Changes between Version 63 and Version 64 of Encode/HighQualityAudio

Timestamp:

Oct 6, 2024, 6:23:19 AM (20 months ago)

Author:

Mingye Wang

Comment:

then transparency

Encode/HighQualityAudio

@@ -89 +89 @@
 == Recommended minimum bitrates to use ==
 
-The bitrates listed here assume 2-channel stereo and a sample rate of 44.1kHz or 48kHz. Mono, speech, and quiet audio may require fewer bits.[[BR]]
-- '''libopus''' – usable range ≥ 32Kbps. Recommended range ≥ 64Kbps[[BR]]
-- '''libfdk_aac default AAC LC profile''' – recommended range ≥ 128Kbps; see [[Encode/AAC|AAC Encoding Guide]]. [[BR]]
-- '''libfdk_aac -profile:a aac_he_v2''' – usable range ≤ 48Kbps CBR. Transparency: Does not reach transparency. Use AAC LC instead to achieve transparency[[BR]]
-- '''libfdk_aac -profile:a aac_he''' – usable range ≥ 48Kbps and ≤ 80Kbps CBR. Transparency: Does not reach transparency. Use AAC LC instead to achieve transparency[[BR]]
-- '''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]]
+The bitrates listed here assume 2-channel stereo and a sample rate of 44.1kHz or 48kHz. Mono, speech, and quiet audio may require fewer bits.
+
+- '''libopus''' – usable range ≥ 32Kbps. Recommended range ≥ 64Kbps.[[BR]]Transparency: very close at default (96 Kbps), but takes more (160+) to be real transparent.
+- '''libfdk_aac default AAC LC profile''' – recommended range ≥ 128Kbps; see [[Encode/AAC|AAC Encoding Guide]].
+- '''libfdk_aac -profile:a aac_he_v2''' – usable range ≤ 48Kbps CBR.[[BR]]Transparency: Does not reach transparency. Use AAC LC instead to achieve transparency
+- '''libfdk_aac -profile:a aac_he''' – usable range ≥ 48Kbps and ≤ 80Kbps CBR.[[BR]]Transparency: Does not reach transparency. Use AAC LC instead to achieve transparency
+- '''libvorbis''' – usable range ≥ 96Kbps. Recommended range `-aq 4` (≥ 128Kbps). Neither high quality nor widely supported, avoid.
+- '''libmp3lame''' – usable range ≥ 128Kbps. Recommended range `-aq 2` (≥ 192Kbps)
+- '''ac3 or eac3''' – usable range ≥ 160Kbps. Recommended range ≥ 160Kbps
  Example of usage:
 {{{
 ffmpeg -i input.wav -c:a ac3 -b:a 160k output.m4a
 }}}
-- '''aac''' – usable range ≥ 32Kbps (depending on profile and audio). Recommended range ≥ 128Kbps[[BR]]
- Example of usage:
+- '''aac''' – usable range ≥ 32Kbps (depending on profile and audio). Recommended range ≥ 128Kbps[[BR]]Example of usage:
 {{{
 ffmpeg -i input.wav -c:a aac -b:a 128k output.m4a