[K12OSN] Streaming video

[Brian Chivers]

Dan Young wrote:
> On Tue, Jan 27, 2009 at 11:16 AM, Brian Chivers
> <brian at portsmouth-college.ac.uk> wrote:
>   
>> Dan Young wrote:
>>     
>>> On Mon, Jan 26, 2009 at 11:45 AM, Brian Chivers
>>> <brian at portsmouth-college.ac.uk> wrote:
>>>
>>>       
>>>> Gavin Spurgeon wrote:
>>>>
>>>>         
>>>>>> I've looked @ VLC and have it sort of working but the embedding into a
>>>>>> page is causing problems. I don't really want them to have to download
>>>>>> the
>>>>>> whole program before it starts as happens if you just embed the file
>>>>>> into a
>>>>>> webpage.
>>>>>>
>>>>>>
>>>>>>             
>>>>> You might want to look @ something like http://flowplayer.org/
>>>>>
>>>>> It is basically the same type of technology used by YouTube and the
>>>>> like..
>>>>>
>>>>> Lets you have the Files on your www server and then just uses flash to
>>>>> stream them to the client...
>>>>>
>>>>>           
>>>> That was my line of thought but I couldn't get the files to convert very
>>>> well to flash video that will run full screen on a 42" TFT .  If anyone
>>>> has
>>>> managed this with ffmpeg I'd be VERY please to hear about it :-)
>>>>
>>>>         
>>> I did this for the Inauguration:
>>> http://wiki.videolan.org/Flash_Video
>>>
>>> I streamed to the JW FLV Player applet, though I probably would have
>>> used FlowPlayer had I known about it. Worked great; VLC transcoded a
>>> live over-the-air broadcast to FLV1/mp3 and served up 100 streams
>>> without breaking a sweat.
>>>       
>> I did think of that but couldn't get the files to high enough quality for
>> fullscreen use. I'm looking a unreal server @ the mo & it's looking good :-)
>>     
>
> Cutting the frame rate in half (15fps) with "sout-transcode-fps" let
> us keep the bitrate lower while getting passable image detail. Play
> with that and the bitrate "sout-transcode-vb" until you get what
> you're looking for.
>
> I was a bit disappointed that VLC couldn't transcode to a h.264 Flash
> stream, because the quality was significantly better than FLV1. FLV
> was acceptable given our constraints and really didn't look too bad if
> you take a few steps back from the monitor.
>
> --
> Dan Young <dyoung at mesd.k12.or.us>
> Multnomah ESD - Technology Services
> 503-257-1562
>
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>   
I've been playing with ffmpeg to convert the files to flv's as I'm using 
a windows box to do the recording and it records .ts files. I'll have to 
see what I can do with that for h264 flash files. Guess it might be yet 
another read of the ffmpeg man page :-)

Brian

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                the views of Portsmouth College