|
|
|
@ -2156,10 +2156,19 @@ static int get_std_framerate(int i) |
|
|
|
|
* Old DivX and Xvid often have nonsense timebases like 1fps or 2fps. |
|
|
|
|
* MPEG-2 commonly misuses field repeat flags to store different framerates. |
|
|
|
|
* And there are "variable" fps files this needs to detect as well. */ |
|
|
|
|
static int tb_unreliable(AVCodecContext *c) |
|
|
|
|
static int tb_unreliable(AVFormatContext *ic, AVStream *st) |
|
|
|
|
{ |
|
|
|
|
if (c->time_base.den >= 101LL * c->time_base.num || |
|
|
|
|
c->time_base.den < 5LL * c->time_base.num || |
|
|
|
|
FFStream *const sti = ffstream(st); |
|
|
|
|
AVCodecContext *c = sti->avctx; |
|
|
|
|
AVRational time_base = c->framerate.num ? av_inv_q(av_mul_q(c->framerate, |
|
|
|
|
(AVRational){c->ticks_per_frame, 1})) |
|
|
|
|
/* NOHEADER check added to not break existing behavior */ |
|
|
|
|
: (((ic->ctx_flags & AVFMTCTX_NOHEADER) || |
|
|
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) ? (AVRational){0, 1} |
|
|
|
|
: st->time_base); |
|
|
|
|
|
|
|
|
|
if (time_base.den >= 101LL * time_base.num || |
|
|
|
|
time_base.den < 5LL * time_base.num || |
|
|
|
|
// c->codec_tag == AV_RL32("DIVX") ||
|
|
|
|
|
// c->codec_tag == AV_RL32("XVID") ||
|
|
|
|
|
c->codec_tag == AV_RL32("mp4v") || |
|
|
|
@ -2243,11 +2252,11 @@ void ff_rfps_calculate(AVFormatContext *ic) |
|
|
|
|
// the check for tb_unreliable() is not completely correct, since this is not about handling
|
|
|
|
|
// an unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
|
|
|
|
|
// ipmovie.c produces.
|
|
|
|
|
if (tb_unreliable(sti->avctx) && sti->info->duration_count > 15 && sti->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num && |
|
|
|
|
if (tb_unreliable(ic, st) && sti->info->duration_count > 15 && sti->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num && |
|
|
|
|
sti->info->duration_gcd < INT64_MAX / st->time_base.num) |
|
|
|
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * sti->info->duration_gcd, INT_MAX); |
|
|
|
|
if (sti->info->duration_count > 1 && !st->r_frame_rate.num |
|
|
|
|
&& tb_unreliable(sti->avctx)) { |
|
|
|
|
&& tb_unreliable(ic, st)) { |
|
|
|
|
int num = 0; |
|
|
|
|
double best_error = 0.01; |
|
|
|
|
AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base); |
|
|
|
@ -2459,14 +2468,6 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
|
|
|
|
FFStream *const sti = ffstream(st); |
|
|
|
|
AVCodecContext *const avctx = sti->avctx; |
|
|
|
|
|
|
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO || |
|
|
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
|
|
|
|
/* if (!st->time_base.num)
|
|
|
|
|
st->time_base = */ |
|
|
|
|
if (!avctx->time_base.num) |
|
|
|
|
avctx->time_base = st->time_base; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* check if the caller has overridden the codec id */ |
|
|
|
|
// only for the split stuff
|
|
|
|
|
if (!sti->parser && !(ic->flags & AVFMT_FLAG_NOPARSE) && sti->request_probe <= 0) { |
|
|
|
@ -2544,7 +2545,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
|
|
|
|
* the correct fps. */ |
|
|
|
|
if (av_q2d(st->time_base) > 0.0005) |
|
|
|
|
fps_analyze_framecount *= 2; |
|
|
|
|
if (!tb_unreliable(sti->avctx)) |
|
|
|
|
if (!tb_unreliable(ic, st)) |
|
|
|
|
fps_analyze_framecount = 0; |
|
|
|
|
if (ic->fps_probe_size >= 0) |
|
|
|
|
fps_analyze_framecount = ic->fps_probe_size; |
|
|
|
@ -2857,12 +2858,16 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
|
|
|
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
|
|
|
|
best_fps, 12 * 1001, INT_MAX); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
if (!st->r_frame_rate.num) { |
|
|
|
|
if ( avctx->time_base.den * (int64_t) st->time_base.num |
|
|
|
|
<= avctx->time_base.num * (uint64_t)avctx->ticks_per_frame * st->time_base.den) { |
|
|
|
|
AVRational time_base = avctx->framerate.num ? av_inv_q(av_mul_q(avctx->framerate, |
|
|
|
|
(AVRational){avctx->ticks_per_frame, 1})) |
|
|
|
|
/* NOHEADER check added to not break existing behavior */ |
|
|
|
|
: ((ic->ctx_flags & AVFMTCTX_NOHEADER) ? (AVRational){0, 1} |
|
|
|
|
: st->time_base); |
|
|
|
|
if ( time_base.den * (int64_t) st->time_base.num |
|
|
|
|
<= time_base.num * (uint64_t)avctx->ticks_per_frame * st->time_base.den) { |
|
|
|
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, |
|
|
|
|
avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX); |
|
|
|
|
time_base.den, (int64_t)time_base.num * avctx->ticks_per_frame, INT_MAX); |
|
|
|
|
} else { |
|
|
|
|
st->r_frame_rate.num = st->time_base.den; |
|
|
|
|
st->r_frame_rate.den = st->time_base.num; |
|
|
|
|