16 posts tagged with "Linux"

Getting “/sbin/mount.vboxsf: mounting failed with the error: Protocol error” error with Virtualbox?

1. The fix, re-install Guest Additions.

Getting a green line at the top of each Youtube video? It has recently be caused by a recent Adobe Update, follow the guide below to repair:

1. Right click the Youtube video
2. Click Flash Player Settings
3. Make sure you are in the General settings tab (left most tab)
4. Uncheck “Use Hardware Acceleration”
5. Restart your browser

You do not have enough permission - eeePC Xandros

This usually occurs when the /media folder does not exist and usually occurs after the Full Desktop has been enabled.

1. Open a Terminal
2. Type:** sudo mkdir /media**
3. Press Enter

Getting infos from a video file

ffmpeg -i video.avi

Turn X images to a video sequence

ffmpeg -f image2 -i image%d.jpg video.mpg

This command will transform all the images from the current directory (named

image1.jpg, image2.jpg, etc…) to a video file named video.mpg.

Turn a video to X images

ffmpeg -i video.mpg image%d.jpg

This command will generate the files named image1.jpg, image2.jpg, …

The following image formats are also availables : PGM, PPM, PAM, PGMYUV, JPEG,

GIF, PNG, TIFF, SGI.

Encode a video sequence for the iPod/iPhone

ffmpeg -i source_video.avi input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb

-mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320×180 -title X

final_video.mp4

Explanations:

* Source: source_video.avi

* Audio codec: aac

* Audio bitrate: 128kb/s

* Video codec: mpeg4

* Video bitrate: 1200kb/s

* Video size: 320px by 180px

* Generated video: final_video.mp4

Encode video for the PSP

ffmpeg -i source_video.avi -b 300 -s 320×240 -vcodec xvid -ab 32 -ar 24000

-acodec aac final_video.mp4

Explanations:

* Source: source_video.avi

* Audio codec: aac

* Audio bitrate: 32kb/s

* Video codec: xvid

* Video bitrate: 1200kb/s

* Video size: 320px by 180px

* Generated video: final_video.mp4

Extracting sound from a video, and save it as Mp3

ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 sound.mp3

Explanations:

* Source video: source_video.avi

* Audio bitrate: 192kb/s

* Output format: mp3

* Generated sound: sound.mp3

Convert a wav file to Mp3

ffmpeg -i son_origine.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 son_final.mp3

Convert .avi video to .mpg

ffmpeg -i video_origine.avi video_finale.mpg

Convert .mpg to .avi

ffmpeg -i video_origine.mpg video_finale.avi

Convert .avi to animated gif(uncompressed)

ffmpeg -i video_origine.avi gif_anime.gif

Mix a video with a sound file

ffmpeg -i son.wav -i video_origine.avi video_finale.mpg

Convert .avi to .flv

ffmpeg -i video_origine.avi -ab 56 -ar 44100 -b 200 -r 15 -s 320×240 -f flv

video_finale.flv

Convert .avi to dv

ffmpeg -i video_origine.avi -s pal -r pal -aspect 4:3 -ar 48000 -ac 2

video_finale.dv

or

ffmpeg -i video_origine.avi -target pal-dv video_finale.dv

Convert .avi to mpeg for dvd players

ffmpeg -i source_video.avi -target pal-dvd -ps 2000000000 -aspect 16:9

finale_video.mpeg

Explanations:

* target pal-dvd: Output format

* ps 2000000000 maximum size for the output file, in bits (here, 2 Gb)

* aspect 16:9 : Widescreen

Compress .avi to divx

ffmpeg -i video_origine.avi -s 320×240 -vcodec msmpeg4v2 video_finale.avi

Compress Ogg Theora to Mpeg dvd

ffmpeg -i film_sortie_cinelerra.ogm -s 720×576 -vcodec mpeg2video -acodec mp3

film_terminée.mpg

Compress .avi to SVCD mpeg2

NTSC format:

ffmpeg -i video_origine.avi -target ntsc-svcd video_finale.mpg

PAL format:

ffmpeg -i video_origine.avi -target pal-svcd video_finale.mpg

Compress .avi to VCD mpeg2

Convert file to Matroska container without re-encoding

ffmpeg -i input_file.wmv -vcodec copy -sameq -acodec copy -f matroska

output_file.mkv

NTSC format:

ffmpeg -i video_origine.avi -target ntsc-vcd video_finale.mpg

PAL format:

ffmpeg -i video_origine.avi -target pal-vcd video_finale.mpg

** Multi-pass encoding with ffmpeg**

ffmpeg -i fichierentree -pass 2 -passlogfile ffmpeg2pass fichiersortie-2

1. Open terminal: Tap Ctrl+Alt+T to open the terminal command prompt.
2. Give yourself root access: Type “sudo -i” in terminal, and then hit Enter.
3. Update Aptitude: Type “apt-get update” to update your software.
4. Install KSMServer and Kicker: Type “apt-get install ksmserver kicker.” This will download both of the needed applications to enable the KDE desktop environment.
5. Restart.