This is usually done by increasing the number of key frames and disabling some of the more complex encoding settings (eg B-frames).Ĭonvert a video to H.264 with only key-frames and tuned to decode quickly at the expense of file size: ffmpeg -i input.mov -pix_fmt yuv420p -c:v libx264 -crf 18 -tune fastdecode -x264-params "keyint=1" output.mp4Ĭonvert a video to HEVC with only key-frames and tuned to decode quickly at the expense of file size: ffmpeg -i input.mov -pix_fmt yuv420p -c:v libx265 -crf 18 -tune fastdecode -g 1 output.mp4 Using %1 for the input and output file names, this will become the path of the source file: ffmpeg -i %1 -c:v libx264 -pix_fmt yuv420p -y %1-output.mp4įor a use case of fast seeking/scrubbing through the video, it's important to simplify the encoding so that it favours fast decoding over small file size. bat files with FFMPEG commands so that videos can be processed by dragging the files into the batch files. These paramters will limit the output video to 4 seconds, remove the audio track, and change the frame rate to 30 FPS, the size to 1280x702 and with a quality factor of 14 which is quite high quality and will result in a slightly larger file. You can add many parameters to control how videos are encoded. ffmpeg -i input.mov -c:v libx264 -pix_fmt yuv420p -y output.mp4
Any audio in the source video will be compressed with the default audio compression for MP4 which is AAC. Since no other options are specified it will use some default settings for the encoder and based on the input video properties. The video track will be compressed using the H.264 video codec (libx264 is the name of this encoder), with frames encoded in the 4:2:0 format which is the most common. This will convert input.mov to output.mp4. Resourcesīelow is a basic FFMPEG command.
There is a wide range video encoding software but we shall focus on the command-line tool FFMPEG as it is very mature and flexible, however it should be possible to apply the same concepts with others encoders. Alternatively you may want to be able to seek through the video quickly, so you would need to encode with different parameters for that use case. Mostly videos are encoded for the typical case: forward playback with support for slow random seeking. Correct video encoding is important to get the best results for different use cases.
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