Transcoding crashing playback

[HonzaIL]

I have Channels 2023.05.19.2045 on Synology DS920+ with the latest DSM 7.2-64570 Update 1. I am receiving HD OTA (Chicago area) and signals (as reported by Signal GH) are excellent all around. I am using hardware transcoding.

Recently, for maybe week or so, the playback using browser (on macOS) keeps stopping. I do not remember this happening before, Channels (using them for years now) have been very stable.

When playback stops, I get generic show screen from Guide, and spinning circle as if Channels do not have enough transcoded data. It hangs forever, so I need to stop the playback and start again at which point it plays from the same place again without issues.
Playback on iPad has no issues (no transcoder involved) and no observable artifacts in the problematic areas.

The log indicates corruption of the data, see below:

'''
2023/07/18 19:43:38.958922 [HLS] ffmpeg: file7495-ip10.0.0.125: [mpegts @ 0x8e1f840] Packet corrupt (stream = 1, dts = 4741668418), dropping it.
2023/07/18 19:43:38.958975 [HLS] ffmpeg: file7495-ip10.0.0.125: [mpegts @ 0x8e1f840] Packet corrupt (stream = 2, dts = 4741685698), dropping it.
2023/07/18 19:43:38.960302 [HLS] ffmpeg: file7495-ip10.0.0.125: [mpegts @ 0x8e1f840] Packet corrupt (stream = 1, dts = 4741668418), dropping it.
2023/07/18 19:43:38.960322 [HLS] ffmpeg: file7495-ip10.0.0.125: [mpegts @ 0x8e1f840] Packet corrupt (stream = 2, dts = 4741685698), dropping it.
2023/07/18 19:43:38.960406 [HLS] ffmpeg: file7495-ip10.0.0.125: [mpegts @ 0x8e1f840] Packet corrupt (stream = 1, dts = 4741668418), dropping it.
2023/07/18 19:43:38.960424 [HLS] ffmpeg: file7495-ip10.0.0.125: [mpegts @ 0x8e1f840] Packet corrupt (stream = 2, dts = 4741685698), dropping it.
2023/07/18 19:43:40.199468 [HLS] Stopping inactive session file7495-ip10.0.0.125
'''
Playback quality is set for 1080p/10mbits.

I assumed I have flaky receiver (HDHomerun Quattro) or network connection, so I upgraded to HDFX-4K and replaced network connection. No change. About every 5 minutes playback crashes with the same messages in logs. The time is quite random - from few seconds to many minutes. Most observed on ABC 7, but that happens at this time to be the most watched channel also.

Anyone has suggestion what to try/test/check? I am completely stumped by now.

[rmdupont]

I received a pop up message while starting to upgrade my Synology NAS to 7.2.

I immediately stopped the upgrade until I could verify the changes would not affect my transcoding.

I'm still working on that. You cannot downgrade the Synology upgrade, so I want to get all things right.

-- Mike

[mrgf09]

I'm on DSM 7.2-64570 Update 1, no issues with transcoding.

[HonzaIL]

I should provide update...
After week or so the playback using transcoding sorted itself out and started to work fine. The only thing I did is check the "Experimental TV Everywhere MPEG-TS Rewriter", but I am not sure if this is even related as I do not use TV Everywhere channels. No problems since then. Confusing.

[chDVRuser]

AME Advanced Media Extensions is only used by Synology software, not Channels DVR.
Quick Connect is used to access your Synology remotely, it is not used by Channels DVR for remote access.