Templot Club Archive 2007-2020
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posted: 10 Jun 2015 12:51 from: Stephen Freeman
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Hi, I've just done a Youtube video of an 0 Gauge 70ft Ransome & Rapier Turntable that I have recently built from a Metalsmiths kit. On the original video it runs smooth enough but when I view the Youtube version there appears to be some hesitation. Now this could be down to my Computer being fairly low spec by todays standards, the Broadband connection or some Youtube issue. Motorisation is from a geared 12v dc motor rated at 2 rpm. In this case control will be by DCC decoder, the rest of the layout will also be DCC controlled by NCE Power Procab 5amp system. To ensure the correct polarity of the turntable track a Tam Valley Dual Frog Juicer is used. Yes, I know the adjacent track is too close should be minimum of 9ft apart but t'was the only way to fit everything in, so I claim Modellers License. I'd like to know how it looks to others if possible. |
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posted: 10 Jun 2015 14:17 from: Matt M.
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It's fine. Tried it in HTML5 as well. The hand held camera is causing the only juddering that was evident. Matt M. |
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posted: 10 Jun 2015 14:22 from: John Shelley
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OK for me. Martin has said before that if you are having problems viewing a video that starts and stops then let it run through to the end and review. As it is now cached in your computer it should run smoothly. Cheers for now, John from 33820 St Ciers sur Gironde, France |
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posted: 10 Jun 2015 15:30 from: Martin Wynne
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Hi Stephen, Looking good.  I think most of the hesitation is camera shake, but I think I can see a few dropped frames. This is probably caused by not using the recommended 30 frames per second for YouTube when recording the video. The YouTube web site says: Frame Rate: 30 is preferred. 23.98, 24, 25, 29.97 are also acceptable. When viewed here on Templot Club at present videos are in Flash format. When viewed on the YouTube site it is probably in HTML5 format, depending on your device. You can see which format by right-clicking on the video. Depending on your system, you may find one or the other better image quality or smoother playing. regards, Martin. |
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posted: 10 Jun 2015 15:44 from: Martin Wynne
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Martin Wynne wrote:but I think I can see a few dropped frames. Yes. If you right-click on the video, you can then click on stats for nerds. You can then see among the data the number of dropped frames incrementing as each one is dropped. On my system I'm seeing 10 or 11 frames dropped in total while playing your video. Every time a frame is dropped (skipped) there is a slight hesitation in a video. If several are dropped together it becomes more noticeable. I see that your original was 640 x 360 video size, so I'm going to edit your post to display at that size. This should improve performance by not requiring any resampling. Martin. |
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posted: 10 Jun 2015 15:57 from: Martin Wynne
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Well strangely, at 640 x 360 performance was worse, so I have changed it back to 720 x 405.  Martin. |
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posted: 10 Jun 2015 16:04 from: Stephen Freeman
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Hi, Yes I am seeing about 15 dropped frames. The Frame rate spec for the camera is 30, so that can't be it. I''m having a tinker in Youtube, will report back shortly. No improvement. |
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| Last edited on 10 Jun 2015 16:10 by Stephen Freeman |
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posted: 10 Jun 2015 16:17 from: Stephen Freeman
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Hi, The original was shot at 1280 x 720 HD (AVI), bit rate 1411 kbps, data rate 28676 kbps frame rate 30fps. Any changes were made by Youtube. |
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posted: 10 Jun 2015 16:24 from: Martin Wynne
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Borg-Rail wrote: Any changes were made by Youtube.YouTube changes most stuff to a lower quality. That's why I don't use it for the Templot videos. Try uploading the AVI file directly to your web site and posting a link here. We should then be able to play it at original quality in Windows Media Player. Martin. |
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posted: 10 Jun 2015 18:25 from: Stephen Freeman
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Unfortunately not quite that simple.I'm working on it. | ||
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