Fix some spelling mistakes.

Originally committed as revision 11125 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/apedec.c

@@ -514,7 +514,7 @@ static void init_predictor_decoder(APEContext * ctx)
     memset(p->historybuffer, 0, PREDICTOR_SIZE * sizeof(int32_t));
     p->buf = p->historybuffer;
 
-    /* Initialize and zero the co-efficients */
+    /* Initialize and zero the coefficients */
     memcpy(p->coeffsA[0], initial_coeffs, sizeof(initial_coeffs));
     memcpy(p->coeffsA[1], initial_coeffs, sizeof(initial_coeffs));
     memset(p->coeffsB, 0, sizeof(p->coeffsB));

libavcodec/mpegvideo.h

@@ -94,7 +94,7 @@ typedef struct ScanTable{
     uint8_t permutated[64];
     uint8_t raster_end[64];
 #ifdef ARCH_POWERPC
-                /** Used by dct_quantize_alitvec to find last-non-zero */
+                /** Used by dct_quantize_altivec to find last-non-zero */
     DECLARE_ALIGNED_8(uint8_t, inverse[64]);
 #endif
 } ScanTable;
@@ -111,7 +111,7 @@ typedef struct Picture{
     uint8_t *interpolated[3];
     int16_t (*motion_val_base[2])[2];
     uint32_t *mb_type_base;
-#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if theres just one type
+#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
 #define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
 #define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)

libavformat/rtp.c

@@ -767,7 +767,7 @@ static int rtp_write_header(AVFormatContext *s1)
         payload_type = RTP_PT_PRIVATE; /* private payload type */
     s->payload_type = payload_type;
 
-// following 2 FIXMies could be set based on the current time, theres normaly no info leak, as rtp will likely be transmitted immedeatly
+// following 2 FIXMEs could be set based on the current time, there is normally no info leak, as RTP will likely be transmitted immediately
     s->base_timestamp = 0; /* FIXME: was random(), what should this be? */
     s->timestamp = s->base_timestamp;
     s->cur_timestamp = 0;