[Libav-user] How to determine frame sizes in msec

Yurii Monakov monakov.y at gmail.com
Thu Oct 4 11:05:23 EEST 2018

Bob, you can convert timestamps to any time base with av_rescale_q function:

AVRational ms_time_base = { 1, 1000 };

/* assuming that you've just got packet from demuxer */
int64_t time_ms = av_rescale_q(packet.pts, stream.time_base, ms_time_base);


ср, 3 окт. 2018 г. в 13:56, Bob Kirnum <bkirnum at gmail.com>:

> Thanks Yuri.  The problem is with consistency.  I tried using the AVPacket
> dts and duration values.  These proved to me more consistent until I played
> an MP4 file.  For MKV and WebM, the values were in msec.  For MP4, the
> values were not.  Looking at the AVStream time_base values, they were
> 1/16000 for both audio and video streams.
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