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avformat/flvenc: avoid 24bit timestamp truncation for FLV metadata 

FLV AMF tags have a 24bit field for timestamps plus an 8bit for extended
timestamps.

All FLV AMF tags except when we write metadata handle this correctly
using the put_timestamp function.

Until now when writing metadata we were only using the first
24 bits and thus the timestamp value was wraping around 4 hours 40
minutes (16,800,000 ms, max 24 bit value 16,777,216) of playback.

This commit fixes this applying this same function put_timestamp
for the metadata FLV tag.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
asilvestre 2021-11-26 17:27:18 +01:00 committed by Marton Balint
parent 3809467d4d
commit 1c2dae153c
1 changed files with 2 additions and 2 deletions
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4
libavformat/flvenc.c
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@ -284,8 +284,8 @@ static void write_metadata(AVFormatContext *s, unsigned int ts)
avio_w8(pb, FLV_TAG_TYPE_META); // tag type META
flv->metadata_size_pos = avio_tell(pb);
avio_wb24(pb, 0); // size of data part (sum of all parts below)
avio_wb24(pb, ts); // timestamp
avio_wb32(pb, 0); // reserved
put_timestamp(pb, ts); // timestamp
avio_wb24(pb, 0); // reserved
/* now data of data_size size */