Video Playout Faster Than Normal?

General
,
1

Hi, I’ve tried server version 2.0.7 and 2.1.0.3437 and noticed that with video mode 720p6000 and 1080p6000, any video playback I do plays slightly faster than 1x speed. I tried using clips encoded with H.264 and H.265 but the playback still plays at a faster speed. I’m not sure how to address this problem and was wondering if anybody could help me approach this.

Thanks!

2

In what framerate are the files encoded? By default Caspar plays videofiles using the framerate of the channel, not the file. So 50fps files play at 60fps on such a channel.

3

The files are 60fps. Here’s the ffprobe for the file:

 Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.84.100
  Duration: 00:13:39.68, start: 0.000000, bitrate: 6173 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 6000 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 160 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
4

Looks like the audio sample rate is lower than the channels’ so it will sync it to the output device sample rate

5

I made another video with a sample rate of 48000 and CasparCG 2.0.7 still plays out the video at a slightly faster speed.

6

I have the same problem and therefore cannot upgrade from 2.0.7 to 2.2.0.

The files played are 25fps and 44khz. 2.0.7 plays that fine. (Broadcasted for over 180 hours without a problem!)

The audio in 2.2.0 sounds ‘flanged’(flanger) and indeed sounds like it tries to match some samplerate. (monitoring through system audio)

I understand that if the channel is 48khz the audio will do this. What I cannot find is how to set the sample rate of the channel? In the config file is only: ‘system audio’ defined and video mode which is set to 1080p2500 to match the content. I read that the audio will be transcoded realtime… I am lost… searched everywhere…

Thank you very much in advance!!! (I replied to this topic as it doesn’t seems to be solved yet.)

7

Can you post a bug report on Caspar’s GitHub page?

8

It seems as if this is the same issue as: #1170.

I will therefore just wait for an update and unfortunately stay with 2.0.7 for now…

I found some other posts from people having problems with 44khz audio. (I tried converting the file to 48khz but that didn’t help).

Thanks anyway!