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Unwanted prism effect on video playback

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Unwanted prism effect on video playback Empty Unwanted prism effect on video playback

Post by Neilc on Fri Nov 13, 2020 12:24 pm

Hi

I have 4 short videos all shot at the same time (2006) the thumbnail image and playback displays with a 'prism' effect all the way through. I have played back with WMP, and MPC-HC, both players playback with the prism effect. I have a W10 Build 18363, 64 bit laptop, with 8GB RAM. K-Lite codec pack v15.8.9 (Full). Other videos play back in both players without any issues.

Any ideas how I might fix the problem?

Neilc

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Post by Admin on Fri Nov 13, 2020 3:21 pm

I don't know. Can you upload one of those videos?
http://www.sendpace.com

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Post by Neilc on Fri Nov 13, 2020 3:31 pm

Admin wrote:I don't know. Can you upload one of those videos?
http://www.sendpace.com

I clicked your link to "sendpace" and it doesn't work.

I can trim the video and send a few seconds of it, let me know where to, I could share it with you via onedrive...

Or even a screen shot of the thumbnail would be sufficient for you to see what I mean.

Let me know.

Thanks

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Post by Admin on Fri Nov 13, 2020 6:49 pm

Sorry I made typo, it is sendspace.com/ but you can use any other host as well.

I need to see the file itself to give a clear answer about why it plays that way.

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Post by Admin on Fri Nov 13, 2020 6:50 pm

Right-click on the file in Explorer and select MediaInfo. Copy that text here, maybe I can see something in there before you upload.

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Post by Neilc on Fri Nov 13, 2020 7:04 pm

General
Complete name : C:\Users\neilc\Desktop\Left To Sort\Rachaels school play Dec 2003 & Xmas play\Rachael Xmas Pt 2.mov
Format : QuickTime
Format/Info : Original Apple specifications
Commercial name : DVCAM
File size : 1.21 GiB
Duration : 5 min 43 s
Overall bit rate mode : Constant
Overall bit rate : 30.3 Mb/s
Recorded date : 2001-12-19 15:23:31.000
Encoded date : UTC 2006-02-21 22:21:30
Tagged date : UTC 2006-02-21 22:31:13
Writing library : Apple QuickTime

Video
ID : 1
Format : DV
Commercial name : DVCAM
Codec ID : dvcp
Duration : 5 min 43 s
Bit rate mode : Constant
Bit rate : 24.4 Mb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Bottom Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 2.355
Time code of first frame : 00:41:35;04
Time code source : Subcode time code
Stream size : 1 000 MiB (80%)
Language : English
Encoded date : UTC 2006-02-21 22:21:30
Tagged date : UTC 2006-02-21 22:31:13

Audio #1
ID : 2
Format : PCM
Format settings : Big / Signed
Codec ID : twos
Duration : 5 min 43 s
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Stream size : 62.9 MiB (5%)
Language : English
Encoded date : UTC 2006-02-21 22:21:30
Tagged date : UTC 2006-02-21 22:31:13

Audio #2
ID : 1-0
Format : PCM
Format settings : Big / Signed
Muxing mode : DV
Muxing mode, more info : Muxed in Video #1
Duration : 5 min 43 s
Bit rate mode : Constant
Bit rate : 768 kb/s
Channel(s) : 2 channels
Sampling rate : 32.0 kHz
Bit depth : 12 bits
Stream size : 31.5 MiB (3%)

Audio #3
ID : 1-1
Format : PCM
Format settings : Big / Signed
Muxing mode : DV
Muxing mode, more info : Muxed in Video #1
Duration : 5 min 43 s
Bit rate mode : Constant
Bit rate : 768 kb/s
Channel(s) : 2 channels
Sampling rate : 32.0 kHz
Bit depth : 12 bits
Stream size : 31.5 MiB (3%)

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Post by Admin on Fri Nov 13, 2020 10:32 pm

Nothing obvious in the file properties. The video is interlaced, so you could try enabling Yadif software deinterlacing in LAV Video Decoder settings. Probably won't make a difference, but never hurts to test. Normally deinterlacing is done automatically in the video renderer.

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Post by Neilc on Fri Nov 13, 2020 10:51 pm

Admin wrote:Nothing obvious in the file properties. The video is interlaced, so you could try enabling Yadif software deinterlacing in LAV Video Decoder settings. Probably won't make a difference, but never hurts to test. Normally deinterlacing is done automatically in the video renderer.

I tried as you suggested but no change. Next step? Upload the screen shot to you?

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Post by Admin on Fri Nov 13, 2020 11:36 pm

Yes, upload screenshot.

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Post by Admin on Sat Nov 14, 2020 11:12 am

The file has decoding errors. It may be a bug in the decoder. It is not something I can fix for you right now. I would need to submit a sample file to the decoder developers. Another possibility is that the files are damaged.

I suggest trying if it plays properly with Quicktime.

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Post by Neilc on Sat Nov 14, 2020 11:41 am

Admin wrote:The file has decoding errors. It may be a bug in the decoder. It is not something I can fix for you right now. I would need to submit a sample file to the decoder developers. Another possibility is that the files are damaged.

I suggest trying if it plays properly with Quicktime.

Thanks for the suggestion but I have W10 on a PC and from what I can see Quicktime is no longer supported on that platform?

I could submit the smaller of the video files if you think it is worth trying? (312MB)

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Post by Admin on Sat Nov 14, 2020 12:28 pm

Yes, you can upload sample video.

You should be able to install Quicktime if you right-click on its installer, go to Properties, Compatibility, select Windows 7.

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Post by Neilc on Sat Nov 14, 2020 7:56 pm

I installed Quicktime and opened the video file and it played correctly, no prism effect. Am I missing a codec for use with WMP, VLC, and W10 Films & TV. Thanks very much Smile

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Post by Admin on Sun Nov 15, 2020 2:13 pm

No, you are not missing a codec. The decoder that is used by MPC/WMP/VLC is an open source decoder from FFmpeg project. It has a bug when decoding your videos. In case of VLC you can not change the decoder. In case of MPC/WMP, thsse might work with a codec from software that was bundled with the Camcorder. I don't know any other free alternatives. In case of Movies&TV there is no codec available at all for this format.

Probably best solution is to use Quicktime.

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Post by Neilc on Sun Nov 15, 2020 2:50 pm

Ok. Many thanks for your help. Smile

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