Alle giovedì 08 gennaio 2009, Mauro Carvalho Chehab ha scritto: > On Thu, 8 Jan 2009 03:00:33 +0100 > > Nicola Soranzo <nsoranzo@xxxxxxxxxx> wrote: > > Alle giovedì 08 gennaio 2009, Mauro Carvalho Chehab ha scritto: > > > On Wed, 7 Jan 2009 20:31:27 +0100 > > > > > > Nicola Soranzo <nsoranzo@xxxxxxxxxx> wrote: > > > > Hi everybody, > > > > I have a Hauppauge WinTV-HVR-900 (R2) USB stick, model 65018, which > > > > has Empiatech Em2880 chip, Xceive XC3028 tuner and Micronas drx397x > > > > DVB-T demodulator. > > > > On the same laptop I have an Intel High Definition Audio soundcard > > > > and a Syntek DC-1125 webcam. > > > > ... > > > > I can see analog video, but no audio with any program I used (tvtime, > > > > xawtv, MythTV). > > > > I'm attaching the part of /var/log/messages after the stick attach > > > > and the output of the following commands: > > > > aplay -l > > > > arecord -l > > > > cat /proc/asound/cards > > > > cat /proc/asound/devices > > > > cat /proc/asound/modules > > > > cat /proc/asound/pcm > > > > > > For you to listen on audio, you need to get the audio from the digital > > > em28xx input and write it on your sound card output. Unfortunately, > > > most programs don't do this. The only one that does is mplayer, if you > > > pass the proper parameters for it. Something like (for PAL-M std): > > > > > > mplayer -tv > > > driver=v4l2:device=/dev/video0:norm=PAL-M:chanlist=us-bcast:alsa=1:adev > > >ice= hw.1:audiorate=48000:forceaudio=1:immediatemode=0:amode=1 tv:// > > > > > > Assuming that em28xx is detected as hw:1 and your audio as hw:0. You > > > can check the wiki for more help about this subject. > > > > I also have a webcam, so the tv is /dev/video1 and relative audio is hw.2 > > (see attachments from my previous email). > > Unfortunately I had tried previously with mplayer and using: > > > > mplayer -tv driver=v4l2:device=/dev/video1:norm=PAL:chanlist=europe-west > > tv:// > > > > I can see the video without audio, while with: > > > > mplayer -tv driver=v4l2:device=/dev/video1:norm=PAL:chanlist=europe- > > west:alsa=1:adevice=hw.2:audiorate=48000:forceaudio=1:immediatemode=0:amo > >de=1 tv:// > > > > mplayer exits immediately with this error: > > > > v4l2: current audio mode is : STEREO > > v4l2: ioctl set format failed: Invalid argument > > v4l2: ioctl set format failed: Invalid argument > > v4l2: ioctl set format failed: Invalid argument > > ALSA lib pcm_hw.c:1429:(_snd_pcm_hw_open) Invalid value for card > > Error opening audio: Permission denied > > ALSA lib pcm_hw.c:1429:(_snd_pcm_hw_open) Invalid value for card > > Error opening audio: Permission denied > > ALSA lib pcm_hw.c:1429:(_snd_pcm_hw_open) Invalid value for card > > Error opening audio: Permission denied > > v4l2: 0 frames successfully processed, 0 frames dropped. > > This is a udev issue. udev is creating the audio device without permission > for your user to access it. Or you fix udev, or you'll need to run mplayer > as a root (sigh!). Thanks Mauro, running mplayer with sudo let me have the audio working! Now I'm trying to find the root of the problem. Using getfacl I discovered that the following devices created by the em28xx module: /dev/audio2 /dev/dsp2 /dev/snd/controlC2 /dev/snd/pcmC2D0c don't have the correct ACL permissions for the currently logged in user. This ConsoleKit fail is caused by HAL, which doesn't see the new audio device, in fact $ lshal|grep '/dev/snd/controlC' access_control.file = '/dev/snd/controlC1' (string) alsa.device_file = '/dev/snd/controlC1' (string) linux.device_file = '/dev/snd/controlC1' (string) access_control.file = '/dev/snd/controlC0' (string) alsa.device_file = '/dev/snd/controlC0' (string) linux.device_file = '/dev/snd/controlC0' (string) with no appearance of /dev/snd/controlC2 (and the same for the other devices mentioned before). This may be caused by the absence in /sys/class/sound/card2/ of the device symlink? I mean, for the WinTV in /sys/class/sound/card2/ I have: $ ls -l /sys/class/sound/card2/ totale 0 drwxr-xr-x 3 root root 0 11 gen 03:49 audio2 drwxr-xr-x 3 root root 0 11 gen 03:49 controlC2 drwxr-xr-x 3 root root 0 11 gen 03:49 dsp2 drwxr-xr-x 3 root root 0 11 gen 03:49 mixer2 drwxr-xr-x 3 root root 0 11 gen 03:49 pcmC2D0c drwxr-xr-x 2 root root 0 11 gen 04:00 power lrwxrwxrwx 1 root root 0 11 gen 03:49 subsystem -> ../../../../class/sound -rw-r--r-- 1 root root 4096 11 gen 04:00 uevent while e.g. for the webcam I have: $ ls -l /sys/class/sound/card1/ totale 0 drwxr-xr-x 3 root root 0 11 gen 04:04 audio1 drwxr-xr-x 3 root root 0 11 gen 04:04 controlC1 lrwxrwxrwx 1 root root 0 11 gen 04:07 device -> ../../../1-5:1.1 drwxr-xr-x 3 root root 0 11 gen 04:04 dsp1 drwxr-xr-x 3 root root 0 11 gen 04:04 mixer1 drwxr-xr-x 3 root root 0 11 gen 04:04 pcmC1D0c drwxr-xr-x 2 root root 0 11 gen 04:07 power lrwxrwxrwx 1 root root 0 11 gen 04:07 subsystem -> ../../../../../../../../class/sound -rw-r--r-- 1 root root 4096 11 gen 04:07 uevent Thanks again for your help! Nicola _______________________________________________ linux-dvb users mailing list For V4L/DVB development, please use instead linux-media@xxxxxxxxxxxxxxx linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
