./picam: No such file or directory

[kimiroo]

I'm having a problem starting up picam.

I followed the installation guide and also tried with freshly imaged pi.

$ ./picam --alsadev hw:1,0
-bash: ./picam: No such file or directory

$ ldd ~/picam/picam
        not a dynamic executable

$ ls -la
total 15448
drwxr-xr-x 3 pi pi     4096 Sep  9 23:55 .
drwxr-xr-x 5 pi pi     4096 Sep  9 23:52 ..
drwxr-xr-x 2 pi pi     4096 Sep  9 22:23 archive
lrwxrwxrwx 1 pi pi       14 Sep  9 22:23 hooks -> /run/shm/hooks
-rwxr-xr-x 1 pi pi 15803936 Sep  9 22:23 picam
lrwxrwxrwx 1 pi pi       12 Sep  9 22:23 rec -> /run/shm/rec
lrwxrwxrwx 1 pi pi       14 Sep  9 22:23 state -> /run/shm/state

I checked my current directory and file existence but it was there.

I'm currently using raspberry pi os lite (32bit) (bullseye). Any ideas?

[kimiroo]

It seems like picam is having problem importing libraries in 32bit varient of raspberry pi os. Tried in 64bit raspberry pi os lite but it works like a charm. However I need this to work in Pi zero. Tried using sudo, installing libcamera but sudo didn't work and libcamera was up to date.

[iizukanao]

Please use picam-2.0.12-armv7l.tar.xz for 32-bit OS, though it has not been tested on Raspberry Pi Zero.

[kimiroo]

Works perfectly. Thanks!

Though pi zero seems to be struggling with combining audio and video input. Perhaps zero 2w might be able to handle the job.

[iizukanao]

Thanks for the feedback. For older models like the Raspberry Pi Zero, try using a resolution of 1280x720 (-w 1280 -h 720) instead of the default 1920x1080.

[kimiroo]

Yeah I tried lowering the resolution, but it seems to struggle with 720p too. If I don't use audio it can handle 720p. But when I enable audio, the audio sync drags and video chops once a while. Both in recording and streaming. I haven't tested the recording since it wasn't my main objective, but the pi zero wasn't able to keep up when I streamed via rtmp. Only when I streamed at 480p it was able to stream smoothly without any sync drift or choopy fps. I used RAM disk as mentioned in readme.md but the results were the same. The ffmpeg was using cpu almost 90%, and pi wasn't able to keep up. Perhaps with bit of ffmpeg and config tweaks it might be able to do 720p streaming with audio?

Also, the picam was displaying data rate from microphone is too slow so changing the microphone might help?

[iizukanao]

Sorry, I do not have a Raspberry Pi Zero so I cannot answer further on this issue. It would be better to use the Raspberry Pi Zero 2 W before purchasing another microphone.