lavf: Set pos for all packets of AVSTREAM_PARSE_FULL_RAW files.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/avformat.h

@@ -578,7 +578,9 @@ enum AVStreamParseType {
     AVSTREAM_PARSE_HEADERS,    /**< Only parse headers, do not repack. */
     AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
     AVSTREAM_PARSE_FULL_ONCE,  /**< full parsing and repack of the first frame only, only implemented for H.264 currently */
-    AVSTREAM_PARSE_FULL_RAW=MKTAG(0,'R','A','W'),       /**< full parsing and repack with timestamp generation for raw */
+    AVSTREAM_PARSE_FULL_RAW=MKTAG(0,'R','A','W'),       /**< full parsing and repack with timestamp and position generation by parser for raw
+                                                             this assumes that each packet in the file contains no demuxer level headers and
+                                                             just codec level data, otherwise position generaion would fail */
 };
 
 typedef struct AVIndexEntry {

libavformat/utils.c

@@ -1216,6 +1216,9 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
         out_pkt.dts = st->parser->dts;
         out_pkt.pos = st->parser->pos;
 
+        if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
+            out_pkt.pos = st->parser->frame_offset;
+
         if (st->parser->key_frame == 1 ||
             (st->parser->key_frame == -1 &&
              st->parser->pict_type == AV_PICTURE_TYPE_I))