Same goes with Sony PSP: The command line below takes a source video file and creates an output file compatible with Sony PSP. You can easily convert a video for iPhones and older iPods using this command: 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 320x180 -title X final_video.mp4 Encode a Video Sequence for the iPod/iPhone ss indicates the starting time, and -t indicates the duration. In the example above, we are cutting out a part starting at 00:00:30 into the original file with a 5 seconds length. This can be done super easily: ffmpeg -ss 00:00:30 -i orginalfile.mpg -t 00:00:05 -vcodec copy -acodec copy newfile.mpg The same works with images as well: ffmpeg -i input.jpg -vf scale=320:240 output_320x240.png Extract a Portion of a VideoĪnother very common operation on video files is to extract a specific portion of a given video. Using the -vf scale filter, it is possible to resize videos to a desired size: ffmpeg -i input.avi -vf scale=320:240 output.avi x and y specify the top left corner of the output rectangle.out_h is the height of the output rectangle.out_w is the width of the output rectangle.FFmpeg provides a crop filter for this specific purpose: ffmpeg -i input.mp4 -filter:v "crop=out_w:out_h:x:y" output.mp4
ffmpeg -i video.mpg image%d.jpg Crop a Video FileĬropping is a very common operation in video editing. The following image formats are available: PGM, PPM, PAM, PGMYUV, JPEG, GIF, PNG, TIFF, SGI. This command will generate imagess named image1.jpg, image2.jpg, etc, from a given video file. ffmpeg -f image2 -i image%d.jpg video.mpg Convert a Video to X Images This command will transform all the images from the current directory (named image1.jpg, image2.jpg, etc…) to a video file named video.mpg. You can easily obtain a lot of information on a given video file with the following command line instruction: ffmpeg -i video.avi Convert Images To a Video Sequence The commands contained in this guide describes how to perform various tasks as such as video files conversion, audio file sound extraction, encoding files for iPod or PSP, converting a video to a gif file, and more. Please refer to the official documentation if you need any help to install FFmpeg.
The program and its source code can be downloaded here.
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