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m4af: fix mvhd/tkhd duration 

According to 14496-12, duration of mvhd/tkhd shall be the sum of
duration of edits
This commit is contained in:
nu774 2021-04-23 22:53:46 +09:00
parent fdf5c2f251
commit 9d65d3b3bf
1 changed files with 6 additions and 2 deletions
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8
src/m4af.c
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@ -1103,8 +1103,10 @@ void m4af_write_tkhd_box(m4af_ctx_t *ctx, uint32_t track_idx)
{
m4af_track_t *track = &ctx->track[track_idx];
int64_t pos = m4af_tell(ctx);
int64_t duration =
(double)track->duration / track->timescale * ctx->timescale + .5;
int64_t duration = track->duration;
if (ctx->priming_mode & M4AF_PRIMING_MODE_EDTS)
duration -= (track->encoder_delay + track->padding);
duration = (double)duration / track->timescale * ctx->timescale + .5;
uint8_t version = (track->creation_time > UINT32_MAX ||
track->modification_time > UINT32_MAX ||
duration > UINT32_MAX);
@ -1169,6 +1171,8 @@ int64_t m4af_movie_duration(m4af_ctx_t *ctx)
unsigned i;
for (i = 0; i < ctx->num_tracks; ++i) {
double x = ctx->track[i].duration;
if (ctx->priming_mode & M4AF_PRIMING_MODE_EDTS)
x -= (ctx->track[i].encoder_delay + ctx->track[i].padding);
int64_t duration = x / ctx->track[i].timescale * ctx->timescale + .5;
if (duration > movie_duration)
movie_duration = duration;