ffmpeg, python3: include executable

[T-Dynamos]

Closes #3137

Notes:

• https://github.com/agnostic-apollo/Android-Docs/blob/master/site/pages/en/projects/docs/apps/processes/app-data-file-execute-restrictions.md#apk-native-library
• python binary is just 8KB
• ffmpeg binary is about 252K or around 0.25MB

Test code:

# importing android is expensive (~1–2s on low-end devices); avoid at startup
# but it is required for setting up paths
import android

import subprocess


print(subprocess.run(
    ["ffmpeg", "-version"],
    capture_output=True,
    text=True
).stdout)


cmd = [
    "ffmpeg",
    "-f", "lavfi",                 
    "-i", "testsrc=size=128x128:rate=30",
    "-t", "2",                      
    "-c:v", "mpeg4",                
    "-f", "null",                   
    "-"
]

res = subprocess.run(cmd, capture_output=True, text=True)
print("Encoding test stdout:\n", res.stdout)
print("Encoding test stderr:\n", res.stderr)

Expected Output:

1-02 00:04:57.250 19715 19737 I python  : Initializing Python for Android
01-02 00:04:57.250 19715 19737 I python  : Setting additional env vars from p4a_env_vars.txt
01-02 00:04:57.251 19715 19737 I python  : Changing directory to the one provided by ANDROID_ARGUMENT
01-02 00:04:57.251 19715 19737 I python  : /data/user/0/org.tdynamos.earthfm/files/app
01-02 00:04:57.252 19715 19737 I python  : Preparing to initialize python
01-02 00:04:57.252 19715 19737 I python  : _python_bundle dir exists
01-02 00:04:57.252 19715 19737 I python  : set wchar paths...
01-02 00:04:57.451 19715 19737 I python  : Initialized python
01-02 00:04:57.452 19715 19737 I python  : testing python print redirection
01-02 00:04:57.456 19715 19737 I python  : Android path ['.', '/data/user/0/org.tdynamos.earthfm/files/app/_python_bundle/stdlib.zip', '/data/user/0/org.tdynamos.earthfm/files/app/_python_bundle/modules', '/data/user/0/org.tdynamos.earthfm/files/app/_python_bundle/site-packages']
01-02 00:04:57.456 19715 19737 I python  : Android kivy bootstrap done. __name__ is __main__
01-02 00:04:57.456 19715 19737 I python  : AND: Ran string
01-02 00:04:57.456 19715 19737 I python  : Run user program, change dir and execute entrypoint
01-02 00:04:59.291 19715 19737 I python  : Symlink executable: libffmpegbin.so -> ffmpeg
01-02 00:04:59.790 19715 19737 I python  : ffmpeg version 4a78056 Copyright (c) 2000-2024 the FFmpeg developers
01-02 00:04:59.790 19715 19737 I python  : built with Android (13624864, +pgo, +bolt, +lto, +mlgo, based on r530567e) clang version 19.0.1 (https://android.googlesource.com/toolchain/llvm-project 97a699bf4812a18fb657c2779f5296a4ab2694d2)
01-02 00:04:59.790 19715 19737 I python  : configuration: --enable-jni --enable-mediacodec --enable-openssl --enable-nonfree --enable-protocol='https,tls_openssl' --enable-parser='aac,ac3,h261,h264,mpegaudio,mpeg4video,mpegvideo,vc1' --enable-decoder='aac,h264,mpeg4,mpegvideo' --enable-muxer='h264,mov,mp4,mpeg2video' --enable-demuxer='aac,h264,m4v,mov,mpegvideo,vc1,rtsp' --disable-symver --disable-doc --enable-filter='aresample,resample,crop,adelay,volume,scale' --enable-protocol='file,http,hls,udp,tcp' --enable-small --enable-hwaccels --enable-pic --disable-static --disable-debug --enable-shared --target-os=android --enable-cross-compile --cross-prefix=aarch64-linux-android24- --arch=aarch64 --strip=/home/tdynamos/.buildozer/android/platform/android-ndk-r28c/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip --sysroot=/home/tdynamos/.buildozer/android/platform/android-ndk-r28c/toolchains/llvm/prebuilt/linux-x86_64/sysroot --enable-neon --prefix=/home/tdynamos/EarthFM/.buildozer/android/platform/build-arm64-v8a/build/other_builds/ffmpeg/arm64-v8a__ndk_target_24/ffmpeg
01-02 00:04:59.790 19715 19737 I python  : libavutil      58. 29.100 / 58. 29.100
01-02 00:04:59.790 19715 19737 I python  : libavcodec     60. 31.102 / 60. 31.102
01-02 00:04:59.790 19715 19737 I python  : libavformat    60. 16.100 / 60. 16.100
01-02 00:04:59.790 19715 19737 I python  : libavdevice    60.  3.100 / 60.  3.100
01-02 00:04:59.790 19715 19737 I python  : libavfilter     9. 12.100 /  9. 12.100
01-02 00:04:59.790 19715 19737 I python  : libswscale      7.  5.100 /  7.  5.100
01-02 00:04:59.790 19715 19737 I python  : libswresample   4. 12.100 /  4. 12.100

[kuzeyron]

makedirs(path, exist_ok=True) so if statement is not needed

[kuzeyron]

Instead of print, try using logging instead

[T-Dynamos]

Ah I think that would be overkill.

This would require to setup logger in android module itself, which will increase startup time.

[kuzeyron]

Would be nice having. And perhaps add logging for the rest of the file. I don't think a setup is actually needed so python can automatically deal with it