Adds fast seeking for exoplayer. (Note: it also depends on the amount of video encoding, mainly IDR Frames)

Programming language: Kotlin
License: Apache License 2.0
Tags: Kotlin     RxAndroid     RxJava     Android-library     Kotlin Library     Exoplayer     Seeking     Fast    
Latest version: v1.0.1

FastExoPlayerSeeker alternatives and similar packages

Based on the "Kotlin" category.
Alternatively, view FastExoPlayerSeeker alternatives based on common mentions on social networks and blogs.

Do you think we are missing an alternative of FastExoPlayerSeeker or a related project?

Add another 'Kotlin' Package


Donation About Jan Rabe

FastExoPlayerSeeker Javadoc Build Status API Gradle Version kotlin Licence androidx


Adds fast seeking for exoplayer. (Note: it also depends on the amount of video encoding, mainly IDR Frames)


How to install

repositories {
    maven {
        url "https://jitpack.io"

dependencies {
    implementation 'com.github.kibotu:FastExoPlayerSeeker:-SNAPSHOT'

How to use

Create Emitter

val emitter = SeekPositionEmitter()

Create Observable

        logv("seekTo=${it.first} isSeeking=${it.second}")
    }, { loge("${it.message}") })
    .addTo(subscriptions) // don't forget to dispose when you're done!


I've had good results increasing the amount if IDR frames using the following script which in term will help exoplayer snap to those sync frames and improve scrubbing.

#!/usr/bin/env bash
# change iframe rate
# https://gist.github.com/kibotu/27c5d665d19b9f782e6b4f26eff878b1
# https://ffmpeg.org/ffmpeg-formats.html#mov_002c-mp4_002c-ismv
# -movflags faststart
#  Run a second pass moving the index (moov atom) to the beginning of the file. This operation can take a while, and will not work in various situations such as fragmented output, thus it is not enabled by default.
# -movflags rtphint
#  Add RTP hinting tracks to the output file.
# -c:v libx264
# -c codec codec name
# -profile profile set profile
# Another optional setting is -profile:v which will limit the output to a specific H.264 profile.
# Omit this unless your target device only supports a certain profile (see Compatibility).
# Current profiles include: baseline, main, high, high10, high422, high444. Note that usage of -profile:v is incompatible with lossless encoding.
# https://trac.ffmpeg.org/wiki/Encode/H.264
# https://trac.ffmpeg.org/wiki/Encode/H.264#Compatibility
#  -keyint_min E..Vโ€ฆ. minimum interval between IDR-frames (from INT_MIN to INT_MAX) (default 25)
ffmpeg -i inputvide.mp4 -c:v libx264 -profile:v baseline -level 3.0 -x264opts keyint=10:min-keyint=10 -g 10 -movflags +faststart+rtphint -maxrate:v 4000k -bufsize:v 4500k outputvideo.mp4

How to build

graldew clean build


gradlew clean assembleRelease test javadoc

Build Requirements

  • JDK8
  • Android Build Tools 29.0.2
  • Android SDK 29


Follow me on Twitter: @wolkenschauer

Let me know what you think: [email protected]

Contributions welcome!


Copyright 2019 Jan Rabe

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

*Note that all licence references and agreements mentioned in the FastExoPlayerSeeker README section above are relevant to that project's source code only.