c++ - Unable to play video in opencv3? -

-



here code. unable play video file in opencv3.3. beginner opencv. please me.

int main(void) { cv::videocapture capvideo;  cv::mat imgframe;  capvideo.open("c:\\users\\sbv\\documents\\myvideo.avi");  if (!capvideo.isopened())  {                                                      std::cout << "\nerror reading video file" << std::endl << std::endl;           _getch();                        return(0);          }  if (capvideo.get(cv_cap_prop_frame_count) < 1) {     std::cout << "\nerror: video file must have @ least 1 frame";     _getch();     return(0); }  capvideo.read(imgframe);  char chcheckforesckey = 0;  while (capvideo.isopened() && chcheckforesckey != 27) {      cv::imshow("imgframe", imgframe);      if ((capvideo.get(cv_cap_prop_pos_frames) + 1) < capvideo.get(cv_cap_prop_frame_count))              {             capvideo.read(imgframe);                               }     else              {              std::cout << "end of video\n";              break;                                                   }      chcheckforesckey = cv::waitkey(1);               }  if (chcheckforesckey != 27) {                    cv::waitkey(0);                                  }     return(0); }

error coming :

error reading video file.

please solve issue.

the problem quite clear capvideo.open("c:\users\sbv\documents\myvideo.avi");

you try open myvideo.avi in path: 

c:\\users\\sbv\\documents\\myvideo.avi

but file not exist @ path.

quick fix: work in cygwin

capvideo.open("c:/users/sbv/documents/myvideo.avi");

or put myvideo.avi in same directory program.





wiki

Comments

Post a Comment

Popular posts from this blog

Asterisk AGI Python Script to Dialplan does not work -

-
i'm stuck project have check database of sip extension incoming caller id , dial sip extension. below receive when run script on asterisk cli. -- registered sip '9125' @ 192.168.1.102:50142 > saved useragent "zoiper rv2.8.40" peer 9125 [2017-08-22 13:53:33] notice[5095]: chan_sip.c:24558 handle_response_peerpoke: peer '9125' reachable. (17ms / 2000ms) == using sip rtp tos bits 184 == using sip rtp cos mark 5 -- executing [0112617769@from-trunk:1] answer("sip/obitrunk1-0000000d", "") in new stack > 0x1ca50d0 -- probation passed - setting rtp source address 192.168.1.98:16834 -- executing [0112617769@from-trunk:2] agi("sip/obitrunk1-0000000d", "test.py") in new stack -- launched agi script /var/lib/asterisk/agi-bin/test.py args: ['/var/lib/asterisk/agi-bin/test.py'] env line: agi_request: test.py env line: agi_channel: sip/obitrunk1-0000000d env line: agi_language: en env line: a
Read more

python - Read npy file directly from S3 StreamingBody -

-
i have many .npy (numpy) , .json files saved in s3, need download , load these files. for json files downloading files , loading dictionary using following code: obj = s3.object(bucket, key) response = obj.get() body = response['body'].read().decode('utf-8') data = json.loads(body) that way avoid writing .json file disk , reading it. now want same .npy files, equivalent? currently downloading file, saving temp file on disk , loading np.load avoid if possible. following https://stackoverflow.com/a/28196540/3509999 : obj = s3.object(bucket, key) io.bytesio(obj.get()["body"].read()) f: # rewind file f.seek(0) arr = np.load(f) wiki
Read more

kotlin - Out-projected type in generic interface prohibits the use of metod with generic parameter -

-
i start using kotlin , defined interface this: interface aadapter<vh : recyclerview.viewholder> { fun oncreateaviewholder(parent: viewgroup): vh fun onbindaviewholder(v: vh, position: int) } and when try use on code: class klasa ( private val adapter: aadapter<*> ) { fun dosth(){ //... val vh = this.adapter.oncreateaviewholder(parent) //on below line error adapter.onbindaviewholder(v, position) //... } } i error out-projected type 'aadapter<*>' prohibits use of 'public abstract fun onbindaviewholder(v: t, position: int): unit i tied add "in" or "out" definition i'm confused. how allow it. replace aadapter<*> aadapter<recyclerview.viewholder> . class klasa ( private val adapter: aadapter<recyclerview.viewholder> ) { // ... because have declared aadapter has type parameter vh type subclass of recyclerview.
Read more