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rtph263depay: Don't drop mode b packets with picture start code
Some buggy payloaders, e.g. rtph263pay, may use mode B for packets that starts with a picture (or GOB) start code although it's not allowed. Let's be nice and not drop these packets/frames. https://bugzilla.gnome.org/show_bug.cgi?id=773516
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1 changed files with 4 additions and 3 deletions
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@ -310,9 +310,10 @@ gst_rtp_h263_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
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payload_len -= header_len;
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if (!rtph263depay->start) {
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/* do not skip this fragment if it is a Mode A with picture start code */
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if (!F && payload_len > 4 && (GST_READ_UINT32_BE (payload) >> 10 == 0x20)) {
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GST_DEBUG ("Mode A with PSC => frame start");
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/* only mode A should be used when there is a picture start code, but
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* buggy payloaders may send mode B/C in start of frame */
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if (payload_len > 4 && (GST_READ_UINT32_BE (payload) >> 10 == 0x20)) {
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GST_DEBUG ("Mode %c with PSC => frame start", "ABC"[F+P]);
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rtph263depay->start = TRUE;
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if ((! !(payload[4] & 0x02)) != I) {
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GST_DEBUG ("Wrong Picture Coding Type Flag in rtp header");
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