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fix references and nesting

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This commit is contained in:
Lesmiscore 2022-07-14 09:03:39 +09:00
parent cc17902c09
commit df63ae4477
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GPG key ID: 0EC2B52CF86236FF
2 changed files with 46 additions and 55 deletions
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3
yt_dlp/downloader/websocket.py
View file

@ -1,4 +1,5 @@
import contextlib
import os
import threading
import time
@ -84,7 +85,7 @@ def real_download(self, filename, info_dict):
except KeyboardInterrupt:
pass
finally:
self.ydl.replace(tempname, filename)
os.replace(tempname, filename)
return True

98
yt_dlp/postprocessor/mp4direct.py
View file

@ -1,3 +1,5 @@
import os
from math import inf
from .common import PostProcessor
@ -61,61 +63,49 @@ def analyze_mp4(self, filepath):
return smallest_bmdt, sdur_cutoff
@staticmethod
def transform(r, bmdt_offset, sdur_cutoff):
for btype, content in r:
if btype == 'tfdt':
version, _ = unpack_ver_flags(content[0:4])
if version == 0:
bmdt = unpack_be32(content[4:8])
else:
bmdt = unpack_be64(content[4:12])
if bmdt == 0:
yield (btype, content)
continue
# calculate new baseMediaDecodeTime
bmdt = max(0, bmdt - bmdt_offset)
# pack everything again and insert as a new box
if version == 0:
bmdt_b = pack_be32(bmdt)
else:
bmdt_b = pack_be64(bmdt)
yield ('tfdt', content[0:4] + bmdt_b + content[8 + version * 4:])
continue
elif btype == 'tfhd':
version, flags = unpack_ver_flags(content[0:4])
if not flags & 0x08:
yield (btype, content)
continue
sdur_start = 8
if flags & 0x01:
sdur_start += 8
if flags & 0x02:
sdur_start += 4
sample_dur = unpack_be32(content[sdur_start:sdur_start + 4])
if sample_dur > sdur_cutoff:
sample_dur = 0
sd_b = pack_be32(sample_dur)
yield ('tfhd', content[:sdur_start] + sd_b + content[sdur_start + 4:])
continue
yield (btype, content)
def modify_mp4(self, src, dst, bmdt_offset, sdur_cutoff):
with open(src, 'rb') as r, open(dst, 'wb') as w:
def converter():
moov_over, in_secondary_moov = False, False
for btype, content in parse_mp4_boxes(r):
# skip duplicate MOOV boxes
if btype == 'moov':
if moov_over:
in_secondary_moov = True
continue
elif btype is None and content == 'moov':
in_secondary_moov = False
if moov_over:
continue
moov_over = True
elif in_secondary_moov:
continue
if btype == 'tfdt':
version, _ = unpack_ver_flags(content[0:4])
if version == 0:
bmdt = unpack_be32(content[4:8])
else:
bmdt = unpack_be64(content[4:12])
if bmdt == 0:
yield (btype, content)
continue
# calculate new baseMediaDecodeTime
bmdt = max(0, bmdt - bmdt_offset)
# pack everything again and insert as a new box
if version == 0:
bmdt_b = pack_be32(bmdt)
else:
bmdt_b = pack_be64(bmdt)
yield ('tfdt', content[0:4] + bmdt_b + content[8 + version * 4:])
continue
elif btype == 'tfhd':
version, flags = unpack_ver_flags(content[0:4])
if not flags & 0x08:
yield (btype, content)
continue
sdur_start = 8
if flags & 0x01:
sdur_start += 8
if flags & 0x02:
sdur_start += 4
sample_dur = unpack_be32(content[sdur_start:sdur_start + 4])
if sample_dur > sdur_cutoff:
sample_dur = 0
sd_b = pack_be32(sample_dur)
yield ('tfhd', content[:sdur_start] + sd_b + content[sdur_start + 4:])
continue
yield (btype, content)
write_mp4_boxes(w, converter())
write_mp4_boxes(w, self.transform(parse_mp4_boxes(r)))
def run(self, information):
filename = information['filepath']
@ -137,6 +127,6 @@ def run(self, information):
else:
self.report_warning(f'Failed to fix duration of the file. (baseMediaDecodeTime offset = {bmdt_offset}, sample duration cutoff = {sdur_cutoff})')
self._downloader.replace(temp_filename, filename)
os.replace(temp_filename, filename)
return [], information