stream not showing until exiting picam

[joop339]

So this is gonna be a hard one to explain.
Following the instructions and starting a live stream i get no errors.
I open vlc and start the video stream however i get neither sound nor video.

But when i close the stream using ctrl-c in the terminal a short clip suddenly show up in vlc. This happens everytime i exit.

some stuff i figured out that might be related.

When performing a reboot i cant run ./picam and get this error: "error creating state dir (./state): File exists"
I can fix this by running make_dirs.sh.

i cant run make_dirs.sh without sudo i get this error: "ln: failed to create symbolic link '/run/shm/rec/archive': Permission denied"

i cant run ./picam without sudo i get this error: "stat directory: Permission denied
State file open failed: Permission denied"
and
avio_open for /run/shm/hls/1.ts failed: Permission denied

i hope you can help me with this. If there's any more information you need please send me a message.

[joop339]

debug.log

also here is my debug log from vlc. I don't see anything really weird in there, but then again iam not that experienced.

also also.
it seems like when i dont restart the stream i can keep playing the 1 second clip i get after closing ./picam.

its like it just does nothing and then when i exit saves a 1 second clip on that adress.

[kendaw]

I'm having this exact same problem. Installed everything today using the Raspberry Pi OS (32-bit) Lite (27 May 2020).

Edit: To add to the issue, as joop stated, once I stop picam (ctrl+c) there is a ~1 second file that remains in memory that I'm able to play via VLC from a separate client.

Edit#2: Could the problem be related to using the recording command while running picam? Entering

touch hooks/start_record

Does nothing for me.

[kendaw]

@joop339 any luck in the past few days in resolving this issue?

[joop339]

@kendaw sadly no. I went back to streaming using VLC directly.

[kendaw]

@joop339 from the host/client itself, I assume?

[kendaw]

@joop339 if you still want to view the feed from a remote client, I was able to using this web player: https://kamranicus.com/guides/raspberry-pi-3-baby-monitor#optionally-adding-a-web-player

[SebastianSTARITZ]

I do have the same issue.

I'm using buster lite and 1.4.9

• i tried -p (preview) and capturing was OK
• .ts files ar generated and accessible via client. Each is ~ 149kB big.
• i downloaded one .ts file and tried to open it "offline" via VLC -> still no video
• i tried different versions 1.4.7 , 1.4.8, 1.4.9 binaries ..... still no change
• i tried different start parameters like changing fps, widht, height, avclevel and so on -> no change

no error in /var/log/picam
no suspicious output in /var/log/messages when greping for "cam", "picam", "video", "hls", "avc", "codec"

webplayer from kamranicus.com is working OK

any ideas where to look at in order to debug?

[SebastianSTARITZ]

So this is gonna be a hard one to explain.
Following the instructions and starting a live stream i get no errors.
I open vlc and start the video stream however i get neither sound nor video.

But when i close the stream using ctrl-c in the terminal a short clip suddenly show up in vlc. This happens everytime i exit.

some stuff i figured out that might be related.

When performing a reboot i cant run ./picam and get this error: "error creating state dir (./state): File exists"
I can fix this by running make_dirs.sh.

i cant run make_dirs.sh without sudo i get this error: "ln: failed to create symbolic link '/run/shm/rec/archive': Permission denied"

i cant run ./picam without sudo i get this error: "stat directory: Permission denied
State file open failed: Permission denied"
and
avio_open for /run/shm/hls/1.ts failed: Permission denied

i hope you can help me with this. If there's any more information you need please send me a message.

Hi, i checked your log. It seems to point out some issues with the .ts files. At least, that's what i suspect after trying some things

ts warning: Broken stream: pid 256 sends packets with dts 888900us later than pcr, applying delay ts debug: first packet for pid=257 cc=0x5 adaptive debug: Retrieving http://192.168.178.115:80/hls/11.ts @0 ts warning: discontinuity received 0x0 instead of 0x8 (pid=17) ts error: libdvbpsi error (PSI decoder): TS discontinuity (received 0, expected 8) for PID 17 ts debug: SDTCallBack called ts debug: Can't read TS packet at 552720