[raspimjpeg.py] TypeError raised on startup

[pschmitt]

Hi,

when launching raspimjpeg.py a TypeError is raised on my Raspberry Pi 2 Model B.
This may be a picamera issue.

Info

OS: archlinuxarm
Python version: 3.6.0
picamera version: 1.10 (Tested with 1.13 as well, the issue persists)

Trace

INFO:root:raspimjpeg.py 0.8
INFO:root:hello!
DEBUG:root:initializing camera
DEBUG:root:using resolution 800x600
DEBUG:root:using framerate = 10
DEBUG:root:using vflip = false
DEBUG:root:using hflip = false
DEBUG:root:using rotation = 0
DEBUG:root:using brightness = 50
DEBUG:root:using contrast = 0
DEBUG:root:using saturation = 0
DEBUG:root:using sharpness = 0
DEBUG:root:using exposure compensation = 0
DEBUG:root:using video stabilization = false
DEBUG:root:using denoise = false
DEBUG:root:using image effect = none
DEBUG:root:camera initialized
DEBUG:root:starting capture
Traceback (most recent call last):
  File "raspimjpeg.py", line 327, in <module>
    run()
  File "raspimjpeg.py", line 314, in run
    use_video_port=not options.stills, thumbnail=None, quality=options.quality)
  File "/usr/lib/python3.6/site-packages/picamera/camera.py", line 1680, in capture_sequence
    if not encoder.wait(self.CAPTURE_TIMEOUT):
  File "/usr/lib/python3.6/site-packages/picamera/encoders.py", line 853, in wait
    raise self.exception
  File "/usr/lib/python3.6/site-packages/picamera/encoders.py", line 693, in _callback
    stop = self._callback_write(buf)
  File "/usr/lib/python3.6/site-packages/picamera/encoders.py", line 1443, in _callback_write
    super(PiOneImageEncoder, self)._callback_write(buf, key)
  File "/usr/lib/python3.6/site-packages/picamera/encoders.py", line 731, in _callback_write
    ct.string_at(buf[0].data, buf[0].length))
TypeError: write() argument must be str, not bytes

[ccrisan]

I only tested raspimjpeg.py on python2. For now there are no plans to port it to python3. Pull requests are welcomed though :)

[pschmitt]

Yeah that's definitely a Python 3 issue. With Python 2.7 it works fine.