-#: src/lib/ffmpeg_content.cc:379 src/lib/ffmpeg_content.cc:382
-#: src/lib/ffmpeg_content.cc:385 src/lib/ffmpeg_content.cc:393
-#: src/lib/ffmpeg_content.cc:396 src/lib/ffmpeg_content.cc:399
+#. / TRANSLATORS: this means that the range of pixel values used in this
+#. / file is unknown (not specified in the file).
+#. / TRANSLATORS: this means that the range of pixel values used in this
+#. / file is limited, so that not all possible values are valid.
+#. / TRANSLATORS: this means that the range of pixel values used in this
+#. / file is full, so that all possible pixel values are valid.
+#. / TRANSLATORS: this means that the range of pixel values used in this
+#. / file is unknown (not specified in the file).
+#. / TRANSLATORS: this means that the range of pixel values used in this
+#. / file is limited, so that not all possible values are valid.
+#. / TRANSLATORS: this means that the range of pixel values used in this
+#. / file is full, so that all possible pixel values are valid.
+#: src/lib/ffmpeg_content.cc:381 src/lib/ffmpeg_content.cc:386
+#: src/lib/ffmpeg_content.cc:391 src/lib/ffmpeg_content.cc:401
+#: src/lib/ffmpeg_content.cc:406 src/lib/ffmpeg_content.cc:411