mediamuxer

I am doing android video recording using mediacodec + mediamuxer, and now I can record video and generate mp4 file which can be played. The problem is that I find the recorded video will seize for about one second some time. So I launched traceview and I find MediaMuxer.nativeWriteSampleData() cause the problem. Sometimes this function is very fast and returns within several micro-seconds, but sometimes this function is very slow and will consume about one second or so, and the video blocks at that time. I do not know why this function will perform so varying from time to time. The recording

Background Over the past few days, I've worked on making a customizable, more updated version of a library for video trimming, here (based on this library ) The problem While for the most part, I've succeeded making it customizable and even converted all files into Kotlin, it had a major issue with the trimming itself. It assumes the input is always a File, so if the user chooses an item from the apps chooser that returns a Uri, it crashes. The reason for this is not just the UI itself, but also because a library that it uses for trimming ( mp4parser ) assumes an input of only File (or

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)

I'm trying to record the screen with MediaProjection API. I want to trim the video that was recorded by the media projection. Is there a way to do that without using any 3rd party dependency? mnagy After lots of digging, I found this snippet /** * @param srcPath the path of source video file. * @param dstPath the path of destination video file. * @param startMs starting time in milliseconds for trimming. Set to * negative if starting from beginning. * @param endMs end time for trimming in milliseconds. Set to negative if * no trimming at the end. * @param useAudio true if keep the audio track

I am trying to concatenate multiple mp4 audio files (each containing only one audio track, all recorded with the same MediaRecorder and the same parameters) into one using the following function: @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) public static boolean concatenateFiles(File dst, File... sources) { if ((sources == null) || (sources.length == 0)) { return false; } boolean result; MediaExtractor extractor = null; MediaMuxer muxer = null; try { // Set up MediaMuxer for the destination. muxer = new MediaMuxer(dst.getPath(), MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4); // Copy the