Bluray at 24p

[factol]

I have a 24p video, edited in Vegas Studio hd 11, output as 24p mpeg2. I'm trying to output to Bluray and noticed that DVD Arch Studio 5 was recompressing the mpeg2. Looks like the reason it's recompressing is because the video is 24p. When I look at the project options frame rate I see 24p is listed but says it's not supported by this product.

Am I missing something? Does DVD Arch Studio 5 really not have 24p or am I setting something up wrong?

I've read online that Bluray had to be either 25 or 30 fps anyway. If this is the case should I not even be recording in 24p to start with or does the recompression of he 24p video keep the same look as the original 24p?

[Steve Grisetti]

Is the video you're porting from Vegas to DVD Architect 1440x1080?

Remember, BluRay is designed to be played on a TV. Television uses non-square pixels. So the video that DVD Architect creates on your BluRay disc to produce a 16:9 picture is 1440x1080.

Meantime, is your TV capable of playing 24p? How about your disc player? You may find that all of your effort to create a 24p workflow is in vain anyway, since ultimately it's going to play on your TV at a standard frame rate.

Also, how is your audio set up in this video you're porting from Vegas? Unless it's set up as PCM, the transcoding you're seeing might be the audio rather than the video.

[factol]

Yes, the output from Vegas is 1440x1080. I did notice the bitrate for the video coming out of Vegas is 30 but DVD Architect has to drop it to 23.something to fit it on the bluray. Could that be the real reason it has to recompress and DVD Architect is just listing the wrong reason?

I'll try a small clip with the same settings and see if it has the same issues.

[Steve Grisetti]

DVD Arch shouldn't have to degrees the bitrate unless your video is longer than 2 hours. Is it?

[Chris B]

DVDAS is quite fussy about having exactly compliant streams for it's disc creation - and even streams that have the wrong "container" are re-rendered rather then being repacked to the right format.

However - there are presents that do not generally re-render when creating blurays. Try using the ones called (and I'm working on VMS10 here so they may be slightly different names) "Blu-ray 1440x1080-24p, 25 Mbps video stream" or "Blu-ray 1920x1080-24p, 25 Mbps video stream" (dependent on your original source material - there's no point moving to 1920 if your source is 1440). Obviously if you end file is too large to fit on the disk (23GB or thereabouts) DVDAS will try and re-render anyway. If that's the case you could render as sony AVC but again use the BluRay Video Stream templates as your basis and adjust for frame rate, progressive etc.

Note that these are only video streams so you'll have to render an audio stream as well as a wave (.WAV) file. If you call it the same name as video stream then the program will automatically pick it up. DVDAS won't use .ac3 files on BluRay disks (DVDA Pro will).

Btw - A lot of HD TVs do use square pixels (Mine has a native resolution of 1920 by 1080.) but they are usually very good at dealing with sources that are not their native resolution.

[Chris B]

Oh - and one final thing - is your DVDAS project 24p - or 23.975p (They are both available!) Check that your render settings match your project settings (you can mix media formats - but again it can be a bit hit and miss).

[Chris B]

And really finally - I've just tried to do this as a test - and DVDAS recompressed it - and told me that the "reason for re-compression" was that "24p media is not supported by this product" although it's re-rendered to a 24p file in to ISO

[factol]

I double checked my settings , all 23.975p 1440x1080 (both in vegas studio hd 11 and dvd arch 5), and did a small 2 min clip. Same results. For some reason, dvd arch defaults to a bitrate of 18. I changed that to 30 but still same results. I think sony knows I have a slow computer and is making me recompress as punishment.

[John 'twosheds' McDonald]

I think sony knows I have a slow computer and is making me recompress as punishment.