[Feature Request] Less Data Usage, Valid Extensions for Voice Messages

[Xashyar]

I looked up the tags of voice messages, there seems to be various bit rates used (from 35 Kbps to 160 Kbps). Since Desktop uses LAME3.99.5:

1. Wouldn't OPUS or Vorbis be a better option?
   OPUS has great Speech quality at only 16kb/s.
   Demo Samples

There is also various containers used for each platform .aac, .m4a and .mpeg.
.mpeg is an invalid extension for MPEG Audio based on MediaInfo:

FileExtension_Invalid : | m1a mpa mpa1 mp1 m2a mpa2 mp2 mp3

2. The Current .mpeg container is not recognized by other apps/players.

Android (.AAC):

Format : | ADTS
Format/Info : | Audio Data Transport Stream
File size : | 66.9 KiB
Duration ~ 16s
Bit rate mode : | Variable
Overall bit rate ~ 35 kb/s

iOS (.M4A):

Format : | MPEG-4
Format profile : | Apple audio with iTunes info
File size : | 275 KiB
Duration : | 15 s 720 ms
Bit rate mode : | Constant
Overall bit rate : | 143 kb/s

Desktop (.MPEG):

Format : | MPEG Audio
Format profile : | Layer 3
File size : | 323 KiB
Duration : | 16 s 560 ms
Overall bit rate mode : | Constant
Overall bit rate : | 160 kb/s

Platform info

Signal version: v1.18.0-beta.5
Operating System: Win 10

[hiqua]

Related to this, audio messages are saved as .mpeg from desktop, but as .mp3 from Android. Desktop should save it as .mp3 as well.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.