[Libav-user] MOOV Atom Not Found

Robert Krüger krueger at lesspain.de
Thu Sep 6 10:23:08 CEST 2012

On Wed, Sep 5, 2012 at 5:13 PM, Cary Tetrick <ctetrick at newtek.com> wrote:
> 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.

I know what fragmented MP4 is and I have created it using ffmpeg

see http://ffmpeg.org/ffmpeg.html#MOV_002fMP4_002fISMV

My question was rather meant like "is there some non-obvious thing
that ffmpeg does not support regarding fragmented mp4"

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