<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> Hi You can try installing a buffer probe on the queue and checking the levels to figure out what is going on. And listening to the overrun signal. You might also try taking a look at the `<span style="color: rgb(35, 38, 41); font-family: ui-monospace, "Cascadia Mono", "Segoe UI Mono", "Liberation Mono", Menlo, Monaco, Consolas, monospace; font-size: 13px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(227, 230, 232); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">min-threshold-` properties. Best regards Marianna <div class="moz-cite-prefix">On 22.01.2023 13.00, <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel-request@lists.freedesktop.org">gstreamer-devel-request@lists.freedesktop.org</a> wrote: </div> <blockquote type="cite" cite="mid:mailman.17.1674388802.5036.gstreamer-devel@lists.freedesktop.org"> <pre class="moz-quote-pre" wrap="">Send gstreamer-devel mailing list submissions to <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> To subscribe or unsubscribe via the World Wide Web, visit <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> or, via email, send a message with subject or body 'help' to <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel-request@lists.freedesktop.org">gstreamer-devel-request@lists.freedesktop.org</a> You can reach the person managing the list at <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel-owner@lists.freedesktop.org">gstreamer-devel-owner@lists.freedesktop.org</a> When replying, please edit your Subject line so it is more specific than "Re: Contents of gstreamer-devel digest..." Today's Topics: 1. Dynamic pipeline: record frames before mux/filesink is linked (Sylvain Garrigues) ---------------------------------------------------------------------- Message: 1 Date: Sat, 21 Jan 2023 19:16:16 +0100 From: Sylvain Garrigues <a class="moz-txt-link-rfc2396E" href="mailto:sylgar@gmail.com"><sylgar@gmail.com></a> To: <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> Subject: Dynamic pipeline: record frames before mux/filesink is linked Message-ID: <a class="moz-txt-link-rfc2396E" href="mailto:3196DBB7-8007-4825-BD43-AA70AF1213FD@gmail.com"><3196DBB7-8007-4825-BD43-AA70AF1213FD@gmail.com></a> Content-Type: text/plain; charset=utf-8 Hello, I?m trying to setup a pipeline which can record parts of the currently displayed stream on demand (I have a ctrl-c handler installed which start/stop the recording), INCLUDING 5 seconds before the signal is emitted. It works perfectly except the recording doesn?t start 5 seconds before the signal but 2/3 seconds after. I have this pipeline: filesrc location="longvideo.mp4" -> qtdemux -> tee -> queue -> h264parse -> ? -> autovideosink On the other branch of the tee i.e. the recording one I have: tee -> queue (named queue_recording) I have set the recording queue to act like a 10 seconds ring buffer: queue_recording.set_property_from_str("max-size-time", "10000000000"); queue_recording.set_property_from_str("max-size-buffers", "0"); queue_recording.set_property_from_str("max-size-bytes", "0"); queue_recording.set_property_from_str("leaky", "2"); (This is Rust code). I have the pipeline playing and start watching the video. When I hit ctrl-C and my program detects it, it add matroskamux -> filesink location="record.mkv" to the pipeline and link the video_0 sink pad of the matroskamux to queue_recording which was already there. Since I hit ctrl-c more than 10 seconds after the video is playing, I expected the resulting record.mpv to display frames from 10 seconds before the crtl-c signal since the queue_recording has stored those frame on the sink side and there was no consumer on the src side before the matrosmamux was linked. Can anybody explain me why I don?t get what I expect (the recording starting 10 seconds before the signal), and how you would solve my problem? I already manage, when hitting ctrl-c another time to stop the recording, to block the src_1 pad of the tee win a probe and send an EOS to the queue and unlink it, and when the pipeline bus gets the eos message from filesink (via message forward), I can remove the queue / matroskamux / filesink pair - just waiting for another signal to start another recording. I can share the source code if needed. Best ------------------------------ Subject: Digest Footer _______________________________________________ gstreamer-devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> ------------------------------ End of gstreamer-devel Digest, Vol 144, Issue 28 ************************************************ </pre> </blockquote> <pre class="moz-signature" cols="72">-- Best regards / Med venlig hilsen “Marianna Smidth Buschle”</pre> </body> </html>