re-encode VOBs?

[KMJvet]

I hope this is a simple question for someone.....

 

Why does Toast re-encode my VOBs when making a DVD even when "Never Re-encode" is chosen on the Custom setting?

[tsantee]

Thanks. That is the data I got by loading it in mpeg streamclip. I thought that was a good way to get accurate into, but I guess it's not. One question to help me with my ignorance on interlaced vs progressive, don't some players play progressive just fine. Somehow I thought they do if you play the signal out via component cables. I know interlaced it good for playing on TVs, but I guess I'm missing why TOAST would need to make it interlaced. Sorry if that's too basic a question and I should know, but I don't.

The video DVD spec is 480i so all video DVDs are interlaced. The players typically have circuitry to convert interlace to progressive as part of playback to a TV connected via Component or HDMI cables. This is one of the reasons video DVD is not a format for the future. Steve Jobs yesterday commented when talking about the changes in iDVD 08 "There are some people who still want to make DVDs." My prognosis is within 10 years we won't play any media on round discs. But for now I'm still make quite a few.

[KMJvet]

The video DVD spec is 480i so all video DVDs are interlaced. The players typically have circuitry to convert interlace to progressive as part of playback to a TV connected via Component or HDMI cables. This is one of the reasons video DVD is not a format for the future. Steve Jobs yesterday commented when talking about the changes in iDVD 08 "There are some people who still want to make DVDs." My prognosis is within 10 years we won't play any media on round discs. But for now I'm still make quite a few.

 

Ahh...makes sense, thanks much.

[KMJvet]

So....I went to VHub support since I couldn't figure out how to make the mpgs interlaced. They had me make VOBs instead. Then, within TOAST to, within Custom, change the Field Dominance to Progressive. So, I did that and the first disc I made worked fine without any re-encoding. And now things get really weird. I did the same exact process with the next set of 3 avis and it did re-encode. Just too weird....I can't begin to fathom what's different between when it worked and when it didn't. I double and triple checked the settings and they were the same.

[KMJvet]

My theory was wrong...I had converted all of it to NTSC. To avoid extracting from VOB issues, I tried mpg.

 

By looking at these paramaters, can anyone spot why Toast thinks it needs to re-encode these?

 

Duration: 0:44:47

Data Size: 1.27 GB

Bit Rate: 4.07 Mbps

 

Video Tracks:

224 MPEG-2, 704 × 480, 29.97 fps, 104.86 Mbps, progressive

 

Audio Tracks:

192 MP2 stereo, 48 kHz, 128 kbps

 

thanks

[tsantee]

It will do that if Toast determines the video is too far out of spec for video DVD. Are your VOB's in a VIDEO_TS folder? In that case you should place the VIDEO_TS folder on the desktop (or in the movies folder but not inside any other folder) choose DVD with the top button of the Toast Media Browser and then use the browser to drag the desired videos to the Video window. This causes Toast to extract the MPEGs from the VOBs and greatly reduces problems with Toast's reading of the VOBs.

[tsantee]

My theory was wrong...I had converted all of it to NTSC. To avoid extracting from VOB issues, I tried mpg.

 

By looking at these paramaters, can anyone spot why Toast thinks it needs to re-encode these?

 

Duration: 0:44:47

Data Size: 1.27 GB

Bit Rate: 4.07 Mbps

 

Video Tracks:

224 MPEG-2, 704 × 480, 29.97 fps, 104.86 Mbps, progressive

 

Audio Tracks:

192 MP2 stereo, 48 kHz, 128 kbps

 

thanks

The description of the video tracks is 104.86 Mbps (obviously incorrect because the combined rate is just 4.07 Mbps) while the maximum for video DVD is 9.8 Mbps. I think what matters most though is it is progressive so Toast must re-encode it as interlaced video to be playable as a video DVD.

[KMJvet]

The description of the video tracks is 104.86 Mbps (obviously incorrect because the combined rate is just 4.07 Mbps) while the maximum for video DVD is 9.8 Mbps. I think what matters most though is it is progressive so Toast must re-encode it as interlaced video to be playable as a video DVD.

Thanks. That is the data I got by loading it in mpeg streamclip. I thought that was a good way to get accurate into, but I guess it's not. One question to help me with my ignorance on interlaced vs progressive, don't some players play progressive just fine. Somehow I thought they do if you play the signal out via component cables. I know interlaced it good for playing on TVs, but I guess I'm missing why TOAST would need to make it interlaced. Sorry if that's too basic a question and I should know, but I don't.

[KMJvet]

It will do that if Toast determines the video is too far out of spec for video DVD. Are your VOB's in a VIDEO_TS folder? In that case you should place the VIDEO_TS folder on the desktop (or in the movies folder but not inside any other folder) choose DVD with the top button of the Toast Media Browser and then use the browser to drag the desired videos to the Video window. This causes Toast to extract the MPEGs from the VOBs and greatly reduces problems with Toast's reading of the VOBs.

 

Thanks. They're loose VOBs and I just dragged them in, but I should perhaps use the Media Browser method as a matter of routine. You're suggestion "out of spec" made me wonder if it's a PAL NTSC issue. I made the VOB from an avi using VisualHub and I wonder if it was PAL whereas the DV file I was adding to the same disc was NTSC and the two can't co-exist on a disc.