Closed caption issue on one network only

Ricknextpvr · (This post was last modified: 2021-03-04, 10:59 PM by Ricknextpvr.)

I use NextPVR to record OTA programs for the networks. We've increasingly been noticing a problem with closed captions on our local CBS affiliate - other networks are fine. Problems include typos, entire sentences of dialog skipped, and delays.

This is for shows like B Positive, SEAL Team, etc.

I actually contacted a CBS VP in charge of the area and was comparing episodes over time to try and pinpoint when it started, and came across something interesting. Watching the show with NPVR, I see the issues. Watching that same file with VLC, and the subtitles are perfect.

So the VLC software is picking up a different track for closed captioning than NPVR.

Is there a way to alter what track NPVR picks up?

mvallevand · 2021-03-04, 10:37 PM

Is it a CC1 vs CC2 issue or an issue that the correct track isn't rendering well. Typos make me thinking it is a a rendering issue. You probabaly need to place a 5 minute or longer chuck on a cloud drive so we can see the issue.

Martin

Ricknextpvr · (This post was last modified: 2021-03-04, 10:42 PM by Ricknextpvr.)

With VLC, it says it's using Closed Captions 1. I don't know what NPVR uses. When I try 2, 3, and 4 with VLC, nothing displays.

mvallevand · 2021-03-04, 10:42 PM

It sounds like a rendering issue to me. Which decoders did you try?

Martin

Ricknextpvr · (This post was last modified: 2021-03-04, 10:45 PM by Ricknextpvr.)

I am using the LAV decoders. And, keep in mind, the subtitles are fine for NBC and FOX. Only CBS has this issue.

I haven't changed anything, I had originally thought it was an issue with CBS changing something, then when I was pulling examples I accidently viewed a current program with VLC, and noted no issue, then viewed it with NPVR, and saw that it was different.

mvallevand · (This post was last modified: 2021-03-04, 10:46 PM by mvallevand.)

If VLC is showing them fine it is a rendering issue and not a broadcast network issue. You didn't provide logs so we can't tell you more then that.

Martin

Ricknextpvr · (This post was last modified: 2021-03-04, 10:50 PM by Ricknextpvr.)

Happy to provide logs. Should I watch part of the show, then stop playback, then create the logs? Or just send the most current logs (attached)?

mvallevand · 2021-03-04, 11:02 PM

The requested sample would be more helpful than logs.

Martin

Ricknextpvr · 2021-03-05, 12:02 AM

Have to figure out how to get a slice of one, and then put it somewhere where I don't have a concern linking to.

Graham · 2021-03-05, 03:25 PM

(2021-03-05, 12:02 AM)Ricknextpvr Wrote: Have to figure out how to get a slice of one, and then put it somewhere where I don't have a concern linking to.

Does this help ... https://github.com/sub3/NextPVR/wiki/CutChunk

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