SB's H.264 encoder is good where low CPU usage is more important than high bitrate efficiency. Hardware is harder to implement and there are real cost/power constraints that x264 doesn't have to face because it can always just use more time. You're going to get better results with a software encoder. The SB media engine is not really about permanent transcoding. (Sorry to reopen a dormant thread, but SB is shipping soon so this will affect a lot of people)Īnyone who's comparing the performance of the Intel Sandy Bridge media engine to x264 is missing the point. If I was to drop the resolution abit more and clock it I reckon I could hit 1000fps too. X264 : using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 Just because something is good, doesn't mean the other isn't poor. I wont classify it as poor ( yet ), it is only x264 is so good. Encoding something to 640x480 (though personally I really think it was 480x360 as video was for iPod/iPhone but whatever) is not hard. Run a similar test with x264 and see how fast you can encode the clip using preset -fast or -veryfast. The total process took 14 seconds and completed at a rate of roughly 400 frames per second. Intel is being light on the details of the encoder but we saw a demo where Intel took a ~3 minute 1080p 30Mbps source video and transcoded it to a 640 x 360 iPhone video format. The video encode engine is a brand new addition to Sandy Bridge. x264 is already much better optimized and gives much more speed on better quality compared to than this "engine". The actual performance would also be barely enough to encode an 1080p in real time (40-50fps), using some relatively poor quality settings. According to DS which posted something about it on doom9+1, that "engine" is similar to an already existing Broadcom encoder chip and Intel may just have licensed it from them and included it in their chips - if this is the case it's nothing really innovative.
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