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How to decode DVI4 8K Payload in Wireshark?

asked 2020-08-22 18:48:47 +0000

Eagle gravatar image

updated 2020-08-22 19:50:26 +0000

grahamb gravatar image

How to save and play RTP streams having payload DVI4 8K? Is there any free software which decodes this payload like G729 decoder which decodes G729 payload successfully.....?? If anybody has the software please send me the link here so that I could download and install that software.


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answered 2020-08-22 20:03:22 +0000

grahamb gravatar image

updated 2020-08-23 18:34:53 +0000

Wireshark has been able to handle dissection of DVI4 8K for a long time. One of the RTP captures on the Sample Captures wiki page contains DVI4 8K data, it's conveniently named sip-rtp-dvi4.pcap.

Playing the audio stream may be more difficult, on my machine (Windows 10, Wireshark dev build 3.3.0-rc) I don't hear any audio from the stream.

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But I'm not able to decode DVI4 8K payload. As I've saved the RTP streams in .raw format and tried to play by audacity using 32kb ADPCM and clock rate 8000, 16000 Hz, but what I get in result is just noise only. So plz let me know is there any software or setting in wireshark to save and listen this PT DVI4 8K. Anybody having any idea please share.

Eagle gravatar imageEagle ( 2020-08-23 11:25:07 +0000 )edit

Anybody who could tell step by step procedure to decode or analyse Payload Type DVI4 8K, 16K...???? Also I've tried the sample capture given above in the comment section, but that was not the exact one that is it's not DVI4, It's different payload type....So again not abled to solve my problem.....????

Eagle gravatar imageEagle ( 2020-08-24 10:48:31 +0000 )edit

From frame 1 of the capture:

Session Description Protocol
    Session Description Protocol Version (v): 0
    Owner/Creator, Session Id (o): - 42 42 IN IP4
        Owner Username: -
        Session ID: 42
        Session Version: 42
        Owner Network Type: IN
        Owner Address Type: IP4
        Owner Address:
    Session Name (s): -
    Connection Information (c): IN IP4
        Connection Network Type: IN
        Connection Address Type: IP4
        Connection Address:
    Time Description, active time (t): 0 0
        Session Start Time: 0
        Session Stop Time: 0
    Media Description, name and address (m): audio 6000 RTP/AVP 5
        Media Type: audio
        Media Port: 6000
        Media Protocol: RTP/AVP
        Media Format: **DVI4 8000** samples/s
    Media Attribute (a): rtpmap:5 **DVI4/8000**
        Media Attribute Fieldname: rtpmap
        Media Format: 5
        MIME Type: **DVI4**
        Sample Rate: **8000**
    Media Attribute (a): recvonly
    [Generated Call-ID: [email protected]]

and ...(more)

grahamb gravatar imagegrahamb ( 2020-08-24 11:41:36 +0000 )edit

What does the dissection show for your capture? Can you share the capture on a public share, e.g. Google Drive, DropBox etc.? If so post a link to it back here.

grahamb gravatar imagegrahamb ( 2020-08-24 11:43:23 +0000 )edit

You mean to say SDP has to be downloaded as an compulsory software to decode DVI4 8K....?? If yes...Then I've tried for SDP over internet but failed to download the exact one free software. Could you plz send the link here to download SDP, so that I can kill my issue??

Eagle gravatar imageEagle ( 2020-08-24 13:36:37 +0000 )edit

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Asked: 2020-08-22 18:48:47 +0000

Seen: 538 times

Last updated: Aug 23 '20