How to tag or add metadata to a video file with GStreamer?

问题

I would like to add metadatas to an MP4 video file with GStreamer:

1. How to do it while recording the file?
2. How to do it when the file is already recorded?
3. Is that possible to check these modifications with GStreamer?

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For example, with FFmpeg, I can add a title to my video with this command line:

ffmpeg -i in.mp4 -metadata title="my title" out.mp4

And then, I check the result with mediainfo:

mediainfo out.mp4

回答1:

I found a way to do it with a debug plugin: taginject

For example, in order to tag a file:

gst-launch-1.0 filesrc location=file.mp4 ! qtdemux ! h264parse ! taginject tags="title=\"MyTitle\",artist=\"MyArtist\"" ! mp4mux ! filesink location=tagged_file.mp4

If you want to check it:

gst-launch-1.0 -t filesrc location=tagged_file.mp4 ! qtdemux ! fakesink

来源：https://stackoverflow.com/questions/41470961/how-to-tag-or-add-metadata-to-a-video-file-with-gstreamer