If no source exists, you can attempt to play the partial file using VLC with “Keep broken/incomplete files” enabled (Preferences > Input/Codecs). Sometimes the video track is fine, but the DD5.1 audio header is corrupt. Use FFmpeg to extract streams individually:
Untrunc is excellent for repairing damaged h264 video streams. You need a reference file (same resolution, codec, and container).
FFmpeg can remux the file without re-encoding, often fixing minor header corruption: heal20171080pwebdldd51h264rkethd
If your file remains unplayable, the original source material may be permanently damaged. In that case, locating a fresh copy of the same release is the most efficient “heal.” Need help identifying a specific video codec or repair error? Leave a comment below with the exact error message from VLC or MediaInfo.
ffmpeg -i input.mkv -map 0:v -c copy video.h264 ffmpeg -i input.mkv -map 0:a -c copy audio.ac3 Then, remux them into a new container: If no source exists, you can attempt to
untrunc -s reference.mp4 corrupted.mp4 If your file resembles heal20171080pwebdldd51h264rkethd and is smaller than expected (e.g., 200MB instead of 4GB), it’s likely incomplete.
– If from a torrent client (e.g., qBittorrent, Transmission), re-check the file and force re-download missing pieces. Torrent naming often includes group tags like -RkET or similar – check if your client shows 99.8% completion. You need a reference file (same resolution, codec,
ffmpeg -i corrupted.mkv -codec copy -map 0 fixed.mkv