On Sunday 30 May 2010 23:58:11 Andy Walls wrote: > On Sun, 2010-05-30 at 23:28 +0200, Ondrej Zary wrote: > > On Sunday 30 May 2010 21:26:14 Andy Walls wrote: > > > On Sun, 2010-05-30 at 19:55 +0200, Ondrej Zary wrote: > > > > On Sunday 30 May 2010 13:34:55 Jean-Francois Moine wrote: > > > > > > SP54 is Sunplus' ( http://www.sunplus.com.tw/ ) FourCC code for a > > > version of MJPEG with the headers removed according to > > > > > > http://www.fourcc.org/ > > > > > > > Maybe we can dump some data, create AVI file from that and try to > > > > decode the file using that codec. > > > > > > FourCC.org points to this page: > > > > > > http://libland.fr.st/download.html > > > > > > which points to a utility to conver the data back into an MJPEG: > > > > > > http://mxhaard.free.fr/spca50x/Download/sp54convert.tar.gz > > > > > > > > > I have no idea if any of the above is true, 'cause I read it on the > > > Internet. ;) > > > > Modified that utility to work on raw video frame extracted from usbsnoop > > file. The bad news is that the resulting jpeg file is not readable. > > > > I also deleted the sp5x_32.dll file and the camera still works... > > I would try extracting a JPEG header from one of the files captured by > the camera in stand alone mode (either a JPEG still or MJPEG file), and > put that header together with the image data from the USB capture. It > may not look perfect, but hopefully you will get something you > recognize.
Just thought about the same thing so I uploaded a video file: http://www.rainbow-software.org/linux_files/spca1528/sunp0003.avi > Attached was Theodore's first attempt of such a procedure with a header > extracted from a standalone image file from my Jeilin based camera and > USB snoop data from the same camera. It wasn't perfect, but it was > recognizable. Thanks, I'll try that tomorrow. > I did look at the image data file Jean-Francois provided from your > usbsnoop logs. To my eye the data looks like it is Huffman coded > (indicating JPEG). Maybe I'm just seeing what I want to see. > > > Regards, > Andy -- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
