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[downloader/ism] Support muxing TTML subtitles
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parent
15828bcf25
commit
66a1b8643a
@ -118,8 +118,7 @@ def write_piff_header(stream, params):
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vmhd_payload += u16.pack(0) * 3 # opcolor
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media_header_box = full_box(b'vmhd', 0, 1, vmhd_payload) # Video Media Header
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elif stream_type == 'text':
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sthd_payload = u16.pack(0) * 2
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media_header_box = full_box(b'sthd', 0, 1, sthd_payload) # Subtitle Media Header
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media_header_box = full_box(b'sthd', 0, 0, b'') # Subtitle Media Header
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else:
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assert False
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minf_payload = media_header_box
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@ -173,6 +172,14 @@ def write_piff_header(stream, params):
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sample_entry_box = box(b'avc1', sample_entry_payload) # AVC Simple Entry
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else:
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assert False
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elif stream_type == 'text':
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if fourcc == 'TTML':
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sample_entry_payload += b'http://www.w3.org/ns/ttml\0' # namespace
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sample_entry_payload += b'\0' # schema location
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sample_entry_payload += b'\0' # auxilary mime types(??)
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sample_entry_box = box(b'stpp', sample_entry_payload)
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else:
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assert False
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else:
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assert False
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stsd_payload += sample_entry_box
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@ -2816,7 +2816,7 @@ def _parse_ism_formats_and_subtitles(self, ism_doc, ism_url, ism_id=None):
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for track in stream.findall('QualityLevel'):
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fourcc = track.get('FourCC', 'AACL' if track.get('AudioTag') == '255' else None)
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# TODO: add support for WVC1 and WMAP
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if fourcc not in ('H264', 'AVC1', 'AACL'):
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if fourcc not in ('H264', 'AVC1', 'AACL', 'TTML'):
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self.report_warning('%s is not a supported codec' % fourcc)
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continue
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tbr = int(track.attrib['Bitrate']) // 1000
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