Bug 107505 – ivtv-0.3.8 captures defective video

• Product: Gentoo Linux
• Status: RESOLVED NEEDINFO

[Description Robert Forsman 2005-09-28 06:31:51 UTC]

I upgraded my MythTV to Kernel 2.6.12.5 and ivtv-0.3.8 and some of the recorded
video has temporal flaws.  Randomly (sometimes 4 times in a minute, sometimes
once every 5 minutes) the video slows down and the audio gets stuttery.  It is
as if the video contains more frames than it has audio.  I did not notice this
problem when watching live TV for 30 seconds (but possibly I didn't watch TV
long enough; I almost never watch live TV).

  I did not have these problems under kernel 2.4.28-gentoo-r8 and ivtv-0.2.0-rc2k.

  I am unable to try the 0.2.0_rc2-r15 ebuild of ivtv.  The source tars have
disappeared.

Reproducible: Always
Steps to Reproduce:




Portage 2.0.51.22-r2 (default-linux/x86/2005.0/2.4, gcc-3.3.6, glibc-2.3.5-r1,
2.6.12.5 i686)
=================================================================
System uname: 2.6.12.5 i686 AMD Athlon(tm) XP  2600+
Gentoo Base System version 1.6.13
dev-lang/python:     2.3.5-r2
sys-apps/sandbox:    1.2.12
sys-devel/autoconf:  2.13, 2.59-r6
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6
sys-devel/binutils:  2.15.92.0.2-r10
sys-devel/libtool:   1.5.18-r1
virtual/os-headers:  2.4.22-r1
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O2 -march=i686 -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env
/usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3/share/config
/usr/lib/X11/xkb /usr/share/config /var/bind /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -march=i686 -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig distlocks sandbox sfperms strict"
GENTOO_MIRRORS="ftp:///ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/
ftp://ftp.gtlib.cc.gatech.edu/pub/gentoo http://mirror.datapipe.net/gentoo
ftp://gentoo.chem.wisc.edu/gentoo/"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/home/thoth/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="x86 3dnow 3dnowex X Xaw3d acl alsa apache2 apm avi bash-completion berkdb
bitmap-fonts bonobo bzilb cdr crypt cups divx4linux doc dvd dvdr emboss encode
esd fam flac foomaticdb gd gdbm gif gnome gpm gstreamer gtk gtk2 gtkhtml guile
imagemagick imlib ipv6 java jpeg junit kde lcd libg++ libwww lirc mad maildir
mikmod mjpeg mmx mmx2 mng motif mp3 mpeg mysql mythtv ncurses nls nojython ogg
oggvorbis opengl oss pam pdflib perl png python qt quicktime readline sdl slang
spell sse ssl svg svga tcltk tcpd theora tiff transcode truetype truetype-fonts
type1-fonts unicode v4l v4l2 vim-with-x vorbis wmf xinerama xml xml2 xmms xprint
xv xvid zlib userland_GNU kernel_linux elibc_glibc"
Unset:  ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, MAKEOPTS

[Comment 1 Doug Goldstein (RETIRED) 2005-09-28 16:13:47 UTC]

That old ivtv wouldn't work with a kernel that new. So you wouldn't be able to
try it.

You need to provide dmesg outputs when the ivtv driver loads, while recording
and when this occurs to get anything remotely meaningful back. You also need to
provide the output of ivtv-detect

It also could be the change to the new kernel and different kernel options
you've picked. It could be MythTV's playback being bad do to some kernel/glibc
dependancy that's changed. There's way to many variables here that have changed
to blame that driver.

Also, run a test with mplayer /dev/video0

[Comment 2 Robert Forsman 2005-09-29 08:07:02 UTC]

I discovered some encoding glitches in stuff recorded this morning under kernel
2.4.28-gentoo-r8 that still has the old itv modules.  I reverted to my old
firmware in /lib/modules and rebooted.  If new recordings do not have encoding
glitches, I'll try the old firmware with the 2.6 kernel.