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mpeg4videoenc: Support negative timestamps. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-05-09 17:50:34 +02:00
parent 282e8d4b4f
commit 38bb5a5434
1 changed files with 8 additions and 10 deletions
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18
libavcodec/mpeg4videoenc.c
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@ -880,7 +880,7 @@ void ff_set_mpeg4_time(MpegEncContext * s){
ff_mpeg4_init_direct_mv(s);
}else{
s->last_time_base= s->time_base;
s->time_base= s->time/s->avctx->time_base.den;
s->time_base= FFUDIV(s->time, s->avctx->time_base.den);
}
}
@ -895,11 +895,12 @@ static void mpeg4_encode_gop_header(MpegEncContext * s){
if(s->reordered_input_picture[1])
time= FFMIN(time, s->reordered_input_picture[1]->pts);
time= time*s->avctx->time_base.num;
s->last_time_base= FFUDIV(time, s->avctx->time_base.den);
seconds= time/s->avctx->time_base.den;
minutes= seconds/60; seconds %= 60;
hours= minutes/60; minutes %= 60;
hours%=24;
seconds= FFUDIV(time, s->avctx->time_base.den);
minutes= FFUDIV(seconds, 60); FFUMOD(seconds, 60);
hours = FFUDIV(minutes, 60); FFUMOD(minutes, 60);
hours = FFUMOD(hours , 24);
put_bits(&s->pb, 5, hours);
put_bits(&s->pb, 6, minutes);
@ -909,8 +910,6 @@ static void mpeg4_encode_gop_header(MpegEncContext * s){
put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP));
put_bits(&s->pb, 1, 0); //broken link == NO
s->last_time_base= time / s->avctx->time_base.den;
ff_mpeg4_stuffing(&s->pb);
}
@ -1083,9 +1082,8 @@ void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
assert(s->time>=0);
time_div= s->time/s->avctx->time_base.den;
time_mod= s->time%s->avctx->time_base.den;
time_div= FFUDIV(s->time, s->avctx->time_base.den);
time_mod= FFUMOD(s->time, s->avctx->time_base.den);
time_incr= time_div - s->last_time_base;
assert(time_incr >= 0);
while(time_incr--)