Android Java wrapper around ffmpeg command line binary

Guardian Project

Last update: Dec 5, 2022

Related tags

Media android-ffmpeg-java

Overview

FFMPEG Library for Android

This project is a Java wrapper around an ffmpeg command line binary for use in Android applications. It depends on the android-ffmpeg project to provide the ffmpeg binary.

For ease of developer use, we've included the FFMPEG and Sox binaries in the project, however, we strongly recommend you compile them yourselves using the steps below.

It is licensed under the GPLv3.

Building

Ensure NDK_BASE env variable is set to the location of your NDK, example:

export NDK_BASE=/path/to/android-ndk

Then execute:

git submodule update --init --recursive
cd external/android-ffmpeg
./configure_make_everything.sh

Once compiled, you will find the binaries at:

external/android-ffmpeg/ffmpeg/ffmpeg external/android-ffmpeg/data/data/info.guardianproject.ffmpeg/app_opt/bin/sox

You should replace the files in res/raw with these.

Then build the project in Eclipse.

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Comments

Modified execute commands to always use US for the Locale

We were having issues with our generated ffmpeg commands breaking because the Locale was set to China. Our command strings were containing characters that ffmpeg couldn't interpret. So instead of checking for the locale at every ffmpeg call, we felt it would be better to handle at the source.

opened by micahjlucas 3
Sprint2 filters

Adding two fiters for sprint 2 work, photo/video cropping and rotation.

https://dev.guardianproject.info/issues/129 https://dev.guardianproject.info/issues/130

opened by n8fr8 2
Simple sox support (w/ crossfader)
Requires changes from my android-ffmpeg sox branch.

Installs sox binary like we do the ffmpeg binary

Crossfader class that performs crossfade is a composition of...

...a few rudimentary sox cli actions
opened by abeluck 1
moved the input file before the start time to improve precision

The behaviour of ffmpeg depends on the order of the command line arguments and I found that when trimming a clip the precision on the start time and duration is much improved when the input file is given as an argument before the start time and end time.

For example during my test the command:

ffmpeg -y -ss 1 -t 3 -i input.mp4 -strict -2 output.mp4

trim a clip with 4 seconds duration while the command:

ffmpeg -y -i input.mp4 -ss 1 -t 3 -strict -2 output.mp4

output a video with exactly 3 seconds duration.

Therefore I suggest this small change to the code or at least to give the option to reorder the arguments if needed.

opened by e-massa 1