Why lame can not convert 8 sample bit wave file?

Question

2.00/5 (1 vote)

See more:

hi all:

now, i am use Lame open source code to convert wave file into mp3 file, but, i meet a hard matter.

When sample bit of wave is 8, Lame can not convert it into mp3 succssfully, there are very big noise and no clear voice. Lame can convert 16 sample bit wave file.

Do you meet the same question? or my lame version is too low, my lame version is 1.91 likely.

Thanks!
BR,
Aaron

Posted 1-Apr-15 5:58am

Aaron Bo

Updated 1-Apr-15 6:00am

v2

Add a Solution

Comments

Jochen Arndt 1-Apr-15 12:48pm

Version 1.91?
Or did you mean 3.91?
Even that is from 2001. So you should try a newer version.
However, you should not expect getting a good result with 8 bit samples.
The result will always be inferior to the PCM source.

Albert Holguin 6-May-15 19:10pm

8bit PCM is pretty common... not the best but common nonetheless

2 solutions

Solution 2

Look at the user doc for lame[^]. Do a search for bitwidth and you'll find this:

Quote:
Input options for raw PCM:
-r read the input file as a raw (headerless) PCM stream
-s n input sampling frequency in kHz (Default 44.1Khz)
--signed input is signed (default)
--unsigned input is unsigned
--bitwidth w input bit width is w (default 16)
-x swap bytes of input file
--little-endian input is little-endian (default)
--big-endian input is big-endian
-a downmix stereo file to mono file for mono encoding.
Needed with RAW input for the -mm mode to do the downmix.

Possible that bitwidth is defaulting to 16 causing the data to be interpreted incorrectly... try setting that to 8.

Posted 6-May-15 13:06pm

Albert Holguin

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

webmaster442 · Accepted Answer · 2015-05-05T10:02:00

Solution 1

MP3 is not meant for that. Use 16 bit sample rate. A 128kbit mp3 just consumes 16KBytes/second. Alternatively, if you are looking for a real lo-fi sound just try mp3 with 64kbit setting.

Posted 5-May-15 10:02am

webmaster442