How to zoom in a few pixels using command line, please?

[Centauri39]

Hi folks!

On Linux Mint 16 MATE, I'm using a USB video grabber together with the latest VLC player.

To start VLC with the wanted options, I created a desktop icon with this code:

Code: Select all

/usr/bin/vlc --fullscreen v4l2:///dev/video0:v4l2-standard=PAL_B :input-slave=alsa://hw:1,0 :v4l2-chroma= :v4l2-input=0 :v4l2-audio-input=-1 :v4l2-width=1920 :v4l2-height=1200 :v4l2-aspect-ratio=16:9 :v4l2-fps=25 :no-v4l2-use-libv4l2 :v4l2-tuner=0 :v4l2-tuner-frequency=-1 :v4l2-tuner-audio-mode=-1 :no-v4l2-controls-reset :v4l2-brightness=-1 :v4l2-brightness-auto=-1 :v4l2-contrast=-1 :v4l2-saturation=-1 :v4l2-hue=-1 :v4l2-hue-auto=-1 :v4l2-white-balance-temperature=-1 :v4l2-auto-white-balance=-1 :v4l2-red-balance=-1 :v4l2-blue-balance=-1 :v4l2-gamma=-1 :v4l2-autogain=-1 :v4l2-gain=-1 :v4l2-sharpness=-1 :v4l2-chroma-gain=-1 :v4l2-chroma-gain-auto=-1 :v4l2-power-line-frequency=-1 :v4l2-backlight-compensation=-1 :v4l2-band-stop-filter=-1 :no-v4l2-hflip :no-v4l2-vflip :v4l2-rotate=-1 :v4l2-color-killer=-1 :v4l2-color-effect=-1 :v4l2-audio-volume=-1 :v4l2-audio-balance=-1 :no-v4l2-audio-mute :v4l2-audio-bass=-1 :v4l2-audio-treble=-1 :no-v4l2-audio-loudness :v4l2-set-ctrls= :live-caching=300

This works great, except for one thing.
I still have a green bar on the lower edge and black bars (even for 16:9 shows) on both sides of my screen.

To move these bars out of the visible area,
I can zoom in a little bit by cutting off 6 pixels from both the top and bottom and 10 pixels from both the left and right,
by opening the video effects of VLC.

But doing this each time I run VLC is very annoying.

That's why I'd like to know, how can I edit the above code to cut off the unwanted bars automatically, please?

[Centauri39]

OK, let my try it differently...

Meanwihle I noticed, when I press ALT+ o once,
the player is zooming in a little bit, which is exacty what I am looking for.

What command line code do I need to perform that action automatically, please?

[erwan10]

alt-o and alt-shift-o scales up or down with a 10% step.

At the command line, you need to switch automatic scaling off (--no-autoscale) and then provide a scale factor (e.g --scale .5 or --scale 1.5).

[Centauri39]

It's working great, now! Thank you very much!

During the last few days, I used the settings of VLC to turn off autoscaling and to set a required scale of 1.36.
But this was working in all videos, even when the video source was not the grabber.

Now, I've added --no-autoscale and --scale 1.36 to my code right after --fullscreen.
As a result of this, everything is great, and autoscaling is enabled again for other video sources than the grabber.