Reply to thread

Message

<blockquote data-quote="edterbak" data-source="post: 604814" data-attributes="member: 69192">Ofcourse I could be totally wrong about this, but this is my guess.My bet is some 1080p files are out of BD-spec. BluRay specification for 1920x1080 material contains maximum of 4 reference frames. If you have movies with more than 4RF (@1920x1080), it will stutter or not play. It is a limitation of the ATI card. It is easilly capable of decoding more than 4 ref frames with DXVA, but ATI has choosen (for now) it is not supporting it. It has to do with the various different UVD engines. Probably the reason why it is working in VLC is it recognises the problem and switches to software decoding. Do you see a high(er) cpu load when playing it in VLC?If you want to know more about this, you could see:<a href="http://forums.amd.com/game/messageview.cfm?catid=279&amp;threadid=106911&amp;STARTPAGE=1&amp;FTVAR_FORUMVIEWTMP=Linear" target="_blank">AMD Game Forums - DXVA Limitations on ATI 3450</a><a href="http://zachsaw.blogspot.com/2009/06/ati-hd-hardware-accelerated-dxva-for.html" target="_blank">ATI HD Hardware Accelerated DXVA for H.264 AVC L5.0 / L5.1 - Zach Saw's Blog</a><a href="http://cinch83.blog.de/2010/02/10/ati-uvd-vs-nvidia-purevideo-hd-7982522/" target="_blank">ATi UVD vs. nVIDIA VP - CiNcH's DVB &amp; HTPC Blog</a></blockquote>

[QUOTE="edterbak, post: 604814, member: 69192"] Ofcourse I could be totally wrong about this, but this is my guess. My bet is some 1080p files are out of BD-spec. BluRay specification for 1920x1080 material contains maximum of 4 reference frames. If you have movies with more than 4RF (@1920x1080), it will stutter or not play. It is a limitation of the ATI card. It is easilly capable of decoding more than 4 ref frames with DXVA, but ATI has choosen (for now) it is not supporting it. It has to do with the various different UVD engines. Probably the reason why it is working in VLC is it recognises the problem and switches to software decoding. Do you see a high(er) cpu load when playing it in VLC? If you want to know more about this, you could see: [url=http://forums.amd.com/game/messageview.cfm?catid=279&threadid=106911&STARTPAGE=1&FTVAR_FORUMVIEWTMP=Linear]AMD Game Forums - DXVA Limitations on ATI 3450[/url] [url=http://zachsaw.blogspot.com/2009/06/ati-hd-hardware-accelerated-dxva-for.html]ATI HD Hardware Accelerated DXVA for H.264 AVC L5.0 / L5.1 - Zach Saw's Blog[/url] [url=http://cinch83.blog.de/2010/02/10/ati-uvd-vs-nvidia-purevideo-hd-7982522/]ATi UVD vs. nVIDIA VP - CiNcH's DVB & HTPC Blog[/url] [/QUOTE]

Verification