[FFmpeg-devel] [PATCH] RTMP: Return from rtmp_read as soon as some data is available

Martin Storsjö martin
Fri Jun 18 13:42:58 CEST 2010

On Fri, 18 Jun 2010, Kostya wrote:

> On Fri, Jun 18, 2010 at 02:31:06PM +0300, Martin Storsj? wrote:
> > Hi,
> > 
> > This changes rtmp_read to return as soon as some data is available, 
> > instead of returning only when the whole request buffer is filled. The 
> > earlier behaviour lead to high latency when receiving low-bandwidth 
> > streams.
> Arbetar det med FFmpeg FLV demuxer? Kanske bra.

Jo, den fungerar fint med libavformats flv demuxer. :-)

It's all wrapped in an ByteIOContext for the demuxers anyway, and accessed 
through fill_buffer() (which is allowed to return as soon as it has read 
at least one byte as far as I understand it) or get_buffer() which loops 
until it has got as much data as it needs. The problem it fixes is that 
fill_buffer requests a 32k buffer, which blocks for way too long when the 
packets themselves are much shorter.

// Martin

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