You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
2.0 KiB
66 lines
2.0 KiB
5 years ago
|
#!/usr/bin/env python
|
||
|
|
# Copyright (c) 2016, Comma.ai, Inc.
|
||
|
|
|
||
|
|
import re
|
||
|
|
import binascii
|
||
|
|
|
||
|
|
from tools.lib.mkvparse import mkvparse
|
||
|
|
from tools.lib.mkvparse import mkvgen
|
||
|
|
from tools.lib.mkvparse.mkvgen import ben, ebml_element, ebml_encode_number
|
||
|
|
|
||
|
|
class MatroskaIndex(mkvparse.MatroskaHandler):
|
||
|
|
# def __init__(self, banlist, nocluster_mode):
|
||
|
|
# pass
|
||
|
|
def __init__(self):
|
||
|
|
self.frameindex = []
|
||
|
|
|
||
|
|
def tracks_available(self):
|
||
|
|
_, self.config_record = self.tracks[1]['CodecPrivate']
|
||
|
|
|
||
|
|
def frame(self, track_id, timestamp, pos, length, more_laced_frames, duration,
|
||
|
|
keyframe, invisible, discardable):
|
||
|
|
self.frameindex.append((pos, length, keyframe))
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
def mkvindex(f):
|
||
|
|
handler = MatroskaIndex()
|
||
|
|
mkvparse.mkvparse(f, handler)
|
||
|
|
return handler.config_record, handler.frameindex
|
||
|
|
|
||
|
|
|
||
|
|
def simple_gen(of, config_record, w, h, framedata):
|
||
|
|
mkvgen.write_ebml_header(of, "matroska", 2, 2)
|
||
|
|
mkvgen.write_infinite_segment_header(of)
|
||
|
|
|
||
|
|
of.write(ebml_element(0x1654AE6B, "" # Tracks
|
||
|
|
+ ebml_element(0xAE, "" # TrackEntry
|
||
|
|
+ ebml_element(0xD7, ben(1)) # TrackNumber
|
||
|
|
+ ebml_element(0x73C5, ben(1)) # TrackUID
|
||
|
|
+ ebml_element(0x83, ben(1)) # TrackType = video track
|
||
|
|
+ ebml_element(0x86, "V_MS/VFW/FOURCC") # CodecID
|
||
|
|
+ ebml_element(0xE0, "" # Video
|
||
|
|
+ ebml_element(0xB0, ben(w)) # PixelWidth
|
||
|
|
+ ebml_element(0xBA, ben(h)) # PixelHeight
|
||
|
|
)
|
||
|
|
+ ebml_element(0x63A2, config_record) # CodecPrivate (ffv1 configuration record)
|
||
|
|
)
|
||
|
|
))
|
||
|
|
|
||
|
|
blocks = []
|
||
|
|
for fd in framedata:
|
||
|
|
blocks.append(
|
||
|
|
ebml_element(0xA3, "" # SimpleBlock
|
||
|
|
+ ebml_encode_number(1) # track number
|
||
|
|
+ chr(0x00) + chr(0x00) # timecode, relative to Cluster timecode, sint16, in milliseconds
|
||
|
|
+ chr(0x80) # flags (keyframe)
|
||
|
|
+ fd
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
of.write(ebml_element(0x1F43B675, "" # Cluster
|
||
|
|
+ ebml_element(0xE7, ben(0)) # TimeCode, uint, milliseconds
|
||
|
|
# + ebml_element(0xA7, ben(0)) # Position, uint
|
||
|
|
+ ''.join(blocks)))
|
||
|
|
|