media-video/totem 2.32.0-r2 generates a blocking "internal data flow error" when trying to play any DVD It appears that media-video/totem 2.32.0-r2 is not compatible with media-libs/gst-plugins-base-0.10.36 that was upgraded by portage on my system recently However totem can read DVDs no problem with media-libs/gst-plugins-base-0.10.35.
Totem 2.32.0-r2 works again with gst-plugins-base-0.10.36 after first downgrading to gst-plugins-base-0.10.35 and re-emerging world