Why is Ulead DMF4 re-encoding already DVD compliant files ?

GeorgeW · Post by **GeorgeW** » Sat Feb 25, 2006 8:20 pm

tyamada:

Did you make sure to have the "do not convert compliant mpeg files" checked, and did you have the "treat mpeg audio as non compliant" checked?

What indicator are you using to determine that it re-rendered your video

If it shows messages of muxing and converting menus, that doesn't mean it is re-rendering the source video.

p.s. please feel free to start a new thread for using compliant mpeg files in MF4. I"m afraid this is taking away from the original poster's question.

Regards,
George

GeorgeW · Post by **GeorgeW** » Sat Feb 25, 2006 8:24 pm

fanirama:

At 2.5 minutes, it doesn't sound like the video was re-encoded. Is it possible your audio is being re-encoded

Can you post a small sample clip of your Womble created video/audio -- perhaps the audio has a problem, so MF4 is re-encoding the audio. Is Womble creating Dolby Digital, or MP3 audio

and is the Womble audio 48khz, or some other sampling rate

Regards,
George

fanirama · Post by **fanirama** » Sat Feb 25, 2006 8:26 pm

Also, I checked the media clip properties of the resulting DVD vob files and it says

TV System: 525/60 NTSC. Is this correct ? ( whats this - 525 frames at 60 secs ? )

Also, the VOB video length is only 40'33 secs instead of 42'58 secs. It looks like Ulead chopped some video off. This may be causing the audio/video sync issue and explain why the final vob is only 814MB when source is 887MB. The out of sync is right from the beginning btw.

It said for audio - Dolby Digital 1 channel.
Source audio is 48KHz. Final audio is also at 48KHz

one more thing -- the video bitrate is shown as VBR Max 4400 Kbps.
But the source has VBR max 15000 Kbps. Why did it go down ?

GeorgeW · Post by **GeorgeW** » Sat Feb 25, 2006 8:36 pm

are you saying the source video from Womble has a video bitrate of 15000kbps

if so, that is outside of dvd specs, and would be considered non compliant.

Regards,
George

fanirama · Post by **fanirama** » Sat Feb 25, 2006 9:01 pm

GeorgeW wrote:are you saying the source video from Womble has a video bitrate of 15000kbps

if so, that is outside of dvd specs, and would be considered non compliant.

Regards,
George

Well, I double checked.
CapDVHS has a column that shows the bit rate and there its showing 15Mbps. Womble is saying its only 7500 Kbps. I thought as per spec the max was 9800Kbps. Perhaps CapDVHS is not reading it correctly.

And Ulead DMF4 says its VBR with max of 4400Kbps. Anyways, I unchecked the "treat mpeg file as dvd compliant" and "audio as noncompliant" and reburnt the DVD folder.
It still has the audio/video sync issues. I tried changing the mpeg settings to 720x480 and some combinations of checked/unchecked etc.
Each time it takes approx 3 mins to author the dvd folder but it always has audio/video sync issues. Each time I deleted the temp files created

The source looks good.

Too bad. I'm at my wits end to correct this and its a shame. I really liked Ulead DMF4.
Its only working correctly for 720x480 videos and Comcast is no longer transmitting in that format. Its now transmitting at 704x480 which is still DVD compliant but Ulead is not working with it.

GeorgeW · Post by **GeorgeW** » Sat Feb 25, 2006 10:50 pm

try this:

From Womble, output your video the way you have been, but output mpeg audio at the highest bitrate available.

Then in MF4, use the following settings:

"Do not convert compliant mpeg audio" (check)
"Treat mpeg audio as non dvd compliant" (check)

And in your DMF4 project settings, use Dolby Digital audio at 224kbps.

Regards,
George

p.s. is your cable broadcasting 29.97fps, or 23.976 fps

maddrummer3301 · Post by **maddrummer3301** » Sun Feb 26, 2006 4:41 pm

Hi,
Ulead works with 704 framesize no problem.

DO NOT change the framesize of the video from the original source videos framesize unless your doing something very custom like
creating a video to send via email (and reduce the size).

>>Also, I checked the media clip properties of the resulting DVD vob files and it says TV System: 525/60 NTSC. Is this correct ? ( whats this - 525 frames at 60 secs ? )

>>Too bad. I'm at my wits end to correct this and its a shame. I really liked Ulead DMF4.

Please do not take any offense to this but you really need to learn more about video and mpeg2 files before judging any software.
You posted the above statement. Too bad etc.

Mpeg files are very complex files and weren't designed to be edited. They are a final stage video files and highly compressed.
One needs to understand this before working with these files.

To give you an example a 2 hour movie on a dvd would equal about
26 GIGS of compressed DV material. That is the size of the video when the people work on the video before it's compressed to mpeg. They do all their editing in this DV or similar format.
Even the DV video material is a compressed format. Then that's compressed even more to the Mpeg2 standard.

So remember your working with highly compressed "Fragile" video.
Once your audio is out of sync your working with a corrupted mpg file. Everything from there is "DownHill".
I would stay away from VOB's and import the dvd correctly which extracts the mpeg2 video from the VOB container properly.

Good luck,

MD

fanirama · Post by **fanirama** » Mon Feb 27, 2006 1:20 am

GeorgeW wrote:try this:

From Womble, output your video the way you have been, but output mpeg audio at the highest bitrate available.

Then in MF4, use the following settings:

"Do not convert compliant mpeg audio" (check)
"Treat mpeg audio as non dvd compliant" (check)

And in your DMF4 project settings, use Dolby Digital audio at 224kbps.

Regards,
George

p.s. is your cable broadcasting 29.97fps, or 23.976 fps

Comcast Cable is broadcasting at 29.97 fps.
I did try your test and it didn't work. The resultant DVD folder from DMF4 still has audio video sync issues.

I downloaded a 30 day of DVD Lab Studio and it gave NO problems.
Finally, I've gotten the proper DVD with proper audio/video in sync.
DVD lab needs more work than Ulead however to author a dvd. Not a lot more, but still. From my first impressions Ulead DMF4 seemed to be a perfect solution for me to back up TV shows. Now it doesn't seem that way. Thanks for all your assistance GeorgeW.
Its very much appreciated.

Also - to maddrummer -- I did do a lot of research if you follow my posts and you'll see that I have picked up a bit on MPEG2 formats.
I do know DV is the best quality source at approx. 25Mbps and that MPEG2 is compressed. I mean thats what DV is - digital video.
Although MPEG2 was really not designed to be edited, software like VideoRedoPlus, Womble MPEG Video Wizard have proved that you CAN edit mpeg2 video and make perfect resultant DVD's. Granted there may be some open GOPS in the resultant mpeg2 files but overall they do a good job.

I really think its too bad that Ulead couldn't work well for all my video files.
I was beginning to like DMF4 for its easy of authoring and its simplicity.