Remote Viewing Stutters

Channels iOS
#1

I just enabled Remote viewing, and when I try to view this only iPhone 7+, it keeps buffering and then plays for 2 seconds and then goes back to buffering, I’ve tried on all streaming options, when the stream plays I can see the difference in quality but it still buffers after 1-2 seconds of playing. I’m wondering if there are ports or something I can do to help.

port 8089 is being open on my Synology NAS & Router does have a UPNP open for port 8089 are there any other ports I should open?

Also on a side note when this does get resolved this is going to be such killer feature! I literally joined the cord-shaving community less than a billing cycle now and the progress I see on this app from then until now is amazing. keep up the good work guys!

p.s. any way I can join the beta/ test flight?

#2

*Scratch the Beta/Testflight request. I just saw the other post where I can sign up.

#3

Only port 8089 is required.

Try to measure your upload bandwidth at home with speedtest.net. That should tell you what kind streaming option will work best.

I assume you were testing over LTE?

#4

Yes, over LTE I’ve run multiple Speedtest and have average 75/35

My Cell Provider is T-Mobile I’ve tried with and without Binge On option and it’s doing the same.

#5

Is that the speedtest of your home internet, or your LTE?

So even using Cellular Streaming = 320kbps on the Settings tab, it still stutters every few seconds?

#6

The 75/35 is for T-Mobile LTE Long Island NY Area,
My Home Speed is Gigabit Down/Up but in all honesty it floats 700/700.

Yea on all Stream Options it plays and then 1 to 2 seconds later it’s stays buffering a few seconds later it’ll play for a second again and goes back to buffering.

iPhone 7+ iOS 11.0.3

I tried it on the Beta version and it’ll just show the buffering wheel.

#7

What model is your Synology?

Depending on the CPU (speed and processor), it may not have enough power to transcode which is needed for certain remote viewing.

[less chance of it working if ARM based since I believe that hardware transcoding will not work with ARM processors and most are under powered for cpu transcoding ]

#8

Can you try playing via Safari using https://my.channelsdvr.net to see if it streams better? You will need to select the streaming rate on the Settings tab, then use On Now to watch a channel.

Do you have the same problem viewing recordings as well?

#9

I have a Synology 1513+

Specs are as Follow
Intel Atom Dual Core 2.13ghz
4GB DDR3 Ram
4x 4TB Seagate IronWolf HDD

#10

Just Tried what you asked me and its acting similar.

on the ON Now the lower I went in stream quality it loaded a bit faster but when it did it would load momentarily and then return to buffer.

on the Recorded shows, it would just hang, didnt load anything. here is the logs while I was attempting different streams.

2017/10/18 00:11:28 [HLS] Starting transcoder for file-11 at 8s (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
2017/10/18 00:11:40 [HLS] Stopping transcoder for file-11 after seek to 0s (out=9.151167s, finished=false)
2017/10/18 00:11:40 [HLS] Starting transcoder for file-11 at 0s (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
Error while decoding stream #0:0: Invalid data found when processing input
2017/10/18 00:11:58 [HLS] Stopping transcoder for file-11 after seek to 43s (out=2.252267s, finished=false)
2017/10/18 00:11:58 [HLS] Starting transcoder for file-11 at 43s (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
Error while decoding stream #0:0: Invalid data found when processing input
2017/10/18 00:13:06 [HLS] Stopping transcoder session file-11 @ 49.489833s
2017/10/18 00:13:11 [HLS] Starting transcoder for file-1 at 57m13s (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
[mpegts @ 0x29d7480] start time for stream 3 is not set in estimate_timings_from_pts
[mpegts @ 0x29d7480] start time for stream 4 is not set in estimate_timings_from_pts
[mpegts @ 0x29d7480] Dropped corrupted packet (stream = 1)
[mpegts @ 0x29d7480] Dropped corrupted packet (stream = 2)
[mpegts @ 0x29d7480] Dropped corrupted packet (stream = 1)
    Last message repeated 1 times
[ac3 @ 0x29fe4c0] frame sync error
Error while decoding stream #0:1: Invalid data found when processing input
2017/10/18 00:13:23 [HLS] Stopping transcoder for file-1 after seek to 56m58s (out=57m14.451467s, finished=false)
2017/10/18 00:13:23 [HLS] Starting transcoder for file-1 at 56m58s (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
[mpegts @ 0x1ee8480] start time for stream 3 is not set in estimate_timings_from_pts
[mpegts @ 0x1ee8480] start time for stream 4 is not set in estimate_timings_from_pts
[mpegts @ 0x1ee8480] Dropped corrupted packet (stream = 1)
[mpegts @ 0x1ee8480] Dropped corrupted packet (stream = 2)
[mpegts @ 0x1ee8480] Dropped corrupted packet (stream = 1)
    Last message repeated 1 times
[ac3 @ 0x1f4b9c0] frame sync error
Error while decoding stream #0:1: Invalid data found when processing input
2017/10/18 00:13:47 [HLS] Stopping transcoder for file-1 after seek to 11s (out=57m0.469144s, finished=false)
2017/10/18 00:13:47 [HLS] Starting transcoder for file-1 at 11s (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
[mpegts @ 0x3653480] start time for stream 3 is not set in estimate_timings_from_pts
[mpegts @ 0x3653480] start time for stream 4 is not set in estimate_timings_from_pts
[mpegts @ 0x3653480] Dropped corrupted packet (stream = 1)
[mpegts @ 0x3653480] Dropped corrupted packet (stream = 2)
[mpegts @ 0x3653480] Dropped corrupted packet (stream = 1)
    Last message repeated 1 times
[ac3 @ 0x36b6b00] frame sync error
Error while decoding stream #0:1: Invalid data found when processing input
2017/10/18 00:13:55 [HLS] Stopping transcoder session file-1 @ 11.867544s
2017/10/18 00:15:53 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:15:53 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=, deinterlacer=linear, bitrate=10000)
2017/10/18 00:16:05 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16793476)
2017/10/18 00:16:10 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25165868)
2017/10/18 00:16:14 [WRN] Buffer for 1311071A ch501 is more than 95% full (clients=1, len=31877468)
2017/10/18 00:16:15 [WRN] Buffer for 1311071A ch501 is more than 99% full (clients=1, len=33219788)
2017/10/18 00:16:21 [HLS] Stopping transcoder session ANY-ch501 @ 1.968633s
2017/10/18 00:16:21 [TNR] Closed connection to 1311071A for ch501
[hls @ 0x306efa0] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream2.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream2.ts
av_interleaved_write_frame(): No such file or directory
2017/10/18 00:16:34 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:16:34 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=1080, deinterlacer=linear, bitrate=8000)
2017/10/18 00:16:46 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16777684)
2017/10/18 00:16:51 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25165868)
2017/10/18 00:16:55 [HLS] Stopping transcoder session ANY-ch501 @ 1.9019s
2017/10/18 00:16:55 [TNR] Closed connection to 1311071A for ch501
[hls @ 0x1d30b60] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream2.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream2.ts
av_interleaved_write_frame(): No such file or directory
2017/10/18 00:17:11 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:17:11 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=720, deinterlacer=linear, bitrate=6000)
2017/10/18 00:17:22 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16777684)
2017/10/18 00:17:28 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25165868)
2017/10/18 00:17:32 [WRN] Buffer for 1311071A ch501 is more than 95% full (clients=1, len=31877468)
2017/10/18 00:17:33 [WRN] Buffer for 1311071A ch501 is more than 99% full (clients=1, len=33219788)
2017/10/18 00:17:40 [HLS] Stopping transcoder session ANY-ch501 @ 4.2042s
2017/10/18 00:17:40 [TNR] Closed connection to 1311071A for ch501
[mpegts @ 0x33e33e0] Dropped corrupted packet (stream = 1)
[mpeg2video @ 0x33eab00] invalid cbp -1 at 17 40
[mpeg2video @ 0x33eab00] Warning MVs not available
[hls @ 0x34e1ec0] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream4.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream4.ts
Error writing trailer of /volume1/video/Channels DVR/Streaming/ANY-ch501/stream.m3u8: No such file or directory
2017/10/18 00:17:52 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:17:52 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=720, deinterlacer=linear, bitrate=4000)
2017/10/18 00:18:04 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16777684)
2017/10/18 00:18:09 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25165868)
2017/10/18 00:18:14 [WRN] Buffer for 1311071A ch501 is more than 95% full (clients=1, len=31894576)
2017/10/18 00:18:15 [WRN] Buffer for 1311071A ch501 is more than 99% full (clients=1, len=33219788)
2017/10/18 00:18:29 [HLS] Stopping transcoder session ANY-ch501 @ 6.139467s
2017/10/18 00:18:29 [TNR] Closed connection to 1311071A for ch501
[hls @ 0x2d23460] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream6.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream6.ts
av_interleaved_write_frame(): No such file or directory
2017/10/18 00:18:42 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:18:42 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=720, deinterlacer=linear, bitrate=2000)
2017/10/18 00:18:54 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16777684)
2017/10/18 00:18:59 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25165868)
2017/10/18 00:19:04 [WRN] Buffer for 1311071A ch501 is more than 95% full (clients=1, len=31877468)
2017/10/18 00:19:05 [WRN] Buffer for 1311071A ch501 is more than 99% full (clients=1, len=33219788)
2017/10/18 00:19:50 [HLS] Stopping transcoder session ANY-ch501 @ 12.479133s
2017/10/18 00:19:50 [TNR] Closed connection to 1311071A for ch501
[hls @ 0x3786520] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream12.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream12.ts
av_interleaved_write_frame(): No such file or directory
2017/10/18 00:20:04 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:20:04 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=576, deinterlacer=linear, bitrate=3000)
2017/10/18 00:20:16 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16777684)
2017/10/18 00:20:21 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25165868)
2017/10/18 00:20:29 [WRN] Buffer for 1311071A ch501 is more than 95% full (clients=1, len=31877468)
2017/10/18 00:20:30 [WRN] Buffer for 1311071A ch501 is more than 99% full (clients=1, len=33219788)
2017/10/18 00:20:54 [HLS] Stopping transcoder session ANY-ch501 @ 11.4114s
2017/10/18 00:20:54 [TNR] Closed connection to 1311071A for ch501
[hls @ 0x1a61d00] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream11.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream11.ts
av_interleaved_write_frame(): No such file or directory
2017/10/18 00:21:11 [TNR] Opened connection to 1311071A for ch501
2017/10/18 00:21:11 [HLS] Starting transcoder for channel 501 (encoder=libx264, resolution=240, deinterlacer=linear, bitrate=360)
2017/10/18 00:21:25 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16785580)
2017/10/18 00:21:29 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16785580)
2017/10/18 00:21:35 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25168500)
2017/10/18 00:21:39 [WRN] Buffer for 1311071A ch501 is more than 95% full (clients=1, len=31877468)
2017/10/18 00:21:40 [WRN] Buffer for 1311071A ch501 is more than 99% full (clients=1, len=33219788)
2017/10/18 00:22:15 [WRN] Buffer for 1311071A ch501 is more than 50% full (clients=1, len=16797304)
2017/10/18 00:22:19 [WRN] Buffer for 1311071A ch501 is more than 75% full (clients=1, len=25166804)
[mpegts @ 0x1a1c3e0] Dropped corrupted packet (stream = 0)
[mpegts @ 0x1a1c3e0] Dropped corrupted packet (stream = 1)
2017/10/18 00:22:22 [HLS] Stopping transcoder session ANY-ch501 @ 35.2352s
2017/10/18 00:22:22 [TNR] Closed connection to 1311071A for ch501
[hls @ 0x1ab59c0] failed to rename file /volume1/video/Channels DVR/Streaming/ANY-ch501/stream35.ts.tmp to /volume1/video/Channels DVR/Streaming/ANY-ch501/stream35.ts
av_interleaved_write_frame(): No such file or directory
#11

It seems your Atom processor might not be powerful enough to transcode video.

When you’re trying to watch at 720p/4mbps for instance, what does it say underneath the player?

#12

720p/4mbps = Transcoder Running: 24.457767s @ 0.212x

#13

0.2x is too slow. It needs to be 1x or higher.

For transcoding we recommend Intel Celeron. Unfortunately Intel Atom does not support Quick Sync.

#14

Can you copy/paste the exact CPU model as listed at the top of the DVR web UI Settings tab?

#15

OS Synology DS1513+
Linux
(kernel: 3.10.105)

CPU
4 cores / Intel® Atom™ CPU D2701 @ 2.13GHz
load averages: 3.01 2.78 3.04

RAM
3.86 GB
23.0% free

#16

Thanks. Unfortunately I don’t think there’s much we can do at this point to make this work with your NAS. I’m going to improve the experience here to show an error message in the app instead of letting the player stream and get stuff buffering.

#17

I have a DS1515+ that I have in my Office, which has this,

CPU Model: Intel Atom C2538.
CPU Frequency: Quad Core 2.4GHz.
8gb DDR3 Ram

would this work better? I could swap out that unit and try it there, if you concur.

#18

Honestly I’m not sure. From my limited knowledge the entire Atom series is fairly underpowered. But the CPU in the 1515+ is two years newer and has twice as many cores, so it may work better.

I’d try installing the DVR on there and streaming via the web UI to see what kind of transcoding rates you see. Let me know if its higher than 0.2x and is able to stay over 1.0x

#19

I have an 1815+ with the same CPU in the 1515+ and it will only be able to transcode at very low bitrates.

#20

have you found a alternative solution? different Hardware? recommended units?