Re: pinnacle 300i driver crashed after first device access

[Devin Heitmueller]

On Fri, Feb 23, 2018 at 2:37 PM, Devin Heitmueller
 wrote:
> On Fri, Feb 23, 2018 at 2:30 PM, Federico Allegretti
>  wrote:
>> i noticed that my pinnacle 300i could accept full resolution settings:
>> v4l2-ctl --set-fmt-video=width=720,height=576
>>
>> only the first time the command is fired.
>>
>> after that, evey time i try to set that resolution with the same
>> command, i get instead only the half vertical resolution:
>> v4l2-ctl --get-fmt-video
>> Format Video Capture:
>> Width/Height  : 720/288
>> Pixel Format  : 'YU12'
>> Field : Bottom
>> Bytes per Line: 720
>> Size Image: 311040
>> Colorspace: SMPTE 170M
>> Transfer Function : Default
>> YCbCr/HSV Encoding: Default
>> Quantization  : Default
>> Flags :

Also, looks like the field format is set to bottom, which would
explain why you're only getting half the lines.  You probably need to
set the field type to interlaced in your --set-fmt-video arguments
(although I don't have the exact syntax right in front of me).

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

Re: pinnacle 300i driver crashed after first device access

[Devin Heitmueller]

On Fri, Feb 23, 2018 at 2:30 PM, Federico Allegretti
 wrote:
> i noticed that my pinnacle 300i could accept full resolution settings:
> v4l2-ctl --set-fmt-video=width=720,height=576
>
> only the first time the command is fired.
>
> after that, evey time i try to set that resolution with the same
> command, i get instead only the half vertical resolution:
> v4l2-ctl --get-fmt-video
> Format Video Capture:
> Width/Height  : 720/288
> Pixel Format  : 'YU12'
> Field : Bottom
> Bytes per Line: 720
> Size Image: 311040
> Colorspace: SMPTE 170M
> Transfer Function : Default
> YCbCr/HSV Encoding: Default
> Quantization  : Default
> Flags :

Did you set the video standard?  All sorts of bad things could happen
if you set the format to 720x576 but the standard is still set to
NTSC.

To get the standards supported, you can run:

v4l2-ctl --list-standards

And then set the standard with "v4l2-ctl -s".  Do this before setting
the format.

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

pinnacle 300i driver crashed after first device access

[Federico Allegretti]

i noticed that my pinnacle 300i could accept full resolution settings:
v4l2-ctl --set-fmt-video=width=720,height=576

only the first time the command is fired.

after that, evey time i try to set that resolution with the same
command, i get instead only the half vertical resolution:
v4l2-ctl --get-fmt-video
Format Video Capture:
Width/Height  : 720/288
Pixel Format  : 'YU12'
Field : Bottom
Bytes per Line: 720
Size Image: 311040
Colorspace: SMPTE 170M
Transfer Function : Default
YCbCr/HSV Encoding: Default
Quantization  : Default
Flags :

I noticed that behaviour when streaming with ffmpeg:

ffmpeg -re -f video4linux2 -i /dev/video0 -f pulse -ar 44100  -strict
experimental -acodec aac -ab 56k -vcodec libx264 -vb 452k -profile:v
high -level 40 -g 100 -f flv
"rtmp://vps222134.ovh.net:8081/publish/first?passsegretapervideostreaming"

first time i get audio and video full frame and no problems.
second time instead ffmpeg drops a lot of frames and fires warnings:

" ... Thread message queue blocking; consider raising the
thread_queue_size option (current value: 8) ..."
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