25fps to Bluray

[John Rofrano]

[chris evans] “I have a 1920×1080 project at 25fps with 5.1 audio

What should I render the video and audio to? I am using Vegas Pro 11. I want to then create a titled bluray with DVD Architect 5.0”

For video you can either render to Sony AVC with the Blu-ray 1920×1080-50i, 16 Mbps video stream template or MainConcept MPEG-2 with the Blu-ray 1920×1080-50i, 25 Mbps video stream template. The quality is about the same between the two so the choice is yours.

The audio should be rendered as Dolby Digital AC-3 Pro with the 5.1 Surround DVD template. Give it the same name as the video but with the .ac3 extension and DVD Architect will know that they go together and bring in the audio with the video.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Chris Evans]

Thanks.

I am still quite green to all of this, but getting there slowly. I find myself getting confused between fps and interlaced/progressive. I have a Panaxonic X900 camera and I have been shooting in the (1920 x 1080) / HA (17Mbps / VBR) mode so far, but have 1080/ 50p (28Mbps / VBR) available as an option.

Can I just post the text results from Media Info of the original clips here and could you have a look to see how I should have set up the project for best results? And also, if the same render suggestions you made still apply?

I will post the media info results in the next reply to this thread.

[Chris Evans]

Heres the results from Media Info on the source files. Like I say, want to know best settings for the Vegas Project and then best way to render out to Bluray.

And, am I better in the future using the 1080/ 50p (28Mbps / VBR) mode on the camera? And if so, what project and render settings should I use then? And, would it make a big difference?

Thanks again.

General
ID : 1 (0x1)
Complete name : E:\My Videos\Sony Vegas Projects\HD_2\AVCHD\BDMV\STREAM\00002.MTS
Format : BDAV
Format/Info : Blu-ray Video
File size : 21.9 MiB
Duration : 10s 551ms
Overall bit rate mode : Variable
Overall bit rate : 17.4 Mbps
Maximum Overall bit rate : 18.0 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Format settings, GOP : M=3, N=12
Codec ID : 27
Duration : 10s 480ms
Bit rate mode : Variable
Bit rate : 16.4 Mbps
Maximum bit rate : 16.8 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.315
Stream size : 20.4 MiB (93%)

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 10s 560ms
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -80ms
Stream size : 495 KiB (2%)

Text
ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Duration : 10s 16ms
Delay relative to video : -80ms

[John Rofrano]

[chris evans] “I find myself getting confused between fps and interlaced/progressive.”

Frames Per Second is the same for both interlaced and progressive. When you see something like 50i they are not talking about frames. They are talking about FIELDS. Since it takes two interlaced fields to make up one frame, you simply divide the number in half to get frames. So 50i is 25 fps and 25p is 25 fps and 50p is 50 fps.

[chris evans] “I have a Panaxonic X900 camera and I have been shooting in the (1920 x 1080) / HA (17Mbps / VBR) mode so far, but have 1080/ 50p (28Mbps / VBR) available as an option.”

If you shoot (1920 x 1080) / HA (17Mbps / VBR) then using Sony AVC with the Blu-ray 1920×1080-50i, 16 Mbps video stream template is pretty close and should yield very close quality to your source (I doubt you will see 1Mbps difference)

~jr

http://www.johnrofrano.com
http://www.vasst.com

[John Rofrano]

[chris evans] “Like I say, want to know best settings for the Vegas Project and then best way to render out to Bluray.”

For your project settings, if you don’t want any surprises when you render, set your project to match your output properties. If you want to maintain the full properties of your source video, set your project to match your source. You will definitely get a better editing experience by having your project match your source. The real key is to record in the appropriate format to begin with. Unless you are doing some special effects slow motion that requires 50p I would shoot in 25p.

For rendering you don’t get a choice. Blu-ray does not support 50p or 25p so 50i is your only choice.

[chris evans] “And, am I better in the future using the 1080/ 50p (28Mbps / VBR) mode on the camera? And if so, what project and render settings should I use then? And, would it make a big difference?”

No. You are better off using (1920 x 1080) / HA (17Mbps / VBR) mode becasue it is already Blu-ray compliant.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Chris Evans]

Fantastic. That’s all good to know and very clear. Thank you.

I am on the right track it seems.

[John Rofrano]

You’re welcome. Glad I could help. 🙂

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Riccardo Leone]

So, as I understood, if the project is in 25fps I just render it in 50i (that’s 25fps anyway, with 50 fields), and that just works fine.

Question: if I try to render a 25fps project to burn a dvd for the US, what should I do? I know I should have started the project in ntsc, but since it is already done what is my best option?

1) render in 50i, burn that and the US folks will cope with that.
2) render the 25fps project as if it was in 30fps.
3) change the project settings and then render.
4) give up any hope to get a decent result.

Thanks for the help!

[John Rofrano]

U.S. Folks can’t cope with 50i. Unlike PAL countries that have DVD players that also play NTSC, there are no NTSC DVD players that I know of that play PAL so “coping” is not an option; it simply won’t work.

I would render to 24p and produce a valid NTSC 24p Widscreen DVD. This is very close to your original 25fps and should look fine.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Riccardo Leone]

Thanks for the answer. So I’ll do that – rendering in 24p – if that’s the best I can do.

Just wondering, is there a technical problem for NTSC dvd player that prevent them to read PAL as well, or you think it’s just because there is no market demand? If PAL dvd players can read 30fps why don’t NTSC ones read 25fps? And after all, why do we keep using two different sistems!?