def make_mkvb(self):
import mcio_matroska
from mcio_matroska import MatroskaBuilder
tracks = self.find_subboxes('trak')
td_gcd = reduce(gcd, (t.get_sample_delta_gcd() for t in tracks))
ts_base = max(t.get_mdhd().time_scale for t in tracks)
dur = max(t.get_mdhd().get_dur() for t in tracks)
mvhd = self.find_subbox('mvhd')
dur = max(dur, mvhd.get_dur())
(tcs, elmult, _tcs_err) = MatroskaBuilder.tcs_from_secdiv(ts_base, td_gcd)
mb = MatroskaBuilder(tcs, dur)
for track in tracks:
mdhd = track.get_mdhd()
se = track.get_sample_entry()
htype = track.find_subbox(b'mdia').find_subbox(b'hdlr').handler_type
if (htype == self._HTYPE_VIDE):
ttype = mcio_matroska.TRACKTYPE_VIDEO
at_args = (se.width, se.height)
elif (htype == self._HTYPE_SOUN):
ttype = mcio_matroska.TRACKTYPE_AUDIO
at_args = (round(se.sample_rate), se.channel_count)
else:
continue
codec_id = se.get_codec()
ts_fact = (ts_base / mdhd.time_scale)
mcd = track._get_most_common_dur()
mb.add_track(track.get_sample_data(elmult*ts_fact, mcd), ttype, codec_id, se.get_codec_init_data(),
not (track.stts is None), default_dur=round(10**9*mcd/mdhd.time_scale), *at_args)
return mb
