Author vstinner
Recipients Neil Muller, andersjm, belopolsky, davidfraser, hodgestar, tebeka, vstinner, werneck
Date 2008-11-24.16:00:39
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Message-id <1227542440.99.0.0648873880972.issue2736@psf.upfronthosting.co.za>
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Content
Timedelta formats:

(a) Win64: 64 bits unsigned integer, number of 1/10 microsecond
 - file format: Microsoft Word document (.doc), ASF video (.asf)

(b) 64 bits float, number of seconds
 - file format: AMF metadata used in Flash video (.flv)

Other file formats use multiple numbers to store a duration:

[AVI video]
 - 3 integers (32 bits unsigned): length, rate, scale
 - seconds = length / (rate / scale) 
 - (seconds = length * scale / rate)

[WAV audio]
 - 2 integers (32 bits unsigned): us_per_frame, total_frame
 - seconds = total_frame * (1000000 / us_per_frame)

[Ogg Vorbis]
 - 2 integers: sample_rate (32 bits unsigned), position (64 bits 
unsigned)
 - seconds = position / sample_rate
History
Date User Action Args
2008-11-24 16:00:41vstinnersetrecipients: + vstinner, tebeka, davidfraser, belopolsky, andersjm, werneck, hodgestar, Neil Muller
2008-11-24 16:00:40vstinnersetmessageid: <1227542440.99.0.0648873880972.issue2736@psf.upfronthosting.co.za>
2008-11-24 16:00:40vstinnerlinkissue2736 messages
2008-11-24 16:00:39vstinnercreate