Noise rides on video playback at 1080i5994

General
,
1

As seen in other forums, when I play a video when the Video mode is 1080i5994, Noise is on.

Is there any solution to this problem?

ver.2.3.0

2

Would you mind explaining in more detail what the problem is?

3

I verified again and it seems that the noise occurs when the video mode fps is changed from the default of 50.

The noise is the same as in this forum video.

<?xml version="1.0" encoding="utf-8"?>

<configuration>
    <paths>
        <media-path>media/</media-path>
        <log-path disable="false">log/</log-path>
        <data-path>data/</data-path>
        <template-path>template/</template-path>
    </paths>
    <lock-clear-phrase>secret</lock-clear-phrase>
    <channels>
       <channel>
            <video-mode>1080i5994</video-mode>
              <consumers>
                <decklink>
                 <device>1</device>
                 <embedded-audio>true [true|false]</embedded-audio>
                 <chanel-layout>stereo</chanel-layout>
                 <latency>low [normal|low|default]</latency>
                 <buffer-depth>3 [1..]</buffer-depth>
                </decklink>
            <screen />
                <system-audio />
               </consumers>
        </channel>
    </channels>
    <controllers>
        <tcp>
            <port>5250</port>
            <protocol>AMCP</protocol>
        </tcp>
    </controllers>
    <amcp>
        <media-server>
            <host>localhost</host>
            <port>8000</port>
        </media-server>
    </amcp>
</configuration>
4

So you talk about crackling. That usually has to do with not matching frame rates. The video needs to be encoded in the same frame rate, of the channel it’s played on. In Japan (you are based in Japan, right?) the frame rate is 59.94fps or 60fps. Try encoding the video in this framerate.

Noise in the classical understanding is the sound of a waterfall.

5

That’s right, I live in Japan.

I am relying on translation, so I apologize for the difficulty in reading.

My video-mode is 1080i5994 and I have encoded the video to match it, but there is noise on it.
However, when I change the video-mode to 1080i6000, the noise disappears. However, I want 1080i5994 video output…

6

Are you sure, that the crackling does not come from the rendering?

Is there anybody from an NTSC country, that can help!

7

Yes, I don’t think this noise is due to rendering.

Perhaps this is where it is related.

8

I am doing 1080i5994 testing for my project. Please DM me links to test video files so I can do some investigation.

In my limited testing so far the audio cadence seems to be handled correctly in the mixer and decklink consumer. I can also confirm that the ffmpeg and decklink producers seems to deliver frames to the mixer with the correct audio cadence as well.
The system audio consumer is definitely broken for fractional frame rates though.

9

Thank you very much.

That’s good news that you’re not having audio problems with 1080i5994.

My version was 2.3.0, so I will check if there are any problems with the latest version and send you a video file for testing.