For media streaming such as HLS or MPEG-DASH, there is a mechanism called Adaptive Bitrate (ABR), which makes it possible to switch between multiple resolutions based on the network bandwidth. It helps reduce network usage and keep a video playing at the maximum resolution that a player is currently capable…

With ExoPlayer, seek operation can be done by player.seekTo(positionMs). In this post, I will look into how seeking can be archived inside ExoPlayer. To be specific, I will address these two. How accurate ExoPlayer can seek, and why. How fast ExoPlayer can seek and why. *) This post is based…

Sometimes, you may have some situation where you want to limit video resolution, for example, when a user explicitly set the max resolution from the setting or when a playback surface size is too small and you do not need to get the higher resolutions. Set Max Bitrate ExoPlayer provides a way of…

Debugging Problem When a playback fails with some ExoPlaybackException, it’s relatively easier to know what’s is wrong and how to fix it, but how do you solve some non-crash problems like playback stalls for a very short time under certain conditions, or output surface flickers on a specific device. This is a…

Decoders and Encoders are very important components when handling media sources, and Android devices have multiple decoders/encoders on them. While Android supports a different kind of codecs and container formats, Android API provides ways to decode/encode those specific data. MediaCodec can be used to access a certain encoder/decoder components on…

In the previous article, I wrote about what is Multi-key and how to create sample multi-key contents. In this article, I will explain how to play them. If you have not read the previous article, I would recommend to read this first. MediaDrmCallback In ExoPlayer, MediaDrmCallback.java is responsible for requesting keys…

Digital rights management, or you could just refer to it as DRM, is a way of controlling what users can do with some sort of digital content. To protect the content, the decryption key is stored in a license server, then the player gets the license key from the license…

JvmStatic annotation Kotlin has a JvmStatic annotation, and in this article, I will go through about what JvmStatic annotation does and the necessity of it. If you add @JvmStatic to functions, in acompanion object scope like this below, you can access it like Greeter.hello() from Java code. What JvmStatic annotation does To know what JvmStatic annotation…

LiveData + Navigation LivaData helps you observe data. Navigation helps you manage transitions. However, when you use both there is something you have to pay extra attention to. Let’s think of a situation where you develop a single-activity app with two fragments in it. (MainActivity, Fragment1, Fragment2.)