[FFmpeg-user] HTML5 live streaming

Tue Apr 30 02:59:08 CEST 2013

On Mon, Apr 22, 2013 at 9:19 PM, Ricardo Kleemann
<ricardo at americasnet.com> wrote:
> Hi Jonathan,
>
> This is awesome! It worked! :-)
>
> so my next step... how do I do adaptive bitrate? For example, I want to
> have a stream for iPad, a stream for iPhone, Android...

Found this link
<http://ffmpeg.org/trac/ffmpeg/wiki/Creating%20multiple%20outputs> on
streaming to multiple outputs. Here is a script that I am messing
around with that should do adaptive streaming.  I used variables to
simplify it a little. As always adjust to your needs.

----------->8-------------
#!/bin/bash
VIDSOURCE="$1"
RESOLUTION="854x480"
BITRATE1="800000"
BITRATE2="600000"
BITRATE3="400000"

AUDIO_OPTS="-c:a libfaac -b:a 160000 -ac 2"
VIDEO_OPTS1="-s $RESOLUTION -c:v libx264 -b:v $BITRATE1 -vprofile
baseline -preset medium -x264opts level=41"
VIDEO_OPTS2="-s $RESOLUTION -c:v libx264 -b:v $BITRATE2 -vprofile
baseline -preset medium -x264opts level=41"
VIDEO_OPTS3="-s $RESOLUTION -c:v libx264 -b:v $BITRATE3 -vprofile
baseline -preset medium -x264opts level=41"
OUTPUT_HLS="-hls_time 3 -hls_list_size 10 -hls_wrap 30 -start_number 1"

ffmpeg -i "$VIDSOURCE" -y -threads 4 \
       $AUDIO_OPTS $VIDEO_OPTS1 $OUTPUT_HLS stream_hi.m3u8 \
       $AUDIO_OPTS $VIDEO_OPTS2 $OUTPUT_HLS stream_med.m3u8 \
       $AUDIO_OPTS $VIDEO_OPTS3 $OUTPUT_HLS stream_low.m3u8

----------->8-------------

Add in a m3u8 playlist for the streams created in the script.
Something like this should work.
----------->8-------------
#EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=500000
stream_low.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=700000
stream_med.m3u8
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=900000
stream_hi.m3u8
----------->8-------------

And point you player/ browser to the m3u8 playlist.

HTH

Jonathan

> Another question... does m3u8 work for a desktop browser? I do I need an
> embedded player like JWPlayer for desktop?
>
> Thanks so much!
> Ricardo
>
> On Sun, Apr 21, 2013 at 9:30 PM, Jonathan Isom <jeisom at gmail.com> wrote:
>
>> On Sun, Apr 21, 2013 at 7:43 PM, Ricardo Kleemann
>> <ricardo at americasnet.com> wrote:
>> > That's great, I didn't realize it.
>> >
>> > I'm trying to convert the input to h.264 + AAC and output to the
>> segmenter
>> > but it's not working. Can you help me find the error in the command?
>> >
>> > ffmpeg -loglevel debug -threads 4 -i "rtmp://server1/live/livestream1"
>> > -i_qfactor 0.71 -qcomp 0.6 -qmin 10 -qmax 63 -qdiff 4 -trellis 0 -vcodec
>> > libx264 -s 480x270 -b:v 512k -b:a 56k -ar 22050 -map 0 -f segment
>> > -segment_time 10 -segment_list live.m3u8 -segment_list_flags +live
>> > live_%05d.ts
>> >
>>
>> Here is the command I use which works with my iPad 3rd Gen. I cd into
>> the directory that I want the files to load from on the server. My
>> case is "/var/www/localhost/htdocs/stream/" which is
>> "http://domain/stream/". You probably should lose all the extra
>> options. for realtime encoding add "-re" to the command. You will want
>> to change RESOLUTION BITRATE & VIDSOURCE to what you need. Also below
>> is an example html file.
>> This is with ffmpeg git from a week ago. notice the "-hls*" options
>> instead of -segment.* options.
>>
>> ffmpeg  -i VIDSOURCE -y  -c:v libx264 -b:v BITRATE -vprofile baseline
>> -preset medium -x264opts level=41 -threads 4 -s RESOLUTION -map 0:v
>> -map 0:a:0  -c:a libfaac -b:a 160000 -ac 2   -hls_time 10
>> -hls_list_size 6 -hls_wrap 18 -start_number 1 stream.m3u8
>>
>> index.htm:
>> <html>
>> <body>
>>    <video  height="531"  width="945" autoplay="autoplay"
>> controls="controls">
>>     <source src="stream.m3u8" />
>>    </video>
>> </body>
>> </html>
>>
>> Hope this is helpful.
>>
>> Jonathan
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