如何使用通过 Buildozer 部署到 Android 9.0 平板电脑的 Kivy Python 进行视频流传输？
我的目标是加载 IP 摄像机（我正在使用一些公共 IP 摄像机进行测试）并在框架上进行绘制，然后再将其显示在应用程序中。 OpenCV VideoCapture 不适用于 Android，因此我使用 Kivy 相机/视频/视频播放器。
我通过研究得出的结论是使用
self.camera = Video(source="http://158.58.130.148:80/mjpg/video.mjpg", state='play')
这在我的 Ubuntu 机器上运行得很好，但是，该应用程序只加载黑屏。研究表明存在 Android 权限要求，因此我将以下内容包含在该程序中：
from android.permissions import request_permissions, Permission
并在
Class CameraApp(App):
def build(self):
request_permissions([Permission.INTERNET,
Permission.CAMERA,
Permission.WRITE_EXTERNAL_STORAGE,
Permission.READ_EXTERNAL_STORAGE])
我最初开始使用 Kivy 相机，并且能够在 Android 平板电脑上成功部署和加载相机，并使用 Numpy 对其进行操作。这很好。最终，我用Kivy来画画。
接下来，我尝试使用 Kivy Video 和/或 Video Player 来加载我传输到平板电脑 Movies 目录的视频
self.camera = Video(source="/storage/emulated/0/Movies/MY-TEST-VIDEO.avi", state='play')
但这也会加载黑屏。我检查了日志，没有看到任何“权限被拒绝”错误，因此我不知道这是否是权限问题、编码问题（例如 gstreamer、ffpyplayer ffmpeg，我尝试将其添加到 buildozer.spec 文件中，但没有不起作用）或编程问题。我正在研究在 Android 9.0 API 28 中是否需要请求权限和确认请求？我不知道。
参见链接：如何使用kivy处理android运行时权限 https://stackoverflow.com/questions/47510030/how-to-handle-android-runtime-permission-with-kivy
无论如何，任何想法都非常感激！
谢谢！
Python 3.8
基维1.11.1
建造者1.8
安卓9.0
我的 main.py 在我的 buildozer 目录中：
import kivy
kivy.require('1.11.1') # replace with your current kivy version !
from kivy.app import App
from kivy.graphics.texture import Texture
from kivy.uix.widget import Widget
from kivy.clock import Clock
from kivy.graphics import Rectangle
from kivy.uix.camera import Camera
from kivy.uix.video import Video
from kivy.uix.videoplayer import VideoPlayer
from kivy.core.window import Window
import numpy as np
#from kivy.network.urlrequest import UrlRequest
from android.permissions import request_permissions, Permission, check_permission
class CameraApp(App):
def build(self):
request_permissions([Permission.INTERNET,
Permission.CAMERA,
Permission.WRITE_EXTERNAL_STORAGE,
Permission.READ_EXTERNAL_STORAGE])
self.snapshot = None
self.root = Widget()
self.width = Window.size[0]
self.height = Window.size[1]
# # CAMERA Works
#self.camera = Camera(resolution=(640, 480), size=(self.width, self.height), pos=(100, 100), state='play')
# # IP CAMERA does NOT Work
# # Loads black screen
self.camera = Video(source="http://158.58.130.148:80/mjpg/video.mjpg", state='play')
# # Video file does NOT Work
# self.camera = Video(source='/storage/emulated/0/Movies/MY-TEST-VIDEO.avi', state='play')
Clock.schedule_interval(self.get_texture1, 1.0 / 25.0)
return self.root
def get_texture1(self, event):
self.snapshot = self.camera.texture
if self.snapshot != None:
self.reg = self.snapshot.get_region(0, 0, 50, 50)
# data processing here on numpy array
nparr = np.fromstring(self.camera.texture.pixels, dtype=np.uint8)
# # Just reshape
# a = np.reshape(nparr, (480, 640, 4))
# # Reshape, Flip, Rotate and make Copy of frame
frame_reshaped = np.reshape(nparr, (480, 640, 4))
frame_flipped = np.flip(frame_reshaped, axis=0)
a = np.rot90(frame_flipped, 1)
copy = np.copy(a)
# # Draw on frame
a[50:50+50, 50:50+50] = 255
texture = Texture.create(size=(a.shape[1], a.shape[0]), colorfmt='rgba')
texture.blit_buffer(a.tostring(), bufferfmt='ubyte', colorfmt="rgba")
texture.flip_vertical()
self.root.canvas.clear()
with self.root.canvas:
Rectangle(texture=texture, size=(a.shape[1], a.shape[0]), pos=(100, 100))
if __name__ == "__main__":
CameraApp().run()
我的 buildozer.spec
[app]
# (str) Title of your application
title = Test App
# (str) Package name
package.name = testApp
# (str) Package domain (needed for android/ios packaging)
package.domain = org.testApp
# (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, avi
source.include_exts = py, png, jpg, kv, atlas, avi, jpeg, mjpg, mjpeg
# (list) List of inclusions using pattern matching
# source.include_patterns = assets/*,images/*.png/*.avi
#source.include_patterns = assets/*,data/*.avi
# (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 = 1.0
# (str) Application versioning (method 2)
# version.regex = __version__ = ['"](.*)['"]
# version.filename = %(source.dir)s/main.py
# (list) Application requirements
# comma separated e.g. requirements = sqlite3,kivy, libshine, libx264, ffpyplayer, ffpyplayer_codecs, certifi
#requirements = python3, kivy, numpy, opencv==4.1.1, ffpyplayer
requirements = python3, kivy, numpy, ffpyplayer, ffpyplayer_codecs, libshine, libx264, ffmpeg, certifi, plyer, httplib2
# (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, sensorLandscape, 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, CAMERA, WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE
# (int) Target Android API, should be as high as possible.
#android.api = 27
# (int) Minimum API your APK will support.
#android.minapi = 21
# (int) Android SDK version to use
#android.sdk = 20
# (str) Android NDK version to use
#android.ndk = 19b
# (int) Android NDK API to use. This is the minimum API your app will support, it should usually match android.minapi.
#android.ndk_api = 21
# (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 =
# (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 =
# (bool) If True, then skip trying to update the Android sdk
# This can be useful to avoid excess Internet downloads or save time
# when an update is due and you just want to test/build your package
# android.skip_update = False
# (bool) If True, then automatically accept SDK license
# agreements. This is intended for automation only. If set to False,
# the default, you will be shown the license when first running
# buildozer.
# android.accept_sdk_license = False
# (str) Android entry point, default is ok for Kivy-based app
#android.entrypoint = org.renpy.android.PythonActivity
# (str) Android app theme, default is ok for Kivy-based app
# android.apptheme = "@android:style/Theme.NoTitleBar"
# (list) Pattern to whitelist for the whole project
#android.whitelist =
# (str) Path to a custom whitelist file
#android.whitelist_src =
# (str) Path to a custom blacklist file
#android.blacklist_src =
# (list) List of Java .jar files to add to the libs so that pyjnius can access
# their classes. Don't add jars that you do not need, since extra jars can slow
# down the build process. Allows wildcards matching, for example:
# OUYA-ODK/libs/*.jar
#android.add_jars = foo.jar,bar.jar,path/to/more/*.jar
# (list) List of Java files to add to the android project (can be java or a
# directory containing the files)
#android.add_src =
# (list) Android AAR archives to add (currently works only with sdl2_gradle
# bootstrap)
#android.add_aars =
# (list) Gradle dependencies to add (currently works only with sdl2_gradle
# bootstrap)
#android.gradle_dependencies =
# (list) add java compile options
# this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option
# see https://developer.android.com/studio/write/java8-support for further information
# android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8"
# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
# please enclose in double quotes
# e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
#android.add_gradle_repositories =
# (list) packaging options to add
# see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
# can be necessary to solve conflicts in gradle_dependencies
# please enclose in double quotes
# e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'"
#android.add_gradle_repositories =
# (list) Java classes to add as activities to the manifest.
#android.add_activities = com.example.ExampleActivity
# (str) OUYA Console category. Should be one of GAME or APP
# If you leave this blank, OUYA support will not be enabled
#android.ouya.category = GAME
# (str) Filename of OUYA Console icon. It must be a 732x412 png image.
#android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png
# (str) XML file to include as an intent filters in <activity> tag
#android.manifest.intent_filters =
# (str) launchMode to set for the main activity
#android.manifest.launch_mode = standard
# (list) Android additional libraries to copy into libs/armeabi
#android.add_libs_armeabi = libs/android/*.so
#android.add_libs_armeabi_v7a = libs/android-v7/*.so
#android.add_libs_arm64_v8a = libs/android-v8/*.so
#android.add_libs_x86 = libs/android-x86/*.so
#android.add_libs_mips = libs/android-mips/*.so
# (bool) Indicate whether the screen should stay on
# Don't forget to add the WAKE_LOCK permission if you set this to True
#android.wakelock = False
# (list) Android application meta-data to set (key=value format)
#android.meta_data =
# (list) Android library project to add (will be added in the
# project.properties automatically.)
#android.library_references =
# (list) Android shared libraries which will be added to AndroidManifest.xml using <uses-library> tag
#android.uses_library =
# (str) Android logcat filters to use
#android.logcat_filters = *:S python:D
# (bool) Copy library instead of making a libpymodules.so
#android.copy_libs = 1
# (str) The Android arch to build for, choices: armeabi-v7a, arm64-v8a, x86, x86_64
android.arch = armeabi-v7a
# (int) overrides automatic versionCode computation (used in build.gradle)
# this is not the same as app version and should only be edited if you know what you're doing
# android.numeric_version = 1
#
# Python for android (p4a) specific
#
# (str) python-for-android fork to use, defaults to upstream (kivy)
#p4a.fork = kivy
# (str) python-for-android branch to use, defaults to master
#p4a.branch = master
# (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
#p4a.source_dir =
# (str) The directory in which python-for-android should look for your own build recipes (if any)
#p4a.local_recipes =
# (str) Filename to the hook for p4a
#p4a.hook =
# (str) Bootstrap to use for android builds
# p4a.bootstrap = sdl2
# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
#p4a.port =
#
# iOS specific
#
# (str) Path to a custom kivy-ios folder
#ios.kivy_ios_dir = ../kivy-ios
# Alternately, specify the URL and branch of a git checkout:
ios.kivy_ios_url = https://github.com/kivy/kivy-ios
ios.kivy_ios_branch = master
# Another platform dependency: ios-deploy
# Uncomment to use a custom checkout
#ios.ios_deploy_dir = ../ios_deploy
# Or specify URL and branch
ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
ios.ios_deploy_branch = 1.7.0
# (str) Name of the certificate to use for signing the debug version
# Get a list of available identities: buildozer ios list_identities
#ios.codesign.debug = "iPhone Developer: <lastname> <firstname> (<hexstring>)"
# (str) Name of the certificate to use for signing the release version
#ios.codesign.release = %(ios.codesign.debug)s
[buildozer]
# (int) Log level (0 = error only, 1 = info, 2 = debug (with command output))
log_level = 2
# (int) Display warning if buildozer is run as root (0 = False, 1 = True)
warn_on_root = 1
# (str) Path to build artifact storage, absolute or relative to spec file
# build_dir = ./.buildozer
# (str) Path to build output (i.e. .apk, .ipa) storage
# bin_dir = ./bin
# -----------------------------------------------------------------------------
# List as sections
#
# You can define all the "list" as [section:key].
# Each line will be considered as a option to the list.
# Let's take [app] / source.exclude_patterns.
# Instead of doing:
#
#[app]
#source.exclude_patterns = license,data/audio/*.wav,data/images/original/*
#
# This can be translated into:
#
#[app:source.exclude_patterns]
#license
#data/audio/*.wav
#data/images/original/*
#
# -----------------------------------------------------------------------------
# Profiles
#
# You can extend section / key with a profile
# For example, you want to deploy a demo version of your application without
# HD content. You could first change the title to add "(demo)" in the name
# and extend the excluded directories to remove the HD content.
#
#[app@demo]
#title = My Application (demo)
#
#[app:source.exclude_patterns@demo]
#images/hd/*
#
# Then, invoke the command line with the "demo" profile:
#
#buildozer --profile demo android debug
使用以下命令运行构建器：
buildozer android clean
buildozer -v android debug deploy run logcat > log.txt
日志输出（由于 StackOverflow 的限制，我无法粘贴整个内容，因此为了简洁起见，我发布了调试以及任何被拒绝或失败的内容）：
Warning: failed to apply patch (exit code 1), assuming it is already applied: src/patches/SDLActivity.java.patch
11-27 12:52:00.366 442 578 E storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
11-27 12:52:28.397 428 801 E installd: Failed to delete /data/app/vmdl495936105.tmp: No such file or directory
11-27 12:52:28.447 22226 24752 I Icing : Usage reports ok 1, Failed Usage reports 0, indexed 0, rejected 0
--------- beginning of crash
11-27 12:42:00.784 4773 4773 F DEBUG : #04 pc 000000000000450c /vendor/bin/thermald (main+64)
11-27 12:42:00.784 4773 4773 F DEBUG : #05 pc 00000000000acd3c /system/lib64/libc.so (__libc_init+88)
11-27 12:42:00.810 691 918 W NativeCrashListener: Couldn't find ProcessRecord for pid 4770
11-27 12:42:01.295 691 691 D BroadcastQueue: Add broadcast <BroadcastRecord{35d7874 u-1 android.intent.action.BATTERY_CHANGED}> into [parallel | background], pending size 0
11-27 12:42:01.296 691 1020 D PowerController: isInVideoCallOrNormalCall:mModeConfigIndex:2,preModeConfigIndex = 2
11-27 12:42:01.297 691 705 D BroadcastQueue: Done with parallel broadcast [background] [BroadcastRecord{35d7874 u-1 android.intent.action.BATTERY_CHANGED}]
11-27 12:42:01.299 921 921 D PowerUI : buckets .....20 .. 15 .. 5
11-27 12:42:01.300 921 921 D PowerUI : level 100 --> 100
11-27 12:42:01.300 921 921 D PowerUI : status 5 --> 5
11-27 12:42:01.300 921 921 D PowerUI : plugType 2 --> 2
11-27 12:42:01.300 921 921 D PowerUI : invalidCharger 0 --> 0
11-27 12:42:01.300 921 921 D PowerUI : bucket 1 --> 1
11-27 12:42:01.300 921 921 D PowerUI : plugged true --> true
11-27 12:42:01.300 921 921 D PowerUI : temperature 284
11-27 12:42:01.300 921 921 D PowerUI : health 2 --> 2
11-27 12:42:05.745 4776 4776 F libc : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 in tid 4776 (thermald), pid 4776 (thermald)
11-27 12:42:05.785 4779 4779 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-27 12:42:05.785 4779 4779 F DEBUG : Native Crash TIME: 357109353
11-27 12:42:05.785 4779 4779 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-27 12:42:05.785 4779 4779 F DEBUG : Build fingerprint: 'VANKYO/S20/S20:9/PPR1.180610.011/44403:user/release-keys'
11-27 12:42:05.785 4779 4779 F DEBUG : Revision: '0'
11-27 12:42:05.785 4779 4779 F DEBUG : ABI: 'arm64'
11-27 12:42:05.786 4779 4779 F DEBUG : pid: 4776, tid: 4776, name: thermald >>> /vendor/bin/thermald <<<
11-27 12:42:05.786 4779 4779 F DEBUG : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
11-27 12:42:05.786 4779 4779 F DEBUG : Cause: null pointer dereference
11-27 12:42:05.786 4779 4779 F DEBUG : x0 0000007ae6c2e148 x1 0000005df486a75d x2 0000000000000061 x3 0000000000000063
11-27 12:42:05.786 4779 4779 F DEBUG : x4 0000000000000000 x5 61061f1d1d110200 x6 0002111d1d1f0661 x7 0000002712444675
11-27 12:42:05.786 4779 4779 F DEBUG : x8 0000000000000000 x9 0000000000000000 x10 0000000000000000 x11 000000000000000e
11-27 12:42:05.786 4779 4779 F DEBUG : x12 0000007ae6c0d888 x13 000000000000000d x14 aaaaaaaaaaaaaaab x15 0000007ae6c02f90
11-27 12:42:05.786 4779 4779 F DEBUG : x16 0000005df4885d98 x17 0000007ae7bdf400 x18 0000000000000001 x19 0000007ae6c32780
11-27 12:42:05.786 4779 4779 F DEBUG : x20 0000007ae6c55070 x21 0000007ae6c2e120 x22 0000007ae6c32828 x23 0000007ae6c32810
11-27 12:42:05.786 4779 4779 F DEBUG : x24 0000000000000001 x25 0000000000000000 x26 0000000000000002 x27 0000000000000000
11-27 12:42:05.786 4779 4779 F DEBUG : x28 0000000000000000 x29 0000007fea18d1b0
11-27 12:42:05.786 4779 4779 F DEBUG : sp 0000007fea18d170 lr 0000005df48620e8 pc 0000005df4862118
11-27 12:42:05.790 4779 4779 F DEBUG :
11-27 12:42:05.790 4779 4779 F DEBUG : backtrace:
11-27 12:42:05.790 4779 4779 F DEBUG : #00 pc 000000000000c118 /vendor/bin/thermald (android::CvtGovernor::CvtGovernor(android::ThermalSensor*)+628)
11-27 12:42:05.790 4779 4779 F DEBUG : #01 pc 000000000000b1f8 /vendor/bin/thermald (android::ThermalXmlParser::getSensorArgs(tinyxml2::XMLElement*)+708)
11-27 12:42:05.790 4779 4779 F DEBUG : #02 pc 000000000000abc0 /vendor/bin/thermald (android::ThermalXmlParser::initSensorsFromXml()+876)
11-27 12:42:05.790 4779 4779 F DEBUG : #03 pc 0000000000004998 /vendor/bin/thermald (android::ThermalManager::run()+36)
11-27 12:42:05.790 4779 4779 F DEBUG : #04 pc 000000000000450c /vendor/bin/thermald (main+64)
11-27 12:42:05.790 4779 4779 F DEBUG : #05 pc 00000000000acd3c /system/lib64/libc.so (__libc_init+88)
11-27 12:42:05.814 691 918 W NativeCrashListener: Couldn't find ProcessRecord for pid 4776
11-27 12:42:07.280 691 1026 D SSense : onTouchRateChanged: rate:0.021484375
11-27 12:42:09.177 691 828 V NetworkStats: performPollLocked(flags=0x1)
11-27 12:42:09.198 691 828 D BroadcastQueue: Add broadcast <BroadcastRecord{737d19d u-1 com.android.server.action.NETWORK_STATS_UPDATED}> into [parallel | background], pending size 0
11-27 12:42:09.198 691 705 D BroadcastQueue: Done with parallel broadcast [background] [BroadcastRecord{737d19d u-1 com.android.server.action.NETWORK_STATS_UPDATED}]
11-27 12:42:09.198 691 829 V NetworkPolicy: updateNetworkEnabledNL()
11-27 12:42:09.199 691 829 V NetworkPolicy: updateNotificationsNL()
11-27 12:47:06.142 5217 5217 V PythonActivity: onRequestPermissionsResult()
11-27 12:47:06.142 5217 5217 V PythonActivity: onRequestPermissionsResult passed to callback
11-27 12:52:27.198 15855 5754 W Settings: Setting install_non_market_apps has moved from android.provider.Settings.Global to android.provider.Settings.Secure, returning read-only value.
11-27 12:52:27.213 15855 5754 W PackageParser: Ignoring duplicate uses-permissions/uses-permissions-sdk-m: android.permission.WRITE_EXTERNAL_STORAGE in package: org.testapp.testapp at: Binary XML file line #29
Thanks!
