Then, again, you may want to specify the rate (FPS=frame per second) of the video input with the “-r” option (after the “-i”). (See FFMPEG’s Color Syntax reference for more details on changing color values). The above command uses the FFMPEG’s “ Pad Filter“, which divides both the original widht and height by 2, round it up to the nearest pixel ( ceil), multiply by 2 again for make it an even number and adding black padding pixels (if needed) up to this number.Ĭolor of the padding can be changed using the option “:color ” at the end, such as follows: Thus, in order to produce a standard h264 file with audio and 1 picture, you may want to include the following filter into your instructions: -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" This is beacause the h264 encoder needs even dimensions. Error initializing output stream 0:1 - Error while opening encoder for output stream #0:1 – maybe incorrect parameters such as bit_rate, rate, width or height” “ width ( or height) non divisible by 2 ( w x h). You could instruct FFMPEG to do the following: ffmpeg -i YOUR-AUDIO.aac -i YOUR-PICTURE.jpg -map 0:a -map 1:v output.mp4īut with the above instructions, you may encounter the following error: It is also possible to rotate videos with FFmpeg: ffmpeg -i example-video.mp4 -vf "transpose=2 " output-rotate.You may want to add an audio track onto a single picture so to create an h264 file, using the audio lenght as the total lenght. The concat parameter here combines your files. Then, run the following command: ffmpeg -f concat -i my-video-list. Enter the list of videos you want to merge into a. Imagine you have multiple clips encoded with the same codec. scale: You can specify the scale sizes you want in your output with this parameterįFmpeg also allows you to combine multiple videos.-vf: This parameter works the same as the -filter:v argument seen above.The following command will resize the video to a size you want: ffmpeg -i example-video.mp4 -vf scale=1920:1080 output-scale.mp4 Sometimes you also need to change the scale of the video. Editing videos doesn't end with just trimming and cutting.
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