@@ -36,7 +36,7 @@

 static void usage(void)

 {

-    printf("Convert a libavfilter graph to a dot file\n");

+    printf("Convert a libavfilter graph to a dot file.\n");

     printf("Usage: graph2dot [OPTIONS]\n");

     printf("\n"

            "Options:\n"

@@ -133,7 +133,7 @@ int main(int argc, char **argv)

         infilename = "/dev/stdin";

     infile = fopen(infilename, "r");

     if (!infile) {

-        fprintf(stderr, "Impossible to open input file '%s': %s\n",

+        fprintf(stderr, "Failed to open input file '%s': %s\n",

                 infilename, strerror(errno));

         return 1;

     }

@@ -142,7 +142,7 @@ int main(int argc, char **argv)

         outfilename = "/dev/stdout";

     outfile = fopen(outfilename, "w");

     if (!outfile) {

-        fprintf(stderr, "Impossible to open output file '%s': %s\n",

+        fprintf(stderr, "Failed to open output file '%s': %s\n",

                 outfilename, strerror(errno));

         return 1;

     }

@@ -175,7 +175,7 @@ int main(int argc, char **argv)

     avfilter_register_all();

     if (avfilter_graph_parse(graph, graph_string, NULL, NULL, NULL) < 0) {

-        fprintf(stderr, "Impossible to parse the graph description\n");

+        fprintf(stderr, "Failed to parse the graph description\n");

         return 1;

     }

@@ -31,18 +31,18 @@

 #include <io.h>

 #endif

-#define FILENAME_BUF_SIZE 4096

-

 #include "libavutil/avstring.h"

 #include "libavutil/time.h"

 #include "libavformat/avformat.h"

+#define FILENAME_BUF_SIZE 4096

 #define PKTFILESUFF "_%08" PRId64 "_%02d_%010" PRId64 "_%06d_%c.bin"

 static int usage(int ret)

 {

-    fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");

-    fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");

+    fprintf(stderr, "Dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");

+    fprintf(stderr, "Each packet is dumped in its own file named like\n");

+    fprintf(stderr, "$(basename file.ext)_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");

     fprintf(stderr, "pktdumper [-nw] file [maxpkts]\n");

     fprintf(stderr, "-n\twrite No file at all, only demux.\n");

     fprintf(stderr, "-w\tWait at end of processing instead of quitting.\n");

@@ -79,7 +79,7 @@ int main(int argc, char **argv)

     if (strrchr(fntemplate, '.'))

         *strrchr(fntemplate, '.') = '\0';

     if (strchr(fntemplate, '%')) {

-        fprintf(stderr, "can't use filenames containing '%%'\n");

+        fprintf(stderr, "cannot use filenames containing '%%'\n");

         return usage(1);

     }

     if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= sizeof(fntemplate) - 1) {