diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index 50dc4a55bd..fd84f89684 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -600,8 +600,6 @@ static int decode_frame(AVCodecContext *avctx,
     AVFrame *p, temp;
     int i, frame_4cc, frame_size;
 
-    *data_size = 0;
-
     /* special case for last picture */
     if (buf_size == 0) {
         return 0;
diff --git a/libavcodec/a52dec.c b/libavcodec/a52dec.c
index a22391f7ff..76c63b7905 100644
--- a/libavcodec/a52dec.c
+++ b/libavcodec/a52dec.c
@@ -160,7 +160,6 @@ static int a52_decode_frame(AVCodecContext *avctx,
 	2, 1, 2, 3, 3, 4, 4, 5
     };
 
-    *data_size = 0;
     buf_ptr = buf;
     while (buf_size > 0) {
         len = s->inbuf_ptr - s->inbuf;
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 53bfa56a85..fcfb3147a1 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -92,7 +92,6 @@ static int ac3_decode_frame(AVCodecContext *avctx,
 	2, 1, 2, 3, 3, 4, 4, 5
     };
 
-    *data_size = 0;
     buf_ptr = buf;
     while (buf_size > 0) {
         len = s->inbuf_ptr - s->inbuf;
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 2ce7dc87f5..0755e24fef 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -568,7 +568,6 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
         if(st) { /* handle stereo interlacing */
             c->channel = (channel + 1) % 2; /* we get one packet for left, then one for right data */
             if(channel == 1) { /* wait for the other packet before outputing anything */
-                *data_size = 0;
                 return src - buf;
             }
         }
@@ -842,7 +841,6 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
         }
         break;
     default:
-        *data_size = 0;
         return -1;
     }
     *data_size = (uint8_t *)samples - (uint8_t *)data;
diff --git a/libavcodec/amr.c b/libavcodec/amr.c
index 93f775b6f6..7b097a26ea 100644
--- a/libavcodec/amr.c
+++ b/libavcodec/amr.c
@@ -221,7 +221,6 @@ static int amr_nb_decode_frame(AVCodecContext * avctx,
     Word16 serial[SERIAL_FRAMESIZE];   /* coded bits */
     Word16 *synth;
     UWord8 *packed_bits;
-    *data_size=0;
 
     static Word16 packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
     int i;
@@ -416,7 +415,6 @@ static int amr_nb_decode_frame(AVCodecContext * avctx,
     static short block_size[16]={ 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
     enum Mode dec_mode;
     int packet_size;
-    *data_size=0;
 
     //printf("amr_decode_frame data_size=%i buf=0x%X buf_size=%d frameCount=%d!!\n",*data_size,buf,buf_size,s->frameCount);
 
@@ -603,7 +601,6 @@ static int amr_wb_decode_frame(AVCodecContext * avctx,
     int offset=0;
     int mode;
     int packet_size;
-    *data_size=0;
 
     while(offset<buf_size)
     {
diff --git a/libavcodec/asv1.c b/libavcodec/asv1.c
index 24916590f8..2ab729c176 100644
--- a/libavcodec/asv1.c
+++ b/libavcodec/asv1.c
@@ -403,8 +403,6 @@ static int decode_frame(AVCodecContext *avctx,
     AVFrame * const p= (AVFrame*)&a->picture;
     int mb_x, mb_y;
 
-    *data_size = 0;
-
     /* special case for last picture */
     if (buf_size == 0) {
         return 0;
diff --git a/libavcodec/cljr.c b/libavcodec/cljr.c
index 912a050fbd..df1f798514 100644
--- a/libavcodec/cljr.c
+++ b/libavcodec/cljr.c
@@ -43,8 +43,6 @@ static int decode_frame(AVCodecContext *avctx,
     AVFrame * const p= (AVFrame*)&a->picture;
     int x, y;
 
-    *data_size = 0;
-
     /* special case for last picture */
     if (buf_size == 0) {
         return 0;
diff --git a/libavcodec/cyuv.c b/libavcodec/cyuv.c
index aee2bc5ecc..82bc21005c 100644
--- a/libavcodec/cyuv.c
+++ b/libavcodec/cyuv.c
@@ -81,8 +81,6 @@ static int cyuv_decode_frame(AVCodecContext *avctx,
     unsigned char cur_byte;
     int pixel_groups;
 
-    *data_size = 0;
-
     /* sanity check the buffer size: A buffer has 3x16-bytes tables
      * followed by (height) lines each with 3 bytes to represent groups
      * of 4 pixels. Thus, the total size of the buffer ought to be:
diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index 8addf85367..8e359e361b 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -889,7 +889,6 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
 {
     DVVideoContext *s = avctx->priv_data;
   
-    *data_size=0;
     /* special case for last picture */
     if(buf_size==0)
         return 0;
diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c
index 01ab08a741..a85baea4b6 100644
--- a/libavcodec/ffv1.c
+++ b/libavcodec/ffv1.c
@@ -941,8 +941,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
 
     AVFrame *picture = data;
 
-    *data_size = 0;
-
     /* no supplementary picture */
     if (buf_size == 0)
         return 0;
diff --git a/libavcodec/flac.c b/libavcodec/flac.c
index 38e09363ab..7e92fa59ec 100644
--- a/libavcodec/flac.c
+++ b/libavcodec/flac.c
@@ -546,8 +546,6 @@ static int flac_decode_frame(AVCodecContext *avctx,
     int tmp = 0, i, j = 0, input_buf_size;
     int16_t *samples = data, *left, *right;
 
-    *data_size = 0;
-
     s->avctx = avctx;
     
     if(s->max_framesize == 0){
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index ea8badb9dc..1ffefa1b20 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -417,8 +417,6 @@ uint64_t time= rdtsc();
     s->flags= avctx->flags;
     s->flags2= avctx->flags2;
 
-    *data_size = 0;
-
     /* no supplementary picture */
     if (buf_size == 0) {
         /* special case for last picture */
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 77c3393efc..594a4b2642 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -5713,8 +5713,6 @@ static int decode_frame(AVCodecContext *avctx,
     s->flags= avctx->flags;
     s->flags2= avctx->flags2;
 
-    *data_size = 0;
-   
    /* no supplementary picture */
     if (buf_size == 0) {
         return 0;
diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
index 210d454190..ecc6a5fa21 100644
--- a/libavcodec/huffyuv.c
+++ b/libavcodec/huffyuv.c
@@ -684,8 +684,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
 
     AVFrame *picture = data;
 
-    *data_size = 0;
-
     /* no supplementary picture */
     if (buf_size == 0)
         return 0;
diff --git a/libavcodec/indeo3.c b/libavcodec/indeo3.c
index 12f4ced6d2..14ff02858d 100644
--- a/libavcodec/indeo3.c
+++ b/libavcodec/indeo3.c
@@ -1058,7 +1058,6 @@ static int indeo3_decode_frame(AVCodecContext *avctx,
 
     /* no supplementary picture */
     if (buf_size == 0) {
-        *data_size = 0;
         return 0;
     }
 
diff --git a/libavcodec/mace.c b/libavcodec/mace.c
index 1beac6c40d..8a4a20568c 100644
--- a/libavcodec/mace.c
+++ b/libavcodec/mace.c
@@ -421,7 +421,6 @@ puts("mace_decode_frame[6]()");
         *data_size = 2 * 6 * buf_size;
         break;
     default:
-        *data_size = 0;
         return -1;
     }
     return buf_size;
diff --git a/libavcodec/mjpeg.c b/libavcodec/mjpeg.c
index 78a620fd3c..4e2305aef6 100644
--- a/libavcodec/mjpeg.c
+++ b/libavcodec/mjpeg.c
@@ -1724,8 +1724,6 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
     int start_code;
     AVFrame *picture = data;
 
-    *data_size = 0;
-
     /* no supplementary picture */
     if (buf_size == 0)
         return 0;
@@ -1902,8 +1900,6 @@ static int mjpegb_decode_frame(AVCodecContext *avctx,
     uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;
     uint32_t field_size;
 
-    *data_size = 0;
-
     /* no supplementary picture */
     if (buf_size == 0)
         return 0;
@@ -2015,8 +2011,6 @@ static int sp5x_decode_frame(AVCodecContext *avctx,
     uint8_t *buf_ptr, *buf_end, *recoded;
     int i = 0, j = 0;
 
-    *data_size = 0;
-
     /* no supplementary picture */
     if (buf_size == 0)
         return 0;
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 93e21af100..c967908d60 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -2791,8 +2791,6 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
     MpegEncContext *s2 = &s->mpeg_enc_ctx;
     dprintf("fill_buffer\n");
 
-    *data_size = 0;
-
     /* special case for last picture */
     if (buf_size == 0 && s2->low_delay==0 && s2->next_picture_ptr) {
         *picture= *(AVFrame*)s2->next_picture_ptr;
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index a9eed4e36a..f9cb389aa2 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -2520,7 +2520,6 @@ static int decode_frame(AVCodecContext * avctx,
     int len, out_size;
     short *out_samples = data;
 
-    *data_size = 0;
     buf_ptr = buf;
     while (buf_size > 0) {
 	len = s->inbuf_ptr - s->inbuf;
diff --git a/libavcodec/oggvorbis.c b/libavcodec/oggvorbis.c
index 1ae3b624c6..f24f4fae72 100644
--- a/libavcodec/oggvorbis.c
+++ b/libavcodec/oggvorbis.c
@@ -264,7 +264,6 @@ static int oggvorbis_decode_frame(AVCodecContext *avccontext,
  
     if(!buf_size){
     //FIXME flush
-        *data_size=0;
         return 0;
     }
     
diff --git a/libavcodec/raw.c b/libavcodec/raw.c
index ee4b6fdc66..8c554c41c5 100644
--- a/libavcodec/raw.c
+++ b/libavcodec/raw.c
@@ -118,7 +118,6 @@ static int raw_decode(AVCodecContext *avctx,
     if (buf_size < bytesNeeded) {
         memcpy(context->p, buf, buf_size);
         context->p += buf_size;
-        *data_size = 0;
         return buf_size;
     }
 
diff --git a/libavcodec/roqvideo.c b/libavcodec/roqvideo.c
index bd26961dc1..7d6b518ee4 100644
--- a/libavcodec/roqvideo.c
+++ b/libavcodec/roqvideo.c
@@ -450,8 +450,6 @@ static int roq_decode_frame(AVCodecContext *avctx,
 {
     RoqContext *s = avctx->priv_data;
 
-    *data_size = 0;
-
     if (avctx->get_buffer(avctx, &s->current_frame)) {
         av_log(avctx, AV_LOG_ERROR, "  RoQ: get_buffer() failed\n");
         return -1;
diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index b67ec3974c..ade21db55e 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -651,7 +651,6 @@ static int rv10_decode_frame(AVCodecContext *avctx,
 
     /* no supplementary picture */
     if (buf_size == 0) {
-        *data_size = 0;
         return 0;
     }
 
@@ -685,8 +684,6 @@ static int rv10_decode_frame(AVCodecContext *avctx,
         }
         
         *data_size = sizeof(AVFrame);
-    }else{
-        *data_size = 0;
     }
 
     return buf_size;
diff --git a/libavcodec/svq1.c b/libavcodec/svq1.c
index b4f8e03b0b..a841816af2 100644
--- a/libavcodec/svq1.c
+++ b/libavcodec/svq1.c
@@ -600,7 +600,6 @@ static uint16_t svq1_packet_checksum (uint8_t *data, int length, int value) {
   return value;
 }
 
-#if 0
 static uint16_t svq1_component_checksum (uint16_t *pixels, int pitch,
                                          int width, int height, int value) {
   int x, y;
@@ -615,7 +614,6 @@ static uint16_t svq1_component_checksum (uint16_t *pixels, int pitch,
 
   return value;
 }
-#endif
 
 static void svq1_parse_string (GetBitContext *bitbuf, uint8_t *out) {
   uint8_t seed;
@@ -715,8 +713,6 @@ static int svq1_decode_frame(AVCodecContext *avctx,
   int		result, i, x, y, width, height;
   AVFrame *pict = data; 
 
-  *data_size=0;
-  
   if(buf==NULL && buf_size==0){
       return 0;
   }
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 413cc89637..e064626fc1 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -769,8 +769,6 @@ static int svq3_decode_frame (AVCodecContext *avctx,
   unsigned char *extradata;
   unsigned int size;
 
-  *data_size = 0;
-
   s->flags = avctx->flags;
   s->flags2 = avctx->flags2;
   s->unrestricted_mv = 1;
diff --git a/libavcodec/truemotion1.c b/libavcodec/truemotion1.c
index 2f63101925..b742d80be4 100644
--- a/libavcodec/truemotion1.c
+++ b/libavcodec/truemotion1.c
@@ -547,8 +547,6 @@ static int truemotion1_decode_frame(AVCodecContext *avctx,
     if (buf_size == 0)
         return 0;
 
-    *data_size = 0;
-    
     if (truemotion1_decode_header(s) == -1)
         return -1;
 
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index df2a1e1359..df5aebb9ce 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -488,6 +488,7 @@ int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
 {
     int ret;
     
+    *got_picture_ptr= 0;
     ret = avctx->codec->decode(avctx, picture, got_picture_ptr, 
                                buf, buf_size);
 
@@ -508,6 +509,7 @@ int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
 {
     int ret;
 
+    *frame_size_ptr= 0;
     ret = avctx->codec->decode(avctx, samples, frame_size_ptr, 
                                buf, buf_size);
     avctx->frame_number++;
diff --git a/libavcodec/vcr1.c b/libavcodec/vcr1.c
index 05539452a4..9a706af315 100644
--- a/libavcodec/vcr1.c
+++ b/libavcodec/vcr1.c
@@ -45,8 +45,6 @@ static int decode_frame(AVCodecContext *avctx,
     uint8_t *bytestream= buf;
     int i, x, y;
 
-    *data_size = 0;
-
     /* special case for last picture */
     if (buf_size == 0) {
         return 0;
diff --git a/libavcodec/vmdav.c b/libavcodec/vmdav.c
index c09af13697..c11f80af6a 100644
--- a/libavcodec/vmdav.c
+++ b/libavcodec/vmdav.c
@@ -522,7 +522,6 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
     if (buf_size < 16)
         return buf_size;
 
-    *data_size = 0;
     if (buf[6] == 1) {
         /* the chunk contains audio */
         *data_size = vmdaudio_loadsound(s, output_samples, p, 0);
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 59d183505e..e140ae3fdb 100644
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -2474,8 +2474,6 @@ static int vp3_decode_frame(AVCodecContext *avctx,
     GetBitContext gb;
     static int counter = 0;
 
-    *data_size = 0;
-
     init_get_bits(&gb, buf, buf_size * 8);
     
     if (s->theora && get_bits1(&gb))