libv4lconvert throws errors shorty after starting stream

[mungewell]

It may be related to my crappy hardware (P800 which is USB1.1) but I'm getting errors from libconvert which look to be related to missing/truncated data.

So far I have seen:
libv4lconvert: Error decompressing JPEG: error: more then 63 AC components (65) in huffman unit
libv4lconvert: Error decompressing JPEG: unknown huffman code: 0000ffd9
libv4lconvert: Error decompressing JPEG: fill_nbits error: need 1 more bits

Test program attached.
Mungewell

[mungewell (simon-mungewell)]

I've now also seen a critical error, which stopped the application.
--
ubuntu@ubuntu:~/python-v4l2-capture$ ./streamgtk.py -g -b -l -v -x 640 -y 480
Capture size 640 480
starting capture
libv4l2: error converting / decoding frame data: v4l-convert: error parsing JPEG header: Bogus jpeg format

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.5/threading.py", line 486, in __bootstrap_inner
    self.run()
  File "./streamgtk.py", line 89, in run
    image_data = video.read_and_queue()
IOError: [Errno 5] Input/output error
--