[FFmpeg-user] MP4-Video does not play audio on Android 8; audio stream size tagged wrong

[Classic SSG Enjoyer]

Use Opus. Opus delievers better audio quality than AAC/Vorbis

On Tue, 24 Oct, 2023, 11:01 pm Ferdi Scholten, <ferdi at sttc-nlp.nl> wrote:

> Hi,
> >>
> >> Vorbis audio is officially not supported by the mp4 container
> >> specifications.
> >> Matroska does not have this problem as it supports almost all known
> >> codecs.
> >>
> >> These are the audio codecs that are in the mp4 specifications: AAC,
> >> ALS, SLS, MP3, MP2, MP1, CELP, HVXC, TTSI, SAOL, Apple Lossless,
> >> FLAC, Opus
> >> Others can be muxed in, but most players will not support playing those.
> >
> > Much thanks for this valuable information.
> >
> > Because I want to add several audio streams to a MP4 video, I'm
> > looking for an audio codec, with optimal compression. As AAC in my
> > context needs 128 kb/s, but Vorbis only 90 kb/s, I thought, it was a
> > good choice.
> >
> > Which audio codec you would suggest, which has a wide range of
> > compatibility, except AAC?
> >
> > Maybe Opus?
> >
> > For the video I want to use HEVC.
> >
> > Is there a possibility to encode AAC_HE with FFmpeg and would it make
> > sense?
> -Ulf
>
> For good compression and good quality you should use Opus, it delivers
> (much) better audio quality than any variant of AAC let alone Vorbis for
> the same bitrate. when you don't specify a bitrate, libopus uses 95 kb/s
> as default for stereo audio.
> -Ferdi
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