+#define OFFSET(x) offsetof(struct video_data, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ { "standard", "", offsetof(struct video_data, standard), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
+ { "channel", "", offsetof(struct video_data, channel), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
+ { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { NULL },
+};
+
+static const AVClass v4l2_class = {
+ .class_name = "V4L2 indev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_v4l2_demuxer = {
+ .name = "video4linux2",
+ .long_name = NULL_IF_CONFIG_SMALL("Video4Linux2 device grab"),
+ .priv_data_size = sizeof(struct video_data),
+ .read_header = v4l2_read_header,
+ .read_packet = v4l2_read_packet,
+ .read_close = v4l2_read_close,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &v4l2_class,