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    copied!<p>I ran in to this error (-16 on start) and found out it was caused by using an unsupported resolution.</p> <p>First you have to get the optimal size from the supported sizes </p> <pre><code>Parameters params = camera.getParameters(); List&lt;Size&gt; sizes = params.getSupportedPreviewSizes(); optimalSize = getOptimalPreviewSize(sizes, width, height); params.setPreviewSize(optimalSize.width, optimalSize.height); </code></pre> <p>Then make sure you set both preview and video to the same size (if they were different in my experience preview would freeze when video record started):</p> <pre><code>mediaRecorder.setVideoSize(optimalSize.width, optimalSize.height); </code></pre> <p>(sample code for getOptimalPreviewSize is from android sdk)</p> <pre><code>private Size getOptimalPreviewSize(List&lt;Size&gt; sizes, int w, int h) { final double ASPECT_TOLERANCE = 0.1; double targetRatio = (double) w / h; if (sizes == null) return null; Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = h; // Try to find an size match aspect ratio and size for (Size size : sizes) { double ratio = (double) size.width / size.height; if (Math.abs(ratio - targetRatio) &gt; ASPECT_TOLERANCE) continue; if (Math.abs(size.height - targetHeight) &lt; minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } // Cannot find the one match the aspect ratio, ignore the requirement if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Size size : sizes) { if (Math.abs(size.height - targetHeight) &lt; minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize; } </code></pre>
 

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