Re: [Linphone-developers] no image while local video capturing.

[Simon Morlat]

Did you tested your camera under linux with another camera software, for 
example xawtv ?
This error:
> ortp-error-VIDIOC_STREAMON failed: Invalid argument
shows that the driver refuses to start video capture for an unknown reason.
Maybe it's a bug in the driver, maybe it's a bug in linphone but linphone 
works well with other cameras.
The VIDEOC_STREAMON command is part of the Video4Linux 2 interface.
Maybe your driver has also a version 1 interface that works better.
To force linphone to use the version 1 interface of video4linux, you can 
modify the code in mediastreamer2/src/msv4l.c as follows:
at top of this file, just after "#include "mediastreamer-config.h"", add:
#undef HAVE_LINUX_VIDEODEV2_H
and rebuild.

Simon


Le Tuesday 07 August 2007 09:19:12 address@hidden, vous avez écrit :
> I cross compiled linphone-1.6.0 to i.MX31 successfully,Now I can run
> linphone well in graphic mode.
>
> But I can not receive local image.The vedio window is black.
> I got the following messages with command line : linphonec -V -d 6
>
> INFO: no logfile, logging to stdout
> ortp-message-oRTP-0.13.0 initialized.
> ortp-message-Registering all filters...
> ortp-message-Registering all soundcard handlers
> ortp-message-Card ALSA: default device added
> ortp-message-Card ALSA: PMIC-audio added
> ortp-message-Card OSS: /dev/dsp added
> ortp-message-Card OSS: /dev/dsp added
> ortp-message-Loading plugins
> ortp-message-Cannot open directory /usr/lib/mediastreamer/plugins: No such
> file or directory ortp-message-ms_init() done
>
> | ERROR | <eXutils.c: 131> Error in connect: Network is unreachable
> |WARNING| <eXutils.c: 139> Could not find interface to reach 15.128.128.93
>
> Ready
>
> | INFO1 | <eXosip.c: 333> eXosip: Reseting timer to 15s before waking up!
>
> linphonec> ortp-message-v4l_start: open, fd=8
> ortp-message-v4lv2: YUV420P choosen
> ortp-message-Device is a video4linux V2 one.
> ortp-message-ms_filter_link: MSV4l:0x262a0,0-->MSPixConv:0x26478,0
> ortp-message-ms_filter_link: MSPixConv:0x26478,0-->MSVideoOut:0x263f0,0
> ortp-message-v4l_thread starting
> ortp-error-VIDIOC_STREAMON failed: Invalid argument
> ortp-message-Using yuv overlay.
>
> | INFO1 | <eXosip.c: 333> eXosip: Reseting timer to 15s before waking up!
>
> so I tried to fix this, I uncomment these lines in file
> mediastream2/src/msv4l.c
>
> /*      for (i = 0; i < s->frame_max; ++i) {
>                 struct v4l2_buffer buf;
>                 memset(&buf,0,sizeof(buf));
>                 buf.type        = V4L2_BUF_TYPE_VIDEO_CAPTURE;
>                 buf.memory      = V4L2_MEMORY_MMAP;
>                 buf.index       = i;
>                 if (-1==ioctl (s->fd, VIDIOC_QBUF, &buf)){
>                         ms_error("VIDIOC_QBUF failed: %s",strerror(errno));
>                 }
>         }
> */
>
> But there is no local image neither in the video window but filled with
> color green.
>
> this time I got these messages:
> INFO: no logfile, logging to stdout
> ortp-message-oRTP-0.13.0 initialized.
> ortp-message-Registering all filters...
> ortp-message-Registering all soundcard handlers
> ortp-message-Card ALSA: default device added
> ortp-message-Card ALSA: PMIC-audio added
> ortp-message-Card OSS: /dev/dsp added
> ortp-message-Card OSS: /dev/dsp added
> ortp-message-Loading plugins
> ortp-message-Cannot open directory /usr/lib/mediastreamer/plugins: No such
> file or directory ortp-message-ms_init() done
>
> | ERROR | <eXutils.c: 131> Error in connect: Network is unreachable
> |WARNING| <eXutils.c: 139> Could not find interface to reach 15.128.128.93
>
> Ready
>
> | INFO1 | <eXosip.c: 333> eXosip: Reseting timer to 15s before waking up!
>
> linphonec> ortp-message-v4l_start: open, fd=8
> ortp-message-v4lv2: YUV420P choosen
> ortp-message-Device is a video4linux V2 one.
> ortp-message-ms_filter_link: MSV4l:0x262a0,0-->MSPixConv:0x26478,0
> ortp-message-ms_filter_link: MSPixConv:0x26478,0-->MSVideoOut:0x263f0,0
> ortp-message-v4l_thread starting
> ortp-message-videoout
> ortp-message-Using yuv overlay.
> ortp-warning-We are late of 593 miliseconds.
> ortp-warning-We are late of 546 miliseconds.
> ortp-warning-We are late of 960 miliseconds.
> ...
>
> I tested my video camera with the factory's testing program , the cam is OK
> .
>
> Please help me.
> Thanks in advance.
>
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