Description:

Some videos that are embedded in PDFs can not be played back, even if gst-plugins-good is installed. For correct playback, the installation of gst-libav is required. Please add it to the optional dependencies, just as gst-plugins-good currently is.

Additional info:

The video was created from a series of PNG images, using the following command:
ffmpeg -f image2 -i img_%04d.png -c:v libx264 -crf 18 -preset veryslow outvid.mp4


Steps to reproduce:

1) Create a video from a series of PNGs as described above.
2) Embed it into a LaTeX presentation using the href method, e.g.:
\href{run:outvid.mp4?autostart&loop}{\includegraphics[width=\paperwidth,height=0.94\paperheight,keepaspectratio]{outvid_frame}}
3) Open in pdfpc.

Without gst-libav the video will not play. Install gst-libav, and then the video will play correctly.