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<blockquote data-quote="Lifeisabeach" data-source="post: 1234210" data-attributes="member: 38864">Before my response here, I should mention that I used &quot;x264&quot; incorrectly, and it's frequently confused with h.264, myself included.&nbsp; I had to do some followup reading to clear my mind on this, and here's my understanding:&nbsp; x264 is an encoder, and h.264 (aka AVC) is a codec.&nbsp; As an alternative, x264 can also encode to VC-1, a competitor to h.264.&nbsp; Apple's public hardware-decoding API is for h.264 and does NOT support VC-1.That said… I have an i3 (mid-2010 iMac), but that's not really the point.&nbsp; Point is, I'm having identical results with an h.264 (AVC) video in an m4v container played in Quicktime vs the exact same video remuxed to an mkv container and played in VLC.&nbsp; That tells me that VLC is accessing the same publicly-available APIs for hardware decoding of h.264 video that Quicktime is using.&nbsp; &nbsp; You need to determine if your videos use VC-1 or h.264 (AVC).&nbsp; Ignore any reference to x264… it's irrelevant.</blockquote>

[QUOTE="Lifeisabeach, post: 1234210, member: 38864"] Before my response here, I should mention that I used "x264" incorrectly, and it's frequently confused with h.264, myself included. I had to do some followup reading to clear my mind on this, and here's my understanding: x264 is an encoder, and h.264 (aka AVC) is a codec. As an alternative, x264 can also encode to VC-1, a competitor to h.264. Apple's public hardware-decoding API is for h.264 and does NOT support VC-1. That said… I have an i3 (mid-2010 iMac), but that's not really the point. Point is, I'm having identical results with an h.264 (AVC) video in an m4v container played in Quicktime vs the exact same video remuxed to an mkv container and played in VLC. That tells me that VLC is accessing the same publicly-available APIs for hardware decoding of h.264 video that Quicktime is using. You need to determine if your videos use VC-1 or h.264 (AVC). Ignore any reference to x264… it's irrelevant. [/QUOTE]

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