parallel: Warning: $HOME not set. Using /tmp
caught exception: 
Precondition violation!
did not find a matching file type.
(/build/libvigraimpex-Wd_WgR/libvigraimpex-1.10.0+dfsg/src/impex/codecmanager.cxx:234)

convert: unable to open image `/tmp/frame-096-0000.tif': No such file or directory @ error/blob.c/OpenBlob/2712.
convert: no images defined `frame-096.png' @ error/convert.c/ConvertImageCommand/3210.
rm: cannot remove '/tmp/frame-096-0000.tif': No such file or directory
caught exception: 
Precondition violation!
did not find a matching file type.
(/build/libvigraimpex-Wd_WgR/libvigraimpex-1.10.0+dfsg/src/impex/codecmanager.cxx:234)

convert: unable to open image `/tmp/frame-097-0000.tif': No such file or directory @ error/blob.c/OpenBlob/2712.
convert: no images defined `frame-097.png' @ error/convert.c/ConvertImageCommand/3210.
rm: cannot remove '/tmp/frame-097-0000.tif': No such file or directory
caught exception: 
Postcondition violation!
error in png_read_row(): Read Error
(/build/libvigraimpex-Wd_WgR/libvigraimpex-1.10.0+dfsg/src/impex/png.cxx:381)

convert: unable to open image `/tmp/frame-095-0000.tif': No such file or directory @ error/blob.c/OpenBlob/2712.
convert: no images defined `frame-095.png' @ error/convert.c/ConvertImageCommand/3210.
rm: cannot remove '/tmp/frame-095-0000.tif': No such file or directory