How to Add Source Tag to Video with FFmpeg for Better Tracking

Adding Source Tag to Video with FFmpeg for Better Tracking

FFmpeg is a powerful tool for handling multimedia files. With FFmpeg, you can manipulate audio and video files in various ways, such as converting formats, resizing, and adding subtitles. In this article, we will focus on how to add a source tag to a video using FFmpeg, which can help keep track of the video even if it's not encoded past a certain point.

What is a Source Tag?

A source tag is a metadata field that can be added to a video file to identify its source. This can be useful for tracking the video's origin, especially if it's being distributed or shared online. When a video is encoded, the source tag can be embedded in the file, allowing it to be preserved even if the video is edited or converted to a different format.

Adding a Source Tag with FFmpeg

To add a source tag to a video with FFmpeg, you can use the -metadata option followed by the source_url or source_name tag. For example, the following command adds a source tag with the URL "" to the video file "input.mp4":

Alternatively, you can use the source\_name tag to specify a name for the source, such as the title of the video or the name of the person or organization that created it. For example:

Preserving the Source Tag

If you want to ensure that the source tag is preserved even if the video is encoded past a certain point, you can use the -map_metadata option followed by the value -1. This tells FFmpeg to copy all metadata from the input file to the output file, including the source tag. For example:

With this command, the source tag will be preserved even if the video is encoded using the libx264 codec.

Subtitles and Source Tags

If you want to add subtitles to a video and preserve the source tag, you can use the -filter\_complex option followed by the command to add the subtitles. For example, to add hard-coded subtitles to a video, you can use the following command:

In this command, the subtitles filter is used to add the subtitles from the "subtitles.srt" file. The source tag is added using the -metadata option as before.

• A source tag is a metadata field that can be added to a video file to identify its source.
• To add a source tag to a video with FFmpeg, use the -metadata option followed by the source\_url or source\_name tag.
• To preserve the source tag even if the video is encoded past a certain point, use the -map\_metadata option followed by the value -1.
• To add subtitles to a video and preserve the source tag, use the -filter\_complex option followed by the command to add the subtitles.

References

• FFmpeg documentation: https://ffmpeg.org/documentation.html
• Metadata options in FFmpeg: https://ffmpeg.org/ffmpeg-all.html#Metadata-Options
• Subtitle options in FFmpeg: https://ffmpeg.org/ffmpeg-filters.html#subtitles