interlace help

[jagabo]

"interlacing" and interlaced video would not cause it to playback with two images, top and bottom. Once again, that must be some special feature of that software, used to separate the two fields for further processing, and then to be woven back together later.

Interlaced frame:


Temporarily deinterlaced into over/under format for further processing:

[nymph4444]

Well if I do have VOB files that are Intrlaced

If I convert them to say MP4 H264 am I right that I sould not Interlace them.
Because I would just be Interlacing an Interlaced file?

And this will never look good

[jagabo]

If I convert them to say MP4 H264 am I right that I sould not Interlace them.
Because I would just be Interlacing an Interlaced file?

If the playback device can play interlaced MP4 files properly you can encode them interlaced. The way it's supposed to work:

1) Video comes out of the MPEG 2 decoder as uncompressed interlaced frames.
2) The h.264 takes those frames and encodes them in interlaced mode -- meaning it treats each field as a separate image internally.
3) At playback the h.264 decoder decompresses the video back to uncompressed interlaced frames, just like the frames that came out of MPEG 2 decoder in step 1.
4) The player does whatever is necessary to output those interlaced frames. If it's putting out an interlaced signal it sends one field at a time. If it's putting out a progressive signal it deinterlaces by some method.

[nymph4444]

Well I thought it did something like this but every program I came across for converting always had an Option to Interlace and an Option to Deinterlace.

So let me put it like this.
If I have a VOB file that is Interlaced and I want my output file to be Interlaced am I right that I would turn off Interlace and turn OFF De Interlace options?

And this will keep those things as the same as the sorce?

[jagabo]

If I have a VOB file that is Interlaced and I want my output file to be Interlaced am I right that I would turn off Interlace and turn OFF De Interlace options?

You tell the encoder the source is interlaced and you want it encoded interlaced. Since I don't know the software you are using I can't tell you what settings to choose.

[edDV]

If you stay with Handbreak I can help you. For other encoders you will need to read the manual to see what the buttons do.

Your Mach Speed Trio-View 5000 8GB HD Video Media Player takes in various formats including MPeg2 and h.264. The player processes video into an 800x400* 5" progressive display. It also exports HDMI but the player specs don't say which formats are output on HDMI. You will need to test it.
http://www.machspeed.com/v5000.html

You said it will play an interlace MPeg2 VOB correctly right? So did it play the interlace h.264 file correctly? Are you also playing to a TV over HDMI?

The manual says when the A/V or HDMI output is used, the player's screen is tirned off. They don't say what the output resolution is for the HDMI out. A/V would be 480i.
http://www.machspeed.com/manuals/v5000manual.pdf

The manual is poor for specs. Some are found in the footnotes like ...

The player supports a maximum 1280 x 1080 resolution video file, with support

for H.264 high-definition video coding

It’s supports video playing in multiple formats such as RM/RMVB,
AVI, MKV, VOB, MOV, DAT and FLV, etc. As parameters such as formats, bitrate,
codecs, framerates, and resolutions differ; the player will not be compatible
with all listed files. If you are experiencing issues playing your files on this
player, we recommend using a supported conversion tool to reconvert your file to
the specifications of the device.

*the manual says screen resolution is 800x480. All other specs say 800x400.

[nymph4444]

Well I am going to try Handbrake

But Media Coder and Format Factory are two programs that you can turn ON or turn OFF these Options.
And I aways thought that if your sorce file was say Interlaced you would not want to turn ON Interlkaced because you would be Interlaceing an already Interlaced file?

[edDV]

Well I am going to try Handbrake

But Media Coder and Format Factory are two programs that you can turn ON or turn OFF these Options.
And I aways thought that if your sorce file was say Interlaced you would not want to turn ON Interlkaced because you would be Interlaceing an already Interlaced file?

I don't know what that button does. Handbreak is very clear what each filter does.

How are the files playing on your Trio 5000? If the player can't handle the interlace files let me know. You did say it played the interlace VOB ok right?

Are you going to use the HDMI out?

[jagabo]

And I aways thought that if your sorce file was say Interlaced you would not want to turn ON Interlkaced because you would be Interlaceing an already Interlaced file?

How many times have I told you this? The word "interlaced" is being used as an adjective, not a verb. It's telling the encoder you want the video encoded interlaced. It's not telling the video to take two images and interlace them.

[nymph4444]

My Trio 5000 plays the VOB files as is ok.
And if I convert them to mp4 they still play ok.

But if I convert them and pick Interlace then they don't play ok.
They play as two videos one at top of screen and on at bottum of screen.

So I thought I sould not Interlace a video that was Interlaced to start with?
Am I right and what do you use to convert video files?

[edDV]

My Trio 5000 plays the VOB files as is ok.
And if I convert them to mp4 they still play ok.

But if I convert them and pick Interlace then they don't play ok.
They play as two videos one at top of screen and on at bottum of screen.

So I thought I sould not Interlace a video that was Interlaced to start with?
Am I right and what do you use to convert video files?

That button is causing the stacked video. Stop pushing it.

If the software is that poorly documented you need to analyze what is coming out of it. Run the file that works through mediainfo to see if it is interlace or progressive.

[nymph4444]

OK my VOB file is Interlaced to start with.

And any video converter that I come across does the same thing if I pick Interlace.

So tell me if a video is Interlaced to start with and I want to convert it but I want to keep it still interlaced what is the program I sould use?

[edDV]

OK my VOB file is Interlaced to start with.

And any video converter that I come across does the same thing if I pick Interlace.

So tell me if a video is Interlaced to start with and I want to convert it but I want to keep it still interlaced what is the program I sould use?

I gave you detailed instructions for Handbreak above.

[nymph4444]

Thank you I have Handbrake and it works but is a little diferant.
There is one called
MediaCoder

And it has a De Interlaceing option and it has Enable Disable Auto.
My gess is if it's on Auto it will De Interlace anything that is Interlaced.

So if I pick Disable it will not De Interlace so would I be right that it will just leave it as is the video I mean?

[edDV]

Mediacoder has 23 pages of menu screens. It is a more complex product. You are going to have to learn it if that is what you want to use. I don't see a manual.
http://www.mediacoderhq.com/screenshots.htm
Here is their forum
http://forum.mediacoderhq.com/

Handbreak is much easier to learn and has a good manual.

[nymph4444]

I know mediacoder does a lot but it does work and I seem to be ok.

I don't realy know what I am doing in Handbrake but I gess I can start with what I need help with.

All of the presets on the Right hand side I don't know if I sould use any of them.

I want to convert to
MP4 H264
640x480
29.97 fps
And keep it interlaced.
Video bit rate 500 bits per sec

So one the right hand side it is on Normale Option for the Preset is this ok?
And then I just go to the tabes and tweek it on the left in the main window?

[jagabo]

In MediaCoder if you want interlaced h.264 set the Deinterlace option to Disabled.

[edDV]

Handbreak settings are shown in posts

#95,#96 basic settings and procedure
#100 set bitrate
#103 all filters Off for interlace

[nymph4444]

Thank you and in Handbrake I whent through the video settings and I got to a List of things.
And one Box is a dropdown box for De Interlace and it is set to OFF.

So I left it set to OFF and the VOB file I am converting I know is Interlaced.

So I know it wont De Interlace it so will it leave it as Interlaced?

[edDV]

Thank you and in Handbrake I whent through the video settings and I got to a List of things.
And one Box is a dropdown box for De Interlace and it is set to OFF.

So I left it set to OFF and the VOB file I am converting I know is Interlaced.

So I know it wont De Interlace it so will it leave it as Interlaced?

Yes

Next step is to test playback on the media player. It should play but at 500 Kbps the quality will be less than the VOB.

[nymph4444]

Thank you Handbrake is good and the Interlace De Interlace option did not make it play in split screen.
You ware right the program I was useing must have just had that Bug.

Now just to see if I understand everything you told me about NTSC Interlace Brodcast.
Standard NTSC RES. = 640x480 interlaced
And frame rate = 29.97

And first the Top Fields are drawn on screen and as thy Fade away the Bottum Fields are drawn.
And every Field is it's own Image.

Do I have all this right?

And one thing am I right tht every Field only Takes a 60th of a sec to draw?

[edDV]

Thank you Handbrake is good and the Interlace De Interlace option did not make it play in split screen.
You ware right the program I was useing must have just had that Bug.

Now just to see if I understand everything you told me about NTSC Interlace Brodcast.
Standard NTSC RES. = 640x480 interlaced
And frame rate = 29.97

And first the Top Fields are drawn on screen and as thy Fade away the Bottum Fields are drawn.
And every Field is it's own Image.

Do I have all this right?

And one thing am I right tht every Field only Takes a 60th of a sec to draw?

Yes to all.

Was the player able to deal with interlace h.264? Some will some won't.

[nymph4444]

Yes the Player did play it ok so you ware right again if the Player can play VOB files then they know they are used in DVDs and some may be Interlaced or Prograsive so they make them to handle it.

And Handbrake is working out good thank you again for geting me use to it.
One thing though Handbrake says it can export to all diferant file types not just MP4. But on the main screen were you pick you imput files and then you pick your output folder you have the output file type dropdown list.

And it has mp4 and kmv just these two so how do you say output to mpeg or anything other??

And I forgot to ask If you have a VOB file that is Prograsive and you pick De Interlace option OFF what will it do with it then?

[edDV]

Yes the Player did play it ok so you ware right again if the Player can play VOB files then they know they are used in DVDs and some may be Interlaced or Prograsive so they make them to handle it.

And Handbrake is working out good thank you again for geting me use to it.
One thing though Handbrake says it can export to all diferant file types not just MP4. But on the main screen were you pick you imput files and then you pick your output folder you have the output file type dropdown list.

And it has mp4 and kmv just these two so how do you say output to mpeg or anything other???

The Handbreak author got overwhelmed so focused on h.264 (x.264) codec on either mkv or mp4 container which are mass geek markets.

And I forgot to ask If you have a VOB file that is Prograsive and you pick De Interlace option OFF what will it do with it then?

If the file is progressive 23.976, 59.94 fps then you recode-resize that way.

[nymph4444]

I have two things I need to know.

I did go to Handbrake web site and joined the forums but no one got back to me.
I know you told me if I have a VOB file that is Interlaced and I want it to stay Interlaced after converting it just turn of De Interlace.

But what if my VOB file is in Prograsive and I want to keep it in Prograsive I do not turn on De Interlace do I?
I know I asked this but when I got your last reply this part was Blank.

And 2. am I right that a prograsive CRT will go down the screen and draw all the Lines one after the other?

Od Line Even Line Od Line Even Line

[jagabo]

But what if my VOB file is in Prograsive and I want to keep it in Prograsive I do not turn on De Interlace do I?

Do not use Deinterlace on progressive material.

And 2. am I right that a prograsive CRT will go down the screen and draw all the Lines one after the other?

Yes.

Now just to see if I understand everything you told me about NTSC Interlace Brodcast.
Standard NTSC RES. = 640x480 interlaced

This isn't quite accurate. Analog signals don't have pixels. You can capture that analog wave form with whatever number of samples (pixels) you like. Conversely, you can produce an analog wave from from whatever samples you like. The more samples you use, the more accurate the digital representation. DVD can use 720, 704, or 352. SVCD uses 480.

This article discusses analog to digital conversion of audio but the concept is the same:
http://www.howstuffworks.com/analog-digital3.htm

[nymph4444]

So this is why thay say standard Interlaced NTSC is 252 Lines they mean 252 Interlaced Lines left to right am I right?

And about Handbrake I open Ad To Que but how do I ad a Lot of files to convert at one time?

[jagabo]

So this is why thay say standard Interlaced NTSC is 252 Lines they mean 252 Interlaced Lines left to right am I right?

252? You mean 525? The timing for the analog signal is 525 scan lines. Only 485 (or 486 depending on how you want to count) contain picture information.

[nymph4444]

So if the Horizontal number is 525 Lines

What was the Hight?

And I when to Handbrake and looked up ad to queue and the page did not load.
How do I ad a lot of files to the queue in Handbrake?

[jagabo]

So if the Horizontal number is 525 Lines

What was the Hight?

That is the height. The timing of the signal (two fields) is 525 scan lines.

http://en.wikipedia.org/wiki/Video#Display_resolution

the horizontal measurement varies with the quality of the signal: approximately 320 pixels per scanline for VCR quality, 400 pixels for TV broadcasts, and 720 pixels for DVD sources.

http://www.cardinalpeak.com/blog/?p=343