How to avoid file compression when making DVDs

[Xiaoang]

I am trying to burn a DVD from a video file with the following specifics:

PAL (25 fps)
MPEG files
24 bits, 720 x 576, 25 fps
Upper Field First
(DVD-PAL), 16:9

The file is 4.3 G, but when I create the DVD, it always compress it into about 1.6G file. The video running time is about 25 minutes.

Is there a way of burning a DVD without compress the file since this damages the video quality. I'm using Corel Pro X4.

[BrianCee]

When you are in the "Create disc" module down in the bottom left corner are a number of icons - click on the little gear wheel - then in the new dialogue box choose "Customise" and set whatever you want.

[Xiaoang]

Attached is a screen shot after I clicked the gear wheel. Can't see "Customise" option.

[BrianCee]

Sorry - missed a step - click on gear wheel - click on "Customise MPEG settings" - click on customise

will allow you to change settings

[Xiaoang]

Thanks for the reply.

I tried customise the mpeg setting and chose 100% for output. The size was still compressed.

[BrianCee]

Could you post your attachments as images - I do not want to keep downloading pdf files to see them.

[lata]

Hi

If you have a compliant DVD Mpeg2 file then that will burn to disc without further rendering. A video file of 25 minutes will be approximately 2 GB.

Can you give full details of your video file.
Place the video in the library or timeline, right click and choose propertiew, create an image of that window and attach to the post

You have to add the Mpeg2 video file to the burner module not the project timeline.
OK

1 / Start a new project – nothing in the timeline
2 / Share Create Disc DVD, choose the appropriate option for your file.(This opens the burner module)
3 / Top Left for Add Media – Add Video File, browse for your Mpeg2 file.
4 / Create your menu
5 / Options Cogwheel- Important, make sure Do Not Convert Compliant Mpeg files IS Selected. I notice your image shows as deselected.
6 / From the final window choose to create a Disc Image (for this test do not burn a disc), An iso file will be created of your movie, using VCL Player to play this ISO.
If the iSO plays ok then use the ISO burning tool to burn that file to disc.

7 / Note when you hit the Burn button the process should start with Create Menu.
If it starts with Create Title then your video file is being converted, not what you want.

Hi
As an aside
I noticed your video conversion properties DVD 1pdf, change the Variable option to use Constant

[Xiaoang]

Hi Lata,

Many thanks for your reply. I tried to create the iso file as you said. The quality of the picture is still quite visibly comproised.

[Xiaoang]

Hi Brian,

Here attached are the screen shots in pictures.

I am trying to create a DVD from a file about 9.1g in size, the film is 20 minutes long. Specifics of the video is:
Video
Codec: H264-MPEG-4AVC (pat 10) (avc1)
Resolution: 1920x1080
Frame Rate: 23.976000
Audio
Codec: PCM S16LE (twos)
Channels: Stereo
Sample Rate: 48000Hz
Bits per Sample: 16

As you can see, Corel only allow me options of resolution at 720x526. How can I choose output resolution at 1920x1080?

Thank you.

[canuck]

You can't have a standard DVD at a resolution of 1920x1080. The international standard is 720x576 for PAL and 720x480 for NTSC. Since you are going from HiDef video to standard, the video will always be compressed and you lose quality. There is no way around that unless you want to create a BluRay disc or AVCHD (hybrid) DVD.

[lata]

Hi Xiaoang

As canuck says the standard frame size for DVD is 720 x 576 or 480 Pal or NTSC.
There are other attributes that will cause you problems, the frame rate of 24.97 is also going to cause some issues in quality as it will be converted to 25fps or 29fps (Pal or Ntsc)
Can you tell us if you are using Pal or Ntsc.

Another problem maybe whether the video is progressive or not.
Can you view the properties again, do you see any reference to Upper Field First.
Right click a clip in the timeline and choose properties, post an image of that window.

OK
Maybe we can improve the quality……..

Before you burn a disc you should try converting the video to a compliant Mpeg2, this is suitable to burn a disc without further rendering.

With the project open in the timeline choose Share Create Video File – DVD -16:9
That is the standard template but may need adjusting to match your video file.

Please tell use the properties of your video file and whether you are Pal or Ntsc.
You may have to use Make Movie Templates Manager to create a new template?

Do you own a Bluray Player connected to your TV?

[Xiaoang]

Hi Lata,

I am using Pal in my system.

Do you have any recommended software to cover files to Mpeg2 or should I use Corel for that?

I am not sure what property details you need. I just right clicked the file in Windows and it reads as:
Type of file: MOV
Size: 9.10GB
Attributes: A

Other details are the same as my previous post.

I did try to create DVD as you previously suggested using .iso by Nero, it is slightly improved but since I watch films from a projector, the difference from the original file to the DVD is too obvious.

If I choose to make AVCHD, does that allow me to choose 1920x1080 resolution?

Many thanks.

Xiaoang

[Xiaoang]

Also,

Whenever I edit such high resolution files, Corel will automatically compress the image it a rather inferior quality, is there anyway to edit and save the edited video with the original quality?

[lata]

Hi

You provided an image of your save options in an earlier post, do the same for your Video Files.

With the video file in the timeline, right click and choose properties, what are they?

You mention Mov, most likely will be Frame Based (Progressive)

If your DVD uses Interlacing (Upper Field) then that may be the problem you are having, if the originals are frame Based.

Use Make Movie Templates Manager to create a New template using :-
You should use this template to burn a standard DVD.

MPEG files
24 bits, 720 x 576, 25 fps
Frame-based
(DVD-PAL), 16:9
Video data rate: 8000 kbps
Audio data rate: 256 kbps
Dolby Digital Audio, 48 KHz, 2/0(L,R)

If you wish to burn a AVCHD or Bluray then we do need to know the properties of your original video file. Otherwise Share Create Video File Avchd will convert your Mov to Mts suitable to burning a HD disc.
We asked earlier if you had a bluray Player connected to your pc, if not it is pointless creating a HD Disc.

[lata]

Also,

Whenever I edit such high resolution files, Corel will automatically compress the image it a rather inferior quality, is there anyway to edit and save the edited video with the original quality?

If Share Create Video File-Same as First Clip is available use that.

Otherwise use Make Movie Templates Manager to create a template similar to your original video files properties.

Your Mov file is not suitable to be burned to disc without converting it to a compliant video file.