diff --git a/index.html b/index.html index 7344226..d76897f 100644 --- a/index.html +++ b/index.html @@ -324,13 +324,14 @@
ffmpeg
starts the command
-i input_file
path and name of the input file
-
-write_id3v1 1
Write ID3v1 tag. This will add metadata to the old MP3 format, assuming you’ve embedded metadata into the WAV file.
-
-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.
+
-write_id3v1 1
Write ID3v1 tag. This will add metadata to the "older" MP3 metadata format that's found at the head of the file, assuming you’ve embedded metadata into the WAV file.
+
-id3v2_version 3
Write ID3v2 tag. This will add metadata to the "newer" MP3 metadata format that's found at the tail of the file, assuming you’ve embedded metadata into the WAV file.
+
-dither_method rectangular
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.
-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
+

A note about dither methods. FFMPEG comes with a variety of dither algorithms, outlined in the official docs, though some may lead to unintended, not-subtle digital clipping on some systems.

@@ -352,10 +353,11 @@
-i input_file
path and name of the input file
-c:a aac
sets the audio codec to AAC
-b:a 128k
sets the bitrate of the audio to 128k
-
-dither_method modified_e_weighted
Dither makes sure you don’t unnecessarily truncate the dynamic range of your audio.
+
-dither_method rectangular
Dither makes sure you don’t unnecessarily truncate the dynamic range of your audio.
-ar 44100
sets the audio sampling frequency to 44100 Hz, or 44.1 kHz, or “CD quality”
output_file
path and name of the output file
+

A note about dither methods. FFMPEG comes with a variety of dither algorithms, outlined in the official docs, though some may lead to unintended, not-subtle digital clipping on some systems.