576p to 576i

[shon3i]

My goal is to convert my DVD's to AVCHD/Blu-Ray compactible streams. From AVCHD spec, i need to use 720x576 50i. I have no idea how to that. Maybe i asking on wrong forum?

[Comatose]

ChangeFPS(50)
AssumeTFF()
SeparateFields()
SelectEvery(4,0,3)
Weave()
should do the job

But you said DVDs. Are they really 576p?
The encoded-as-progressive DVDs are pretty rare. You probably just have to re-encode to H.264 in interlaced mode.

[Blue_MiSfit]

I think you might be able to just apply soft pulldown

[2Bdecided]

Re-wind a second.

Firstly, are you saying that Blu-Ray can't support 576p25?

Secondly, isn't AVCHD, er, HD? 576i50 is SD.

Thirdly, "native" 25p vs 25p-wrapped-in-50i isn't something that you change within AVIsynth - both look indentical in AVIsynth. These are encoder flags / settings.

Hope this helps.

Cheers,
David.

[mp3dom]

Bluray does not support 25p video. Only 23.98 and 24
PAL progressive encoding is quite common now since all dvd players can handle it without problems. Also some deinterlacer (the not motion-adaptive ones) read the encoding flag to switch between video and film mode.
If you have a true 25p video you just need to encode it as interlaced to obtain a 25 PsF (25p film with a 50i video encoding, 2:2 pulldown)

[Blue_MiSfit]

So... that means not touching the video at all, and simply encoding it as interlaced... right?

~MiSfit

[mp3dom]

So... that means not touching the video at all, and simply encoding it as interlaced... right?
~MiSfit

Exactly! :)

[2Bdecided]

Bluray does not support 25p video.What, not in any resolution?! That's amazing!

It's not that I don't believe you - I've looked and found the same as you - I just can't believe the next generation optical disc is going to be crippled for us Europeans like that!

Still, it's crippled for Americans too - 30p content isn't supported either, though that's far less common.

Lots of European TV is shot at 25p now (not 24p). It seems ridiculous that it'll have to be slowed down (or encoded as 50i) to put it onto BluRay. It's a step backwards!

And, of course, many players/TVs will display the 24p as 60i, meaning our lovely pristine 25p content gets slowed down, and then has 3-2 pulldown motion judder added!

Cheers,
David.

[G_M_C]

See here for the "official" formats; click (http://www.emedialive.com/articles/readarticle.aspx?articleid=11397#iif)

But i've recently made a BD9 @ 1080p25 through tsMuxeR, and my pana db30 plays them fine. So all-in-all i dont know; 576p25 might actually work ;)

[2Bdecided]

Interesting - there's not even 24p for SD!

I wonder about 24p-in-60i the way it's done for DVD - I assume that's compatible (it's a 60i MPEG-2 stream, after all) - it'll play, but will it be deinterlaced correctly?

In MPEG-2 the difference between 25p and 50i is so small that the BD part might just pass it through, and I guess almost any MPEG decoder should handle both just fine since both can be found on DVD - you'd have to break the existing compatibility to make it stop working. You could hope that the same would be true of the HD formats, depending on the codec implementation. It's not nice having something that you can't rely upon though!

Maybe if it gets enough unofficial support it'll become "official". Not hopeful though - the UK content I've seen on BD has been converted to 60i!!!

Cheers,
David.

[mp3dom]

If you encode 25p in 50i (interlaced flag) the stream is accepted but both CineVision (mpeg2/vc-1/h.264 encoder for bluray) and Scenarist BD reject an mpeg2 with 25p flag... so I assume tsMuxeR makes "illegal" (by specs) compile... even if it plays fine at the end (probably it depends by the player).
And... yes, BD is not-so-good for the european PAL standard (excluding the cinema 24p framerate)... contrary to HD-DVD (where 25p were supported via a firmware upgrade)