<HTML><BODY><div><div>Thank you for reply,Jeff!</div><div> </div><div>But where I can find code samples for this? For example for userdata.<br> </div><blockquote style="border-left:1px solid #0857A6; margin:10px; padding:0 0 0 10px;">Понедельник, 31 июля 2023, 14:39 +03:00 от Jeff Shanab <jshanab@jfs-tech.com>:<br> <div id=""><div class="js-helper js-readmsg-msg"><div><div id="style_16908035400327524697_BODY"><div class="cl_844430"><div>Substreams, Subtitles, Userdata which is an offset to start of video data so things like motion vectors</div> <div class="gmail_quote_mr_css_attr"><div class="mail-quote-collapse"><div class="gmail_attr_mr_css_attr"><span data-type="sender">On Mon, Jul 31, 2023 at 4:29AM Антон Шаров via gstreamer-devel <<a href="//e.mail.ru/compose/?mailto=mailto%3agstreamer%2ddevel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a>> wrote:</span></div><div data-type="body"><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote_mr_css_attr"><div><div><div>Put it simple — is there any way to persist some (meta)data within each frame so that later one could read</div><div>from mp4 file each frame with it’s (meta)data? Ideally, I need it to be reference timestamps (camera capture time).</div><div>So, I’ve supposed that <a href="https://gstreamer.freedesktop.org/documentation/gstreamer/gstbuffer.html?gi-language=c#GstReferenceTimestampMeta" target="_blank">https://gstreamer.freedesktop.org/documentation/gstreamer/gstbuffer.html?gi-language=c#GstReferenceTimestampMeta</a> is persisted in file (mp4) for each frame but it seems not to be the case.</div><div>Or, probably, I misunderstood something.</div><div> </div> <div> </div></div></div></blockquote></div></div></div></div></div></div></div></div></blockquote> <div> </div><div data-signature-widget="container"><div data-signature-widget="content"><div>--<br>С Уважением,<br>Шаров Антон</div></div></div><div> </div></div></BODY></HTML>