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Question - Prevent reencoding when creating BRMV No.66506
LiveRock  Mail / Home )  2012-08-10 11:45:45 ( ID:r//utnrtoxa )  


I am trying to create source files (.h264, mp4, etc) that Authoring Works 5 can use in a project to create a BDMV (Blu-way) disc.

However, I tried, Works 5 always try to reencode my source videos.
My source videos are

25 fps

The reencoding takes a lot of time; between 1-2 hours. If I add the Blu-ray writing, it is even more!

Is there a way to create source video files that avoid reencoing?

Thanks in advanced for any insights..

tkrave  2012-08-11 02:16:00 ( ID:esk4fdefcg2 )  

There may be other settings you need to change in order to conform to Blu-ray standards. Post the full details of your source file if you can; you can use a program called MediaInfo to get a detailed report.

LivrRock  Mail /  )  2012-08-12 18:09:29 ( ID:r//utnrtoxa )  

Here are the info, hope someone would tell me what's wrong:

Complete name : O:\JEC2012\tests\Conference Wind.264
Format : AVC
Format/Info : Advanced Video Codec
File size : 147 MiB
Overall bit rate mode : Variable

Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Format settings, GOP : M=4, N=24
Bit rate mode : Variable
Maximum bit rate : 18.0 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
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Maggi  2012-08-22 00:17:49 ( ID:pzgifoyf6pk )  

I'm running into the same problem here ...

I generated BluRay compliant TS streams with x264 and want to author those using TAW5, but no matter what settings I try, it always reencodes the whole programm.

So far, I tested the following options:
- "prevent this track from the target size adjustment"
- "output setting" -> automatic (smart rendering prioritized)

Am I missing some ther options here ?

However, using tsMuxeR for outputting those file as BD works just fine and every player I tried accepts those disks, but obviously, tsMuxeR has no option for authoring at all.

Stream details are as follows:

ID : 1 (0x1)
Complete name : Heimat_1.ts
Format : MPEG-TS
File size : 11.8 GiB
Duration : 46mn 1s
Overall bit rate mode : Variable
Overall bit rate : 36.6 Mbps
Maximum Overall bit rate : 35.5 Mbps

ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : 27
Duration : 46mn 2s
Bit rate mode : Variable
Bit rate : 35.8 Mbps
Maximum bit rate : 40.0 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 : Progressive
Bits/(Pixel*Frame) : 0.691
Stream size : 11.0 GiB (94%)
Writing library : x264 core 116 r2057 0ba8a9c
Encoding settings : cabac=1 / ref=1 / deblock=1:-1:-1 / analyse=0x3:0x113 / me=umh / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / slices=4 / nr=0 / decimate=1 / interlaced=fake / bluray_compat=1 / constrained_intra=0 / bframes=3 / b_pyramid=1 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=0 / keyint=100 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=abr / mbtree=1 / bitrate=35840 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=40000 / vbv_bufsize=30000 / nal_hrd=vbr / ip_ratio=1.40 / aq=1:1.00

ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : 129
Duration : 45mn 31s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : 16ms
Stream size : 146 MiB (1%)
Language : German


IMHO, this issue needs to get resolved asap


Maggi  2012-09-04 23:31:31 ( ID:pzgifoyf6pk )  

I would surely appreciate any kind of feedback on this matter ...

On a side note, I noticed the transcoding process causes the videolevels to be ajusted from full to legal levels and that's a major show stopper, since I'm usually working with video legal levels in my clips already.


tkrave  2012-09-05 05:53:30 ( ID:esk4fdefcg2 )  

Probably a bug related to PAL/25fps Blu-ray files.

I would contact support and give them the video info.

Maggi  2012-09-05 19:02:20 ( ID:pzgifoyf6pk )  

Thanx, tkrave !

I just filed a bugreport.

I thought this BBS would be monitored and assisted by tech support, but now it seems, this is just user based.

Anyways, if I get this issue resolved, I'll drop a note.


Maggi  2012-09-10 16:39:09 ( ID:pzgifoyf6pk )  

Just a little update:

I'm in talks with tech support, but didn't get too much technical details about mandatory requirements for a given h264 stream to avoid re-encoding.

BUT, I did some more research a found a working x264 encoder setting for 1080p25 footage, that does not get re-encoded by TAW at all:

x264.exe --no-progress --preset slow --tune film --nal-hrd vbr --weightp 2 --b-pyramid strict --bluray-compat --level 41 --keyint 25 --min-keyint 25 --aud --non-deterministic --slices 4 --bframes 2 --ref 1 --psy-rd 1:0 --fake-interlaced --bitrate 16000 --qcomp 0.6 --sar 1:1 --threads 0 --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --bframes 2 --vbv-maxrate 40000 --vbv-bufsize 30000 --b-pyramid strict --demuxer raw --input-res 1920x1080 --fps 25 --input-csp i420 -o output.264 input.file

Feel free to take these settings as a starting point for adopting it to your footage's specs ... :)

Best regards,

tkrave  2012-09-11 07:15:22 ( ID:esk4fdefcg2 )  

Nice! Thanks for those specs. It was probably some minute setting that was throwing things off, though it could just be a bug too. The official Blu-ray whitepaper doesn't go into enough detail to help.

I think Pegasys does monitor this forum but they won't respond, so I recommend that people contact support if they want a response or if they want to make sure a request/bug is seen.

Maggi  2012-09-17 19:54:18 ( ID:pzgifoyf6pk )  

Thanx for the link, tkrave !

In the PDF you linked, is a note about the needed format on page 33:

6.2.1 Video stream
Video streams for Blu-ray 3D shall be MPEG-4 MVC video format (Annex H of ITU-T H.264 | ISO/IEC 14496-10) compliant.

I dug a little deeper and found the following ITU paper that they are referring to:

"Annex H" starts on page 604 ... ^^

But to make it short, that book is total overkill to read, so I'll keep it pragmatical and take the trail and error approach.

Right now, I'm trying to encode a 23.976p stream that's supposed to not get reencoded and I'll post the setting, once I'll find them to be compatible with TAW.


Rick0725  2012-09-19 11:29:05 ( ID:abhw2jbwy1g )  

x264.exe --no-progress --preset slow --tune film --nal-hrd vbr --weightp 2 --b-pyramid strict --bluray-compat --level 41 --keyint 25 --min-keyint 25 --aud --non-deterministic --slices 4 --bframes 2 --ref 1 --psy-rd 1:0 --fake-interlaced --bitrate 16000 --qcomp 0.6 --sar 1:1 --threads 0 --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --bframes 2 --vbv-maxrate 40000 --vbv-bufsize 30000 --b-pyramid strict --demuxer raw --input-res 1920x1080 --fps 25 --input-csp i420 -o output.264 input.file

where do you enter these settings. I am having the same problem with .264 files.

Maggi  2012-09-20 20:26:53 ( ID:pzgifoyf6pk )  

that depends on what software you are using ... my example is for the cmd-line version of x264.exe, but I'd think that every GUI frontend for x264 has an option for entering those parameters as well

so, what are you using ?


tkrave  2012-09-21 02:57:38 ( ID:esk4fdefcg2 )  

If you're using TVMW5, you need to select "MPEG file output" to access the advanced h.264 settings. It's a bit difficult to figure out which settings match those parameters though.

Rick0725  2012-09-26 11:33:55 ( ID:abhw2jbwy1g )  

I tried all possible settings MP4, M2TS, and TS in the HDPVR and NONE of the files smart rendered in Authoring Works 5. A TS file created a few years ago from the HDPVR did smart render though.

the difference in the video properties were

The 720p/59.94 TS file from a few years ago that smart rendors shows ...nonmbaff.

I noticed thata TS file buff=4, ref=4,nonmbaff smart rendors but buff=2, ref=2, nonmbaff does not smart rendor

The TS 1080i/60 file that does not smart rendors shows both...mbaff, nonmbaff

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