Package: unpaper Version: 6.1-2 I am using Debian unstable, scanning papers with gscan2pdf which using unpaper to detect borders of the paper.
But this doesn't work because of that message $ gscan2pdf ERROR - [ppm_pipe @ 0x8a8780] Stream #0: not enough frames to estimate rate; consider increasing probesize [image2 @ 0x8ab5a0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [image2 @ 0x8ab5a0] Encoder did not produce proper pts, making some up. ERROR - Error running unpaper: [ppm_pipe @ 0x8a8780] Stream #0: not enough frames to estimate rate; consider increasing probesize [image2 @ 0x8ab5a0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [image2 @ 0x8ab5a0] Encoder did not produce proper pts, making some up.

