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POaccelerate x264 encoding
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  1. POaccelerate x264 encoding
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    copied!<p>i am making use of x264 to encode raw data captured from the iphone camera .. but the encoding is very slow .Can anyone help me accelerate the encoding speed.</p> <p>I have used following settings to build x264 lib:</p> <p>//for armv6</p> <p>CC=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure --host=arm-apple-darwin --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --prefix='dist' --extra-cflags='-arch armv6' --extra-ldflags=-L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/system/ --extra-ldflags='-arch armv6' --enable-pic --disable-asm </p> <p>//for armv7</p> <p>CC=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure --host=arm-apple-darwin --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --prefix='dist' --extra-cflags='-arch armv7' --extra-ldflags=-L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/system/ --extra-ldflags='-arch armv7' --enable-pic</p> <p>I am using default preset like this:</p> <pre><code>x264_param_default_preset(param, "slow", "zerolatency"); </code></pre> <p>and setting few perameters:</p> <pre><code>param-&gt;i_bframe = 0; param-&gt;analyse.i_me_method = X264_ME_HEX; param-&gt;analyse.i_subpel_refine = 2; param-&gt;i_frame_reference = 1; param-&gt;analyse.b_mixed_references = 0; param-&gt;analyse.i_trellis = 0; param-&gt;rc.b_mb_tree = 0; param-&gt;analyse.i_weighted_pred = X264_WEIGHTP_NONE; param-&gt;rc.i_bitrate = 180; param-&gt;rc.i_qp_min = 20; param-&gt;rc.i_qp_max = 26; param-&gt;i_keyint_max = 15; param-&gt;i_keyint_min = 15; param-&gt;i_width = w; param-&gt;i_height = h; x264_param_apply_profile(param, "baseline"); x264_picture_alloc( &amp;(enc-&gt;pic), X264_CSP_I420, param-&gt;i_width, param-&gt;i_height ); </code></pre>
 

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