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mov: Fix start_time for streams with empty edits in the middle

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Empty edits can occur at any position within the edit list except for at
the end. Empty edits in the middle should not impact the reported stream
start_time or the video PTS adjustment, so only include empty edits at
the start of the list in empty_edits_sum_duration.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
This commit is contained in:
Justin Ruggles 2019-02-22 17:21:00 -05:00 committed by Vittorio Giovara
parent 69fcc093c1
commit 97f47fd601
1 changed files with 3 additions and 1 deletions
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4
libavformat/mov.c
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@ -3446,6 +3446,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
MOVIndexRange *current_index_range;
int i;
int found_keyframe_after_edit = 0;
int found_non_empty_edit = 0;
if (!msc->elst_data || msc->elst_count <= 0 || nb_old <= 0) {
return;
@ -3492,10 +3493,11 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
edit_list_dts_counter = edit_list_dts_entry_end;
edit_list_dts_entry_end += edit_list_duration;
num_discarded_begin = 0;
if (edit_list_media_time == -1) {
if (!found_non_empty_edit && edit_list_media_time == -1) {
empty_edits_sum_duration += edit_list_duration;
continue;
}
found_non_empty_edit = 1;
// If we encounter a non-negative edit list reset the skip_samples/start_pad fields and set them
// according to the edit list below.