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Guide: Perfect playback & Display calibration
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<blockquote data-quote="kiwijunglist" data-source="post: 1001639" data-attributes="member: 76888"><p><span style="font-size: 22px">Video Playback - Matching source fps to display hz</span></p><p></p><p><span style="font-size: 15px">Introduction</span></p><p></p><p>[spoiler]A movie is just a collection of static images played one after each other really quickly.</p><p>The speed at which the images in a movie change are called video frame rate or video frames per second (fps).</p><p>The speed at which the images on the monitor/tv change is called the display refresh rate (hz)</p><p></p><p>Generally computer monitors use 59/60hz</p><p>PAL TVs use ~50hz / NTSC TVs use ~60hz</p><p>Video can be pretty much anything (23.976fps , 24 fps, 25fps, 29.97fps, 30fps, 48fps, 50fps, 60fps)</p><p>Most modern TVs can do ~24hz ~50hz and ~60hz ; some TVs might manage 23.976hz</p><p></p><p>We are going to do two things to make playback buttery smooth</p><p>1. We will make the frequency at which the display updates as close as possible to the frequency at which the video updates. We do this using dynamic refresh rate in mediaportal.</p><p>2. We will speed up or slow down the video very slightly so that the video fps is exactly the same as the display hz. We do this using mediaportal audio renderer.[/spoiler]<span style="font-size: 15px">Check what frequency your display can handle</span></p><p></p><p>Open your video card/display settings in windows and try out the following refresh rates 23.976hz,24hz,50hz,60hz (if available)</p><p>eg. Full HD 1080p: 1920x1080x23.976hz, 1920x1080x24hz, 1920x1080x50hz ,1920x1080x60hz</p><p></p><p>AMD:</p><p>[ATTACH]130346[/ATTACH]</p><p></p><p>Nvidia:</p><p>[ATTACH]130443[/ATTACH]</p><p></p><p>Intel:</p><p>[ATTACH]130441[/ATTACH]</p><p></p><p>You may find that you have to readjust the overscan every time the refresh rate changes. However after you click apply next time you try that resolution+hz it will remember that you want overscan set to 0%.</p><p></p><p>If your TV jumps out of 0% overscan mode, then you may find that you have to use a different HDMI port on the tv. This happens with my Samsung TV if I label HDMI2 as "PC". Some TVs may always jump out of picture/view mode whenever the refresh rate changes, if you have this problem contact the manufacturer.</p><p></p><p>After we know what the TV can handle we can enable dynamic refresh rate in mediaportal</p><p></p><p><span style="font-size: 15px">Enabling Dynamic Refresh Rate (DRR)</span></p><p></p><p>[ATTACH=full]130347[/ATTACH]</p><p></p><p>[ATTACH=full]130578[/ATTACH]</p><p></p><p>If you have problems changing the internal refresh rate you can try enabling force change and device reset.</p><p><a href="https://forum.team-mediaportal.com/threads/guide-perfect-playback-display-calibration.119610/page-2#post-1001755" target="_blank">If the internal refresh rate changer doesn't work then see here for using an external utlity.</a></p><p></p><p>Sometimes you will be able to get refresh rates you couldn't get in video card settings.</p><p>You can try to a different refresh rate not supported by video card settings, eg. 23.976hz</p><p>What will happen is:</p><p>1. Your TV will switch to 23.976hz</p><p>2. Your TV will switch to the closest compatible refresh rate, eg. 24hz</p><p>3. Your display goes black and you have to reboot PC + turn on + off TV</p><p>4. You break your TV - never heard of this happening, if don't want to risk then only use what was available earlier.</p><p></p><p><span style="font-size: 15px">Testing dynamic refresh rate (DRR)</span></p><p></p><p>Load Several Videos in mediaportal with different fps rates and check nothing wierd happens when your display changes refresh rate. If there are problems you should search the forums for advice. The solutions involve ticking the device reset box or force refresh rate change, or using an external utility outside of MP to change the refresh rate.</p><p></p><p>If you press Shift+1 in mediaportal it will tell you the current refresh rate of the display and fps of the movie</p><p></p><p>[ATTACH=full]130810[/ATTACH]</p><p></p><p><span style="font-size: 15px">Setting up MediaPortal audio renderer (MPAR)</span></p><p></p><p>The most important things are:</p><ol> <li data-xf-list-type="ol">LAV = audio decoder and MPAR = audio renderer</li> <li data-xf-list-type="ol">LAV Audio filter has bitstreaming/pass-through disabled. If the audio is decoded rather than passed directly then MPAR can change the audio playback speed to match the display's refresh rate.</li> <li data-xf-list-type="ol">LAV Audio filter has A/V sync correction disabled (because we correct for A/V sync in MPAR)</li> <li data-xf-list-type="ol">MPAR filter has vsync adjustment + timestretch enabled.</li> <li data-xf-list-type="ol">LAV Output format, keep all boxes are ticked unless you receiver doesn't support one of them.</li> </ol><p>The other settings you can experiment with or leave them with what I have suggested. I think it's best to disable mixing unless you only have stereo speakers, in which case it is mandatory to downmix so that you can still hear the dialog audio from the center channel. DRC means that LAV will boost the audio volume in quiet scenes, it's only useful if you watch tv at night with the audio down low. Convert output to standard channel layouts (Mono, Stereo, 5.1, 6.1, 7.1) fills non-existent channels with silence (required by some HDMI receivers). Convert 6.1 to 7.1 means the back center channel gets doubled into both back channels. The LFE mix levels only effect down mixing into stereo.</p><p></p><p>[ATTACH=full]130349[/ATTACH]</p><p></p><p>LAV Audio Settings:</p><p></p><p>[ATTACH=full]133680[/ATTACH]</p><p></p><p>[ATTACH=full]133681[/ATTACH]</p><p></p><p>If you want to decode DTS-HD audio then you need to install Arcsoft TMT5 trial version then copy dtsdecoderdll.dll from the arcsoft directory and paste it into the LAV x86 directory next to lavaudio.ax</p><p></p><p>[ATTACH=full]131462[/ATTACH]</p><p></p><p>MPAR Settings:</p><p></p><p>[ATTACH=full]133682[/ATTACH]</p><p></p><p>It's probably best to leave sample rate and bitrate on auto to prevent un-necessary resampling. You should right click on the volume icon in the system tray, and click play back devices. Ensure that your device has all the supported birates/sample rates enabled, windows will let you test each one. If you hear crackles, hisses or pops then disable that sample rate/bitrate. SRC_Sync_Best is the best audio resampler (but if your audio devices supports all sample rates, then no re-sampling will be done if set to auto mode). If AC3 mode is set to auto then MPAR will encode audio into AC3 when the # audio channels matches the # speakers (defined in MPAR settings). Exclusive mode should be enabled to prevent windows interfering with the channel layout and sample/bit rates.</p><p></p><p><strong><em>EDIT: If you use HDMI then AC3 should be disabled</em></strong></p><p></p><p><span style="font-size: 15px">In this screenshot we can see MPAR and DRR are working perfectly</span></p><p></p><p>[ATTACH=full]130357[/ATTACH]</p></blockquote><p></p>
[QUOTE="kiwijunglist, post: 1001639, member: 76888"] [SIZE=6]Video Playback - Matching source fps to display hz[/SIZE] [SIZE=4]Introduction[/SIZE] [spoiler]A movie is just a collection of static images played one after each other really quickly. The speed at which the images in a movie change are called video frame rate or video frames per second (fps). The speed at which the images on the monitor/tv change is called the display refresh rate (hz) Generally computer monitors use 59/60hz PAL TVs use ~50hz / NTSC TVs use ~60hz Video can be pretty much anything (23.976fps , 24 fps, 25fps, 29.97fps, 30fps, 48fps, 50fps, 60fps) Most modern TVs can do ~24hz ~50hz and ~60hz ; some TVs might manage 23.976hz We are going to do two things to make playback buttery smooth 1. We will make the frequency at which the display updates as close as possible to the frequency at which the video updates. We do this using dynamic refresh rate in mediaportal. 2. We will speed up or slow down the video very slightly so that the video fps is exactly the same as the display hz. We do this using mediaportal audio renderer.[/spoiler][SIZE=4]Check what frequency your display can handle[/SIZE] Open your video card/display settings in windows and try out the following refresh rates 23.976hz,24hz,50hz,60hz (if available) eg. Full HD 1080p: 1920x1080x23.976hz, 1920x1080x24hz, 1920x1080x50hz ,1920x1080x60hz AMD: [ATTACH]130346[/ATTACH] Nvidia: [ATTACH]130443[/ATTACH] Intel: [ATTACH]130441[/ATTACH] You may find that you have to readjust the overscan every time the refresh rate changes. However after you click apply next time you try that resolution+hz it will remember that you want overscan set to 0%. If your TV jumps out of 0% overscan mode, then you may find that you have to use a different HDMI port on the tv. This happens with my Samsung TV if I label HDMI2 as "PC". Some TVs may always jump out of picture/view mode whenever the refresh rate changes, if you have this problem contact the manufacturer. After we know what the TV can handle we can enable dynamic refresh rate in mediaportal [SIZE=4]Enabling Dynamic Refresh Rate (DRR)[/SIZE] [ATTACH=full]130347[/ATTACH] [ATTACH=full]130578[/ATTACH] If you have problems changing the internal refresh rate you can try enabling force change and device reset. [URL='https://forum.team-mediaportal.com/threads/guide-perfect-playback-display-calibration.119610/page-2#post-1001755']If the internal refresh rate changer doesn't work then see here for using an external utlity.[/URL] Sometimes you will be able to get refresh rates you couldn't get in video card settings. You can try to a different refresh rate not supported by video card settings, eg. 23.976hz What will happen is: 1. Your TV will switch to 23.976hz 2. Your TV will switch to the closest compatible refresh rate, eg. 24hz 3. Your display goes black and you have to reboot PC + turn on + off TV 4. You break your TV - never heard of this happening, if don't want to risk then only use what was available earlier. [SIZE=4]Testing dynamic refresh rate (DRR)[/SIZE] Load Several Videos in mediaportal with different fps rates and check nothing wierd happens when your display changes refresh rate. If there are problems you should search the forums for advice. The solutions involve ticking the device reset box or force refresh rate change, or using an external utility outside of MP to change the refresh rate. If you press Shift+1 in mediaportal it will tell you the current refresh rate of the display and fps of the movie [ATTACH=full]130810[/ATTACH] [SIZE=4]Setting up MediaPortal audio renderer (MPAR)[/SIZE] The most important things are: [LIST=1] [*]LAV = audio decoder and MPAR = audio renderer [*]LAV Audio filter has bitstreaming/pass-through disabled. If the audio is decoded rather than passed directly then MPAR can change the audio playback speed to match the display's refresh rate. [*]LAV Audio filter has A/V sync correction disabled (because we correct for A/V sync in MPAR) [*]MPAR filter has vsync adjustment + timestretch enabled. [*]LAV Output format, keep all boxes are ticked unless you receiver doesn't support one of them. [/LIST] The other settings you can experiment with or leave them with what I have suggested. I think it's best to disable mixing unless you only have stereo speakers, in which case it is mandatory to downmix so that you can still hear the dialog audio from the center channel. DRC means that LAV will boost the audio volume in quiet scenes, it's only useful if you watch tv at night with the audio down low. Convert output to standard channel layouts (Mono, Stereo, 5.1, 6.1, 7.1) fills non-existent channels with silence (required by some HDMI receivers). Convert 6.1 to 7.1 means the back center channel gets doubled into both back channels. The LFE mix levels only effect down mixing into stereo. [ATTACH=full]130349[/ATTACH] LAV Audio Settings: [ATTACH=full]133680[/ATTACH] [ATTACH=full]133681[/ATTACH] If you want to decode DTS-HD audio then you need to install Arcsoft TMT5 trial version then copy dtsdecoderdll.dll from the arcsoft directory and paste it into the LAV x86 directory next to lavaudio.ax [ATTACH=full]131462[/ATTACH] MPAR Settings: [ATTACH=full]133682[/ATTACH] It's probably best to leave sample rate and bitrate on auto to prevent un-necessary resampling. You should right click on the volume icon in the system tray, and click play back devices. Ensure that your device has all the supported birates/sample rates enabled, windows will let you test each one. If you hear crackles, hisses or pops then disable that sample rate/bitrate. SRC_Sync_Best is the best audio resampler (but if your audio devices supports all sample rates, then no re-sampling will be done if set to auto mode). If AC3 mode is set to auto then MPAR will encode audio into AC3 when the # audio channels matches the # speakers (defined in MPAR settings). Exclusive mode should be enabled to prevent windows interfering with the channel layout and sample/bit rates. [B][I]EDIT: If you use HDMI then AC3 should be disabled[/I][/B] [SIZE=4]In this screenshot we can see MPAR and DRR are working perfectly[/SIZE] [ATTACH=full]130357[/ATTACH] [/QUOTE]
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