roomspana.blogg.se - Android ffmpeg library

Converting a video from one format to another.

There are many uses of ffmpeg given below :. Android natively offers APIs that enable video processing and various video effects.This tutorial teaches you about how to use integrate and use ffmpeg library in your android applicaation which is helpful tool that can be used to edit or convert videos and audios.It includes libavcodec – the audio/video codec library. I used some of these APIs already in my previous projects. MediaCodec and OpenGL ES are the main parts that enabled video processing. I'm planning to use MediaCodec and OpenGL ES also in my future video editing projects and one of the features that I've found would be cool to implement is reversing video, so that it can be played backwards. I know that it's possible to implement this feature using ffmpeg or some other external library, but I was curious how to do this using only the standard Android APIs. In this post I describe my experience implementing this feature. I created a little test project that allows to reverse the video in background service.

If you're interested in video processing using only Android's standard API's (especially MediaCodec), I also recommend to check out my other postsĪdding text or other textures to existing video You can find the sample project at github. If you you're an Android enthusiast that likes to learn more about Android internals, I highly recommend to check out my Bugjaeger app. It allows you to connect 2 Android devices through USB OTG and perform many of the tasks that are normally only accessible from a developer machine via ADB directly from your Android phone/tablet. I used an approach similar to my previous posts. I again used MediaExtractor to get the encoded frames from a video file and I used MediaCodec to encode the frames in reverse order. This time I didn't implement any special effects, so I didn't need to use OpenGL. This also made Surface initialization easier because I didn't need to use EGL for surface initialization and I just use the surface handed over from MediaCodec encoder. MediaExtractors offers the seekTo which was the key method to implement the algorithm for reverting video.