Modifying MPEG2 header

[kovi]

Hi!

I have an 1080i video (video A). Not all frames are progressive, so it should be pulled down. I have another video (video B) which is also in 1080i format, and all the player software play it automatically pulled down.
I think the header or the frame structure is not set correctly in video A so the player software think all frames are progressive.
Is there a way to modify this MPEG2 without recompressing?
What settings describe the mpeg2 as telecined video? I can change the video to progressive or interlaced, but this is combined (some frames are interlaced, some are progressive...)

Thanks!

[mpucoder]

It is progressive frames that are pulled down, not the other way around.

[kovi]

It is progressive frames that are pulled down, not the other way around.

I looked the frames of video B in virtualdub via dgdecode film mode turned off and I saw the interlace lines (same as in video A). But when using DScaler as playback filter (in BSPalyer) the interlace lines do not appear. Nor with VLC.
But with video A, anywhere I play it interlace lines appear.
Both are 1080i, pulldownable... But video B is played back with real-time pulldown, video A is played back as progressive, with interlace lines...

[tigerman8u]

Dvdpatcher lets you change some of the header settings, You can look at it and see if it will help in what you are trying to do

[kovi]

Dvdpatcher lets you change some of the header settings, You can look at it and see if it will help in what you are trying to do

It lets only Resolution, fps, bitrate (why??) and AR.

http://www.wincesoft.de/assets/images/DVDPatcher_106.gif
(The image is from the author's site)

[neuron2]

If you are comparing flagged telecining to hard telecining (pulled down with actual extra fields inserted and flags not used), and you are thinking of just flagging the hard telecined one, I can tell you that it will make a big mess, unless you remove the extra actual fields. The right way is to IVTC the hard telecined video and then apply pulldown with existing tools.

If this doesn't apply to your situation, you can ignore it. :)

[SeeMoreDigital]

ReStream (http://shh.sysh.de/restream.html) is also another useful application to have in your arsenal of Mpeg tools: -

http://shh.sysh.de/pic/restream.png


Cheers

[tigerman8u]

If you are comparing flagged telecining to hard telecining (pulled down with actual extra fields inserted and flags not used), and you are thinking of just flagging the hard telecined one, I can tell you that it will make a big mess, unless you remove the extra actual fields. The right way is to IVTC the hard telecined video and then apply pulldown with existing tools.

If this doesn't apply to your situation, you can ignore it. :)

i've only used this program a couple of times to see what would happen if i patched a PAL format to a NTSC format and tried to play it in my dvd player. In the lower left it has "patch" first header only, and entire file. Question> can you tell me what the difference is ? thanks

[tigerman8u]

ReStream (http://shh.sysh.de/restream.html) is also another useful application to have in your arsenal of Mpeg tools: -

http://shh.sysh.de/pic/restream.png


Cheers

from what i'm seeing does "restream" basically do the same thing as dvdpatcher, ie change the header ? thanks