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MediaPortal 1
MediaPortal 1 Talk
Automatic Refreshrate Changer
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<blockquote data-quote="HomeY" data-source="post: 1079886" data-attributes="member: 68365"><p>That's 1 of the 3 available 'scanning methods': Interlaced, Progressive or <a href="http://en.wikipedia.org/wiki/Progressive_segmented_frame" target="_blank">Progressive Segmented Frame</a> </p><p></p><p>The hauppage encoding options explain the frame rate, since i'm pretty sure you'll get interlaced video if you disable the encoding.</p><p></p><p></p><p>I'm not saying that, but i'm trying to explain what the standards are and how the settings should be applied (and that's based on my current knowledge about this stuff). Any setting a TV can do is not taking into account here, because every TV can have different settings or approaches.</p><p>29.97i means the video plays 29.97 frame per second, interlaced. Interlaced tells us that each frame consists of 2 fields, which means that the best refresh rate (for stutter free playback) would be 29.97 x2 so 59.94Hz (you can read that also in my quote about NTSC from Wikipedia a few posts up).</p><p>Now the 29.97p you have created: The difference between the Interlaced & Progressive frame is that in the Progressive frame, you also have 2 fields, but both fields contain the SAME scanlines.</p><p></p><p>Take a look @ the following 2 pictures, which hopefully explain it a bit further, since it's very complex stuff.</p><p>[ATTACH]150085[/ATTACH] Here you see the Interlaced video (typical US standard). The Even & Odd fields contain different scanlines</p><p>[ATTACH]150086[/ATTACH] Here you have an example of 29.97p. As you can see (the colors) here the Even & Odd fields contain the same scanlines, but still, there are 2 fields in every frame. So for proper playback, you actually need to treat this 29.97p file as Interlaced video, and play it @ 59.94Hz (for stutter free playback), hence the 59 setting in the refresh rate changer. Playing back this 29.97p file @ 29Hz, means only half of the fields are being displayed on your TV.</p></blockquote><p></p>
[QUOTE="HomeY, post: 1079886, member: 68365"] That's 1 of the 3 available 'scanning methods': Interlaced, Progressive or [URL='http://en.wikipedia.org/wiki/Progressive_segmented_frame']Progressive Segmented Frame[/URL] The hauppage encoding options explain the frame rate, since i'm pretty sure you'll get interlaced video if you disable the encoding. I'm not saying that, but i'm trying to explain what the standards are and how the settings should be applied (and that's based on my current knowledge about this stuff). Any setting a TV can do is not taking into account here, because every TV can have different settings or approaches. 29.97i means the video plays 29.97 frame per second, interlaced. Interlaced tells us that each frame consists of 2 fields, which means that the best refresh rate (for stutter free playback) would be 29.97 x2 so 59.94Hz (you can read that also in my quote about NTSC from Wikipedia a few posts up). Now the 29.97p you have created: The difference between the Interlaced & Progressive frame is that in the Progressive frame, you also have 2 fields, but both fields contain the SAME scanlines. Take a look @ the following 2 pictures, which hopefully explain it a bit further, since it's very complex stuff. [ATTACH]150085[/ATTACH] Here you see the Interlaced video (typical US standard). The Even & Odd fields contain different scanlines [ATTACH]150086[/ATTACH] Here you have an example of 29.97p. As you can see (the colors) here the Even & Odd fields contain the same scanlines, but still, there are 2 fields in every frame. So for proper playback, you actually need to treat this 29.97p file as Interlaced video, and play it @ 59.94Hz (for stutter free playback), hence the 59 setting in the refresh rate changer. Playing back this 29.97p file @ 29Hz, means only half of the fields are being displayed on your TV. [/QUOTE]
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