<html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> On 20/03/2016 10:35, Sebastian Dröge wrote: <blockquote cite="mid:1458466515.19056.1.camel@centricular.com" type="cite"> <pre wrap="">On Sa, 2016-03-19 at 18:11 +0100, Davide Tuccilli wrote: </pre> <blockquote type="cite"> <pre wrap="">Oh I see, I thought it had the same effect. I've been trying to play around with the capsfilter, from my understanding h264parse does the conversion, so I should do something like queue ! capsfilter caps=video/x-h264,stream-format=avc ! h264parse ! mp4mux ! filesink, but when I do this, the linking between the tee src_%u pad and the queue sink pad fails. </pre> </blockquote> <pre wrap=""> You will need one h264parse per branch then. Each of them can only convert into one stream format, so the one before the tee might convert into one that the mp4mux branch does not like. </pre> <fieldset class="mimeAttachmentHeader"></fieldset> <pre wrap="">_______________________________________________ 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> </pre> </blockquote> I've been trying a lot of things, and I noticed that I'm actually having problems even with a static pipeline that tries to achieve the same goal. I'm creating a pipeline like this: { m_recordBin = gst_pipeline_new(nullptr); GstElement * v4l2src = gst_element_factory_make("v4l2src", "recsource"); GstElement * capsFilter = gst_element_factory_make("capsfilter", nullptr); GstElement * h264parse = gst_element_factory_make("h264parse", nullptr); GstElement * mux = gst_element_factory_make("mp4mux", nullptr); // mpegtsmux, qtmux, mp4mux GstElement * muxCaps = gst_element_factory_make("capsfilter", nullptr); GstElement * fileSink = gst_element_factory_make("filesink", nullptr); g_object_set(G_OBJECT(fileSink), "location", filename, nullptr); g_object_set(G_OBJECT(fileSink), "sync", TRUE, nullptr); g_object_set(G_OBJECT(v4l2src), "device", "/dev/video1", nullptr); GstCaps * caps = gst_caps_new_simple("video/x-h264", "width", G_TYPE_INT, 720, "height", G_TYPE_INT, 576, "framerate", GST_TYPE_FRACTION, 25, 1, nullptr); g_object_set(G_OBJECT(capsFilter), "caps", caps, nullptr); GstCaps * capsavc = gst_caps_new_simple("video/x-h264", "stream-format", G_TYPE_STRING, "avc", "alignment", G_TYPE_STRING, "au", nullptr); g_object_set(G_OBJECT(muxCaps), "caps", capsavc, nullptr); gst_bin_add_many(GST_BIN(m_recordBin), v4l2src, capsFilter, h264parse, muxCaps, mux, fileSink, nullptr); if (!gst_element_link_many(v4l2src, capsFilter, h264parse, muxCaps, mux, fileSink, nullptr)) { return false; } else { return true; } } and the weird part is that some times it works, sometimes it doesn't and i get the same broken/invalid nal messages from h264parse I created a function that iterates over the pads of this pipeline and prints the current caps, and when it works the result is like this: filesink0 sink : video/quicktime, variant=(string)iso mp4mux0 src : video/quicktime, variant=(string)iso mp4mux0 video_0 : video/x-h264, stream-format=(string)avc, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, parsed=(boolean)true, profile=(string)high, level=(string)4, codec_data=(buffer)01640028ffe1007267640028ad84054562b8ac5474202a2b15c562a3a1015158ae2b151d080a8ac57158a8e84054562b8ac5474202a2b15c562a3a10248521393c9f27e4fe4fc9f279b9b34d081242909c9e4f93f27f27e4f93cdcd9a6b405a093499000003e80000c350e040007a12000112a8bdef85e1108d401000468ee3c30 capsfilter1 sink : video/x-h264, stream-format=(string)avc, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, parsed=(boolean)true, profile=(string)high, level=(string)4, codec_data=(buffer)01640028ffe1007267640028ad84054562b8ac5474202a2b15c562a3a1015158ae2b151d080a8ac57158a8e84054562b8ac5474202a2b15c562a3a10248521393c9f27e4fe4fc9f279b9b34d081242909c9e4f93f27f27e4f93cdcd9a6b405a093499000003e80000c350e040007a12000112a8bdef85e1108d401000468ee3c30 capsfilter1 src : video/x-h264, stream-format=(string)avc, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, parsed=(boolean)true, profile=(string)high, level=(string)4, codec_data=(buffer)01640028ffe1007267640028ad84054562b8ac5474202a2b15c562a3a1015158ae2b151d080a8ac57158a8e84054562b8ac5474202a2b15c562a3a10248521393c9f27e4fe4fc9f279b9b34d081242909c9e4f93f27f27e4f93cdcd9a6b405a093499000003e80000c350e040007a12000112a8bdef85e1108d401000468ee3c30 h264parse0 sink : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 h264parse0 src : video/x-h264, stream-format=(string)avc, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1, parsed=(boolean)true, profile=(string)high, level=(string)4, codec_data=(buffer)01640028ffe1007267640028ad84054562b8ac5474202a2b15c562a3a1015158ae2b151d080a8ac57158a8e84054562b8ac5474202a2b15c562a3a10248521393c9f27e4fe4fc9f279b9b34d081242909c9e4f93f27f27e4f93cdcd9a6b405a093499000003e80000c350e040007a12000112a8bdef85e1108d401000468ee3c30 capsfilter0 sink : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 capsfilter0 src : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 recsource src : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 When it doesn't the result is like this: filesink0 sink : NULL mp4mux0 src : NULL mp4mux0 video_0 : NULL capsfilter1 sink : NULL capsfilter1 src : NULL h264parse0 sink : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 h264parse0 src : NULL capsfilter0 sink : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 capsfilter0 src : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 recsource src : video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1 Any reason the current caps might result null for the muxer video_0/h264parse src pads? For what I understand, that's the problem right? I should have stream-format=avc there. I'm not sure how to debug this. </body> </html>