux --cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-ffprobe --enable-libopus --enable-libvorbis --enable-libfdk-aac --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-libvpx --enable-libass --enable-yasm --enable-pthreads --disable-debug --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-linux-perf --disable-doc --disable-shared --enable-static --enable-runtime-cpudetect --enable-nonfree --enable-network --enable-avresample --enable-avformat --enable-avcodec --enable-indev=lavfi --enable-hwaccels --enable-ffmpeg --enable-zlib --enable-gpl --enable-small --enable-nonfree --pkg-config=pkg-config --pkg-config-flags=--static --prefix=/root/bravobit/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-cxxflags= libavutil 56. 14.100 / 56. 14.100 libavcodec 58. 18.100 / 58. 18.100 libavformat 58. 12.100 / 58. 12.100 libavdevice 58. 3.100 / 58. 3.100 libavfilter 7. 16.100 / 7. 16.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 1.100 / 5. 1.100 libswresample 3. 1.100 / 3. 1.100 libpostproc 55. 1.100 / 55. 1.100 Failed to set value 'volume=0.2' for option 'af': Option not found

What could be wrong? Thanks!

SacDeFromage commented 5 years ago

@Elyseyvova Hey did you find a solution to your problem? I have a very similar issue and was not able to locate the problem...

Brianvdb commented 5 years ago

Not sure why this is happening. Can you try the following?

ffmpeg -i input.wav -filter:a "volume=0.5" output.wav