[FFmpeg-user] drawtext filter use with stream output?

Raghu Ram iamanonymouscoward at gmail.com
Sun Sep 15 21:44:44 CEST 2013

This might help. Apparently, there is a workaround. But I am not able to
get it up and running.


Btw, if you come across a solution for this problem (not necessarily ffmpeg
based), please do let me know.

On Mon, Sep 9, 2013 at 1:02 PM, Alex Morris <axman.5389 at gmail.com> wrote:

> >> Output of flv to a stream appears to process 3
> >> frames, then stops silently.
> >
> > Does it work if you remove the drawtext filter?
> > Does it work if you use file input?
> > (That would allow me to test.)
> > If audio doesn't work (and isn't needed to
> > reproduce the problem, please remove it.
> >
> My results are a bit different than Raghu's.  Audio input and audio
> output parameters were removed.
> File input -> file output with and without drawtext works perfectly.
> h264:mp4 and flv tested.
> File input -> stream output with and without drawtext fails.  In the
> case with drawtext, ffmpeg dies after starting to transcode first
> frame.  In the case without drawtext, some wierd debug output..  h264
> and flv both behave strangely.  Investigating more.
> v4L capture -> file output with and without drawtext works perfectly using
> flv.
> v4L capture -> file output with drawtext does not work using x264:mp4.
>  MOOV atom not found.  for this command, I am using -movflags
> "+faststart", but I suspect that killing the ffmpeg process (instead
> of pressing q ) may probably the reason for this.  Thanks Carl for
> previous post on this topic.
> Seems as though the streaming output is broken for me.  Happy to help
> with testing or trying different configurations, any suggestions are
> appreciated.
> alex
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