Short video clips with cracking noises/ms lag/slience


#1

Hi,

I have a problem with the sound of some video clips. I want to run a playlist of some clips. Because I’m using a 2+ server version of CasparCG I have to use JustMacros for that. In that program I run raw commands to the server, for example:

CasparSendRaw( 1, “LOADBG 1-10 /CME CUT 1” );
CasparSendRaw( 1, “PLAY 1-10 CME CUT 1” );

Thats just for understading of my setup. Now I hear random silence moments in these videos. Just a few ms but enough to recognize it. Does anybody know why this is like that?
I’m getting a warning in the CasparCG console, maybe it’s that?
ffmpeg[umlCashBack.mp4|1920x1080p24.00|1/360] Frame blending frame rate conversion required to conform to channel frame rate.


#2

The clip is 24fps and the channel 25/50. That does not work. As it tries to adapt to the framerate and creates dropout while doing so.


#3

So converting all clips to 50fps should help maybe?


#4

It depends of the settings of your channel. If your channel is 24fps, you can use 24fps and/or 48fps video. If your channel is 29.97fps or 59.94fps you can use 29.97fps and/or 59.94fps.

CasparCG Server has a Framerate Producer which can only half or double the framerate of the material you’re feeding to the server.

So, take a look at your casparcg.config file for the framerate of your channel, and convert your videos accordingly.


#5

My framerate for the channel is 50fps


#6

So, you need 25p, 50i or 50p material to get proper results.