I need the ability to derive the poster time found in the mvhd, so I can
use that value to create a thumbnail from ffmpeg. More details can be
found here
https://www.mail-archive.com/ffmpeg-user@ffmpeg.org/msg30003.html
Signed-off-by: Bryce Chester Newman <bryce.new...@gettyimages.com>
---
libavformat/mov.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 1437d160f8..c4fe8ad996 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1487,6 +1487,7 @@ static int mov_read_mvhd(MOVContext *c, AVIOContext *pb,
MOVAtom atom)
{
int i;
int64_t creation_time;
+ int32_t poster_time;
int version = avio_r8(pb); /* version */
avio_rb24(pb); /* flags */
@@ -1525,12 +1526,21 @@ static int mov_read_mvhd(MOVContext *c, AVIOContext
*pb, MOVAtom atom)
avio_rb32(pb); /* preview time */
avio_rb32(pb); /* preview duration */
- avio_rb32(pb); /* poster time */
+ poster_time = avio_rb32(pb); /* poster time */
avio_rb32(pb); /* selection time */
avio_rb32(pb); /* selection duration */
avio_rb32(pb); /* current time */
avio_rb32(pb); /* next track ID */
+ av_log(c->fc, AV_LOG_TRACE, "poster_time = %i, time_scale = %i\n",
poster_time, c->time_scale);
+ if(poster_time && c->time_scale && c->time_scale > 0) {
+ char buffer[32];
+ float poster_time_location = (float)poster_time / c->time_scale;
+ snprintf(buffer, sizeof(buffer), "%.2f", poster_time_location);
+ /* This will appear as a TAG in the format section of FFProbe output
using -show_format */
+ av_dict_set(&c->fc->metadata, "poster_time", buffer, 0);
+ }
+
return 0;
}
--
2.34.1
Bryce Chester Newman | Principal Developer
p: +12069255045 |
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