Nero REcode (v7) - ATSC TS -> Mp4 audio 1 second delay...

sjchmura · 15th June 2006, 13:05

This is really weird. Never seen this with Nero before.

I have some transport streams (1080i). When I convert to AVC/5.1 AAC-HE the audio is 1 or 2 seconds behind. The streams playback perfectly.

Any suggestions?

Sharktooth · 15th June 2006, 13:47

Not enough CPU power to play back the AVC encode?

sjchmura · 15th June 2006, 16:51

Nope,

PureVideo v192, 7800GTX (overclocked 10%) , AMD X2 4800 (overclocked to 5000 or so).

This is really weird. Latest, registered version of Recode 7.2083. I have not tried to "downgrade".

Also the video and - while delayed - audio looks great and smooth no slowdowns. Using about 19% CPU.

All other 1080p clips play fine.

Should I try to force "deinterlaced" maybe?????

Sharktooth: I am at wits end (off topic) getting MeGUI AAC-HE to work. Do I need to "force" Directshow decoding to get 5.1 AAC using the ND drop down? I upgraded everything - even to your latest 524 build of x264

Daodan · 15th June 2006, 17:36

Than add a delay. If you recode the ac3 to something else (or using another tool, like Belight), the problem is still there?

sjchmura · 15th June 2006, 19:06

THere is no way to "add a delay" in recode. It was actually one of Nero's strengths - the fact it just plain worked. This is borked. I have tried 3 streams at 1080i. 720p is FINE.

It is seeing the 1080i ar 29.997 FPS - which is correct. Totally confused

bond · 15th June 2006, 19:26

those ts captures generally dont start at keyframes, so nero most likely encodes the video stream from the first keyframe (so not beginning at the filestart) and the audio right from the start -> desync

cut the ts so that the video stream starts with a keyframe

sjchmura · 15th June 2006, 19:53

Can I do this with HDTV2MPEG? What do you suggst to ensure a b-frame cut?

sjchmura · 16th June 2006, 20:16

1-pass encoding is NOT out of sync - but 2 pass is. I will keep experimenting

mediator · 17th June 2006, 15:48

sjchmura, please binary cut out a few seconds of the beginning of the problematic ts and provide that for reproduction. Thanks.

15th June 2006, 13:05	#1 \| Link
sjchmura Registered User Join Date: Sep 2002 Posts: 352	Nero REcode (v7) - ATSC TS -> Mp4 audio 1 second delay... This is really weird. Never seen this with Nero before. I have some transport streams (1080i). When I convert to AVC/5.1 AAC-HE the audio is 1 or 2 seconds behind. The streams playback perfectly. Any suggestions?

15th June 2006, 13:47	#2 \| Link
Sharktooth Mr. Sandman Join Date: Sep 2003 Location: Haddonfield, IL Posts: 11,768	Not enough CPU power to play back the AVC encode? __________________ MPEG-4 ASP Custom Matrices: EQM V1(old), EQM AutoGK Sharpmatrix (aka EQM V2), EQM V3HR (updated 01/10/2004), EQM V3LR, EQM V3ULR (updated 04/02/2005), EQM V3UHR (updated 17/12/2004) and EQM V3EHR (updated 05/10/2004) Info about my ASP matrices. MPEG-4 AVC Custom Matrices: EQM AVC-HR Info about my AVC matrices My x264 builds. Mooo!!!

15th June 2006, 17:36	#4 \| Link
Daodan unrecognized user Join Date: Oct 2005 Location: home of Stella Artois Posts: 303	Than add a delay. If you recode the ac3 to something else (or using another tool, like Belight), the problem is still there? __________________ zzz

15th June 2006, 19:26	#6 \| Link
bond Registered User Join Date: Nov 2001 Posts: 9,770	those ts captures generally dont start at keyframes, so nero most likely encodes the video stream from the first keyframe (so not beginning at the filestart) and the audio right from the start -> desync cut the ts so that the video stream starts with a keyframe __________________ Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ \| AVC/H.264 FAQ \| AAC FAQ \| MP4 FAQ \| MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora \| Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free

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15th June 2006, 16:51	#3 \| Link
sjchmura Registered User Join Date: Sep 2002 Posts: 352	Nope, PureVideo v192, 7800GTX (overclocked 10%) , AMD X2 4800 (overclocked to 5000 or so). This is really weird. Latest, registered version of Recode 7.2083. I have not tried to "downgrade". Also the video and - while delayed - audio looks great and smooth no slowdowns. Using about 19% CPU. All other 1080p clips play fine. Should I try to force "deinterlaced" maybe????? Sharktooth: I am at wits end (off topic) getting MeGUI AAC-HE to work. Do I need to "force" Directshow decoding to get 5.1 AAC using the ND drop down? I upgraded everything - even to your latest 524 build of x264

15th June 2006, 19:06	#5 \| Link
sjchmura Registered User Join Date: Sep 2002 Posts: 352	THere is no way to "add a delay" in recode. It was actually one of Nero's strengths - the fact it just plain worked. This is borked. I have tried 3 streams at 1080i. 720p is FINE. It is seeing the 1080i ar 29.997 FPS - which is correct. Totally confused

15th June 2006, 19:53	#7 \| Link
sjchmura Registered User Join Date: Sep 2002 Posts: 352	Can I do this with HDTV2MPEG? What do you suggst to ensure a b-frame cut?

16th June 2006, 20:16	#8 \| Link
sjchmura Registered User Join Date: Sep 2002 Posts: 352	1-pass encoding is NOT out of sync - but 2 pass is. I will keep experimenting

17th June 2006, 15:48	#9 \| Link
mediator Registered User Join Date: Aug 2004 Posts: 133	sjchmura, please binary cut out a few seconds of the beginning of the problematic ts and provide that for reproduction. Thanks.