Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > (HD) DVD, Blu-ray & (S)VCD > One click suites for DVD backup and DVD creation

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 1st November 2009, 23:10   #11  |  Link
MilesAhead
Registered User
 
MilesAhead's Avatar
 
Join Date: May 2005
Posts: 169
ac3 audio below minimum

I think I see what is happening. It looks like if you convert from another audio format, such as .mp3, it honors the minimum bitrate.

But it seems if the audio is already .ac3, even if the bitrate is below the minimum, it is just muxed in with no processing if
"preserve compliant ac3 audio" option is checked.

here's a log from the clip with .mp3 audio

==============================================
<11/1/2009 4:41:42 PM>
START PROCESS
<>

<11/1/2009 4:41:42 PM>
PROJECT SETTINGS

DVD Video Standard: NTSC
DVD Titles number: 1
DVD Size: 639/4450 MB (14%)
DVD Output Setup: DVD Folder
DVD Label: TestClip
DVD Menu: No Menu
Output Folder: C:\DVD\AVStoDVD_Out
Save Log file: Yes
Delete Temp Process Files: Yes
Delete Working Files: Yes
Edit Command Parameters: No
Post Process Task: Show Progress Status window

<>

<11/1/2009 4:41:42 PM>
TITLE 1 SOURCE FILES
Video: C:\DVD\TestClip.avi
Info: DivX 5 - 1014 kbps - 640x352 - DAR 1.818 - 23.976 fps - Progressive - 10:09 minutes - 14625 frames
Audio: C:\DVD\TestClip.avi
Info: MPEG-1 Audio layer 3 - 32 kbps - CBR - 48000Hz - 2ch - 10:10 minutes
Subs:
[MediaInfoLib - v0.7.23]
<>

<11/1/2009 4:41:42 PM>
AVISYNTH SCRIPT
Import("C:\Program Files (x86)\AVStoDVD\Lib\A2DSource.avsi")

Video = A2DVideoSource("C:\DVD\TestClip.avi", CacheFolder = "C:\Users\Owner\AppData\Local\Temp")
Audio = A2DAudioSource("C:\DVD\TestClip.avi", CacheFolder = "C:\Users\Owner\AppData\Local\Temp")

Video = Video.ConvertToYV12
#Using DGPulldown to upsize FPS
Video = Video.AddBorders(0,4,0,4)
Video = Video.Lanczos4Resize(720,480)

AudioDub(Video, Audio)
<>

<11/1/2009 4:41:42 PM>
START VIDEO ENCODING OPERATIONS
Encoding Profile: QuEnc CBR 1-pass
Target Video FileSize: 618.1 MB
QuEnc Parameters: -i "C:\Users\Owner\AppData\Local\Temp\TestClip_0_TestClip.avs" -o "C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.m2v" -b 8500 -1 -hq -novbr -scene -trell -aspectratio 16:9 -nointerlaced -mpeg2mux noaudio -dc 10 -priority 5 -auto -close
<>

<11/1/2009 4:46:44 PM>
END VIDEO ENCODING OPERATIONS
A2DVideoSource: AVISource
Created File: C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.m2v (618 MB)
OUTPUT VIDEO INFO: MPEG-2 Video - 8572 kbps - 720x480 - DAR 1.778 - 23.976 fps - Progressive - 10:09 minutes - 14610 frames
<>

<11/1/2009 4:46:44 PM>
START PULLDOWN OPERATIONS
DGPulldown Parameters: "C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.m2v" -srcfps 23.976 -destfps 29.97 -inplace -bff
<>

<11/1/2009 4:47:14 PM>
END PULLDOWN OPERATIONS
DGPulldown executed on File: C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.m2v (618 MB)
OUTPUT VIDEO INFO: MPEG-2 Video - 8565 kbps - 720x480 - DAR 1.778 - 23.976 fps - Progressive (2:3 Pulldown) - 10:09 minutes - 14622 frames
<>

<11/1/2009 4:47:14 PM>
START AUDIO ENCODING OPERATIONS
Wavi+Aften Parameters: "C:\Users\Owner\AppData\Local\Temp\TestClip_0_TestClip.avs" - | "C:\Program Files (x86)\AVStoDVD\Aften\aften.exe" -b 224 - "C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.ac3"
<>

<11/1/2009 4:47:35 PM>
END AUDIO ENCODING OPERATIONS
A2DAudioSource: DirectShowSource
Created File: C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.ac3 (16.3 MB)
OUTPUT AUDIO INFO: AC3 - 224 kbps - CBR - 48000Hz - 2ch - 10:10 minutes
<>

<11/1/2009 4:47:36 PM>
START DVD AUTHORING OPERATIONS
BatchMux Parameters: -arglist "C:\Users\Owner\AppData\Local\Temp\TestClip_0_BatchMux.ini"
BatchMux ini file:
-d "C:\DVD\AVStoDVD_Out\TestClip_0\VIDEO_TS"
-mxp "C:\Users\Owner\AppData\Local\Temp\TestClip_0_MuxMan.mxp"
-l "C:\Users\Owner\AppData\Local\Temp\TestClip_0_MuxMan.log"
-muxman "C:\Program Files (x86)\AVStoDVD\MuxMan"
-prio LOW
-v "C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.m2v"
-vidmode LB
-a1 "C:\DVD\AVStoDVD_Out\TestClip_0_TestClip.ac3"
-a1lang en
-cellfr "C:\Users\Owner\AppData\Local\Temp\TestClip_0_TestClip_MuxMan.txt"
-progfr "C:\Users\Owner\AppData\Local\Temp\TestClip_0_TestClip_MuxMan.txt"
-chapfr "C:\Users\Owner\AppData\Local\Temp\TestClip_0_TestClip_MuxMan.txt"

<>

<11/1/2009 4:47:42 PM>
END DVD AUTHORING OPERATIONS
Created Folder: C:\DVD\AVStoDVD_Out\TestClip_0 (643.4 MB)
<>

<11/1/2009 4:47:43 PM>
Log file created by AVStoDVD Release 2.2.3
<>


==============================================

The same clip but I used AviDemux to convert the audio to
ac3 192

==============================================
<11/1/2009 4:53:20 PM>
START PROCESS
<>

<11/1/2009 4:53:20 PM>
PROJECT SETTINGS

DVD Video Standard: NTSC
DVD Titles number: 1
DVD Size: 636/4450 MB (14%)
DVD Output Setup: DVD Folder
DVD Label: TestClip2
DVD Menu: No Menu
Output Folder: C:\DVD\AVStoDVD_Out
Save Log file: Yes
Delete Temp Process Files: Yes
Delete Working Files: Yes
Edit Command Parameters: No
Post Process Task: Show Progress Status window

<>

<11/1/2009 4:53:20 PM>
TITLE 1 SOURCE FILES
Video: C:\DVD\TestClip2.avi
Info: DivX 5 - 1014 kbps - 640x352 - DAR 1.818 - 23.976 fps - Progressive - 10:09 minutes - 14625 frames
Audio: C:\DVD\TestClip2.avi
Info: AC3 - 192 kbps - CBR - 48000Hz - 2ch - 10:09 minutes
Subs:
[MediaInfoLib - v0.7.23]
<>

<11/1/2009 4:53:20 PM>
AVISYNTH SCRIPT
Import("C:\Program Files (x86)\AVStoDVD\Lib\A2DSource.avsi")

Video = A2DVideoSource("C:\DVD\TestClip2.avi", CacheFolder = "C:\Users\Owner\AppData\Local\Temp")
# Audio is frameserved by AviSynth just for Preview and Edit purposes.
Audio = A2DAudioSource("C:\DVD\TestClip2.avi", CacheFolder = "C:\Users\Owner\AppData\Local\Temp")

Video = Video.ConvertToYV12
#Using DGPulldown to upsize FPS
Video = Video.AddBorders(0,4,0,4)
Video = Video.Lanczos4Resize(720,480)

AudioDub(Video, Audio)
<>

<11/1/2009 4:53:20 PM>
START VIDEO ENCODING OPERATIONS
Encoding Profile: QuEnc CBR 1-pass
Target Video FileSize: 618.1 MB
QuEnc Parameters: -i "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_TestClip2.avs" -o "C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.m2v" -b 8500 -1 -hq -novbr -scene -trell -aspectratio 16:9 -nointerlaced -mpeg2mux noaudio -dc 10 -priority 5 -auto -close
<>

<11/1/2009 4:58:24 PM>
END VIDEO ENCODING OPERATIONS
A2DVideoSource: AVISource
Created File: C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.m2v (618 MB)
OUTPUT VIDEO INFO: MPEG-2 Video - 8572 kbps - 720x480 - DAR 1.778 - 23.976 fps - Progressive - 10:09 minutes - 14610 frames
<>

<11/1/2009 4:58:24 PM>
START PULLDOWN OPERATIONS
DGPulldown Parameters: "C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.m2v" -srcfps 23.976 -destfps 29.97 -inplace -bff
<>

<11/1/2009 4:58:53 PM>
END PULLDOWN OPERATIONS
DGPulldown executed on File: C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.m2v (618 MB)
OUTPUT VIDEO INFO: MPEG-2 Video - 8565 kbps - 720x480 - DAR 1.778 - 23.976 fps - Progressive (2:3 Pulldown) - 10:09 minutes - 14622 frames
<>

<11/1/2009 4:58:53 PM>
START AUDIO DEMUXING OPERATIONS
FFmpeg Parameters: -i "C:\DVD\TestClip2.avi" -acodec copy "C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.ToFix.ac3"
<>

<11/1/2009 4:59:04 PM>
END AUDIO ENCODING OPERATIONS
Created File: C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.ac3 (14 MB)
OUTPUT AUDIO INFO: AC3 - 192 kbps - CBR - 48000Hz - 2ch - 10:09 minutes
<>

<11/1/2009 4:59:04 PM>
START DVD AUTHORING OPERATIONS
BatchMux Parameters: -arglist "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_BatchMux.ini"
BatchMux ini file:
-d "C:\DVD\AVStoDVD_Out\TestClip2_0\VIDEO_TS"
-mxp "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_MuxMan.mxp"
-l "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_MuxMan.log"
-muxman "C:\Program Files (x86)\AVStoDVD\MuxMan"
-prio LOW
-v "C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.m2v"
-vidmode LB
-a1 "C:\DVD\AVStoDVD_Out\TestClip2_0_TestClip2.ac3"
-a1lang en
-cellfr "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_TestClip2_MuxMan.txt"
-progfr "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_TestClip2_MuxMan.txt"
-chapfr "C:\Users\Owner\AppData\Local\Temp\TestClip2_0_TestClip2_MuxMan.txt"

<>

<11/1/2009 4:59:11 PM>
END DVD AUTHORING OPERATIONS
Created Folder: C:\DVD\AVStoDVD_Out\TestClip2_0 (641 MB)
<>

<11/1/2009 4:59:11 PM>
Log file created by AVStoDVD Release 2.2.3
<>


==============================================

I haven't done test runs yet with HC but maybe you can tell from this if the "preserve ac3" setting is supposed to keep the audio regardless of bitrate or it's supposed to process if below the minimum. I guess a case could be made for either setting.
__________________
"I don't want to belong to any club that would have me as a member."
- Groucho Marx
MilesAhead is offline   Reply With Quote
 

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 10:29.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.