How can I open vptt - viber video message format?

Question

Data conversion

what can be used to cover vptt - viber video message format. normal media players do not open. vlc opened only the first frame. Viber support has not responded to anything sensible yet.
QMPlay2 was advised on one forum, but it did not open anything for me

Answer 1

Just take it and open it will not work, there is no such program
This forum has a small analysis of the format https://forums.bunsenlabs.org/viewtopic.php?id=5769
The file itself is an archive with 2 files inside
. The first file is a picture, the second file RTP stream
rtp stream can be converted to a video file via ffmpeg, but you need to know the codec, they write that the VP8 codec
for audio - the opus codec
on the forum there is a final solution in 2 commands, one starts streaming the stream, the other captures it via ffmpeg and writes to mkv .

ffmpeg -v warning -protocol_whitelist file,udp,rtp -f sdp  -i SDP  -copyts -c copy -y video.mkv

and then in another terminal:

rtpplay -T -f video 127.0.0.1/4646 & rtpplay -T -f video 127.0.0.1/4848