Public bug reported: Binary package hint: xserver-xorg-video-v4l
Video from analog TV channels is shown distorted by black bars. DVB video (digital TV) has block artefacts and chopped audio (the latter even occurs on DVB radio channels) whenever accessed by v4l (presumably upgraded to v4l2 in Ubuntu 8.04 "Hardy Heron"). The issue occurs in xawtv (output reproduced below) but can also be demonstrated in other applications such as the Ekiga VoIP client (formerly known as GnomeMeeting) when configured to use the same device as its video feed. The audio distortion disappears as soon as the video display is closed with the source left running. This as well as the fact that the same hardware performs just fine under a legacy Ubuntu 7.04 installed in parallel demonstrates that bad signal (i.e. weak TV reception leading to UNCorrectable errors) cannot possibly be the cause of these issues, also the symptoms may look similar at first glance. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/230882 may be related. mplayer and xine have no trouble playing back the same streams through other methods, such as streamed over http by a local VDR (a Linux "killer app" which is otherwise rendered unusable by this and a related issue, a conflict of a buggy budget_av kernel module, cf. http://linuxtv.org/hg/v4l-dvb/log/19964051c5f1/linux/drivers/media/dvb /dvb-core/dvb_ca_en50221.c, somehow conflicting with the serial port handling and hence driving system load through the root, cf. http://vdr- portal.de/board/thread.php?threadid=77155 and http://vdr- portal.de/board/thread.php?threadid=77950 in German). [EMAIL PROTECTED]:~$ xawtv & [1] 6806 [EMAIL PROTECTED]:~$ This is xawtv-3.95.dfsg.1, running on Linux/i686 (2.6.24-19-generic) xinerama 0: 1920x1200+0+0 X Error of failed request: XF86DGANoDirectVideoMode Major opcode of failed request: 137 (XFree86-DGA) Minor opcode of failed request: 1 (XF86DGAGetVideoLL) Serial number of failed request: 13 Current serial number in output stream: 13 v4l-conf had some trouble, trying to continue anyway v4l2: WARNING: framebuffer size mismatch v4l2: me=1920x1200 v4l=0x0 Warning: Cannot convert string "-*-ledfixed-medium-r-*--39-*-*-*-c-*-*-*" to type FontStruct ioctl: VIDIOC_REQBUFS(count=2;type=VIDEO_CAPTURE;memory=MMAP): Success ioctl: VIDIOC_G_FREQUENCY(tuner=0;type=unknown;frequency=0): Invalid argument ioctl: VIDIOC_S_STD(std=0x7 [PAL_B,PAL_B1,PAL_G]): Device or resource busy ioctl: VIDIOC_S_FREQUENCY(tuner=0;type=ANALOG_TV;frequency=4294967295): Invalid argument ** Affects: xserver-xorg-video-v4l (Ubuntu) Importance: Undecided Status: New -- Distorted video (and chopped audio) using xawtv etc. despite "v4l-conf had some trouble" https://bugs.launchpad.net/bugs/243734 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
