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dkim0419 / SoundRecorder

A simple sound recording app implementing Material Design
GNU General Public License v3.0
1.49k stars 808 forks source link

Any Format ? #140

Open Beelucky opened 4 years ago

Beelucky commented 4 years ago

Perhaps format to mp3 or ogg that little size bitrate

ChaoticNeutralCzech commented 9 months ago

The audio is stored as AAC in the MP4 container, which should ideally have an m4a extension, as I outlined in Issue 148. AAC is about 2x better than MP3 in terms of quality/bitrate, and almost as good as OGG. So I think that your issue is not really relevant, however if you want to add an option for MP3, which is an older but slightly more compatible recording format, you can make that a new issue.

For reference, relevant MediaInfo lines for the audio stream in sample recordings with the "High-Quality" option off and on:

Property LQ HQ
Format AAC AAC
Format_AdditionalFeatures LC LC
CodecID mp4a-40-2 mp4a-40-2
BitRate_Mode CBR CBR
BitRate 13500 192000
BitRate_Nominal 12200
Channels 1 1
ChannelPositions Front: C Front: C
ChannelLayout M M
SamplesPerFrame 1024 1024
SamplingRate 8000 44100
FrameRate 7.812 43.066
Compression_Mode Lossy Lossy
Title SoundHandle SoundHandle
Language en en