The stream module seems strange to me. When I compile my avi demuxer with -d:
release it throws IO errors, but not without: The same file is read in both
release and debug mode.
This is the part in which the error occurs:
proc read_video_frame*(avi: Avi; vidbuf: ptr UncheckedArray[byte];
video_pos: int; isKeyframe: var bool): int =
var n: int
if avi.video_index.isNil:
throw Exception: "AVI_ERR_NO_IDX"
if video_pos < 0 or video_pos >= avi.video_frames:
return -1
n = avi.video_index[video_pos].len
isKeyframe = avi.video_index[video_pos].key == 0x00000010
echo fmt" {video_pos} / {avi.video_frames} position"
avi.stream.setPosition(avi.video_index[video_pos].pos) ## <- this line
produces the error in release mode
if avi.stream.readData(vidbuf, n) != n:
throw Exception: "AVI_ERR_READ"
return n
Run
In release it reads some of frames but after a time it throws errors. Output
with -d:release:
...
...
159 / 424 position
isKey: true readCount: 364446
160 / 424 position
isKey: true readCount: 363571
161 / 424 position
isKey: true readCount: 361489
162 / 424 position
io.nim(138) raiseEIO
Error: unhandled exception: cannot set file position [IOError]
Run
Maybe I'm missing something? Is my code buggy or is it a problem with stream
module?
Maybe someone can push me in the right direction
