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[pp/embedthumbnail] Fix postprocessor (#10248)

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* [compat] Improve `imghdr.what` detection
* [pp/embedthumbnail] Improve imghdr fail message
* [pp/embedthumbnail] Fix AtomicParsley error handling

Authored by: Grub4K
This commit is contained in:
Simon Sawicki 2024-06-27 16:12:19 +02:00 committed by GitHub
parent 0953209a85
commit f2a4ea1794
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GPG Key ID: B5690EEEBB952194
2 changed files with 29 additions and 15 deletions
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26
yt_dlp/compat/imghdr.py
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@ -1,16 +1,22 @@
tests = {
'webp': lambda h: h[0:4] == b'RIFF' and h[8:] == b'WEBP',
'png': lambda h: h[:8] == b'\211PNG\r\n\032\n',
'jpeg': lambda h: h[6:10] in (b'JFIF', b'Exif'),
'gif': lambda h: h[:6] in (b'GIF87a', b'GIF89a'),
}
def what(file=None, h=None):
"""Detect format of image (Currently supports jpeg, png, webp, gif only)
Ref: https://github.com/python/cpython/blob/3.10/Lib/imghdr.py
Ref: https://github.com/python/cpython/blob/3.11/Lib/imghdr.py
Ref: https://www.w3.org/Graphics/JPEG/itu-t81.pdf
"""
if h is None:
with open(file, 'rb') as f:
h = f.read(12)
return next((type_ for type_, test in tests.items() if test(h)), None)
if h.startswith(b'RIFF') and h.startswith(b'WEBP', 8):
return 'webp'
if h.startswith(b'\x89PNG'):
return 'png'
if h.startswith(b'\xFF\xD8\xFF'):
return 'jpeg'
if h.startswith(b'GIF'):
return 'gif'
return None

18
yt_dlp/postprocessor/embedthumbnail.py
View File

@ -119,14 +119,21 @@ def run(self, info):
if not mutagen or prefer_atomicparsley:
success = False
else:
self._report_run('mutagen', filename)
f = {'jpeg': MP4Cover.FORMAT_JPEG, 'png': MP4Cover.FORMAT_PNG}
try:
self._report_run('mutagen', filename)
with open(thumbnail_filename, 'rb') as thumbfile:
thumb_data = thumbfile.read()
type_ = imghdr.what(h=thumb_data)
if not type_:
raise ValueError('could not determine image type')
elif type_ not in f:
raise ValueError(f'incompatible image type: {type_}')
meta = MP4(filename)
# NOTE: the 'covr' atom is a non-standard MPEG-4 atom,
# Apple iTunes 'M4A' files include the 'moov.udta.meta.ilst' atom.
f = {'jpeg': MP4Cover.FORMAT_JPEG, 'png': MP4Cover.FORMAT_PNG}[imghdr.what(thumbnail_filename)]
with open(thumbnail_filename, 'rb') as thumbfile:
thumb_data = thumbfile.read()
meta.tags['covr'] = [MP4Cover(data=thumb_data, imageformat=f)]
meta.save()
temp_filename = filename
@ -160,9 +167,10 @@ def run(self, info):
stdout, stderr, returncode = Popen.run(cmd, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if returncode:
self.report_warning(f'Unable to embed thumbnails using AtomicParsley; {stderr.strip()}')
success = False
# for formats that don't support thumbnails (like 3gp) AtomicParsley
# won't create to the temporary file
if 'No changes' in stdout:
elif 'No changes' in stdout:
self.report_warning('The file format doesn\'t support embedding a thumbnail')
success = False