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    <p>Use the <a href="http://developer.android.com/reference/android/media/MediaCodec.html" rel="noreferrer">MediaCodec</a> API with <code>CONFIGURE_FLAG_ENCODE</code> to set it up as an encoder. No ffmpeg required :)</p> <p>You've already found how to grab the screen in the other question you linked to, now you just need to feed each captured frame to <code>MediaCodec</code>, setting the appropriate format flags, timestamp, etc.</p> <p><strong>EDIT:</strong> Sample code for this was hard to find, but <a href="https://android.googlesource.com/platform/cts/+/6289d680cb75fa5a985464b9f362d4a2a007a7bf%5E!/#F0" rel="noreferrer">here it is</a>, hat tip to Martin Storsjö. Quick API walkthrough:</p> <pre><code>MediaFormat inputFormat = MediaFormat.createVideoFormat("video/avc", width, height); inputFormat.setInteger(MediaFormat.KEY_BIT_RATE, bitRate); inputFormat.setInteger(MediaFormat.KEY_FRAME_RATE, frameRate); inputFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, colorFormat); inputFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 75); inputFormat.setInteger("stride", stride); inputFormat.setInteger("slice-height", sliceHeight); encoder = MediaCodec.createByCodecName("OMX.TI.DUCATI1.VIDEO.H264E"); // need to find name in media codec list, it is chipset-specific encoder.configure(inputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE); encoder.start(); encoderInputBuffers = encoder.getInputBuffers(); encoderOutputBuffers = encoder.getOutputBuffers(); byte[] inputFrame = new byte[frameSize]; while ( ... have data ... ) { int inputBufIndex = encoder.dequeueInputBuffer(timeout); if (inputBufIndex &gt;= 0) { ByteBuffer inputBuf = encoderInputBuffers[inputBufIndex]; inputBuf.clear(); // HERE: fill in input frame in correct color format, taking strides into account // This is an example for I420 for (int i = 0; i &lt; width; i++) { for (int j = 0; j &lt; height; j++) { inputFrame[ i * stride + j ] = ...; // Y[i][j] inputFrame[ i * stride/2 + j/2 + stride * sliceHeight ] = ...; // U[i][j] inputFrame[ i * stride/2 + j/2 + stride * sliceHeight * 5/4 ] = ...; // V[i][j] } } inputBuf.put(inputFrame); encoder.queueInputBuffer( inputBufIndex, 0 /* offset */, sampleSize, presentationTimeUs, 0); } int outputBufIndex = encoder.dequeueOutputBuffer(info, timeout); if (outputBufIndex &gt;= 0) { ByteBuffer outputBuf = encoderOutputBuffers[outputBufIndex]; // HERE: read get the encoded data encoder.releaseOutputBuffer( outputBufIndex, false); } else { // Handle change of buffers, format, etc } } </code></pre> <p>There are also some <a href="http://code.google.com/p/android/issues/detail?id=37769" rel="noreferrer">open issues</a>.</p> <p><strong>EDIT:</strong> You'd feed the data in as a byte buffer in one of the supported pixel formats, for example I420 or NV12. There is unfortunately no perfect way of determining which formats would work on a particular device; however it is typical for the same formats you can get from the camera to work with the encoder.</p>
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    1. POCreate video from screen grabs in android
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    1. COThanks, will check it out.
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    2. COHi been researching a bit but there aren'tmany examples out there.. how would I actually feed each captured frame into MediaCodec?
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    3. COHi Alex, Thanks for all the code. Say I had a series of images, say image01.png, image02.png,... etc, each of these would be assigned to the variable "inputFrame" and then eventually put into the ByteBuffer variable "inputBuf"?
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