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Transcoding and errors streaming SMIL

Marko Munda 2016-05-18 13:10:40 UTC in Nimble Streamer

Hi,

I am starting down the path that is this streaming platform and I came across some errors presented when the files are played in the through the smill playlist.

The transcoding softwarei use is FFMPEG and the command is : ffmpeg -y -i in.mp4 -vcodec libx264 -x264opts keyint=25:min-keyint=25:scenecut=-1 -vprofile high -preset slow -b:v 750k -maxrate 750k -bufsize 1500k -vf scale="trunc(oh*a/2)*2:720" -threads 0 -c:a copy out.mp4

When I play it directly there are no problems, but when I try to play it in DASH SMIL playlist file the error that I get is: wrong segment index

The smill file looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<smil title="">
<body>
<switch>
<video height="1080" src="1080p_out.mp4" systemLanguage="eng">
<param name="videoBitrate" value="2500000" valuetype="data"></param>
<param name="audioBitrate" value="44100" valuetype="data"></param>
</video>
<video height="960" src="960p_out.mp4" systemLanguage="eng">
<param name="videoBitrate" value="2000000" valuetype="data"></param>
<param name="audioBitrate" value="44100" valuetype="data"></param>
</video>
<video height="720" src="720p_out.mp4" systemLanguage="eng">
<param name="videoBitrate" value="1500000" valuetype="data"></param>
<param name="audioBitrate" value="44100" valuetype="data"></param>
</video>
</switch>
</body>
</smil>

In a post, I saw that this is a keyint problem, but I think I addressed this.

can anybody shade some light on it?

The other error I get is: not enough buffer to generate segment
if there is any setting that I must address please tell me.

Yury Udovichenko 2016-05-19 00:01:50 UTC 

Hello,

Could you please send us example of original file to help@wmspanel.com so we could analyse?

Alex Pokotilo 2016-05-19 00:50:02 UTC 

There is a good post in wowza forum
https://www.wowza.com/forums/showthread.php?46849-VOD-ABR-transcoding

Please find salvadore reply. He recommend to use 2-pass encoding. This should work

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