[FFmpeg-user] Dynamic range compression fail with: invalid argument

[Paul B Mahol]

On Sat, Oct 23, 2021 at 3:26 PM Android PowerUser <tschikruma at gmail.com>
wrote:

> I try
>
> ffmpeg -y -i "/storage/emulated/0/Download/(M4A_128K).m4a"
> compand=0|0:1|1:-90/-900|-70/-70|-30/-9|0/-3:6:0:0:0
> "/storage/emulated/0/Download/(M4A_128K)_1.m4a"
>
> for dynamic range compression, but it call back: invalid argument
>
> Detail:
> ffmpeg -y -i "/storage/emulated/0/Download/(M4A_128K).m4a"
> compand=0|0:1|1:-90/-900|-70/-70|-30/-9|0/-3:6:0:0:0
> "/storage/emulated/0/Download/(M4A_128K)_1.m4a"
>

Where is "-af "  part?

>
> ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
>   built with gcc 4.9.x (GCC) 20150123 (prerelease)
>   configuration: --enable-version3 --enable-gpl --enable-nonfree
> --disable-indev=v4l2 --enable-libmp3lame --enable-libx264 --enable-libx265
> --enable-libvpx --enable-libvorbis --enable-libtheora --enable-libopus
> --enable-libfdk-aac --enable-libfreetype --enable-libass
> --enable-libfribidi --enable-fontconfig --enable-pthreads --enable-libxvid
> --enable-filters --enable-openssl --enable-librtmp
> --disable-protocol='udp,udplite' --enable-libopencore-amrwb
> --enable-libopencore-amrnb --enable-libvo-amrwbenc --enable-libspeex
> --enable-libsoxr --enable-libwebp --enable-libxml2 --enable-libopenh264
> --enable-mediacodec --enable-jni
>
> --prefix=/home/silentlexx/AndroidstudioProjects/ffmpeg/ffmpeg/build/arm64-api21-r13b
>
> --sysroot=/home/silentlexx/Android/android-ndk-r13b/platforms/android-21/arch-arm64
> --arch=arm64 --disable-shared --enable-static --enable-pic --enable-ffmpeg
> --disable-ffplay --disable-ffprobe --disable-ffnvcodec --disable-avdevice
> --disable-debug --disable-doc --disable-htmlpages --disable-manpages
> --disable-podpages --disable-txtpages --disable-symver
>
> --cross-prefix=/home/silentlexx/Android/android-ndk-r13b/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-
> --target-os=android --enable-cross-compile --pkg-config-flags=--static
> --extra-libs='-lgnustl_static -lm -lpng -l:libz.so -lpthread' --enable-asm
> --enable-neon --enable-libxavs2 --enable-libdav1d --enable-libaom
> --disable-runtime-cpudetect --enable-small
>   libavutil      56. 70.100 / 56. 70.100
>   libavcodec     58.134.100 / 58.134.100
>   libavformat    58. 76.100 / 58. 76.100
>   libavfilter     7.110.100 /  7.110.100
>   libswscale      5.  9.100 /  5.  9.100
>   libswresample   3.  9.100 /  3.  9.100
>   libpostproc    55.  9.100 / 55.  9.100
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0xb400007077e1a000] Unknown cover type: 0x1.
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Download/
>   Metadata:
>     major_brand     : M4A
>     minor_version   : 512
>     compatible_brands: isomiso2
>   Duration: 00:03:03.62, start: 0.000000, bitrate: 129 kb/s
>   Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp,
> 125 kb/s (default)
>     Metadata:
>       handler_name    : SoundHandler
>       vendor_id       : [0][0][0][0]
> [NULL @ 0xb400007077e1ac00] Unable to find a suitable output format for
> 'compand=0|0:1|1:-90/-900|-70/-70|-30/-9|0/-3:6:0:0:0'
> compand=0|0:1|1:-90/-900|-70/-70|-30/-9|0/-3:6:0:0:0: Invalid argument
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