Nothing will play/convert the audio in this MP4

[Alwyn]

Hi all,

I can't, for the life of me, play/extract/convert/edit the audio in this MP4. I've tried VLC, VideoRedo, Movie Edit Pro, VDub, Avidemux.

I got it using 4k video downloader from the Aussie ABC website (iview).

When I used 4k downloader on the Facebook file, it downloaded only the audio, in MP3.

I'd be grateful for any info or suggestions.

[jack_666]

There is no audio track on your upload.

Ok, I just checked. The original video has no audio.

Looks like a web cam. No audio.

[Alwyn]

I can't remember how I got it; you're right, the ABC site doesn't have audio but the Facebook version https://www.facebook.com/abcadelaide/videos/702623447783433 does.

Mediainfo is showing AAC audio.

I think I have worked out what is going on; it's Mp4A.

Audacity wants FFMPEG to be installed so I'll try that.

[jack_666]

try this

yt-dlp https://www.facebook.com/abcadelaide/videos/702623447783433 -o crab.mp4

after file is downloaded, execute this

ffmpeg -i crab.mp4 crab.mp3

Enjoy

[Alwyn]

Thanks Jack, I got Audacity working with FFMPEG and it opened the audio track OK: it appears to exist but at level 0.

[jagabo]

Yes, it has a mono aac audio track -- but it's silent.

[jack_666]

https://www.mediafire.com/file/xckssomxxfrptgk/crab2.mp3/file

[jagabo]

Ah, yes, the Facebook version has a stereo aac audio track with music. Downloaded the video as mkv with yt-dlp then demuxed the audio with ffmpeg:

ffmpeg -i crab.mkv -vn -c:a copy crab.aac

[Alwyn]

Thanks Jack666, Jagabo, I haven't got into YT-DLP yet. Will have a look.

[jagabo]

Jagabo, I haven't got into YT-DLP yet. Will have a look.

This command line will download the 1280x1024 video as "Crab cam reveals a 'hectic' underwater world off Adelaide's beaches [702623447783433].mkv"

yt-dlp https://www.facebook.com/abcadelaide/videos/702623447783433