Changes between Version 50 and Version 51 of Encode/HighQualityAudio

Timestamp:

Aug 11, 2016, 10:11:15 PM (10 years ago)

Author:

mjbrown

Comment:

consistent use of 'range' and 'Kbps' (not sure what's really preferred), and 'FFmpeg'. moved VBR note to end

Encode/HighQualityAudio

@@ -48 +48 @@
 }}}
 {{{#!comment
-I think we should do a listening test between libfaac and eac3/ac3, because from my experience libfaac can't really handle 128kbps or 160kbps as well as ac3
+I think we should do a listening test between libfaac and eac3/ac3, because from my experience libfaac can't really handle 128Kbps or 160Kbps as well as ac3
 libopus >= libvorbis >= aac >= libfdk_aac > libmp3lame > eac3/ac3 >= libfaac > libtwolame > mp2 > vorbis > wmav2/wmav1
 Both libfaac and ac3 have annoying sounds at 128Kbps. It probably depends on what one prefers, but ac3 is definitely better than libtwolame at 128Kbps. libtwolame completely breaks down at that rate.
@@ -104 +104 @@
 - '''libvorbis''' Usable range >= 96Kbps. Recommended range '''-aq 4 (>= 128Kbps)'''[[BR]]
 - '''libmp3lame''' Usable range >= 128Kbps. Recommended range '''-aq 2 (>= 192Kbps)'''[[BR]]
-- '''ac3 or eac3''' Usable range >= 160kbps. Recommended range '''>= 160Kbps'''[[BR]]
-- '''libfaac''' Usable range >= 160kbps. Recommended range '''-q:a 330 -cutoff 15000 (>= 192Kbps)'''.[[BR]]
+- '''ac3 or eac3''' Usable range >= 160Kbps. Recommended range '''>= 160Kbps'''[[BR]]
+- '''libfaac''' Usable range >= 160Kbps. Recommended range '''-q:a 330 -cutoff 15000 (>= 192Kbps)'''.[[BR]]
  Example of usage:
 {{{
 ffmpeg -i input.wav -c:a libfaac -q:a 330 -cutoff 15000 output.m4a
 }}}
-- '''aac''' Usable range >= 32kbps (depending on profile and audio). Recommended rate '''>= 128Kbps'''[[BR]]
+- '''aac''' Usable range >= 32Kbps (depending on profile and audio). Recommended range '''>= 128Kbps'''[[BR]]
  Example of usage:
 {{{
 ffmpeg -i input.wav output.m4a
 }}}
-- '''libtwolame''' Usable range >= 192kbps. Recommended range '''>= 256Kbps'''[[BR]]
-- '''mp2''' Usable range >= 320kbps. Recommended range '''>= 320Kbps'''[[BR]]
+- '''libtwolame''' Usable range >= 192Kbps. Recommended range '''>= 256Kbps'''[[BR]]
+- '''mp2''' Usable range >= 320Kbps. Recommended range '''>= 320Kbps'''[[BR]]
 
 The '''vorbis''' and '''wmav1/wmav2''' encoders are not worth using.[[BR]]
 The '''wmav1/wmav2''' encoder '''does not reach transparency at any bitrate'''.[[BR]]
-The '''vorbis''' encoder does not use the bitrate specified in ffmpeg. On some samples it does sound reasonable, but the bitrate is very high.[[BR]][[BR]]
+The '''vorbis''' encoder does not use the bitrate specified in FFmpeg. On some samples it does sound reasonable, but the bitrate is very high.[[BR]][[BR]]
 To calculate the bitrate to use for multi-channel audio: (bitrate for stereo) x (channels / 2).[[BR]]
 Example for 5.1(6 channels) Vorbis audio: 128Kbps x (6 / 2) = 384Kbps[[BR]]
 ----
 
-Some codecs have a more efficient variable bitrate (VBR) mode which optimizes to a given, constant quality level rather than having variable quality at a given, constant bitrate (CBR). The info above is for CBR. VBR is more efficent than CBR but may not be as hardware-compatible.[[BR]]
 When compatibility with hardware players doesn't matter then use `libvorbis` in a MKV container rather than `libfaac` when `libfdk_aac` isn't available.[[BR]]
 When compatibility with hardware players does matter then use libmp3lame or ac3 in a MP4/MKV container rather than `libfaac` when `libfdk_aac` isn't available.[[BR]]
 Transparency means the encoded audio sounds indistinguishable from the audio in the source file.[[BR]]
+Some codecs have a more efficient variable bitrate (VBR) mode which optimizes to a given, constant quality level rather than having variable quality at a given, constant bitrate (CBR). The info above is for CBR. VBR is more efficent than CBR but may not be as hardware-compatible.[[BR]]
 [[BR]]
+