[FFmpeg-user] HTML5 live streaming

[Ricardo Kleemann]

On Wed, Apr 24, 2013 at 9:35 AM, Tom Evans <tevans.uk at googlemail.com> wrote:

> On Wed, Apr 24, 2013 at 4:54 PM, Ricardo Kleemann
> <ricardo at americasnet.com> wrote:
> >
> > I appreciate your help, Jonathan. Thank you
> >
> > Would you know where I can find the optimal ffmpeg transcoder settings
> for
> > each of iPad, iPhone, Android Phone and Android Tablet?
> >
>
> Each version of iphone and ipad have supported different versions of
> H264. For instance, the current ipad supports H264 1080p30 High
> Profile Level 4.1 (plus a bunch of other caveats) where as the
> original ipad support H264 720p30 Main Profile Level 3.1 (plus a bunch
> of other caveats).
>
> What each android device supports depends upon that specific device as
> well.
>
> If you want to target all mobile devices, stick to 720p or less, level
> 3.0, baseline profile, set a target bitrate and a maximum bitrate. The
> times when you will have problems is when the video is too high a
> bitrate for a specific device, or it uses features that device does
> not support. This may not happen immediately a video starts, it may
> happen just at a specific point.
>
> I don't know what settings are applicable generically, but this is
> what I use to transcode for my ipad (v1):
>
> -c:v libx264 -profile:v baseline -level 30 -maxrate 10000000 -b 1200k
>
> which WFM.
>
> Cheers
>
> Tom
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>
Thanks Tom.

Here's one interesting link I found:

https://develop.participatoryculture.org/index.php/ConversionMatrix

One related question, how would I have ffmpeg transcode to multiple outputs?

Ricardo