[FFmpeg-user] [FFmpeg-devel] Fwd: ffmpeg live streaming

Kamal Bijlani kamal1008 at gmail.com
Fri Mar 18 08:02:31 CET 2016

Hi Reuben,
thanks for your advice..
would you be able to consult with us on some of these issues? and/or can
you recommend someone for improving h.264 encoding for adobe/red5
streaming.. thanks.. Kamal

On Fri, Mar 18, 2016 at 10:31 AM, Reuben Martin <reuben.m at gmail.com> wrote:

> On Friday, March 18, 2016 12:52:17 AM Kamal Bijlani wrote (to the developer
> list:
> > Hello ffmpeg developer,
> This isn’t really the type of topic for the developer mailing list, you
> probably won’t get much a response to this sort of question there. The
> ffmpeg-
> users mailing list is more appropriate for this.
> > We are currently using Adobe Media Server and Red5 for streaming, Adobe
> > Flex and encoding h.264. Now, we would like to improve audio/video
> quality,
> > and have multi-bit rate with low latency.
> >
> > If possible, we would like to consult with you. Here are some issues:
> > 1. our existing audio/video in h.264 adobe flex RTMP encoding is
> pixelating
> > during movements.
> This has nothing to do with ffmpeg.
> > 2. when encoding with ffmpeg there is latency of 3 to 5 seconds . how to
> > reduce latency for live interactive sessions?
> This is normal. There are ways to reduce it, but at the expense of quality.
> For live interaction you would be best to use a DSP based hardware encoder
> decoders that can deliver <50ms encoding latency. (and solutions like are
> not
> cheap if high quality is desired) Ffmpeg, or more accurately libx264, is
> just
> not designed with that type of low latency as it’s primary goal.
> > 3. we are having some issues when we use the AAC audio and 2 audio
> inputs.
> > For AAC audio we get more latency. For 2 audio inputs, it seems to get
> > unstable.
> >
> If audio is sourced from a device separate from the video device (i.e.
> They do
> not share the same hardware clock) they will suffer from clock drift which
> increases latency and causes other problems.
> > We would like to phone/skype/talk with you immediately, and get some
> help.
> > We would like to know your rates. thanks.
> > Warm Regards,
> > Kamal, Sukanya, Raji

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