From 5ecc763f6dd9f9cc447d3933c5c75b56c41a46e4 Mon Sep 17 00:00:00 2001 From: Andrew Weaver Date: Wed, 16 Nov 2016 15:36:41 -0500 Subject: [PATCH] change WAV->MP3 to constant quality --- index.html | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/index.html b/index.html index b2a6787..d347945 100644 --- a/index.html +++ b/index.html @@ -46,7 +46,7 @@

WAV to MP3

-

ffmpeg -i input_file.wav -write_id3v1 1 -id3v2_version 3 -dither_method modified_e_weighted -out_sample_rate 48k -b:a 320k output_file.mp3

+

ffmpeg -i input_file.wav -write_id3v1 1 -id3v2_version 3 -dither_method modified_e_weighted -out_sample_rate 48k -qscale:a 1 output_file.mp3

This will convert your WAV files to MP3s.

ffmpeg
starts the command
@@ -55,7 +55,7 @@
-id3v2_version 3
Write ID3v2 tag. This will add metadata to a newer MP3 format, assuming you’ve embedded metadata into the WAV file.
-dither_method modified_e_weighted
Dither makes sure you don’t unnecessarily truncate the dynamic range of your audio.
-out_sample_rate 48k
Sets the audio sampling frequency to 48 kHz. This can be omitted to use the same sampling frequency as the input.
-
-b:a 320k
This sets the bit rate at the highest rate the MP3 format allows. Reduce this to 160k for mono files.
+
-qscale:a 1
This sets the encoder to use a constant quality with a variable bitrate of between 190-250kbit/s. If you would prefer to use a constant bitrate, this could be replaced with -b:a 320k to set to the maximum bitrate allowed by the MP3 format. For more detailed discussion on variable vs constant bitrates see here.
output_file
path and name of the output file