GES 1.16.0 caps negotiation problem (v2)

[Mathieu Duponchelle]

Hello David,

To answer your questions:

1. Why is this happening?

It's not really easy to tell without seeing your application, and your dot files are a bit mystifying, as both in PLAYING
and failed the tee that starts your video encoding branch does not have a sink pad.

As to the actual issue, you can see that the renegotiation fails because you're trying to push caps with a different
framerate to the muxer, which let's you know it can't support changing that on the fly.

2. How can I fix it?

Use ges_track_set_restriction_caps, with a fixed framerate.

On 7/25/19 1:23 AM, David Ing wrote:
> I'm on Fedora 30 running Gstreamer 1.16.0.
>
> I've got a GESTimeline inside of a GstPipeline.  I have attached dot files which shows the pipeline immediately after each state transition.
>
>   * NULL -> READY
>   * READY -> PAUSED
>   * PAUSED -> PLAYING
>   * PLAYING, "JobFailed", when I receive an error message on the bus
>
> I would have provided image files but graphviz doesn't like these dot files ... but you can use http://www.webgraphviz.com/ to visualize them.  They seem accurate except they show tee_video as disconnected (it is actually connected).
>
> I'm attaching a "small_logs.txt" file (less verbose) and a "big_logs.txt" file (more verbose).  The interesting bits can be observed in the small file.
>
>     19-07-24T22:53:13.786414 INFO    pan CompositionJob.cpp:123 Pipeline state changed from PAUSED to PLAYING in 0.000 seconds.
>     19-07-24T22:53:14.120278 WARNING qtmux gstqtmux.c:5118 pad video_0 refused renegotiation to video/x-h264, codec_data=(buffer)01640028ffe1001f67640028acd940780227e5c05a808080a0000003002000000303d1e30632c001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
>     19-07-24T22:53:14.120551 WARNING qtmux gstqtmux.c:5118 pad video_0 refused renegotiation to video/x-h264, codec_data=(buffer)01640028ffe1001f67640028acd940780227e5c05a808080a0000003002000000303d1e30632c001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
>     19-07-24T22:53:14.120617 WARNING GST_PADS gstpad.c:4230 could not send sticky events
>     19-07-24T22:53:14.120740 WARNING qtmux gstqtmux.c:5118 pad video_0 refused renegotiation to video/x-h264, codec_data=(buffer)01640028ffe1001f67640028acd940780227e5c05a808080a0000003002000000303d1e30632c001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
>     19-07-24T22:53:14.120822 WARNING qtmux gstqtmux.c:5118 pad video_0 refused renegotiation to video/x-h264, codec_data=(buffer)01640028ffe1001f67640028acd940780227e5c05a808080a0000003002000000303d1e30632c001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
>     19-07-24T22:53:14.120896 WARNING qtmux gstqtmux.c:5118 pad video_0 refused renegotiation to video/x-h264, codec_data=(buffer)01640028ffe1001f67640028acd940780227e5c05a808080a0000003002000000303d1e30632c001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)15/1, interlace-mode=(string)progressive, colorimetry=(string)bt709, chroma-site=(string)mpeg2
>     19-07-24T22:53:14.137918 WARNING qtdemux qtdemux.c:6607 error: Internal data stream error.
>     19-07-24T22:53:14.138040 WARNING qtdemux qtdemux.c:6607 error: streaming stopped, reason not-negotiated (-4)
>     19-07-24T22:53:14.138201 ERROR   pan CompositionJob.cpp:282 GST_MESSAGE_ERROR received from element qtdemux5 at position 5465466666: Internal data stream error.
>     ../gst-plugins-good/gst/isomp4/qtdemux.c(6607): gst_qtdemux_loop (): /GstPipeline:pipeline/GESTimeline:gestimeline0/GESVideoTrack:gesvideotrack0/NleComposition:video_nlecomposition1/GstBin:current-bin/NleSource:GESVideoUriSource:nlesource4/GstBin:videosrcbin/GstURIDecodeBin:uridecodebin2/GstDecodeBin:decodebin9/GstQTDemux:qtdemux5:
>     streaming stopped, reason not-negotiated (-4)
>
>
> My questions are:
>
>  1. Why is this happening?
>  2. How can I fix it?
>
>
> TL;DR
>
>     This issue was originally posted on another email thread, but I provided logs that were incomplete.
>
>     http://gstreamer-devel.966125.n4.nabble.com/GES-1-16-0-caps-renegotiation-problem-td4691402.html
>
>
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