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MediaPortal 1
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Codecs, External Players
Weird issue with x264 (720p+) and all media players but VLC
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<blockquote data-quote="malagem" data-source="post: 753263" data-attributes="member: 25170"><p>Hi folks,</p><p></p><p>What I'm posting here is *not*, strictly speaking, a specific MP-related issue - I don't think it is, since it happens also outside of MP. Since it's quite subtle in the facts but extremely annoying, I'm going to do my best to describe it as accurately as possible.</p><p></p><p><span style="font-size: 15px"><strong><u>First, the crime scene:</u></strong></span></p><p></p><p><strong>MediaPortal Version</strong>: 1.1.3.0</p><p><strong>MediaPortal Skin</strong>: Maya</p><p><strong>Windows Version</strong>: Windows 7 x64</p><p><strong>CPU Type</strong>: Intel i5-660 @ 3.3Ghz</p><p><strong>HDD</strong>: Corsair Performance SSD 128GB</p><p><strong>Memory</strong>: 8GB DDR3-10800</p><p><strong>Motherboard</strong>: Gigabyte GA-H55-UD2H</p><p><strong>Video Card</strong>: Core I5 Intel HD</p><p><strong>Video Card Driver</strong>: 15.22.1.64.2361</p><p><strong>Sound Card</strong>: Onboard</p><p><strong>Sound Card AC3</strong>: Optical out to Sony STR-DE545 A/V Receiver</p><p><strong>Sound Card Driver</strong>: </p><p><strong>MPEG2 Video Codec</strong>: MPC</p><p><strong>MPEG2 Audio Codec</strong>: MPC</p><p><strong>h.264 Video Codec</strong>: CoreAVC 2.55</p><p><strong>Satelite/CableTV Provider</strong>: none</p><p><strong>HTPC Case</strong>: Antec fusion remote</p><p><strong>Cooling</strong>: Scythe shuriken Rev B</p><p><strong>Power Supply</strong>: Zalman ultrasilent 500W</p><p><strong>Remote</strong>: Antec bundled iMON</p><p><strong>TV</strong>: Panasonic TH-58PZ850U</p><p><strong>TV - HTPC Connection</strong>: HDMI</p><p><strong>Data source</strong>: Synology DS-508 NAS w/ 5x2TB WD HDD through gigabit LAN network.</p><p></p><p><span style="font-size: 15px"><strong><u>Then, the facts:</u></strong></span></p><p></p><p>1) The issue only happens when playing back x264 or h.264 movies (.avi or .mkv doesn't matter)</p><p>2) The issue happens in mediaportal as well as in every player I've tried (WMP, MPC, GOM Player, KM player, ...) </p><p>3) The issue never happens in VLC</p><p>4) The issue happens regardless of the player using embedded codecs (eg. MPC, KMP) or not (eg. CoreAVC, FFDShow DXVA, ...)</p><p>5) The issue happens regardless of the kind of audio stream embedded in the container (MP3, AC3, DTS, ...)</p><p>6) Even when playing heavy 1080p/DTS files, CPU usage never rises above 35%</p><p>7) RAM is fine and was thoroughly tested with memtest86, SSD is fine and perfectly healty</p><p></p><p><span style="font-size: 15px"><strong><u>And, most important, the issue itself:</u></strong></span></p><p></p><p>When I play one of the above mentionned files (x264/h.264 .avi or .mkv), I get what I may call "micro-accelerations". The video plays correctly at the good frame rate for about 10-15 seconds, then during one second it speeds up at about 1.2, 1.3x its normal speed.</p><p></p><p>Then the cycle goes again: normal rate for 10-15 sec, then speedup for one second. And again. And again, until the file ends.</p><p></p><p>At the time the video micro-acceleration occurs, there is no change, in pitch or in speed, with the audio playback.</p><p></p><p>It looks like the playback engine has issues keeping the video synch'd with the audio, and then has to increase temporarely the video stream playback frame rate in order to catch up with the audio.</p><p></p><p>But... it does not happen with VLC. With this specific player, the playback is smooth and no issue ever happens.</p><p></p><p><span style="font-size: 15px"><strong><u>So...</u></strong></span></p><p></p><p>I'm getting kind of desperate with this issue. I'm seriously considering reinstalling the whole PC, which should not be a major hassle thanks to a ghost image, but it pisses me off to do so without understanding the root cause of the problem. SO I turn out to you wise experts in the hope that this might light some ideas in your brains, since mine doesn't even know where to search anymore...</p><p></p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="malagem, post: 753263, member: 25170"] Hi folks, What I'm posting here is *not*, strictly speaking, a specific MP-related issue - I don't think it is, since it happens also outside of MP. Since it's quite subtle in the facts but extremely annoying, I'm going to do my best to describe it as accurately as possible. [SIZE="4"][B][U]First, the crime scene:[/U][/B][/SIZE] [b]MediaPortal Version[/b]: 1.1.3.0 [b]MediaPortal Skin[/b]: Maya [b]Windows Version[/b]: Windows 7 x64 [b]CPU Type[/b]: Intel i5-660 @ 3.3Ghz [b]HDD[/b]: Corsair Performance SSD 128GB [b]Memory[/b]: 8GB DDR3-10800 [b]Motherboard[/b]: Gigabyte GA-H55-UD2H [b]Video Card[/b]: Core I5 Intel HD [b]Video Card Driver[/b]: 15.22.1.64.2361 [b]Sound Card[/b]: Onboard [b]Sound Card AC3[/b]: Optical out to Sony STR-DE545 A/V Receiver [b]Sound Card Driver[/b]: [b]MPEG2 Video Codec[/b]: MPC [b]MPEG2 Audio Codec[/b]: MPC [b]h.264 Video Codec[/b]: CoreAVC 2.55 [b]Satelite/CableTV Provider[/b]: none [b]HTPC Case[/b]: Antec fusion remote [b]Cooling[/b]: Scythe shuriken Rev B [b]Power Supply[/b]: Zalman ultrasilent 500W [b]Remote[/b]: Antec bundled iMON [b]TV[/b]: Panasonic TH-58PZ850U [b]TV - HTPC Connection[/b]: HDMI [b]Data source[/b]: Synology DS-508 NAS w/ 5x2TB WD HDD through gigabit LAN network. [SIZE="4"][B][U]Then, the facts:[/U][/B][/SIZE] 1) The issue only happens when playing back x264 or h.264 movies (.avi or .mkv doesn't matter) 2) The issue happens in mediaportal as well as in every player I've tried (WMP, MPC, GOM Player, KM player, ...) 3) The issue never happens in VLC 4) The issue happens regardless of the player using embedded codecs (eg. MPC, KMP) or not (eg. CoreAVC, FFDShow DXVA, ...) 5) The issue happens regardless of the kind of audio stream embedded in the container (MP3, AC3, DTS, ...) 6) Even when playing heavy 1080p/DTS files, CPU usage never rises above 35% 7) RAM is fine and was thoroughly tested with memtest86, SSD is fine and perfectly healty [SIZE="4"][B][U]And, most important, the issue itself:[/U][/B][/SIZE] When I play one of the above mentionned files (x264/h.264 .avi or .mkv), I get what I may call "micro-accelerations". The video plays correctly at the good frame rate for about 10-15 seconds, then during one second it speeds up at about 1.2, 1.3x its normal speed. Then the cycle goes again: normal rate for 10-15 sec, then speedup for one second. And again. And again, until the file ends. At the time the video micro-acceleration occurs, there is no change, in pitch or in speed, with the audio playback. It looks like the playback engine has issues keeping the video synch'd with the audio, and then has to increase temporarely the video stream playback frame rate in order to catch up with the audio. But... it does not happen with VLC. With this specific player, the playback is smooth and no issue ever happens. [SIZE="4"][B][u]So...[/u][/B][/SIZE] I'm getting kind of desperate with this issue. I'm seriously considering reinstalling the whole PC, which should not be a major hassle thanks to a ghost image, but it pisses me off to do so without understanding the root cause of the problem. SO I turn out to you wise experts in the hope that this might light some ideas in your brains, since mine doesn't even know where to search anymore... :thx: [/QUOTE]
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Weird issue with x264 (720p+) and all media players but VLC
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