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Decoding H.264 stream using Wireshark
From: Anirud <cuteanirud () gmail com>
Date: Mon, 19 Jul 2010 15:17:19 -0400
Hi all, A newbie question here. I have been using Wireshark for only a couple of days now. I downloaded the binary 1.2.9 for Windows and managed to capture a few transport packets - UDP containing RTP. The conversation uses H.264 video bitstream. I instructed Wireshark to "Decode As" -> "Transport UDP source port(s) as" RTP. I saw that the payload-type is DynamicRTP-Type-96 so then in the Edit->Preferences-Protocols-H264, I selected the payload type as 96. This really helped me and I could see the packet headers and even the payload. However, I am unable to dissect the H264 bitstream. Wireshark shows something like follows and doesn't go inside the "H264 bitstream". I downloaded the source for Wireshark and found wireshark-1.2.9/epan/dissectors/packet-h264.c which suggests that I should be able to see the syntax elements and various other fields as well. Obviously, I am doing something wrong and/or stupid. Please advice. Any pointers greatly appreciated. Thanks and regards, Anirud --------- One selected packet was exported to text file as follows -------- Real-Time Transport Protocol 10.. .... = Version: RFC 1889 Version (2) ..0. .... = Padding: False ...1 .... = Extension: True .... 0000 = Contributing source identifiers count: 0 0... .... = Marker: False Payload type: DynamicRTP-Type-96 (96) Sequence number: 35525 Timestamp: 2966614680 Synchronization Source identifier: 0x00000001 (1) Defined by profile: 48862 Extension length: 3 Header extensions Header extension: 1711276032 Header extension: 2615214809 Header extension: 1912602625 H.264 NAL unit header or first byte of the payload 0... .... = F bit: No bit errors or other syntax violations .01. .... = Nal_ref_idc (NRI): 1 ...1 1000 = Type: STAP-A (24) H264 bitstream ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- Decoding H.264 stream using Wireshark Anirud (Jul 19)
- Re: Decoding H.264 stream using Wireshark Jaap Keuter (Jul 19)
- Re: Decoding H.264 stream using Wireshark Anirud (Jul 20)
- Re: Decoding H.264 stream using Wireshark Jaap Keuter (Jul 19)