Toti
18th October 2002, 14:55
One thing that has stopped me dead in my tracks at encoding video is after I have ripped the video to my hard drive and analyse the Main Movie VOBs. I have noticed that alot of DVDs have FILM & NTSC based video mixed.
This translates problems when encoding since if you set the framerate to 24 then pulldown it will be outof sync with the audio. Here is one method I have tryied and it works sometimes.
Armageddon for example contains one or two NTSC interlace frames on the main movie. This particular movie I demux the video first and ended up with an MPEG stream. I then used pulldown.exe to disable all the flags. -no pulldown and -nortff. After I analysed the video it was all progressive no NTSC or interlace anywhere.
This is making me beleive that is there a flag to tell that the video is interlace instead of real progressive?
Some movies you have to Make them 24 FPS (DVD2AVI) then deinterlace them (AviUtil) after the encoding then use 3/2pulldown and drop down flag also set all frames to progressive. It works like a dream.
Some other movies you make them 24 FPS (DVD2AVI) and after the encoding use 3/2 pulldown and drop down flag also set all frames to progressive.
I have noticed that if you use 24 FPS in any video that is not 100% Film. It WILL have sync problems because is not 100% FILM. If you cut the NTSC parts of the movie then it should be fine. The problem is that Interlace-NTSC frames are introduced during the movie this is what screws up the sync.
I want to know what is it that other people are doing since this has been kicking me for a long time.
Thanks alot for everything.:confused:
This translates problems when encoding since if you set the framerate to 24 then pulldown it will be outof sync with the audio. Here is one method I have tryied and it works sometimes.
Armageddon for example contains one or two NTSC interlace frames on the main movie. This particular movie I demux the video first and ended up with an MPEG stream. I then used pulldown.exe to disable all the flags. -no pulldown and -nortff. After I analysed the video it was all progressive no NTSC or interlace anywhere.
This is making me beleive that is there a flag to tell that the video is interlace instead of real progressive?
Some movies you have to Make them 24 FPS (DVD2AVI) then deinterlace them (AviUtil) after the encoding then use 3/2pulldown and drop down flag also set all frames to progressive. It works like a dream.
Some other movies you make them 24 FPS (DVD2AVI) and after the encoding use 3/2 pulldown and drop down flag also set all frames to progressive.
I have noticed that if you use 24 FPS in any video that is not 100% Film. It WILL have sync problems because is not 100% FILM. If you cut the NTSC parts of the movie then it should be fine. The problem is that Interlace-NTSC frames are introduced during the movie this is what screws up the sync.
I want to know what is it that other people are doing since this has been kicking me for a long time.
Thanks alot for everything.:confused: