ffmpeg: add Arabic translation

[MachiavelliII]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

[sebastiaanspeck]

Hello! I've noticed something unusual when checking this PR:

• The page pages.ar/common/ffmpeg.md is outdated, based on the command contents itself, compared to the English page.

Is this intended? If so, just ignore this comment. Otherwise, please double-check the commits.

@MachiavelliII please fix

[MachiavelliII]

Hello! I've noticed something unusual when checking this PR:

• The page pages.ar/common/ffmpeg.md is outdated, based on the command contents itself, compared to the English page.

Is this intended? If so, just ignore this comment. Otherwise, please double-check the commits.

@MachiavelliII please fix
@sebastiaanspeck It's not outdated; I just changed the direction of some of the command descriptions to match the Arabic language.

[sebastiaanspeck]

Hello! I've noticed something unusual when checking this PR:

• The page pages.ar/common/ffmpeg.md is outdated, based on the command contents itself, compared to the English page.

Is this intended? If so, just ignore this comment. Otherwise, please double-check the commits.

@MachiavelliII please fix
@sebastiaanspeck It's not outdated; I just changed the direction of some of the command descriptions to match the Arabic language.

The tldr-bot never lies, it is definitely outdated

[MachiavelliII]

Hello! I've noticed something unusual when checking this PR:

• The page pages.ar/common/ffmpeg.md is outdated, based on the command contents itself, compared to the English page.

Is this intended? If so, just ignore this comment. Otherwise, please double-check the commits.

@MachiavelliII please fix
@sebastiaanspeck It's not outdated; I just changed the direction of some of the command descriptions to match the Arabic language.

The tldr-bot never lies, it is definitely outdated

Robots cannot lie, but they can be deceived easily.