Andriy Gelman: > Hello, > > I've been working with HEVC + mpegts at low bitrates 10-20kbps. > > At these bitrates, mpegts can create a substantial overhead due > to the 188 byte frame size (i.e. a NAL unit of 200 bytes will get > rounded up to 376 bytes). > > I've tried to get around this by concatenating multiple NAL units into a > single > call to av_write_frame. > > This seems to work; the parser in av_read_frame outputs separate NAL > units. The only issue is that only the first NAL unit of the super packet has > the correct time stamp. The subsequent timestamps are AV_NOPTS_VALUE. > > Would it be of interest to community for me to: > 1. Fix the AV_NOPTS_VALUE issue > 2. Add option to concatenate multiple NAL units in single call to > av_write_frame > Fixing 1. would be very desirable, not only for HEVC, but for other codecs as well. E.g. #6903 is about the H.264 analogue of this where remuxing fails because the a PES packet contained two separately coded fields the second of which lacked timestamps.
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