-i broken_file.mkv : Directs FFmpeg to read the damaged file.
For files with video, cues are typically created only for video tracks. If a file has no video (audio-only), an index entry is created roughly every 0.5 seconds. mkv index
Halting a download, copying a file to a USB drive that is pulled out early, or experiencing a network drop leaves the file truncated. If the index was supposed to be written at the end of the file, it is lost. -i broken_file
MKVToolNix is the industry-standard suite for Matroska manipulation. Run this command in your terminal: Halting a download, copying a file to a
Note: -movflags +faststart is actually for MP4’s "moov atom," but it works for MKV by shifting the index forward. For MKV-specific cues, prefer mkvmerge.
Look for output like: