mediacodec

I'm trying to record, encode and finally create a short movie on Android (using API 16) with a combination of MediaCodec and Mp4Parser (to encapsulate into .mp4). Everything is working just fine, except for the duration of the .mp4: its always 3 seconds long - and runs at about twice the 'right' speed. The input to encoder is 84 frames (taken 100ms apart). The last frame sets the 'end of stream' flag. I set the presentation time for each frame on queueInputBuffer I've tried to tweak every conceivable parameter - but nothing seems to make a difference - the film is always 3 seconds long - and

一、引言： 本博客涉及的内容是mediacodec从create到config过程中native层的逻辑分析，mediacodec在应用层的逻辑时序图如下（create->start）: 二、create的native层代码分析： 进入到native层之后，mediacodec会先去实例化本体对象，然后执行init操作， init函数关键代码贴出如下： MediaCodec . cpp status_t MediaCodec :: init ( const AString & name , bool nameIsType , bool encoder ) { . . . /* 1.实例化ACodec */ mCodec = new ACodec ; . . . /* 2.在MediaCodec中实例化一个ALooper，用于ACodec进行消息传送 */ if ( needDedicatedLooper ) { if ( mCodecLooper == NULL ) { mCodecLooper = new ALooper ; mCodecLooper - > setName ( "CodecLooper" ) ; mCodecLooper - > start ( false , false , ANDROID_PRIORITY_AUDIO ) ; } mCodecLooper -

I am trying to add functionality to extract, decode, edit, encode and mux a video on Android. Therefore, I found some very useful implementation, which is part of the Android CTS ExtractDecodeEditEncodeMuxTest . Unfortunately, the code only works if it is executed as part of the testcase. I tried to execute it from a normal activity and get: E/ExtractDecodeEditEncodeMuxTest (18781): java.lang.IllegalStateException: Failed to stop the muxer W/System.err(18781): java.lang.RuntimeException: Surface frame wait timed out W/System.err(18781): at ...OutputSurface.awaitNewImage(OutputSurface.java:216)

Android中使用MediaExtractor+MediaCodec+MediaMuxer实现将本地视频解码截取再和另外的视频进行拼接编码合成一个视频，主要有两个类。 下面是解码相关的类VideoDecoder.java package com . audiovideo . camera . decoder ; import android . media . MediaCodec ; import android . media . MediaCodecInfo ; import android . media . MediaCodecList ; import android . media . MediaExtractor ; import android . media . MediaFormat ; import android . os . Handler ; import android . os . HandlerThread ; import android . support . annotation . NonNull ; import android . util . Log ; import android . widget . Toast ; import com . audiovideo . camera . MyApplication ;

Is there a way to extract the maximum video resolution Android can play? We have MP4 files we download from the camera and I would like to show some error to the user before playing. Because if the resolution is too high, Android will just give you a black screen. I tried using the camcorder profile, but this one is giving me most of the time 1920x1080 even on devices that can handle higher resolutions such as the Galaxy S5. CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH); Any help is really appreciated! Florian Okay, on Android Lollipop you can use this, MediaCodecInfo.VideoCapabilities