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Agg appears to cut off the last column of the recording? #316
Description
Describe the bug
When I record with asciinema rec, and play it with asciinema play, it shows all the columns that were recorded. When I pass it to agg, it cuts out the last column for some reason
To Reproduce
Steps to reproduce the behavior:
asciinema rec test- `agg test test.gif
- See error
Expected behavior
It should not cut out the last column
Versions:
- OS: Arch Linux x86_64
- agg: 1.7.0
Additional context
Here's an example of a generated gif:
And the recording that generated it:
You will notice that at the bottom right corner, in the recording it shows the number of lines, but in the gif, that's cut out for some reason.
Activity
ku1ik commentedon May 5, 2026
I found out that this is related to cursor positioning at the edge with auto-wrap mode off, followed by EL sequence.
I replayed your recording in several terminal emulators, all set to 96x25 size (the same as your recording) to see how they handle this case:
It's 50/50... 😅
avt (agg's virtual terminal) typically follows the majority's behavior, and in this case there isn't a clear consensus between terminal emulator implementers it seems. I don't remember if avt's current behavior was intentional or just happened to be implemented like this....
Anyway, there isn't a good answer here I'm afraid.