If the videos contain audio streams, the codec (aac), codec profile (LC), sampling rate or frequency (44100 Hz), channel layout (stereo) and sample format (fltp) should match. These are the stream properties that need to be the same to use the concat demuxer. The video streams of the videos above have the same codec (h264), codec profile (Main), pixel format (yuv420p), and resolution (1920x1080). The screenshots below show the information of an MP4 video, input1.mp4, and a MOV video, input2.mov which have the same video streams. The video container formats can be different but their streams must be the same. The second video, input_2.mp4 follows the first video immediately. The merged video starts with the first video, input1.mp4 which is 9-seconds long. It makes FFmpeg omits the decoding and encoding process and does only demuxing and muxing.Īs this method allows you to " stream copy" the files instead of re-encoding them, the concatenation is very fast.īear Tip □ : You can omit -safe 0 if you are using relative paths. The default value 1 will reject absolute paths in the text file. safe 0 is added so that any file name will be accepted. You can use relative paths which refer to the location that is relative to your current directory or absolute paths like the example below:įfmpeg -f concat -safe 0 -i join_video.txt -c copy output_demuxer.mp4 txt file and list the paths of the video files that you want to merge. However, they can be wrapped in different container formats such as. To use the concat demuxer, the video files must have the same streams. Each video starts where the previous one finishes. The concat demuxer reads a list of video files from a text file and demuxes them in sequence. Merging Video Files with the Same Codecs Method 1. There are two methods to merge video files with the same codecs and a method for video files with different codecs. The video above is compressed using a H.264 codec with a Main Profile.Īlthough the names of a container format and a video codec might sound similar (MP4 and MPEG-4), they are actually different.Īfter running the command above to check the codecs of your videos, you can decide which method you should use to merge the video files. The video codec can be found in the information printed : You can check the codec of your video by running this command in the terminal: Some of the most common and popular video codecs are H.264 (MPEG-4 Part 10), H.262(MPEG-2 Part 2), and Motion JPEG (MJPEG). The compressed data format usually conforms to a standard video coding format or video compression format. The word codec comes from the words en coder and decoder.Ī video encoder compresses a video file while a video decoder decompresses it. What is a Video CodecĪ video codec is a tool that compresses or decompresses a video file. The data contained in a video file are compressed and decompressed using a codec. Some of the most used video container formats are MP4, MOV, MKV, etc. The container format of a video can be found in its file name. The container format of a video can also be known as the file extension. A video container contains the video streams, audio streams, captions, and other metadata of a video file. What is a Container FormatĪ container format is the format of a video container. The types of video codes and the container formats of the videos will determine which method we will use to merge the video files. As FFmpeg offers flexibility in manipulating media files, we can use it to merge video files using different methods.īefore learning how to use FFmpeg to merge video files, it is important to know what is a container format and what is a video codec. It can also decode, encode, transcode, mux, demux, stream, filter and play pretty much any media file in any format. For reference, the version of FFmpeg used in this tutorial is v5.0.1.įFmpeg is a complete, cross-platform solution to record, convert and stream audio and video. Your browser does not support HTML video. You will be able to merge input1.mp4 and input2.mp4 using FFmpeg at the end of this tutorial: In this tutorial, I will show you some examples of using the FFmpeg command line editor to merge video files. Other than using video editing softwares that often require a paid license, you can also use FFmpeg which is completely free and combines the best free software options available. Video editing is a part of the video production process that involves tasks like arranging and merging videos, adding graphics, adding subtitles, and more. With the growing number of video viewers, there is no doubt that the demand for video editing will increase. YouTube is expected to have nearly 2.85 billion global users by 2025.
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