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Before this patch, there could be duplicate payload types in offers that have, within a media section, multiple codecs and RTX enabled: ``` m=video 9 UDP/TLS/RTP/SAVPF 96 97 97 <-- HAS DUPLICATES a=sendrecv a=rtpmap:96 VP8/90000 a=rtcp-fb:96 nack a=rtcp-fb:96 nack pli a=rtcp-fb:96 ccm fir a=rtcp-fb:96 transport-cc a=rtpmap:97 H264/90000 a=rtcp-fb:97 nack a=rtcp-fb:97 nack pli a=rtcp-fb:97 ccm fir a=rtcp-fb:97 transport-cc a=rtpmap:97 rtx/90000 <--------- PT IS DUPLICATE a=fmtp:97 apt=96 ``` Fix this by populating the media_mapping array with all media formats rather than only the first one. The added test case reproduces the issue, which fails without this patch. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8259> |
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