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-   Nokia N800 (https://talk.maemo.org/forumdisplay.php?f=25)
-   -   Here is a working VLC Media Player!! (https://talk.maemo.org/showthread.php?t=14126)

lokidor 2008-05-28 19:11
Re: Here is a working VLC Media Player!!
 
Maybe I'm wrong but for the microphone I tried the osso-dsp-plugin-alsa package after reading this http://hg-mirror.alsa-project.org/al...c/README-maemo

As mentionned :

"ALSA native applications can run over DSP Gateway and use DSP PCM task nodes"

I tried this :

cvlc
Code:
v4l2:///dev/video0:chroma="UYVY":width=320:height=240:adev=default
But vlc crash with a dbus error when opening audio device :

Code:
[00000645] v4l2 demux debug: added new video es UYVY 320x240
[00000644] main input debug: selecting program id=0
[00000645] v4l2 demux debug: opening 'default' as audio
process 1742: Applications must not close shared connections - see dbus_connection_close() docs. This is a bug in the application.
  D-Bus not built with -rdynamic so unable to print a backtrace
Aborted
I don't know if it's a vlc or an alsa issue but to be sure that this plugin works I built and tried the aplay/arecord commands and I can heard my voice with :

Code:
arecord -Ddefault --format=S16_LE foo.wav
aplay -Ddefault foo.wav
But I noted that sometimes the arecord command fails also with a dbus error.

Maybe some dbus guru could help.

Lokidor

qole 2008-05-28 23:56
Re: Here is a working VLC Media Player!!
 
Here's an interesting update to the audio problem. I read this in another thread:

Quote:
Originally Posted by tz1 (Post 186624)
Actually there is an ALSA device (libaudio to be more specific) mapped as arecord (and aplay) will work, but it seems that nothing else can use the DSP, and you have to ask it nicely (a DSP supported format, rate, etc.) which gstreamer does...
So I tried to get VLC to ask more "nicely":

Code:
cvlc v4l2:///dev/video0:chroma="UYVY":width=320:height=240:adev=default:audio-method=2:samplerate=8000
There are absolutely no errors (even using -vvv), VLC runs fine, it thinks it's got audio coming in, I can wave at myself on the screen... but no audio comes out. When I try streaming and then use mplayer http://localhost:7070 in another terminal, mplayer says there's no audio being streamed.

By the way, I've installed the full VLC package. It's annoying not having video out.

EDIT: I wonder if we need to ask even more nicely. How do we get VLC to use the S16_LE audio format?

lokidor 2008-05-29 07:50
Re: Here is a working VLC Media Player!!
 
I will check the audio format in the vlc code

Lokidor

tigerszheng 2008-05-29 10:28
Re: Here is a working VLC Media Player!!
 
hi,there:

Now, can't download the file from "http://www.filecrunch.com/file/~euhmyn".

Could you upload it again?

Thx

qwerty12 2008-05-29 10:30
Re: Here is a working VLC Media Player!!
 
Read down from #95.

qole 2008-05-29 16:41
Re: Here is a working VLC Media Player!!
 
So, qwerty12, I've tried out your kernel. I've had lots of fun with the rotation, and it seems to me that my tablet boots a bit faster with the high speed SD, but I could be imagining it.

The "EIO not returned in VIDIOC_DQBUF" patch certainly stops the errors, but I'm not sure it is a good solution. A/V sync in Videocamera (look in the Garage) and with a standard GStreamer pipeline is pretty dismal; I think it has actually gotten worse with this patch. I don't know what a better solution would be here, though... I'll keep playing around; I still think there's hope.

As for the V4L1 patch: how do I use it? There's no v4l1 device created (usually /dev/video) and /dev/video0 is not recognized as a v4l device by VLC 0.8.6...

Sigh. Thanks for the kernel anyway!

qwerty12 2008-05-29 16:50
Re: Here is a working VLC Media Player!!
 
Quote:
Originally Posted by qole (Post 186925)
So, qwerty12, I've tried out your kernel. I've had lots of fun with the rotation, and it seems to me that my tablet boots a bit faster with the high speed SD, but I could be imagining it.

The "EIO not returned in VIDIOC_DQBUF" patch certainly stops the errors, but I'm not sure it is a good solution. A/V sync in Videocamera (look in the Garage) and with a standard GStreamer pipeline is pretty dismal; I think it has actually gotten worse with this patch. I don't know what a better solution would be here, though... I'll keep playing around; I still think there's hope.

As for the V4L1 patch: how do I use it? There's no v4l1 device created (usually /dev/video) and /dev/video0 is not recognized as a v4l device by VLC 0.8.6...

Sigh. Thanks for the kernel anyway!

Hmm, thanks for the report, I'll have to boot into a kernel with that patch removed and see if it's slower too :/

No idea, sorry, V4l1 is enabled, I think it's up to the driver which V4l it reports itself as.

BTW: If you do end up flashing another kernel to remove the "EIO not returned in VIDIOC_DQBUF" patch, I recommend flashing fanoush's rotation kernel. That has the fixed rotation and the SD high speed without any extreme stuff like my kernel.

qole 2008-05-29 17:02
Re: Here is a working VLC Media Player!!
 
Quote:
Originally Posted by qwerty12 (Post 186929)
BTW: If you do end up flashing another kernel to remove the "EIO not returned in VIDIOC_DQBUF" patch, I recommend flashing fanoush's rotation kernel. That has the fixed rotation and the SD high speed without any extreme stuff like my kernel.
Just a question; if I do an on-tablet flash of my kernel from a SD partition cloned system, does that flash the kernel on all the partitions, or just the partition that was running at the time of the flash?

qwerty12 2008-05-29 17:06
Re: Here is a working VLC Media Player!!
 
I'm 95% sure it's on all the partitions (kernel has fixed partition on /dev/mtd2 iirc) , you can verify next time you boot into the flash by running uname -a.

My kernels say BST, fanoush's say CEST and Nokia ones say EEST.

lokidor 2008-05-29 21:23
Re: Here is a working VLC Media Player!!
 
Quote:
Originally Posted by qole (Post 186749)
EDIT: I wonder if we need to ask even more nicely. How do we get VLC to use the S16_LE audio format?
The S16_LE audio format is hard coded in vlc so no problem with it

But looking at the code I found that the audio-method command is broken in vlc-git, if you want to use it you have to omit the "=" character... :confused:.

With this bug vlc doesn't even try to load the alsa stuff and that's why you don't have the dbus error.

However after some code modifications I made a little step forward.

With my test version I have no longer the dbus error but still no sound (error in the alsa dsp plugin at the start of transcoding)... :(

I'll do other tests this weekend.

lokidor


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