AVCHD to Blu-Ray H.264 with minimum/no recompression? Possible?

Hi all:
I'm wondering: What is the best way to preserve the quality of my AVCHD-based timeline when exporting as Blu-Ray-compatible H.264? My feeble understanding of AVCHD is that it *is* H.264, which would suggest that very little transcoding would be required to make it ready for Blu-Ray. However, Adobe Media Encoder always requires you to choose a quality, bitrate, etc., which has me thinking that it will always recompress. I don't see any "leave it alone if possible" option.
Thoughts? Suggestions?
Very best,
Aaron

Hi,
You are right Adobe Media Encoder does not provide any "leave it alone if possible" kind of option.
But to preserve the quality of the source AVCHD one could do the following.
1.Keep the value of bitrate high (as already pointed out by you).
2.Use VBR 2 pass encode.
3.Also if you notice on the "extreme right" of the AME settings window next to the video,audio etc tabs there is a flyout menu,if one clicks on that one gets an option of "Use Maximum render Quality"
using that will also help preserve the quality of the source.
please mind that all of the above are costly operations in terms of time.

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AVCHD to Blu-ray yields out-of-sync audio when not using TS

I have a need (won't go into too many details) to render my AVCHD project as separate M4V and WAV files; I can't have the output be multiplexed as a TS. However, the audio is horribly out-of-sync unless I output as a TS. For example, if I load up a timeline with ~40min of clips from my Sony HDR-CX12 AVCHD camcorder and render as Blu-ray H.264 1920x1080i, non-multiplexed, with PCM audio, the resultant WAV file is a full four seconds shorter than the M4V file! Ouch!! I'm guessing each AVCHD clip has just slightly less audio than video, and that it just adds up in the end, but why can't Premiere accomodate this? Is there a way to have it introduce delay at each cut? Obviously, the packetizing/multiplexing process for a TS accounts for this, but again, I can't use a TS; I need a WAV file that's in step with the video.
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> Could this be a DF versus NDF issue?
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> use a Time Stretching effect
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Hi
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I just checked:
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You don't say how much free, defragmented hard drive space you have but, unless it's a hundred or so gigabytes, that too could be a challenge.
I'd recommend doing a test run with 1 hour, or even half an hour, of video -- just to make sure everything is working.
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Thanks for the reply, unfortunatley I have tried the idea of transcoding the footage and exportig to encore by importing assets and it freezes and Encore hangs there without any response. I think I have lost the last hair in my head trying to figure this out. I am not sure if the imported file is too large for Encore to import as the file is almost 14G but it is very frustrating. I was thinking of going to CS5 but I wanted to up-grade to Windows 7 and have been hearing a lot of issues with CS5 running correctly, so I am waiting till they get all the bugs worked out with that. Also I was curious in CS5 is Encore a true 64 bit program now along with the Media Encoder and Encore or is it just Premiere Pro that is 64 bit? This is one of the reasons I had moved from CS3 to CS4 is because I thought the entire CS4 Master collection was 64 bit only to find out it was just Photoshop. It did work out some issues with Flash that I was having as well as Acrobat, but I want true 64 bit rendering. Please let me know Thanks again. Joe

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All good so far ?
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rufkaz wrote:
As far as I understand AVCHD from my Panasonic TM300, via log and transfer is decoded to apple codec. Then I work on those files. After editing I can export to quick time movie and then (using for example toast) burn it as a blue ray disc.
All good so far ?
Yes, with a 20 minutes limit and fixed predesigned menus from toast. The resulting BR DVD will play fine in Sony PS3. I don't know about other BR players.
Do I have a full HD (1920x1080) blue ray disc ?
No, 1280X720 only.
Second question is: what is the way to save my work for future ?
Before Panasonic TM300 I was using Sony HDR HC3 and after editing I was just printing to video which means printing to mini DV tape using this camera. If I clear my hard drive I always had a copy of edited movie in HD on the tape.
Now I have Panasonic TM300 which record in avchd. Can put edited video back to camera using print to video option ? Will it code that video back to Mpeg4 and upload that to camera hard drive ? or it only works with a tape and I need to use old camera to back up my edited video.
No print to tape operation with AVCHD.
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Hello all,
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Jeff,
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Some obvious but necessary checks:
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Are you checking the transcode status column for Blu-ray and not DVD? Definitely looking at the transcode status for Blu-Ray, and not DVD.
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Are you using elementary streams? If so, try multiplexed.
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While playing within Encore with the "Preview From Here" feature doesn't show any problem, burning (either directly from Encore, or from file with ImgBurn) and playing for the TV on the Blu-ray player (Panasonic DMP BDT330), every once in a while, the beginning of some menu items plays a snowy noise intermittent with some black frames for anywhere between 3 - 6 seconds. Playing back several times, this issue happens at the beginning of different menu items (and mainly when playing a playlist with the same items).
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the beginning of some menu items plays a snowy noise intermittent with some black frames for anywhere between 3 - 6 seconds. Playing back several times, this issue happens at the beginning of different menu items (and mainly when playing a playlist with the same items).
What does menu items mean? I assume that it is menus themselves, not timeline movies?
What could Encore do that would create this? I don't know, but assume that it is more likely to do with disk seek problems and the like. And yes, where things are put physically on the disk can be an issue. But burn/disk issues are more likely.
Have you tried this on a different player?

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AVCHD to Blu-Ray H.264 with minimum/no recompression? Possible?

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