FFmpegを使った動画・音声処理に関する記事。
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Following the recently added zoom feature, we have added a BGM feature to Make Demo GIF / MP4. By adding background music to silent demo videos, you can create more engaging MP4s for your viewers.
Today I'm releasing Colab Mosaic Clip — an open-source tool that applies a mosaic or solid-color mask to any time range and region of a video, entirely through a GUI, and exports the result as MP4. It runs ffmpeg and Pillow on Google Colab, so everything from specifying the time range to placing mosaic regions and exporting the final file is handled inside the notebook UI.
Make Demo GIF / MP4, released earlier this month, now includes a zoom feature. When you want to draw attention to a specific interaction in a screen recording, simply dropping in a GIF or MP4 does not always communicate what matters. This update adds an optional zoom effect that smoothly magnifies any area of the video to highlight button clicks, form inputs, or other key UI moments.
Today I'm releasing Make Demo GIF / MP4, an open-source tool that converts screen recordings into GIFs or MP4s optimized for GitHub READMEs and social media. It runs FFmpeg on Google Colab, letting you merge multiple videos, tune quality, and adjust playback speed — all through a notebook UI, no command line required.