diff --git a/avconv_opt.c b/avconv_opt.c
index 0eb601b460..ffb6c650ce 100644
--- a/avconv_opt.c
+++ b/avconv_opt.c
@@ -276,6 +276,7 @@ static int opt_attach(void *optctx, const char *opt, const char *arg)
 
 /**
  * Parse a metadata specifier passed as 'arg' parameter.
+ * @param arg  metadata string to parse
  * @param type metadata type is written here -- g(lobal)/s(tream)/c(hapter)/p(rogram)
  * @param index for type c/p, chapter/program index is written here
  * @param stream_spec for type s, the stream specifier is written here
diff --git a/cmdutils.h b/cmdutils.h
index dd86235fa8..4cb5b8312b 100644
--- a/cmdutils.h
+++ b/cmdutils.h
@@ -186,6 +186,8 @@ int show_help(void *optctx, const char *opt, const char *arg);
  * Parse the command line arguments.
  *
  * @param optctx an opaque options context
+ * @param argc   number of command line arguments
+ * @param argv   values of command line arguments
  * @param options Array with the definitions required to interpret every
  * option of the form: -option_name [argument]
  * @param parse_arg_function Name of the function called to process every
@@ -231,6 +233,8 @@ int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec);
  * Create a new options dictionary containing only the options from
  * opts which apply to the codec with ID codec_id.
  *
+ * @param opts     dictionary to place options in
+ * @param codec_id ID of the codec that should be filtered for
  * @param s Corresponding format context.
  * @param st A stream from s for which the options should be filtered.
  * @param codec The particular codec for which the options should be filtered.
@@ -349,6 +353,7 @@ int read_yesno(void);
  * Read the file with name filename, and put its content in a newly
  * allocated 0-terminated buffer.
  *
+ * @param filename file to read from
  * @param bufptr location where pointer to buffer is returned
  * @param size   location where size of buffer is returned
  * @return 0 in case of success, a negative value corresponding to an
@@ -373,6 +378,7 @@ void init_pts_correction(PtsCorrectionContext *ctx);
  * which might have incorrect times. Input timestamps may wrap around, in
  * which case the output will as well.
  *
+ * @param ctx the PtsCorrectionContext carrying stream pts information
  * @param pts the pts field of the decoded AVPacket, as passed through
  * AVCodecContext.reordered_opaque
  * @param dts the dts field of the decoded AVPacket
@@ -404,8 +410,10 @@ FILE *get_preset_file(char *filename, size_t filename_size,
  * Realloc array to hold new_size elements of elem_size.
  * Calls exit() on failure.
  *
+ * @param array array to reallocate
  * @param elem_size size in bytes of each element
  * @param size new element count will be written here
+ * @param new_size number of elements to place in reallocated array
  * @return reallocated array
  */
 void *grow_array(void *array, int elem_size, int *size, int new_size);