From: Clément Bœsch <[email protected]>
The old method doesn't work when moov is relocated to beginning of file
---
libavformat/movenc.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index c7536f5..e6adb58 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -83,15 +83,25 @@ static int64_t update_size(AVIOContext *pb, int64_t pos)
return curpos - pos;
}
+static int is_co64_required(const MOVTrack *track)
+{
+ int i;
+
+ for (i = 0; i < track->entry; i++) {
+ if (track->cluster[i].pos + track->data_offset > UINT32_MAX)
+ return 1;
+ }
+ return 0;
+}
+
/* Chunk offset atom */
static int mov_write_stco_tag(AVIOContext *pb, MOVTrack *track)
{
int i;
- int mode64 = 0; // use 32 bit size variant if possible
+ int mode64 = is_co64_required(track); // use 32 bit size variant if
possible
int64_t pos = avio_tell(pb);
avio_wb32(pb, 0); /* size */
- if (pos > UINT32_MAX) {
- mode64 = 1;
+ if (mode64) {
ffio_wfourcc(pb, "co64");
} else
ffio_wfourcc(pb, "stco");
--
1.8.3.1
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