Trying to mux mp4 by adding m4a to m4v
m4a audio is:
Writing application : Lavf57.71.100
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 2h 8mn
Bit rate mode : Variable
Bit rate : 92.8 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Frame rate : 46.875 fps (1024 spf)
Compression mode : Lossy
Stream size : 84.3 MiB (98%)
Default : Yes
Alternate group : 1
Yet I only get an error: Cannot use that file as audio track
ffmpeg/mkvtoolnix worked perfectly fine to mux to mnk/mp4
Any idea why?
sebus
Avidemux cannot use AAC muxed into a container (MP4 or Matroska) as an external audio track. Please ensure it is raw (i.e. in case of AAC either ADTS- or LATM-encapsulated).
M4A is a MP4 container without a video track. Avidemux cannot invoke demuxers for external audio tracks and additionally doesn't handle containers without a video track.
Thanks for explanation! Feature request...?
For forseeable future, please do
ffmpeg -i aac-in-mp4-container.m4a -c copy aac-raw.aac
with (symbolic) filenames and paths adjusted accordingly.