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vstinner / hachoir

Hachoir is a Python library to view and edit a binary stream field by field
http://hachoir.readthedocs.io/
GNU General Public License v2.0
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hachoir-metadata parses and outputs incorrect duration metadata for ogv files #51

Open Bobloblaw74329479279 opened 4 years ago

Bobloblaw74329479279 commented 4 years ago

For some reason, hachoir-metadata has been producing bad duration output for ogv files. I've been testing with the "Computer Chronicles" collection on archive.org. To reproduce:

wget https://archive.org/download/CC517_commodore_64/CC517_commodore_64.ogv
from hachoir import parser as hachoir_parser
from hachoir import metadata as hachoir_metadata

video_file = 'CC517_commodore_64.ogv'
parser = hachoir_parser.createParser(video_file,video_file)
hachoir_metadata.extractMetadata(parser).exportPlaintext()

['Common:', '- Title: Commodore 64', '- Duration: 1 min 14 sec 423 ms', '- Location: http://www.archive.org/details/CC517_commodore_64', '- Copyright: http://creativecommons.org/licenses/by-nc-nd/2.0/', '- Producer: Xiph.Org libTheora I 20081020 3 2 1', '- MIME type: video/theora', '- Endianness: Little endian', 'Video:', '- Image width: 400 pixels', '- Image height: 300 pixels', '- Pixel format: 4:2:0', '- Compression: Theora', '- Frame rate: 30.0 fps', '- Comment: Quality: 0', '- Format version: Theora version 3.2 (revision 1)', 'Audio:', '- Channel: stereo', '- Sample rate: 44.1 kHz', '- Compression: Vorbis', '- Format version: Vorbis version 0']

harchoir-metadata reports that the duration is 1 minute and 14 seconds, but if you open it up in VLC and watch it, it's actually 28 minutes and 31 seconds.

Using Python 3.8.2 and hachoir 3.1.1.

vstinner commented 4 years ago

I don't maintain Hachoir anymore. Would you like to work on a fix?