Damaged ac3-file: delay after correction by Besplit?

janus1 · 19th February 2003, 02:59

Hello!

I need help with the following problem:

1. I have an ac3-file with the negative audio delay of -80.
So I tried to use ac3 delay corrector 1.8, but it reports that the stream is damaged.

2. I read that Besplit can correct that AND compensate for the delay, so I used the tool (also see log-file attached):

BeSplit -core( -input D:\DVD\PROJEKT\AUDIO\Deutsch.ac3 -prefix D:\DVD\PROJEKT\AUDIO\Deutsch-neu.ac3 -logfile BeSplit.txt -type ac3 -ending ) -split( 0.080 )

Ok, now the stream has been repaired (besplit reported some sync errors). And I have noticed that the ac3-file resulting from besplit is indeed slightly smaller.

BUT NOW THE QUESTION: What delay has the ac3-file after having been corrected and compensated for the delay by Besplit? Is it "0"?

Thanks in Advance.

JANUS

PS: Somedbody told me that an ac3-file has 32 ms per frame, so the delay should be either -16 or +16... is this correct?

DSPguru · 19th February 2003, 21:16

janus1 · 20th February 2003, 09:56

Hello DSPGuru,

The logifle is attached in my first post (besplit.txt). Or have I made a mistake attaching the file? I'll attach the file again, just to be on the safe side.

Thanks in advance.

Regards,

JANUS

DSPguru · 22nd February 2003, 14:07

Quote:

[00:06:28:064] Stream error : Sync found after 280 bytes
[00:06:44:544] Stream error : Sync found after 1248 bytes
[00:10:20:160] Stream error : Sync found after 1331 bytes
[00:13:33:600] Stream error : Sync found after 195 bytes
[00:37:31:168] Stream error : Sync found after 186 bytes
[00:37:47:392] Stream error : Sync found after 1343 bytes

i see three "big" errors in the file (1248,1331,1343), so i guess you lost something like 2 to 4 frames, which is like negative delay of 64ms to 128ms.

cult · 22nd February 2003, 14:31

1,8 ver?where did you find it?

19th February 2003, 02:59	#1 \| Link
janus1 Registered User Join Date: Feb 2003 Posts: 6	Damaged ac3-file: delay after correction by Besplit? Hello! I need help with the following problem: 1. I have an ac3-file with the negative audio delay of -80. So I tried to use ac3 delay corrector 1.8, but it reports that the stream is damaged. 2. I read that Besplit can correct that AND compensate for the delay, so I used the tool (also see log-file attached): BeSplit -core( -input D:\DVD\PROJEKT\AUDIO\Deutsch.ac3 -prefix D:\DVD\PROJEKT\AUDIO\Deutsch-neu.ac3 -logfile BeSplit.txt -type ac3 -ending ) -split( 0.080 ) Ok, now the stream has been repaired (besplit reported some sync errors). And I have noticed that the ac3-file resulting from besplit is indeed slightly smaller. BUT NOW THE QUESTION: What delay has the ac3-file after having been corrected and compensated for the delay by Besplit? Is it "0"? Thanks in Advance. JANUS PS: Somedbody told me that an ac3-file has 32 ms per frame, so the delay should be either -16 or +16... is this correct?

19th February 2003, 21:16	#2 \| Link
DSPguru BeSweet Author Join Date: Oct 2001 Location: On top of a supercompact cardinal Posts: 3,506	__________________ FAQs : BeSweet, Audio :readfaq: Homepage : DSPguru's Webpage http://dspguru.notrace.dk/cs.gif Guides : Multilingual Guides of my tools http://dspguru.notrace.dk/1zhelp.gif

20th February 2003, 09:56	#3 \| Link
janus1 Registered User Join Date: Feb 2003 Posts: 6	Logfile is attached. Hello DSPGuru, The logifle is attached in my first post (besplit.txt). Or have I made a mistake attaching the file? I'll attach the file again, just to be on the safe side. Thanks in advance. Regards, JANUS

22nd February 2003, 14:31	#5 \| Link
cult Registered User Join Date: Nov 2001 Location: greece Posts: 383	1,8 ver?where did you find it?