Video doesn't play

[jdm]

https://joshmatthews.net/video2.html with GST_DEBUG=2 yields:

0:00:02.972951000  7919 0x7fae2f22bb20 WARN                 qtdemux qtdemux.c:3240:qtdemux_parse_trex:<qtdemux0> failed to find fragment defaults for stream 1
0:00:02.973100000  7919 0x7fae2f22bb20 WARN                 qtdemux qtdemux.c:3240:qtdemux_parse_trex:<qtdemux0> failed to find fragment defaults for stream 2
0:00:03.015780000  7919 0x7fae2f22bb20 WARN                   vtdec vtdec.c:317:gst_vtdec_negotiate:<vtdechw0> error: VTDecompressionSessionCreate returned -12913
0:00:03.015841000  7919 0x7fae2f22bb20 WARN            videodecoder gstvideodecoder.c:743:gboolean gst_video_decoder_setcaps(GstVideoDecoder *, GstCaps *):<vtdechw0> Subclass refused caps
0:00:03.015851000  7919 0x7fae2f22bb20 WARN               decodebin gstdecodebin2.c:2524:gboolean connect_pad(GstDecodeBin *, GstElement *, GstDecodePad *, GstPad *, GstCaps *, GValueArray *, GstDecodeChain *, gchar **):<decodebin0> Couldn't set vtdechw0 to PAUSED

[ferjm]

I'm not sure about the warnings, but the test is missing a way to start playback. Adding autoplay to the video tag makes it work for me. #23208 will hopefully help with this type of issue.

[ceyusa]

If you want to get rid for the warnings, the workaround is use the gst-libav decoders. The easiest way is uninstalling gstreamer applemedia plugin. The right way is to verify what's happening with vtdec_hw element.

[jdm]

Good point about the lack of autoplay.