[FFmpeg-devel] [PATCH] Make sure AVFormatContext->start_time is initialized after the first patch

[Martin Storsjö]

On Fri, 28 May 2010, Baptiste Coudurier wrote:

> On 05/25/2010 11:57 AM, Michael Niedermayer wrote:
> > On Tue, May 25, 2010 at 12:54:50AM +0300, Martin Storsj? wrote:
> > > Hi,
> > > 
> > > When discussing a ffserver patch with Baptiste, he insisted that if
> > > AVFormatContext->start_time isn't initialized after the first packet, it's
> > > a bug that should be fixed within libavformat, instead of handled in
> > > ffserver.
> > > 
> > > This attached patch is one way of solving it, although I'm not sure if
> > > this is the correct way.
> > 
> > The problem might be that ffserver calls av_seek_frame()
> > with that the first packet demuxed might no longer correspond to the
> > first packet.
> > thus i think its not unreasonable if lavf doesnt set start_time to the
> > first dts/pts once seeking has happened
> 
> Hummm, av_find_stream_info should set the start_time however.
> Isn't av_find_stream_info called ?

As far as I can see in open_input_stream, we first call 
av_find_stream_info, then a few lines later do av_seek_frame.

// Martin