Hello Guys,
I have a bunch of M4A Audio that was recorded with an open source recording app on android and I want to switch to an other app. The problem is that the new app doesn’t see m4a that are „Base Media isom (isom/iso2/mp41)” I have to convert them to “3GPP Media Release 4 / 3gp4 (isom/3gp4)” but I don’t now how.

This is what I have:
General Format/String: MPEG-4
General Format_Profile: Base Media
General CodecID/String: isom (isom/iso2/mp41)
General OverallBitRate_Mode/String: Constant
General OverallBitRate/String: 133 kb/s
General Encoded_Application/String: Lavf60.16.100
Audio 0 Format/String: AAC LC
Audio 0 Format/Info: Advanced Audio Codec Low Complexity
Audio 0 CodecID: mp4a-40-2
Audio 0 BitRate_Mode/String: Constant
Audio 0 BitRate/String: 132 kb/s
Audio 0 Channel(s)/String: 2 channels
Audio 0 ChannelLayout: L R
Audio 0 SamplingRate/String: 44.1 kHz

This is what I need:
General Format/String: MPEG-4
General Format_Profile: 3GPP Media Release 4
General CodecID/String: 3gp4 (isom/3gp4)
General OverallBitRate_Mode/String: Constant
General OverallBitRate/String: 152 kb/s
General Encoded_Application/String:
Audio 0 Format/String: AAC LC
Audio 0 Format/Info: Advanced Audio Codec Low Complexity
Audio 0 CodecID: mp4a-40-2
Audio 0 BitRate_Mode/String: Constant
Audio 0 BitRate/String: 128 kb/s
Audio 0 Channel(s)/String: 1 channel
Audio 0 ChannelLayout: M
Audio 0 SamplingRate/String: 44.1 kHz

Do you know how to batch convert to M4A that is 3GPP Media Release 4 / 3gp4 (isom/3gp4)?

Thank you.

Regards,
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