Extracting AAC LC & shortening silences from MPEG-4?

[DynVec]

On a VOD of a >*5 hrs stream there were some technical issues resulting in silences, which I estimate their average approaching 5 mins. I'd like for the audio to be extracted as well as significantly reducing the duration of silences. Silences don't need to be completely cropped out, reducing them > 3/4 is sufficient, I mention this as if there's a way to remove audio "blocks" while leaving the remaining original audio the same would be amazing, with no decompressing nor compressing ; it the silences beginnings & ends are detected and only the "blocks" completely fitting in the silences are removed. My system is Windows 10 but Cygwin is installed on it, thus has access to come *NIX features, although often lagging 1-2 versions (from the current one). See the attached screenshot as well as the quote below for information about the video.

Thank you kindly for your help

General
Complete name : [PATH]\[4-23-23] Catch22 - Pretty Jungle - Syrup Spunday's - Intelligent Jungle and Atmospheric DNB.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 713 MiB
Duration : 5 h 24 min
Overall bit rate mode : Variable
Overall bit rate : 307 kb/s
Frame rate : 30.000 FPS
Movie name : Pretty Jungle - Syrup Spunday's - Intelligent Jungle and Atmospheric DNB (1801534574)
Performer : Catch22
Recorded date : 2023
Writing application : Lavf60.3.100
Comment : Originally aired: 2023-04-23 14:58:57Z / Video id: 1801534574

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L1.2
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=1, N=60
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 5 h 24 min
Source duration : 5 h 24 min
Bit rate mode : Constant
Bit rate : 180 kb/s
Width : 284 pixels
Height : 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 30.000 FPS
Minimum frame rate : 29.412 FPS
Maximum frame rate : 31.250 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.132
Stream size : 419 MiB (59%)
Source stream size : 419 MiB (59%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 5 h 24 min
Source duration : 5 h 24 min
Bit rate mode : Variable
Bit rate : 119 kb/s
Maximum bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 276 MiB (39%)
Source stream size : 276 MiB (39%)
Default : Yes
Alternate group : 1

[ProWo]

If you cut the silences you will go out of synch with the video.

[DynVec]

After--extracting--I'll delete the original.

[butterw]

- You can cut aac audio losslessly on audio blocks. mp3DirectCut can manually cut .m4a/aac.
- You can cut video losslessly on keyframes.

I don't know if there is software that can handle detect and cut audio silence automatically, but it's not impossible.

[ProWo]

After--extracting--I'll delete the original.

You can use clever FFmpeg-GUI for extracting.

[Attachment 71878 - Click to enlarge]