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<div dir="auto">Hi Michael,<br />
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I’ve noticed that rtph264depay also sets the flag: <a href="https://github.com/GStreamer/gst-plugins-good/blob/20bbeb5e37666c53c254c7b08470ad8a00d97630/gst/rtp/gstrtph264depay.c#L973" target="_blank">https://github.com/GStreamer/gst-plugins-good/blob/20bbeb5e37666c53c254c7b08470ad8a00d97630/gst/rtp/gstrtph264depay.c#L973</a><br />
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Would that mean setting the flag again in h264parse is redundant if rtph264depay is in the pipeline?<br />
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Cheers,<br />
<br />
John</div>
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<div name="messageReplySection">On 31 May 2022, 5:48 AM +1000, Michael Gruner <michael.gruner@ridgerun.com>, wrote:<br />
<blockquote type="cite" style="border-left-color: grey; border-left-width: thin; border-left-style: solid; margin: 5px 5px;padding-left: 10px;">The h264parse will set the DELTA_UNIT flag based on the NAL units.
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<div><a href="https://github.com/GStreamer/gst-plugins-bad/blob/ca8068c6d793d7aaa6f2e2cc6324fdedfe2f33fa/gst/videoparsers/gsth264parse.c#L2659" class="">https://github.com/GStreamer/gst-plugins-bad/blob/ca8068c6d793d7aaa6f2e2cc6324fdedfe2f33fa/gst/videoparsers/gsth264parse.c#L2659</a></div>
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<div class="">On 30 May 2022, at 12:52, John McDermott via gstreamer-devel <<a href="mailto:gstreamer-devel@lists.freedesktop.org" class="">gstreamer-devel@lists.freedesktop.org</a>> wrote:</div>
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<div dir="auto" class="">Hi<br class="" />
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Does anyone know if key frames can be found without decoding? In the context of the pipeline rtspsrc->rtph264depay->h264parse->appsink, which element sets the GST_BUFFER_FLAG_DELTA_UNIT flag? I read that a keyframe has a unique start code in the NAL unit. In that case, does that mean rtph264depay sets the flag?<br class="" />
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Thanks</div>
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