On 2/18/20 9:43 PM, James Almer wrote: > Signed-off-by: James Almer <jamr...@gmail.com> > --- > libavformat/dashenc.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c > index b910cc22d0..045d2f4df6 100644 > --- a/libavformat/dashenc.c > +++ b/libavformat/dashenc.c > @@ -1395,6 +1395,11 @@ static int dash_init(AVFormatContext *s) > c->frag_type = FRAG_TYPE_EVERY_FRAME; > } > > + if (c->ldash && !c->write_prft) { > + av_log(s, AV_LOG_INFO, "Enabling Producer Reference Time element for > Low Latency mode\n"); > + c->write_prft = 1; > + } > + PRFT elements has a significant bitrate overhead, especially in streaming mode when each frame is a moof fragment. In terms of percentage of stream's bitrate this overhead will be a significant % for lower bitrate streams(such as audio streams). For any application which does not need PRFT this is an unnecessary wastage of bits. Hence, I would advise against enabling PRFT without user control.
> if (c->write_prft && !c->utc_timing_url) { > av_log(s, AV_LOG_WARNING, "Producer Reference Time element option > will be ignored as utc_timing_url is not set\n"); > c->write_prft = 0; _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".