oozliuoo/c_ffmpeg_scale_demo

quick demo for ffmpeg swscale using C

C

c_ffmpeg_scale_demo

Quick demo for ffmpeg swscale using C

Install and compile ffmpeg (On Mac)

Follow the official documentation to compile and install ffmpeg in your system
After installation (i.e. executing make && sudo make install), please quickly check the path /usr/local/lib/pkgconfig to make sure that all ffmpeg libs are presented
Execute the following command line to set env variable:

export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH

After the above three steps, you should be able to run the demo

Running demo

Compile the demo by running make under this dir
Configure parameters passed to the demo program in run.sh, as explained below:

--src: the source .yuv file name
--dst the destination .yuv file name
--sw: frame width of the source file
--sh: frame height of the source file
--dw: frame width of the destination file
--dh: frame height of the destination file
--framenum: number of frame this .yuv file contains, if there is only one frame, then simply pass 1

NOTE: the sample file in this repository has width = 176 and height = 144, and framenum == 8 3. Execute the demo by running ./run.sh.

Verifying result

Download YUView, and run it to open the source and the destination file. Then you could verify that the resolution has been changed.

References