<div dir="auto"><div> <div class="gmail_quote"><div dir="ltr">Le jeu. 20 sept. 2018 07 h 57, Amit Pandya <<a href="mailto:amit4gst@gmail.com">amit4gst@gmail.com</a>> a écrit : </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all, Following pipeline used for 4K H264 encode using qtmux pipeline, </blockquote></div></div><div dir="auto"> </div><div dir="auto">Could it be related to <a href="https://bugzilla.gnome.org/show_bug.cgi?id=796761">https://bugzilla.gnome.org/show_bug.cgi?id=796761</a> ?</div><div dir="auto"> </div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> *a) gst-launch-1.0 videotestsrc num-buffers=100 ! 'video/x-raw, width=(int)3840, height=(int)2160, format=(string)I420' ! x264enc ! h264parse ! qtmux ! filesink location=test_x264enc_3840x2160_I420_100frames.mp4 -v -e* .... /GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264, codec_data=(buffer)01640033ffe1001e67640033acd9403c0043ec05a848104a000003000200000300791e30632c01000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)5.1, profile=(string)high, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, interlace-mode=(string)progressive, *colorimetry=(string)bt2020*, chroma-site=(string)mpeg2, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, codec_data=(buffer)01640033ffe1001e67640033acd9403c0043ec05a848104a000003000200000300791e30632c01000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)5.1, profile=(string)high, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, interlace-mode=(string)progressive, *colorimetry=(string)bt2020*, chroma-site=(string)mpeg2, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true /GstPipeline:pipeline0/GstQTMux:qtmux0.GstQTMuxPad:video_0: caps = video/x-h264, codec_data=(buffer)01640033ffe1001e67640033acd9403c0043ec05a848104a000003000200000300791e30632c01000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)5.1, profile=(string)high, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, interlace-mode=(string)progressive, *colorimetry=(string)bt2020*, chroma-site=(string)mpeg2, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, codec_data=(buffer)01640033ffe1001e67640033acd9403c0043ec05a848104a000003000200000300791e30632c01000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)5.1, profile=(string)high, width=(int)3840, height=(int)2160, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1, interlace-mode=(string)progressive, *colorimetry=(string)bt2020*, chroma-site=(string)mpeg2, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono With above x264enc 4k encode pipelines colorimetry bt2020 is getting negotiated & same is used by the qtmux element. *b) gst-launch-1.0 filesrc location=test_x264enc_3840x2160_I420_100frames.mp4 ! qtdemux ! h264parse ! 'video/x-h264, stream-format=(string)byte-stream, alignment=(string)au' ! fakesink -v -e* .... /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)5.1, profile=(string)high, codec_data=(buffer)01640033ffe1001e67640033acd9403c0043ec05a848104a000003000200000300791e30632c01000568ebecb22c, width=(int)3840, height=(int)2160, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, *colorimetry=(string)2:6:0:7* /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, stream-format=(string)byte-stream, alignment=(string)au, level=(string)5.1, profile=(string)high, width=(int)3840, height=(int)2160, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, *colorimetry=(string)2:6:0:7*, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true When use above pipelines using same encoded mp4 file from a) then qtdemux provides colorimetry=2:6:0:7 with output caps. Now, this colorimetry values are different then the format derived colorimetry values for bt2020=2:6:11:7. Issue seems to be arising from the way qtmux generates ext_atom for colr_ext for colorimetry. while building colr_extension atom "colorimetry->transfer" enum for GST_VIDEO_TRANSFER_BT2020_12 is not handled. (Refer gst-plugins-good-1.14.3: gst/isomp4/gstqtmux.c+5594 & gst/isomp4/atoms.c+4152 ) With qtdemux implementation also while parsing the track for colr_extension atom respective case is not handled yielding "colorimetry->transfer" enum value for GST_VIDEO_TRANSFER_UNKNOWN(0). (Refer gst-plugins-good-1.14.3: gst/isomp4/qtdemux.c+10168) Above creates problem with the decode pipeline where decoder have colorimetry equality check for format derived colorimetry (bt2020-"2:6:11:7") with caps received colorimetry values "2:6:0:7" in _set_format() It appears to be missing functionality with qtmux/qtdemux implementation & enhancement should be done for handling bt2020 colorimetry value of GstVideoTransferFunction. Let me know in case any relevant inputs. -Thanks. -- Sent from: <a href="http://gstreamer-devel.966125.n4.nabble.com/" rel="noreferrer noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div></div></div>