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A
Anonymous
August 22, 2009
Question

F4V duration limit?

  • August 22, 2009
  • 1 reply
  • 732 views

I just found out that ALL of the f4v files that I created (either with FMLE3 or with adobe premiere) somehow have a duration limit of 4294 seconds.  All videos with duration less than 4294 seconds play back fine.  For those above it, they play back ok on the local machine but when streamed from an FMS, the reported total duration is 13 hours+!  And if you ignore the total time error and keep playing back the files, they all stop at the magical 4294 seconds.  I have tried putting them onto different FMS servers and they all behave the same.  It is also not a problem with my code because I've used different client-side apps to view them.  Is anyone else experiencing the same problem?  I'm surprised that I haven't read about it because 4294 seconds is just 1.2 hours, which is a relatively short duration and its failure should have alarmed most.  Can someone shine some light onto it please?

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    1 reply

    D
    Daniil_Churikov
    Participant
    May 31, 2011

    hey, possible it is dead topic, but as i read in F4V specification - duration is UI32 field, this means that 2^32 = 4294967296 in in TimeScale units. In your case it is 4294 seconds. As this specification define, you could extend this value by setting Version=1 for this box, which contain this video and you will get UI64 size. Possible it is mvhd box. Hope was helpful for other who randomly google it %)

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