Stuttering video in VOD

[cwiggins999]

I'm trying out "vod" and "vod-live" URLs. I downloaded the Big Buck Bunny MP4 and put it on my server. It plays back fine. But some other MP4 files, including the commonly used for testing "Serenity trailer" have jitters/stutters in the playback. Any ideas on how to get around this problem? Also is there a way to have VOD playback loop the files continuously?

Some file statistics for the two files:
Big Buck Bunny:
Frame width 640, height, 360, Video data rate 696kbs, frame rate 24fps
Serenity trailer
Frame width 1280, height, 720, Video data rate 4660kbs, frame rate 23fps

 

[Max]

Also is there a way to have VOD playback loop the files continuously?

Try to add this setting in flashphoner.properties

vod_live_loop=true

The loop option should work for vod-live mode only.

Any ideas on how to get around this problem?

We will download the trailer and check. I will inform you about our progress through this thread.

 

[cwiggins999]

I uploaded my copy of the file so we are dealing with the same thing. Thanks for checking.
...though I can't see where the file was uploaded.

 

[Max]

It should be too big to be uploaded.
This is file we will check:
http://www.dvdloc8.com/clip.php?movieid=8419&clipid=2

 

[cwiggins999]

Thanks - that appears to be identical to the one I'm using.

 

[Max]

Hello

We have checked the mp4 trailer.
It is encoded with High H.264 profile.
The profile is not currently supported by Chrome browser.
Therefore you have several options:

1. Transcode your mp4 files to a lower profile.
For example to Main H.264 profile using ffmpeg or another decoding/encoding software.

2 Enable transcoding on the fly.
You can add this setting

disable_streaming_proxy =true

to WCS_HOME/conf/flashphoner.properties
then WCS will transcode the trailer on the fly.
Please note, the server-side on the fly transcoding can utilize 1 physical core CPU per transcoding session.
So if you deliver 10 mp4 files simultaneously, it can utilize 10 CPU cores.

As you can see, first option is most preferred.

 

[cwiggins999]

Thanks! I transcoded my files using ffmpeg and they seem to be working much better.
I also set "vod_live_loop=true", and the vod_live files are looping, but there seems to be a ~30 second delay before each loop of the file, regardless of the length of the file. Is there a way to have them play continuously?

 

[Max]

Currently VOD loop is experimental setting and this feature needs improvements.
We will inform you once we have any progress here.