Using concat with a txt file has one catch, all the MP4s must have the exact codec, framerate, resolution, etc. An example text file is shown below (file.txt): Then run the following command to load the txt file to create a single file from the list: But how can you join multiple MP4 files that […]
Looping a section of a video can be useful for presentations or advanced video editing. In this example the input.mp4 is a 5 minute long video with the requirement that after the 1 minute mark, the video will loop 10 times. In the requirements for this example, it was stated after the 1 minute mark […]
I saw this question on Reddit and started messing with the effects recommended and totally liked the effect seen in the video below: Here’s the full script using the tmix filter: What you’ll notice here is the more frames you set the more motion effect is applied. The weights must equal the same number of […]
Stitching videos generated by the segment filter is accomplished using the concat filter. See Question, “How to Splice a Video into Segments?”, for more details on segmenting video output. Imagine you’ve generated a bunch of segments for a stream and now you need to combine them back together as the packages arrive at the client. […]
Splicing a video (or dividing a video into multiple segments) is a common way to break large files into smaller parts. This is commonly found in streaming but can also be used to break up a video into smaller clips. Here is a basic example where the input is a 20 second clip with the […]
The last two questions covered trimming the start of a video and trimming the end of a video, but what does the command look like combined? In this example, the input file is 5 minutes long with the requirement of 15 seconds to be removed from the start and 1 minute to be removed from […]
Trimming a couple of seconds, minutes or hours off the end of a video is easy but again requires a different understanding of time in FFmpeg. Trimming from the end of an MP4 uses the argument -t or duration with no seeking. Tip: The duration must be set before the input else FFmpeg applies the […]
Trimming a few seconds, minutes or hours from a video is simple but requires an understanding of the seeking and duration options. In this example, the input file is 5 minutes long with a 15 second introduction that needs to be removed. It’s important to identify these two numbers because trimming requires tricky subtraction. Let’s […]
Although not a conversion to another format, compression is one of the most asked questions about MP4 files with FFmpeg. People are constantly looking for ways to reduce file size while keeping quality generally the same. This is easily done with -crf or Constant Rate Factor. -crf lowers the average bitrate and retains quality. -crf […]
In the previous video format conversions the formats supported audio without any additional encoding. A Graphic Interchange Format or GIF is a bitmap image format without an audio component. GIFs have been around since the late 80s and are still used to this day on web forums, Discord, text messages and everywhere in between. Because […]