add initial files

.gitignore

@@ -0,0 +1 @@
+/hello

Makefile

@@ -0,0 +1,9 @@
+TARGET := hello
+OBJS := hello.o
+CFLAGS := $$(pkg-config --cflags libavformat) -Wall
+LDFLAGS := $$(pkg-config --libs libavformat)
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(CC) -o $@ $^ $(LDFLAGS)

hello.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <libavformat/avformat.h>
+
+int main(int argc, char * argv[])
+{
+    if (argc < 2)
+    {
+        fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
+        return 1;
+    }
+
+    AVFormatContext * context = NULL;
+    av_register_all();
+    if (avformat_open_input(&context, argv[1], NULL, NULL) != 0)
+    {
+        fprintf(stderr, "Error opening input stream %s\n", argv[1]);
+        return 2;
+    }
+
+    avformat_close_input(&context);
+
+    return 0;
+}