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Specifying FFMPEG in the requirements section of 'buildozer.spec' causing [libavformat/network.o] Error 1
18 juillet 2022, par GJ78My question relates to how to mitigate an ffmpeg requirement listed in a buildozer.spec that is causing compile errors using buildozer.



GOAL :



Using buildozer to ensure FFMPEG can be embedded within a small Kivy app so i can utilise youtube_dl functionality on my android phone.



THE ISSUE :
Specifying FFMPEG in the requirements section of 'buildozer.spec' causes the following error message :

common.mak:60 : recipe for target 'libavformat/network.o' failed

make : [libavformat/network.o] Error 1

make : Waiting for unfinished jobs...


What have I done to resolve myself :

1. Ensured LOG LEVEL 2 is specified.


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Upgraded cython from Version 21 to 27. Then downgraded to 25, then 21 then 20 to see if this resolved anything. It didn't.
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In BUILDOZER.SPEC, switched between Android NDK crystax-ndk-10.3.2 and android-ndk-r16b. (Note have reverted back to Crystax 10.3.2) in my NDK PATH.
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In BUILDOZER.SPEC, changed android.api from 19 to 15 (just to see if this has any positive effects).
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executed : rm -Rf .buildozer between each compiling attempt.
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Part extract of Buildozer.log :



In file included from libavformat/dump.c:37:0 :

libavformat/avformat.h:893:21 : note : declared here

 AVCodecContext codec ;
 ^

CC libavformat/format.o

CC libavformat/golomb_tab.o

CC libavformat/h264dec.o

CC libavformat/hevc.o

CC libavformat/http.o

CC libavformat/httpauth.o

CC libavformat/id3v1.o

CC libavformat/id3v2.o

CC libavformat/img2.o

CC libavformat/isom.o

CC libavformat/log2_tab.o

CC libavformat/m4vdec.o

CC libavformat/metadata.o
CC libavformat/mov_chan.o

CC libavformat/mov.o

CC libavformat/movenc.o

CC libavformat/movenccenc.o

CC libavformat/movenchint.o

CC libavformat/mpegvideodec.o

CC libavformat/mux.o

CC libavformat/network.o

In file included from libavformat/network.h:29:0,

 from libavformat/network.c:22 :

libavformat/os_support.h:67:32 : error : expected declaration specifiers or '...' before '(' token

 # define lseek(f,p,w) lseek64((f), (p), (w))

 ^
libavformat/os_support.h:67:37 : error : expected declaration specifiers or '...' before '(' token

 # define lseek(f,p,w) lseek64((f), (p), (w))

 ^
libavformat/os_support.h:67:42 : error : expected declaration specifiers or '...' before '(' token

 # define lseek(f,p,w) lseek64((f), (p), (w))

 ^
common.mak:60 : recipe for target 'libavformat/network.o' failed

make : [libavformat/network.o] Error 1

make : * Waiting for unfinished jobs.... -
Part extract of Buildozer.spec



(str) Title of your application



title = myapplication



(str) Package name



package.name = myapp



(str) Package domain (needed for android/ios packaging)



package.domain = org.test



(str) Source code where the main.py live



source.dir = .



(list) Source files to include (let empty to include all the files)



source.include_exts = py,png,jpg,kv,atlas



(list) List of inclusions using pattern matching



source.include_patterns = assets/,images/.png



(list) Source files to exclude (let empty to not exclude anything)



source.exclude_exts = spec



(list) List of directory to exclude (let empty to not exclude anything)



source.exclude_dirs = tests, bin



(list) List of exclusions using pattern matching



source.exclude_patterns = license,images//.jpg



(str) Application versioning (method 1)



version = 0.1



(str) Application versioning (method 2)



version.regex = version = '"['"]



version.filename = %(source.dir)s/main.py



(list) Application requirements



comma seperated e.g. requirements = sqlite3,kivy



requirements = ffmpeg,python2,hostpython2,kivy,youtube-dl



(str) Custom source folders for requirements



Sets custom source for any requirements with recipes



requirements.source.kivy = ../../kivy



(list) Garden requirements



garden_requirements =



(str) Presplash of the application



presplash.filename = %(source.dir)s/data/presplash.png



(str) Icon of the application



icon.filename = %(source.dir)s/data/icon.png



(str) Supported orientation (one of landscape, portrait or all)



orientation = portrait



(list) List of service to declare



services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY



OSX Specific



author = © Copyright Info



change the major version of python used by the app



osx.python_version = 3



Kivy version to use



osx.kivy_version = 1.9.1



Android specific



(bool) Indicate if the application should be fullscreen or not



fullscreen = 0



(string) Presplash background color (for new android toolchain)



Supported formats are : #RRGGBB #AARRGGBB or one of the following names :



red, blue, green, black, white, gray, cyan, magenta, yellow, lightgray,



darkgray, grey, lightgrey, darkgrey, aqua, fuchsia, lime, maroon, navy,



olive, purple, silver, teal.



android.presplash_color = #FFFFFF



(list) Permissions



android.permissions = INTERNET



(int) Android API to use



android.api = 19



(int) Minimum API required



android.minapi = 9



(int) Android SDK version to use



android.sdk = 20



(str) Android NDK version to use



android.ndk = 10.3.2



(bool) Use —private data storage (True) or —dir public storage (False)



android.private_storage = True



(str) Android NDK directory (if empty, it will be automatically downloaded.)



android.ndk_path = /home/gjones/Downloads/crystax-ndk-10.3.2



(str) Android SDK directory (if empty, it will be automatically downloaded.)



android.sdk_path =



(str) ANT directory (if empty, it will be automatically downloaded.)



android.ant_path =
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Lastly, when I remove ffmpeg from requirements in buildozer.spec, the .APK compiles successfully and i can deploy it on to my phone with the KIVY GUI. Obviously, ffmpeg functionality is not present.

















Current Environment Specs :



- 

- Running Linux Mint 17.2 as a Virtual Box VM
- Buildozer Version : 0.35dev
- Cython Version : 0.25









Any advice would be greatly appreciated.



Lastly, if there is no obvious solution via buildozer, do i need to compile ffmpeg for Android separately and somehow include this somewhere in the buildozer spec file to prevent this error message ?



Thanks in advance.


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