ges-launch black video

[Kevron Rees]

I'm trying to use ges-launch 1.14.0 (from ubuntu) to combine several video
clips together.  The result is that after the first video clip, the video
is black.  Audio is still playing, but no video :(.  Is my command broken?

/usr/bin/ges-launch-1.0 +clip 'file:///path/VID_20180430_102604739.mp4' \
+clip 'file:///path/VID_20180430_103346866.mp4' \
+clip 'file:///path/VID_20180430_103803754.mp4' \
+clip 'file:///path/VID_20180430_104534024.mp4' \
+clip 'file:///path/VID_20180430_104722857.mp4' \
+clip 'file:///path/VID_20180430_105058972.mp4' \
-o 'output.mp4' \
-f
'video/quicktime,variant=iso:video/x-264:audio/mpeg,mpegversion=1,layer=3'
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20180504/b442ba9f/attachment.html>