5.1 wav file - No sound

King_Diamond · 10th July 2005, 20:50

I am trying to export a nearly 2hr 5.1 wav file through premiere pro. When I try to play the exported file, after just over 1hr, there is no sound! The file is just over 3.5Gb. I have XP with NTFS so the 2Gb limit should not be a problem. Any ideas what it can be?

Another thing, is it possible to do 5.1 avi file? If yes, how is the outcome? Is Microsoft DV Codec a good choice? Can anyone guess whether I would have the same problem as with the 5.1 wav file?

Any help would be much appreciated.

King_Diamond · 11th July 2005, 07:30

Any ideas please?

tebasuna51 · 11th July 2005, 20:01

Please put the exact time (nearly 2 hr, over 1 hr.) and size (over 3.5 Gb). Also must know if the 6 channel wav is 16 bit or 32, and the samplerate (44.1, 48 KHz).

5.1 avi? -> avi with audio ac3 5.1

DV Codec? -> 4 Gb/18 min.

King_Diamond · 12th July 2005, 06:39

Time is 1hr 52mins and size 3.7Gb, 6 channel wav 16bit and sample rate 48KHz.

Quote:

5.1 avi? -> avi with audio ac3 5.1

DV Codec? -> 4 Gb/18 min.

What do you mean?

tebasuna51 · 12th July 2005, 09:10

The 3.7 GB can be a correct size for a wav 6 chan 16 bit 48 KHz 112 min.

The limit 2 GB (62 min 8 sec for this wav) is not only a NTFS question. In the canonical wav header there are two fields of 4 bytes to put the file length and the data length, the max number in this four bytes (unsigned integer) is 4 GB, but if the soft read this 4 bytes like signed integer the max is 2 GB.

You can open the wav in a hex editor (WinHex) and check if the file length is correct (offset 4, value 3.7 G), check the data length (after the word "data") and check if there are really data in the second half of the file.

Or, you can demux this wav_6 in 6 mono wav with Tranzcode and play the FL channel.

Others questions:

DV is the codec used in videocam, good quality but big size, typically 4 GB for 18 min. I suggest you a Mpeg4 codec: X.264, Xvid or DivX.

If you want to play the video in a standalone player (DivX compliant) use: container avi, video Xvid, audio ac3 5.1

If you want to play the video in a computer use: container mkv, video X.264, audio aac 5.1

King_Diamond · 12th July 2005, 16:56

I splitted the file into two. I exported the first hour and then the second hour. I created a new sequence and joined them into premiere. Perfect. I believe that your explanation of the 2Gb limit is not just an NTFS question, was the reason.

In your post you said ".......but if the soft read this 4 bytes like signed integer the max is 2 GB." Can you explain what you mean with "soft read"? Would like to understand what happened.

tebasuna51 · 13th July 2005, 02:19

In a program you can define a variable x like unsigned integer (4 bytes) and this variable can take values from 0 to 4294967296 (4 GB).

If other variable y is defined like signed integer (also 4 bytes) can take values from -2147483648 to +2147483647 (2 GB).

If a old, or bad designed, routine use a signed integer variable for the file or data length can crash at limit of 2 GB.

10th July 2005, 20:50	#1 \| Link
King_Diamond Registered User Join Date: Aug 2004 Posts: 173	5.1 wav file - No sound I am trying to export a nearly 2hr 5.1 wav file through premiere pro. When I try to play the exported file, after just over 1hr, there is no sound! The file is just over 3.5Gb. I have XP with NTFS so the 2Gb limit should not be a problem. Any ideas what it can be? Another thing, is it possible to do 5.1 avi file? If yes, how is the outcome? Is Microsoft DV Codec a good choice? Can anyone guess whether I would have the same problem as with the 5.1 wav file? Any help would be much appreciated.

11th July 2005, 07:30	#2 \| Link
King_Diamond Registered User Join Date: Aug 2004 Posts: 173	Any ideas please?

11th July 2005, 20:01	#3 \| Link
tebasuna51 Moderator Join Date: Feb 2005 Location: Spain Posts: 7,471	Please put the exact time (nearly 2 hr, over 1 hr.) and size (over 3.5 Gb). Also must know if the 6 channel wav is 16 bit or 32, and the samplerate (44.1, 48 KHz). 5.1 avi? -> avi with audio ac3 5.1 DV Codec? -> 4 Gb/18 min.

12th July 2005, 09:10	#5 \| Link
tebasuna51 Moderator Join Date: Feb 2005 Location: Spain Posts: 7,471	The 3.7 GB can be a correct size for a wav 6 chan 16 bit 48 KHz 112 min. The limit 2 GB (62 min 8 sec for this wav) is not only a NTFS question. In the canonical wav header there are two fields of 4 bytes to put the file length and the data length, the max number in this four bytes (unsigned integer) is 4 GB, but if the soft read this 4 bytes like signed integer the max is 2 GB. You can open the wav in a hex editor (WinHex) and check if the file length is correct (offset 4, value 3.7 G), check the data length (after the word "data") and check if there are really data in the second half of the file. Or, you can demux this wav_6 in 6 mono wav with Tranzcode and play the FL channel. Others questions: DV is the codec used in videocam, good quality but big size, typically 4 GB for 18 min. I suggest you a Mpeg4 codec: X.264, Xvid or DivX. If you want to play the video in a standalone player (DivX compliant) use: container avi, video Xvid, audio ac3 5.1 If you want to play the video in a computer use: container mkv, video X.264, audio aac 5.1

12th July 2005, 16:56	#6 \| Link
King_Diamond Registered User Join Date: Aug 2004 Posts: 173	I splitted the file into two. I exported the first hour and then the second hour. I created a new sequence and joined them into premiere. Perfect. I believe that your explanation of the 2Gb limit is not just an NTFS question, was the reason. In your post you said ".......but if the soft read this 4 bytes like signed integer the max is 2 GB." Can you explain what you mean with "soft read"? Would like to understand what happened.

13th July 2005, 02:19	#7 \| Link
tebasuna51 Moderator Join Date: Feb 2005 Location: Spain Posts: 7,471	In a program you can define a variable x like unsigned integer (4 bytes) and this variable can take values from 0 to 4294967296 (4 GB). If other variable y is defined like signed integer (also 4 bytes) can take values from -2147483648 to +2147483647 (2 GB). If a old, or bad designed, routine use a signed integer variable for the file or data length can crash at limit of 2 GB.