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AVCHD Interlacing broken and drops half vertical resolution!
[Post New]
I just opened a 10 second 60i AVCHD clip and saved it in the same format and spec. (built-in profile for AVCHD 1080)
If SVRT is enabled the output is 60i
If SVRT is not enabled the output is 30p (HALF THE FIELDS AND RESOLUTION ARE DESTROYED)
The profile says "Top Field" mode when saving, so it should be interlaced output.
This can be verified by playing back both files in VLC player with deinterlacing disabled.

I know I have a similar thread to this in my slow motion topic, but this is unedited video.
Half of the pixel and time resolution is completely lost by just processing the video!

Sample files:
http://forum.cyberlink.com/forum/posts/downloadAttach/3122.page

This message was edited 2 times. Last update was at Dec 10. 2010 19:50

Robert2 S
Senior Contributor Location: Australia Joined: Apr 22, 2009 05:57 Messages: 1461 Offline
[Post New]
Sorry about your problem Bastian74, I may be wrong but isn't the only TV's that use interlaced are the old CRT(cathode ray tubes) and all the newer LCD and Plasma TV's and computer monitors use progressive?

I suppose what I am asking is why shoot in interlaced in the first place? Unless you specifically need to play the video on an old CRT television. My youtube channel====> http://www.youtube.com/user/relate2?feature=mhsn
[Post New]
Perhaps you don't realize the ramifications.
All 1920x1080 video imported at 60i will lose half of it's temporal and vertical resolution, forcing all output to 1920x540 30FPS effective lines of resolution - without doing any editing at all!
Even if you write to 720P which IS supported by HDTV and BluRay only every-other-field will be written to the 720P60 file.

Besides all those reason to be upset, and regardless if TVs dont show interlaced frames, I CHOSE INTERLACED OUTPUT and it outputed progressive delinterlaced frames. That is flat-out broken.

This message was edited 1 time. Last update was at Dec 10. 2010 17:41

[Post New]
This is a 2x magnification of unedited scene directly from my camera, both produced at the default AVCHD 1080 (top-field interlaced)

The "sharper" image is SVRT
The lower resolution image is SVRT disabled.
Notice that only vertical resolution is reduced.
This proves my point that all 60i AVCHD content is effectively halved in image and temporal resolution






This message was edited 1 time. Last update was at Dec 10. 2010 19:48

Dafydd B [Avatar]
Senior Contributor Joined: Aug 26, 2006 08:20 Messages: 11973 Offline
[Post New]
Please take your issue to Technical Support, they may be able to assist you.
https://membership.cyberlink.com/prog/support/cs/index.do
Thanks
Dafydd
[Post New]
Can someone else try this please:
Shoot some motion with 1080 30i/60i
10 Seconds is enough.
Now edit 1 second of the video in the middle, any edit that causes it to render.
Output the video in AVCHD with SVRT enabled.

Now open your produced video with VLC or some other program where you can turn OFF deinterlacing.
http://www.videolan.org/

Watch the video, notice how once SVRT is dissabled half the original fields are missing.

While SVRT is enabled:


After the title or transition / effect:



I just want to ensure the problem does not only affect my video.
If I am correct, all impoted interlaced video is reduced from 1920x1080i to effective 1920x540p (Every other line duplicated)

I've included my original input, project and output.
 Filename
PD9-Deinterlacing.zip
[Disk]
 Description
Video Samples
 Filesize
38928 Kbytes
 Downloaded:
256 time(s)
jmone
Senior Contributor Location: Australia Joined: Nov 26, 2010 00:05 Messages: 706 Offline
[Post New]
I can confirm that the rendered section (and I did my own output) looks terrible (lots of judder that to me it looks like the GOP, compression, fields or frame rates are wrong). Unfortunatly - while I'd love to see what tweaks to the rendering profiles can be made I will have no time till after Christmas.
PD 64 Bit-Win10 64 Bit-32GB RAM-80TB HDD
Sony FX6 - 500Mbps 4k/50p AVC-I HLG
Canon XF400 - 150Mbps 4k/50p AVC
GoPro Hero6 Black
Pana HS700-28Mbps 1080/50p AVC (High@L4.2)
Canon HV20-HDV 25Mbps 16:9 1440x1080/25p MPEG
[Post New]
So I sped up the output to 2x and the saved production was interlaced. To me this says the input is deinterlaced from 30i to 30p, then when producing the output it is interlaced again from 30p to 30i. Of course half the resolution was lost when converting from 30i to 30p.

By doubling the playback speed I'm effectively going from 30i to 30p, then speeding it up to 60p, then saving as 30i. The conversion from 60p to 30i simply interlaced the frames.

The fix would be for the import of 30i content to be deinterlaced into 60p via BOB or better deinterlacing. Of course this would double rendering times. Acutally rendering times would be "normal" because the rendering right now is (half what it should be) cheating by dropping half of all the "fields."

The only other option is to shoot at 60p.

------------------------ EDIT -----------------

Uhg, I just tried importing a 60p clip and saving it as 30i (default avchd) and it did not interlace that either. It converted it from 60p to 30p, then saved it as 30i (half the fields dropped again)

This message was edited 1 time. Last update was at Dec 20. 2010 01:06

Dafydd B [Avatar]
Senior Contributor Joined: Aug 26, 2006 08:20 Messages: 11973 Offline
[Post New]
Like I suggested previously - take your issue to Tech Support.

https://membership.cyberlink.com/prog/support/cs/index.do

where they may find your input invaluable or not.

Dafydd
[moderator]

This message was edited 2 times. Last update was at Dec 20. 2010 04:50

[Post New]
I have a support ticket open. After 1.5 weeks they asked what my exact version was. I was under the impression there was only one version of 9 released, asside from the patch that just came out. I was going to send them video samples but their support site only allows uploads of up to 1 megabyte. For a company that works mainly with video you would think their support site would allow you to upload a sample.

Since their support form leaves so much to be desired I am posting all the details I have in this thread, and then sending them the link here.

My main request in THIS thread is to verify that this is not specific to my Panasonic AVCHD files.
This is a simple thing to test, just compare rendered and non-rendered (raw camera) output in a player that is easy to control interlace settings. (Such as VLC)

I would think people would be more upset about losing half their resolution of imported interlaced video.

This message was edited 2 times. Last update was at Dec 20. 2010 10:35

Dafydd B [Avatar]
Senior Contributor Joined: Aug 26, 2006 08:20 Messages: 11973 Offline
[Post New]
I'll allow the thread to remain so online support can access the information for a while. I currently don't see any data I need refer or investigate too deeply which you haven't already mentioned to support.

Thread locked.

Take your issue to online technical support and await their response as previously suggested.

This forum is NOT technical support.

Dafydd

This message was edited 2 times. Last update was at Dec 20. 2010 11:24

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