Aspect Ratio

[wks]

Hi all,first things first i am a noob and a old one at that. Could someone explain to me what is happening. I have a dvd with 5 episode's on and when played with the dvd player the are in 16:9. If i extract the episode's from the dvd and convert the vob's to mpeg's(TV does not like vob's) and put them on my nas drive they play on the TV in 4:3???. I checked the mpeg in mediainfo and it said 4:3. So why does the TV play the dvd in 16:9 and not mpeg

TIA
Bill

[DB83]

But do they really play as 16:9 from the dvd player ?


You appear to be describing a non-anamorphic dvd which is 16:9 in a 4:3 frame. So you should be getting letter-boxing bars top and bottom and pillar-boxing bars left and right.


Your tv (or the player) could well be zooming the image to hide these bars.

[Cornucopia]

Or,
You extracted them strangely, and they didn't just extract, but either lost their dar metadata/flags, or they were converted.

You said vobs->mpegs, but other than a few minor features, vobs ARE mpegs. Please, give more details on your process.

Scott

[wks]

Hi thanks for the quick reply. The dvd is played in full screen so could be zoomed but why does'nt the mpeg play in full screen?
TIA
Bill

[Case]

If i extract the episode's from the dvd and convert the vob's to mpeg's and put them on my nas drive they play on the TV in 4:3?

Possibly the conversion didn’t preserve the aspect ratio. What tools and settings did you use? Do these tools have an aspect ration setting?

[wks]

I used dvfab decrypter to extract the video ts folder then used vob2mpg to make one mpeg. The tv does not like vobs. I am trying to convert dvd episodes to mp4s to put on my nas drive.
TIA
Bill

[jagabo]

The IFO files can override the aspect ratio that's flagged in the VOB files. So even in the MPEG 2 data in the VOB files is flagged as 4:3 the IFO file can force the DVD player to treat it as 16:9. It's also possible the MPEG2 data includes a Sequence Display Extension to indicate the 4:3 AR is contained in a 540x480/576 portion of the frame. When the DVD player sees that it knows the full 720x480/576 frame is 16:9. TVs and standalone media players often don't respond to the extension.

Restream can adjust the AR and the Sequence Display Extension to "fix" the AR.

[ProWo]

If i extract the episode's from the dvd and convert the vob's to mpeg's(TV does not like vob's) and put them on my nas drive they play on the TV in 4:3???. I checked the mpeg in mediainfo and it said 4:3.

Remux the mpeg with MkvToolNix setting the videotrack DAR to 16:9

[wks]

A big thanks, managed to change the aspect ratio with MkvToolNix. I demuxed the video and then remuxed with MkvToolNix and had a sync issue so just put the whole video in MkvToolNix and remuxed and it worked. Another lesson learned thanks
Bill

[jagabo]

A big thanks, managed to change the aspect ratio with MkvToolNix.

Be aware that not all players will obey the MKV aspect ratio flag. Especially outside a computer (for example, the media player built into a TV or Blu-ray disc player).

[wks]

Hi i checked it on the tv and it was ok. I am going to convert to mp4. Also found a button on the tv marked ASPECT lol