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Interlacing and custom profiles
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Hi, my first post so here goes. Firstly, this forum has been a great source of help and got me this far without a request.

I'm using PD10 Ultra and have edited 16GB of AVCHD wedding footage into a 40 min movie comprising some 240 clips with titles and effect. Phew. Now for the production. Blu-ray tests look sweet but DVD tests are underwhelming with artifacting and jaggedness.

The JVC source .mts files are interlaced 1920x1080. However when producing for DVD (for those guests without Blu-ray) using MPEG-2 I'm only offered (HDV) MPEG-2, 720p.

Question: must I create a custom profile in order to retain interlacing or can I produce in 1080i via some other method?
I entered the Qualtiy Profile Setup panel and created a 1920x1080 setting with 'top line first' checked, but was rejected with: There are no customized profiles available. Select one from another profile group.

What am I missing, or is there an easier way to improve output quality?

Thanks in advance,
Ade
Dafydd B [Avatar]
Senior Contributor Joined: Aug 26, 2006 08:20 Messages: 11973 Offline
[Post New]
Hi Ade,
If I follow:
1. Edit Workspace > project in the tracks
2. Create Disc selected
3. 2D tab selected
4. DVD disc selected in Disc Format.
5. In Video & Audio settings
5-1. Widescreen(16:9)
5-2. Quality = HQ-best Quality or Smart Fit

These are the choices. I'm not sure which others you have selected.

I'm concerned about the artifacts you're getting.
1. make sure you have the latest patch installed - corrects some issues.
2. Your PC appears ok but a Diagnostic will help editors.
3. Shutting off hardware acceleration may help
4. Rendering your project (from HD to mpeg2), bringing it back into PD and then writing to disc may circumvent the quality issue.

The Produce section offers mpeg2/DVD compatible compression frame size etc and they are interlaced. If you select one and then the plus sign you can alter and create your own profile. If you do this you would need to:
1. Check your DVD player on your TV and others can read the file
2. have disc burning software to place the mpeg file onto a disc.

I should point out that many TV's have the ability to read from USB or SD card and delivery of HD footage is possible through these. The mp4 format (HD) can be placed onto a DVD disc and read by a PC - a useful way for you to deliver HD footage to family perhaps.

Editors may guide you with additional suggestions.

Dafydd

This message was edited 2 times. Last update was at Nov 22. 2011 12:46

[Post New]
Dafydd, thanks for your reply. Yes, your listed disc creation process is correct, plus I select Dobly.

Have PD build 1012 with auto updates, and attached a dxdiag. However I've only just disabled hardware accel, for no noticable benefit. Also I always produce to a folder then import it for burning.

Thanks for the profile tip. I was able to burn MPEG-2 using a 1920x1080 setting, but with little improvement. I will experiment with different profiles tomorrow. Would a lower format or higher bitrate been more suitable?

Another forum user commented about losing quality at the authoring and burn stage, suggesting that Nero or Power to Go were better options for this step. What do you think?

Ultimately I may need to utilise your closing options of USB or SD cards if the discs don't work out. Ideally t would be better if guests can view it on TV and enjoy the labelling. But packaging is irrelevant if the quality is distracting.

Fortunately I've got some time off so I'm keen to work this out. Thanks again.
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DxDiag.txt
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51 Kbytes
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343 time(s)
jmone
Senior Contributor Location: Australia Joined: Nov 26, 2010 00:05 Messages: 706 Offline
[Post New]
You don't mention what frame rates you are shooting in and if they are the same as the profile you are using for the DVD burn, it is best to keep them them same, eg 50i = PAL, 60i = NTSC. 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
All vodi
Senior Contributor Location: Canada Joined: Aug 21, 2009 11:24 Messages: 1431 Offline
[Post New]
Ade57,

Suggest you read our thread following. It does not answer your question directly but should give you a hint for the need to keep frame rates similar to avoid the jaggies you are experiencing.


http://forum.cyberlink.com/forum/posts/list/20103.page

This message was edited 1 time. Last update was at Nov 23. 2011 12:33

Win 10, i7
[Post New]
jmone, I maintained the frame rate of 25fps, though I could have sworn it was listed at 50 somewhere. I'm attaching a captured/produced comparison by MediaInfo. Maybe someone can spot something out of wack...

HDedit, jaggedness is minor, intermittent compared to strong artifacts in certain light. These are not uniform throughout, other sections have adequate definition given the exercise. 'Also, which thread are you suggesting I read..?

I did call a JVC techie at the start of this project who said basically the only way to retain full definition with AVCHD was to produce in Blu-ray. Still, I'm confident that an acceptable SD version of my HD footage can also be produced.

Not giving up!
[Thumb - MediaInfo-compare footage.jpg]
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MediaInfo-compare footage.jpg
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202 Kbytes
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282 time(s)
jmone
Senior Contributor Location: Australia Joined: Nov 26, 2010 00:05 Messages: 706 Offline
[Post New]
OK - I have a look at tyour Media Info stuff. Firstly while these clips are listed as 25fps, they are really 50i so I guess it is just how Media Info descrbes them. Your "captured" footage looks like bulk std AVC 1920x1080/50i. Your "Produced" footage will never play as it is a MPEG-2 1920x1080/50i which is not supported. When you produce a DVD you should (for the PAL option) get 720x576/50i. So PD9 really has two requirments, one is to transcode from AVC to MPEG2 and the second is to sacle from 1920x1080 to 720x576. You should see a loss in sharpness but the rest should be fine.

Can you please recreate the Produced clip with the following settings.
1) Using the Produce Tab for now, Select MPEG-2--> DVD HQ & PAL options.

Also if the option appears (I'm not sure of the rules in PD10 for it) can you create a second one using the HW Video Encoder:
2) Check "Fast Video Rendering Technology" --> & Hardware Video Encoder (this will use the GPU)

Please post Media Info of these two clips,
Do the both look the same or is one "Better"?
What GPU do you have? (eg nvidia 450 etc).

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]
jmone, when producing I didn't receive the HW encoder option with MPEG-2 DVD HQ using PAL. So I've attached MediaInfo on the normal render without SVRT.

As you indicated this clip looks much better than the custom render at 1080i. So it looks like I'll have to settle for the DVD HQ setting.

Unfortunately I don't have ready access to a decent sized TV for testing (a real problem when producing interlacced vids). Just wondering how this resolution would present on a big screen - should I expect to see significant degradation or not?

My GPU is a GeForce GTX 570 1280mb. Thanks for the input.

EDIT: after enabling HW encoding and OpenCL in preferences, SVRT wasn't available. Is this normal for MPEG-2 format ?
[Thumb - MPEG-2 DVD HQ.jpg]
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MPEG-2 DVD HQ.jpg
[Disk]
 Description
MediaInfo DVD HQ
 Filesize
130 Kbytes
 Downloaded:
262 time(s)

This message was edited 3 times. Last update was at Nov 25. 2011 10:37

jmone
Senior Contributor Location: Australia Joined: Nov 26, 2010 00:05 Messages: 706 Offline
[Post New]
The Media Info looks correct for DVD and this is as good as it will get (DVD just does not support anything "better").

SVRT will only work where the output format is the same as the input as it just copies the frames and then renders the bit that do change (eg Titles, transitions etc). While this keeps the bulk 100% identical it will not work for you creating a DVD from a HD source. I have also had seom issues with visible "glitches" around the transitions between SVRT and Rendering but this may be limited to my 1080/50p material. 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
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