An export failed

You see: In Batch Export, a failed line with ffmpeg's error, and a summary such as "79 succeeded, 1 failed". Or a preset marked (encoder not found). Or a filename template refused for a key "which isn't a key this export understands", or with "Check the { } braces." Or, from Export Video, Could not export with the end of ffmpeg's log.

Why: Each clip, and each reel video, is one run of ffmpeg, and ffmpeg's own error is the reason shown. The usual causes are a video that has moved or cannot be read, a full disk, an output folder you cannot write to, or an output file open in another program. A preset needs an encoder your ffmpeg build includes. The filename template is checked before anything is written.

Fix:

1. Read the error on the failed line, or the last lines of Could not export.
2. If a video has moved, relink it. See Source not found when opening a shot list.
3. Check the output folder: that it exists, that you can write there, and that the disk has room.
4. Close any program that has the output file open, such as a video player.
5. Choose Export again. Files that already exist are listed before they are overwritten.
6. For (encoder not found), pick another preset.
7. For a refused template, right-click the field and use Insert Key, so every key is one Shotwork knows.

If that didn't work: In Export Video, tick Detailed (raw ffmpeg output) and render again to see every line ffmpeg writes. Mark at least one shot first. means the shot list has no shots, and No shots to export. that the scope you chose is empty. See Export shots and Export a reel as video.