Encore inflates file size enormously on Blu Ray

[nilsb13505332]

Hello,

I'm trying to burn a Blu Ray with 50GB (BD-R). When I import my film (~1.3GB) it somehow results in 11GB on the disk! The file size is displayed correctly in the project manager!

That's kind of frustrating as I need to put 5 films on that disk, which is impossible as this happens with all films (I end up at 52GB whereas the file sizes together are only 6,5GB)

They are converted to mp4, 720p with 30FPS.

I can't see why this is happening and therefor can't find a solution!

Any help is appreciated.

Regards

[Stan Jones]

What does the file show in the Encore project panel under the Blu-ray Transcode Status?

More than one reason this can happen....

Bringing an .mp4 into Encore (rather than .m4v and audio) invites Encore retranscoding. What does it say?

[nilsb13505332]

It says "not transcoded" and blu ray transcode settings says "automatic"

(I guess, I'm using german as my primary languege)

[Stan Jones]

Did you export from PR? How long in minutes is each video?

Edit: the "automatic" means Encore will set the transcode settings to fill the disk. You can't use the results of the partial build to apply to the rest of the disk. But it is a mistake to let Encore make these decisions.

Export from PR/AME as H.264 Blu-ray, and use a bitrate calculator to get the filesize correct.

DVD-HQ : Bitrate & GOP calculator

[nilsb13505332]

so...every movie is around 125 minutes long. The files itlself are around 1,5 -2 GB. If I wanted to burn them with burnaware eg, it shows that there are still 25 GB available. Only Encore makes files enormously bigger than they really are. I exported one movie using Media Encoder to H.264 Blu-Ray which resulted in a 12 GB file.

[Stan Jones]

That's a pretty low datarate for 720p?

No matter, the reason Encore is making big files is that a) you are importing files that are not BD legal and b) you are allowing Encore to determine datarate and therefore size ("automatic" transcode setting). The preferred method is to determine your datarate needs and export from PR/AME (or whatever your editing platform) as BD legal so Encore will not transcode. Or, if you are going to let Encore retranscode, modify the transcode setting to provide the datarate/size constraint.

[SAFEHARBOR11]

Let me guess, movies were perhaps downloaded .mkv files before you converted to .mp4?

Blu-ray video uses a much higher bitrate than download movies, therefore the resulting size on disc will be inflated. Don't expect to fit 10+ hours of video onto a BD-R, not meant to work that way.

Thanks

Jeff

[Stan Jones]

Also, you appear to be using a "720p 30" file. That does not appear to be BD legal:

Encore-supported Blu-ray Formats

[neil wilkes]

You're right, Stan - it certainly isn't.

BD legal resolutions are as follows:

i/.    1920x1080 (aka"Full HD") allowing frame rates of 29.97i, 25i, 24p and 23.976p

ii/.    1440x1080 allowing frame rates of 29.97i, 25i, 24p and 23.96p

iii/.    1280x720 allowing frame rates of 59.94p, 50p, 24p and 23.976p

iv/.    720x576 allowing a frame rate of 25i

v/.    720x480 allowing a frame rate of 29.97i

Source files sound to me like massively lossy compressed - HD equivalent of DivX (do you remember the aggravation we used to get with DivX and XviD files?) or something very similar. Whilst it is possible to get 10 hours of HD footage on a BD, you will need to do some serious bit budgeting and because you will be recompressing something already heavily compressed the results will be unpredictable

[neil wilkes]

nilsb13505332  wrote

Hello,

I'm trying to burn a Blu Ray with 50GB (BD-R). When I import my film (~1.3GB) it somehow results in 11GB on the disk! The file size is displayed correctly in the project manager!

That's kind of frustrating as I need to put 5 films on that disk, which is impossible as this happens with all films (I end up at 52GB whereas the file sizes together are only 6,5GB)

They are converted to mp4, 720p with 30FPS.

I can't see why this is happening and therefor can't find a solution!

Any help is appreciated.

Regards

Hiya.

Can you please download & install the free MediaInfo application, and post the text file back detailing what these film file types are please? 1.3Gb for a 2 hour film sounds to me like a massively lossy thing - I would expect to see ten times that for a high quality film, although the source is important.