About Blue-Ray

[Haddock]

Hello,

After finishing a BD that works perfectly on my new Samsung UBD-K8500... I have de C(D)uriosity to examine the structure created and the type of files in the stream folder.

They are of *.m2ts type.... (codec is of course H.264).

First question : is this the universal standard ? (I was believing MP4)

I have to present this movie in a theater. Operator tell me that a BD has sometimes "bugg". So I will take my Samsung with me (only a HDMI output).

Operators ask me to also take a file on hard disk. ....

Second question :what should I do to have the best quality :

a) Copy the complete film create by Edius in the BD-Temp wich is also a m2ts of 15 GB

b) Create a new file in MP4 (transfer rate around 16 Mbt/s) ?

Thanks to advice

[antonsvideo]

make a Blu-ray with mpeg2 codec and you won't have an issue and encoding is super fast and quality is A1

using H264 for Blu-ray is iffy depending on intel graphics driver if hardware encoding is used

[Haddock]

make a Blu-ray with mpeg2 codec and you won't have an issue and encoding is super fast and quality is A1

using H264 for Blu-ray is iffy depending on intel graphics driver if hardware encoding is used

Thanks Anton, I did not know I can change codec in the Edius menu of BD

I try immediately and come back to you

[antonsvideo]

Thanks Anton, I did not know I can change codec in the Edius menu of BD

I try immediately and come back to you

you will come back quickly because so fast it is

Yoda

[Jerry]

There is a catch with this. If your project is large and you use 30-35M to encode, you may not have enough space on the disc. For a file, it isn't a problem.

I've never had an issue with a BD master using H.264(x,264). I'll do a test with QS, but my masters are always CPU driven and created using the TMPGE plugin using dual pass. It takes longer, but the quality is stunning.

Try using the Edius 9 Native H.264 encoder.

[Bassman]

My quality cutoff is around 20,000-25,000 mbps for the mpeg-2 codec. Anything that requires a lower bitrate to fit on the disc I then switch to mpeg-4.

A disc at full mpeg-2 bitrates (38500mbps) can be up to about 1 hour15min and 25,000mbps will get you about 2 hours.

No doubt the mpeg-4 codec is a more efficient codec and produces better results, especially at lower bitrates. But there is a time tradeoff.

In the early days, there was a compatibility question mark with the mpeg-4 but I would say that is gone by now. If you use the TMPG encoding plugin, the mpeg-4 encoding is actually wrapped in an mpeg-2 container. So it does seem like the BD format favors mpeg-2.

[Haddock]

Thanks Anton, I did not know I can change codec in the Edius menu of BD

I try immediately and come back to you

So I have done the new BD with the MPG2 codec.

Speed of encoding is faster as you predict... (Never mistake, He does)
Burning is of course same time

Files are as big as the H.264 version (also m2ts) and TR is 24000 Kbits/s.

On screen the quality is perfect.

Quality question : does it mean that using the mpg2 codec will give a beter quality then H.264 ?

Last question : I suppose that as backup I may copy on HD and use the temporary m2ts file created by Edius before burning ???

Thanks to confirm

[Andreas_Gumm]

Recommendations to use MPEG2 for BD-output are a bit
outdated these times due to the limited codec efficiency.
QuickSync is good enough at average bitrates higher than 20-25 MBIt.
M2TS ist the mandatory container format for Blu-ray disc.
MP4 is more common for web, tablets and smartphones.

I would suggest you for MP4 delivery at high quality,
export to GrassValley HQ codec and encode an MP4 File using the excellent tool Handbrake.

Andreas

[Bassman]

Quality question : does it mean that using the mpg2 codec will give a beter quality then H.264 ?

Last question : I suppose that as backup I may copy on HD and use the temporary m2ts file created by Edius before burning ???

Thanks to confirm

Mpeg-2 is an older, less efficient codec than mpeg-4. So mpeg-2 will not give you better quality but it can give you just as good or very good quality if you keep the bitrate above 20,000mbps. It gets down to who will notice the difference? Side by side, each with enough bitrate it might be tough to tell unless you look close.

[Haddock]

There is a catch with this. If your project is large and you use 30-35M to encode, you may not have enough space on the disc. For a file, it isn't a problem.

I've never had an issue with a BD master using H.264(x,264). I'll do a test with QS, but my masters are always CPU driven and created using the TMPGE plugin using dual pass. It takes longer, but the quality is stunning.

Try using the Edius 9 Native H.264 encoder.

Thanks Jerry... I never had a problem also, it was just a experience of an operator in a theater... who declared some buggs....

I ask advice to be prudent. I am on 8.53 so....

[Haddock]

Recommendations to use MPEG2 for BD-output are a bit
outdated these times due to the limited codec efficiency.
QuickSync is good enough at average bitrates higher than 20-25 MBIt.
M2TS ist the mandatory container format for Blu-ray disc.
MP4 is more common for web, tablets and smartphones.

I would suggest you for MP4 delivery at high quality,
export to GrassValley HQ codec and encode an MP4 File using the excellent tool Handbrake.

Andreas

Thanks for advice... sometimes TV or beamer (with years) refuse to read the high level of MP4, so I stay in main with 18 M.

Thanks anyway

[Haddock]

Mpeg-2 is an older, less efficient codec than mpeg-4. So mpeg-2 will not give you better quality but it can give you just as good or very good quality if you keep the bitrate above 20,000mbps. It gets down to who will notice the difference? Side by side, each with enough bitrate it might be tough to tell unless you look close.

Good to know.... as you say "look close" to sea differences.

Here is the final result of both files based on H.264 & MP2G

[Bassman]

I see your audio is set to 256 Kbps. This is a fine setting but I always go to 384 Kbps if space allows. The AC3 codec is very good but I think of how far away 256 is from the ~1500 of PCM.

[Haddock]

I see your audio is set to 256 Kbps. This is a fine setting but I always go to 384 Kbps if space allows. The AC3 codec is very good but I think of how far away 256 is from the ~1500 of PCM.

Thanks also for these info. I will care to give sound a wider space

[Ron Evans]

If the program length is over 2 hours like mine are there is a noticeable difference in quality between m2ts and mpeg2 since bitrate has to be lower for mpeg2 to get on the disc. I also never use less than 384kbps for BLuray and if the program is audio critical I use LPCM if I can get on the disc with m2ts even dropping the rate to get the audio on. QS even at 19Mbps is good for my subject matter. For singers or choir etc it is better to drop the video rate ( they are likely not moving much ) and use LPCM to get the good audio that is the subject matter of the disc really.