Hi , i tested it with 2.6.31-rc9 & libvl 0.6.1 + svv and cannot reproduce. 301147.626826] gspca: probing 093a:2626 [301147.641578] gspca: probe ok [301147.641607] gspca: probing 093a:2626 [301147.641770] gspca: probing 093a:2626 [301147.641829] usbcore: registered new interface driver pac7311 [301147.641835] pac7311: registered Could you try testing with svv.c app? pd: quality is not the best, but works ok. Seem that the format is not the proper or expected "pjpeg" on your streaming. 2009/9/11 Németh Márton <nm127@xxxxxxxxxxx>: > Márton Németh wrote: >> Hi, >> >> I have a Labtec Webcam 2200 and I have problems with the image quality >> with Linux 2.6.31 + libv4l 0.6.1. I made some experiments and stored >> each captured image as raw data and when libv4l was able to convert >> then I also stored the result as bmp. >> >> You can find my results at http://v4l-test.sourceforge.net/results/test-20090911/index.html >> There are three types of problems: >> a) Sometimes the picture contains a 8x8 pixel error, like in image #9 >> http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00009 >> b) Sometimes the brightness of the half picture is changed, like in >> images #7, #36 and #37 >> http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00007 >> http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00036 >> http://v4l-test.sourceforge.net/results/test-20090911/index.html#img00037 >> c) Sometimes the libv4l cannot convert the raw image and the errno >> is set to EAGAIN (11), for example image #1, #2 and #3 >> >> Do you know how can I fix these problems? > > I investigated the c) point a little bit. When I get a negative return value > from the v4lconvert_convert() function then I print out the error message what the > v4lconvert_get_error_message() function returns. With the result log file > I executed a "grep v4l-convert |sort |uniq" command. All the error messages are > coming from the tinyjpeg.c (Small jpeg decoder library): > > v4l-convert: error decompressing JPEG: error: more then 63 AC components (65) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (66) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (67) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (68) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (69) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (70) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (71) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (72) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (73) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (75) in huffman unit > v4l-convert: error decompressing JPEG: error: more then 63 AC components (76) in huffman unit > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x00 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x01 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x02 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x04 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x08 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x09 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x0a > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x10 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x12 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x14 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x1a > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x1b > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x1c > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x1f > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x80 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x82 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x87 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x88 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x89 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x8a > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x8b > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x8c > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x8d > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x8e > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x8f > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x90 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x91 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x92 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x93 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x94 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x95 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x96 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x97 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x99 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x9b > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x9c > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x9d > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x9e > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0x9f > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xa3 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xa5 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xa6 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xa7 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xa9 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xaa > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xab > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xad > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xaf > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xb3 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xb5 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xb7 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xb8 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xb9 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xbc > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xbd > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xbe > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xbf > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xc0 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xc4 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xc6 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xc7 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xc9 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xcb > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xcc > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xcf > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xd1 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xd2 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xd3 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xd4 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xdc > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xdf > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xe5 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xe7 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xe8 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xea > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xeb > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xec > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xf0 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xf2 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xf4 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xf5 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xf8 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xf9 > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xfa > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xfc > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xfe > v4l-convert: error decompressing JPEG: Pixart JPEG error: invalid MCU marker: 0xff > v4l-convert: error decompressing JPEG: Pixart JPEG error, stream does not end with EOF marker > v4l-convert: error decompressing JPEG: unknown huffman code: 0000ff81 > v4l-convert: error decompressing JPEG: unknown huffman code: 0000ffec > v4l-convert: error decompressing JPEG: unknown huffman code: 0000ffff > > Regards, > > Márton Németh > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
