mp4 subtitle issue of traf/trun
The "traf/trun" issue you mentioned is related to the structure of MP4 (MPEG-4) video files. More specifically, "traf" stands for "Track Fragment," and "trun" stands for "Track Fragment Run." These elements are part of the MP4 file structure used for storing video, audio, and subtitle data. The "traf/trun" box structure is primarily used for handling segmented media files, such as those used in HTTP Live Streaming (HLS). It contains information about the media track's samples, durations, and offsets. For subtitles, it's often associated with WebVTT (Web Video Text Tracks) or other subtitle formats. If you're encountering issues with subtitles in MP4 files, here are some common problems and potential solutions: 1. **Subtitle Format Compatibility**: Ensure that the subtitle format used in your MP4 file is supported by the player or platform you are using. Common formats include WebVTT, SRT, TTML, and more. 2. **Subt