AAC (FDK) or AAC (LAV) in AVIDemux

[Alwyn]

A question for the audiophiles...

AVIDemux has two options for encoding the audio into AAC, FDK and LAV:


[Attachment 87879 - Click to enlarge]

I know even less about audio than I do video, so am interested in your thoughts about which would be preferred out of these two.

Thanks!

[gregalan]

According to listening tests FDK should be preferred over lav.
See here: https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio

The AAC (lav) is the ffmpeg native aac encoder and is not the best quality, although it is acceptable for non critical use.

[Alwyn]

Thanks @Gregalan, I'll check it out.

[cholla]

If I was using AVIDemux & the audio was a low bitrate I would use AAC(FDK).
Better yet demux the video/audio.
Then use ffmpeg with aac_at for the codec.(Apple)
Or use QAAC.
Then remux & open in AVIDemux & use Copy in Audio.

I did a comparison of ffmpeg Native & AVIDemux AAC(lav).
The codec appears to be the same.
FFMPEG Native
Mediainfo:
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 7 min 35 s
Source duration : 7 min 35 s
Bit rate mode : Variable
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 6.90 MiB (3%)
Source stream size : 6.90 MiB (3%)
Default : Yes
Alternate group : 1
Menus : 3

FFPROBE: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)

AVIDemux AAC(lav)
FFPROBE: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 126 kb/s (default)
Mediainfo:
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 7 min 35 s
Bit rate mode : Variable
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 6.90 MiB (3%)
Default : Yes
Alternate group : 1