[FFmpeg-user] Vorbis/Ogg duration

dE . de.techno at gmail.com
Tue Jan 10 13:50:23 CET 2012


On 01/10/12 23:24, John Mucha wrote:
> U stop sent message
> On Jan 10, 2012 5:51 PM, "Austen McRae"<austen.mcrae at gmail.com>  wrote:
>
>> Hey all,
>>
>> I'm attempting to figure out if there is a header component of Vorbis (or
>> its container Ogg) that specifies the the audio duration.  My current make
>> of ffmpeg doesn't seem to place any type of duration information; when I
>> play it back using VLC it plays but the duration is 00:00, but I've been
>> able to find additional ogg vorbis files that do have a duration component
>> in VLC (which was exported from Quicktime).
>>
>> Looking at the Ogg source files shows that the OGGStreamContext doesn't
>> really have a duration option, but it looks like we could add it using an
>> OggComment?  I did attempt to add it using the -metadata tag, but VLC
>> didn't pick up "duration" or "length" produced unplayable files...
>>
>> Any additional knowledge as to how the duration is encoded would be great!
>>
>> Sincerely,
>>
>> Austen
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>>
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Fuckin shutup dude! You know what's a mailing list?


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