Re: afconvert creating files that will not play
Re: afconvert creating files that will not play
- Subject: Re: afconvert creating files that will not play
- From: William Stewart <email@hidden>
- Date: Thu, 24 Jan 2008 18:45:37 -0800
I can reproduce this problem (QT thinks its a bad file) by using Tink:
% afconvert -f adts -v /System/Library/Sounds/Tink.aiff /tmp/out.aac
...
% afinfo /tmp/out.aac
File: /tmp/out.aac
File type ID: adts
Data format: 2 ch, 22050 Hz, 'aac ' (0x00000000) 0 bits/channel,
0 bytes/packet, 1024 frames/packet, 0 bytes/frame
Channel layout: Stereo (L R)
estimated duration: 0.139 sec
audio bytes: 351
audio packets: 3
bit rate: 20155 bits per second
packet size upper bound: 231
audio data file offset: 0
optimized
format list:
[ 0] format: 2 ch, 22050 Hz, 'aac ' (0x00000000) 0 bits/channel,
0 bytes/packet, 1024 frames/packet, 0 bytes/frame
Channel layout: Stereo (L R)
----
and using afplay, I can play it:
% afplay /tmp/out.aac
So, I think this is a bug in QT (as the file is fine). Can you verify
the above steps with your file and then file a bug report (http://bugreporter.apple.com
)
Thanks
Bill
On Jan 24, 2008, at 11:20 AM, David Brennan wrote:
Hi,
I am using the sample app afconvert to convert aiff to AAC. It seems
to work for large files, but when I try it on small files, the result
will not play.
Here is how I call afconvert
afconvert -f adts -v /Users/david/Desktop/small.aiff
/Users/david/Desktop/small.aac
This is it's output
Input file: small.aiff, 18297 frames
Formats:
Input file 1 ch, 22050 Hz, 'lpcm' (0x0000000E) 16-bit
big-endian signed integer
Output file 1 ch, 22050 Hz, 'aac ' (0x00000000) 0 bits/channel,
0 bytes/packet, 1024 frames/packet, 0 bytes/frame
Mono
Output client 1 ch, 22050 Hz, 'lpcm' (0x0000000E) 16-bit
big-endian signed integer
AudioConverter 0x810a34 [0x124420]:
PCMConverter 0x128640
Input: 1 ch, 22050 Hz, 'lpcm' (0x0000000E) 16-bit big-endian
signed integer
Output: 1 ch, 22050 Hz, 'lpcm' (0x0000000C) 16-bit
little-endian signed integer
CodecConverter 0x1286c0
Input: 1 ch, 22050 Hz, 'lpcm' (0x0000000C) 16-bit
little-endian signed integer
Output: 1 ch, 22050 Hz, 'aac ' (0x00000000) 0 bits/channel, 0
bytes/packet, 1024 frames/packet, 0 bytes/frame
Input layout tag: 640001
Output layout tag: 640001
Output file: small.aac, 20480 frames
And when I try to play the file with QuickTime Player I get an error
message saying:
The movie could not be opened.
The file is not a movie file.
What am I doing wrong?
Kind regards,
Dave.
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