[Libav-user] MOOV Atom Not Found

Cary Tetrick ctetrick at newtek.com
Wed Sep 5 17:13:51 CEST 2012

On 9/5/2012 6:19 AM, Robert Krüger wrote:
> On Wed, Sep 5, 2012 at 11:23 AM, Tomas Härdin <tomas.hardin at codemill.se> wrote:
>> On Thu, 2012-08-30 at 08:41 +0100, Mark Kenna wrote:
>>> On 30 Aug 2012, at 01:10, Jan Ehrhardt <phpdev at ehrhardt.nl> wrote:
>>>> Mark Kenna in gmane.comp.video.ffmpeg.libav.user (Wed, 29 Aug 2012
>>>> 21:31:24 +0100):
>>>>> But for that you would have to have encoded the entire file before
>>>>> streaming right? I need to stream as I'm encoding so there will never
>>>>> be a physical file.
>>>> qt-faststart, mp4box -inter nnn and mp4creator -optimize all do more or
>>>> less the same on transcoded files. You might take a look at
>>>> http://stackoverflow.com/questions/8616855/how-to-output-fragmented-mp4-with-ffmpeg/9734251#9734251
>>> Surely all these tools require a pre-encoded file as input? I would
>>> need to do it on the fly so the moon atom would have to exist just
>>> after the write header stage.
>> You need to mux fragmented mp4, which ffmpeg does not support. Try using
> It doesn't? Could you elaborate?
Fragmented MP4 writes multiple MOOF atoms rather than a single MOOV atom.
(This is the underlying format used in Adobe's .f4v files for example.)
I've never seen any support for this in ffmpeg. It simply doesn't 
support it.

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