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2 byte shorter userdata for mpeg4

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in the past it was startcode,string,00,7F,startcode
now it is startcode,string,stratcode
both are mpeg4 compliant, as according to the standard the userdata lasts until the next 00 00 01 (startcode prefix) but some very primitive decoders which simply skip until the first 00 byte and then expect the next valid startcode might fail with the old variant, just a theory though (didnt test if quicktime can decode it now)

Originally committed as revision 2767 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2004-02-08 22:52:35 +00:00
parent f02ab8148c
commit 99683a3077
4 changed files with 8 additions and 8 deletions
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4
libavcodec/mjpeg.c
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@@ -378,7 +378,7 @@ static void jpeg_put_comments(MpegEncContext *s)
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
put_string(p, "JFIF"); /* this puts the trailing zero-byte too */
put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
put_bits(p, 16, 0x0201); /* v 1.02 */
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
@@ -393,7 +393,7 @@ static void jpeg_put_comments(MpegEncContext *s)
flush_put_bits(p);
ptr = pbBufPtr(p);
put_bits(p, 16, 0); /* patched later */
put_string(p, LIBAVCODEC_IDENT);
put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
ptr[0] = size >> 8;
ptr[1] = size;