dlopen failed: cannot locate symbol "av_rdft_init" crash

[pascaaaal]

dlopen failed: cannot locate symbol "av_rdft_init" crash

[tanersener]

Would you mind explaining the mobile-ffmpeg binary used in the application? Is it a prebuilt binary package installed from mavenCentral() or a binary built locally?

[pascaaaal]

It's the prebuild binary package full-gpl:4.4 from mavenCentral()

[tanersener]

Tested your command using full-gpl package on an arm64 device. I don't see anything wrong in the logs.

I suggest looking inside your apk file and checking if all mobile-ffmpeg libraries are there for arm64. Testing your application on another device can also help. It can be an issue about your device as well.

I/mobile-ffmpeg: Loading mobile-ffmpeg.
I/mobile-ffmpeg: Loaded mobile-ffmpeg-full-gpl-arm64-v8a-4.4-20210207.
D/mobile-ffmpeg-test: FFmpeg process started with arguments
    '-i /data/user/0/com.arthenica.mobileffmpeg.test/cache/file.aac -ss 00:00:01.00 /data/user/0/com.arthenica.mobileffmpeg.test/files/file1.aac -y'.
I/mobile-ffmpeg: ffmpeg version v4.4-dev-416
I/mobile-ffmpeg:  Copyright (c) 2000-2020 the FFmpeg developers
I/mobile-ffmpeg:   built with Android (6454773 based on r365631c2) clang version 9.0.8 (https://android.googlesource.com/toolchain/llvm-project 98c855489587874b2a325e7a516b99d838599c6f) (based on LLVM 9.0.8svn)
I/mobile-ffmpeg:   configuration: --cross-prefix=aarch64-linux-android- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --target-os=android --enable-neon --enable-asm --enable-inline-asm --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-openssl --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-static --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec
I/mobile-ffmpeg:   libavutil      56. 55.100 / 56. 55.100
I/mobile-ffmpeg:   libavcodec     58. 96.100 / 58. 96.100
I/mobile-ffmpeg:   libavformat    58. 48.100 / 58. 48.100
I/mobile-ffmpeg:   libavdevice    58. 11.101 / 58. 11.101
I/mobile-ffmpeg:   libavfilter     7. 87.100 /  7. 87.100
I/mobile-ffmpeg:   libswscale      5.  8.100 /  5.  8.100
I/mobile-ffmpeg:   libswresample   3.  8.100 /  3.  8.100
W/mobile-ffmpeg: [aac @ 0x7816cb8200] Estimating duration from bitrate, this may be inaccurate
I/mobile-ffmpeg: Input #0, aac, from '/data/user/0/com.arthenica.mobileffmpeg.test/cache/file.aac':
I/mobile-ffmpeg:   Duration:
I/mobile-ffmpeg: 00:03:05.99
I/mobile-ffmpeg: , bitrate:
I/mobile-ffmpeg: 128 kb/s
I/mobile-ffmpeg:     Stream #0:0
I/mobile-ffmpeg: : Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s
I/mobile-ffmpeg: Stream mapping:
I/mobile-ffmpeg:   Stream #0:0 -> #0:0
I/mobile-ffmpeg:  (aac (native) -> aac (native))
I/mobile-ffmpeg: Press [q] to stop, [?] for help
I/mobile-ffmpeg: Output #0, adts, to '/data/user/0/com.arthenica.mobileffmpeg.test/files/file1.aac':
I/mobile-ffmpeg:   Metadata:
I/mobile-ffmpeg:     encoder         :
I/mobile-ffmpeg: Lavf58.48.100
I/mobile-ffmpeg:     Stream #0:0
I/mobile-ffmpeg: : Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s
I/mobile-ffmpeg:     Metadata:
I/mobile-ffmpeg:       encoder         :
I/mobile-ffmpeg: Lavc58.96.100 aac
I/mobile-ffmpeg: size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
I/mobile-ffmpeg: size=     132kB time=00:00:08.21 bitrate= 131.4kbits/s speed=16.4x
I/mobile-ffmpeg: size=     256kB time=00:00:18.39 bitrate= 114.0kbits/s speed=18.4x
I/mobile-ffmpeg: size=     256kB time=00:00:28.79 bitrate=  72.8kbits/s speed=19.2x
I/mobile-ffmpeg: size=     512kB time=00:00:40.26 bitrate= 104.2kbits/s speed=20.1x
I/mobile-ffmpeg: size=     768kB time=00:00:48.22 bitrate= 130.5kbits/s speed=19.3x
I/mobile-ffmpeg: size=     768kB time=00:00:58.49 bitrate= 107.6kbits/s speed=19.5x
I/mobile-ffmpeg: size=    1024kB time=00:01:08.84 bitrate= 121.8kbits/s speed=19.6x
I/mobile-ffmpeg: size=    1024kB time=00:01:18.59 bitrate= 106.7kbits/s speed=19.6x
I/mobile-ffmpeg: size=    1280kB time=00:01:28.76 bitrate= 118.1kbits/s speed=19.7x
I/mobile-ffmpeg: size=    1536kB time=00:01:38.89 bitrate= 127.2kbits/s speed=19.8x
I/mobile-ffmpeg: size=    1536kB time=00:01:49.29 bitrate= 115.1kbits/s speed=19.8x
I/mobile-ffmpeg: size=    1792kB time=00:02:00.04 bitrate= 122.3kbits/s speed=  20x
I/mobile-ffmpeg: size=    2048kB time=00:02:10.31 bitrate= 128.7kbits/s speed=  20x
I/mobile-ffmpeg: size=    2048kB time=00:02:15.44 bitrate= 123.9kbits/s speed=19.3x
I/mobile-ffmpeg: size=    2304kB time=00:02:24.72 bitrate= 130.4kbits/s speed=19.3x
I/mobile-ffmpeg: size=    2304kB time=00:02:35.01 bitrate= 121.8kbits/s speed=19.3x
I/mobile-ffmpeg: size=    2560kB time=00:02:46.71 bitrate= 125.8kbits/s speed=19.6x
I/mobile-ffmpeg: size=    2816kB time=00:02:58.97 bitrate= 128.9kbits/s speed=19.9x
I/mobile-ffmpeg: size=    2976kB time=00:03:06.15 bitrate= 131.0kbits/s speed=19.8x
I/mobile-ffmpeg: video:0kB audio:2921kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:
I/mobile-ffmpeg: 1.876214%
I/mobile-ffmpeg: [aac @ 0x7813a8d300] Qavg: 1044.261
D/mobile-ffmpeg-test: FFmpeg process exited with rc 0.

[pascaaaal]

Sorry for the delay, I tried different things, for example compiling mobile-ffmpeg myself and tweaking some Gradle Settings but nothing worked for arm64-v8a. I tried the App on a different ABI (armabi-v7a) and everything worked fine. I also tried the example code provided by the repo and it worked on arm64-v8a.
I also checked the build, every file is present.
My arm64-v8a device is a Google Pixel 5, I thought it should work on it.
I also have some native code by myself in the app, could that be a problem?

[tanersener]

I also have some native code by myself in the app, could that be a problem?

Yes, it can be. You can understand this by disabling your native code temporarily. Or disabling mobile-ffmpeg if that is easier for you.

[pascaaaal]

If I disable mobile-ffmpeg it works. I use FFmpeg to decode my files. I compile this separately. It may be conflicting with mobile-ffmpeg. Is there way to share these libraries?

[tanersener]

Share?

[pascaaaal]

That I can use the mobile-ffmpeg binaries by my own native code. Eventually this will solve the conflict.
I checked it, I think the problem is, that I use mobile-ffmepg besides a separate FFMpeg (for audio decoding) in the same app. Files like libavcodec conflict because they override themselves in the compiled app.

[tanersener]

I'm not sure how you can do this using the aar files of mobile-ffmpeg. There is a prefab feature in Android to support native dependencies. However mobile-ffmpeg doesn't support prefab.

The only way I can think of is embedding your native code within mobile-ffmpeg and building your own mobile-ffmpeg binary using the build scripts.