Using mp4mux with faststart option produces empty file

[stic at free.fr]

Thanks. So I understand that I could use fragment-duration to have a "fragmented" output.
But if I can't have the headers to be written at the beginning of the stream, will it be still playable by VLC or other players that can read fragmented files ?
If the headers are mandatory, is there something that can produce a playable stream where headers are written with each fragment ?
Is that something similar to dash ?
And if dash looks like what I need, are there any usable elements in gstreamer to produces dash for a live content ?

Sorry for all the questions, but I need to understand and see more clearly what can be done.
Thank you very much !

----- Mail original -----
De: "Florian Zwoch" <fzwoch at gmail.com>
À: gstreamer-devel at lists.freedesktop.org
Envoyé: Mercredi 7 Janvier 2015 17:41:09
Objet: Re: Using mp4mux with faststart option produces empty file

> no, I am not sending yet EOS because this is a live content... I expected to get data into the output sink while the pipeline is running...
> I need this because I would like to be able to play the video while the pipeline is still running ?
> Is it possible ?

'faststart' will just make sure that the headers will be written to the beginning of the file. This allows to start playback while the file is partly loaded (HTTP streaming as an example). It does require a completed file though.

What you are looking for must be 'fragment-duration‘. This will write chunks of defined lengths (in time units) to the file. This file should already be playable while the pipeline continues to run. However note that some players do not support fragmented MP4 files. Afaik for example VLC does play it while QuickTime does not.

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