{"record":{"id":"94426dd105f9bc3a","repo":"Yalantis/uCrop","slug":"load-video-file-s-no-opened-video-stream-a","errorCode":null,"errorMessage":"load_video() : File '%s', no opened video stream associated with filename found.","messagePattern":"load_video\\(\\) : File '(.+?)', no opened video stream associated with filename found\\.","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"ucrop/src/main/jni/CImg.h","lineNumber":67351,"sourceCode":"          }\n      } else index = last_used_index;\n      cimg::mutex(9,0);\n\n      // Release stream if needed.\n      if (!step_frame || (index>=0 && positions[index]>first_frame)) {\n        if (index>=0) {\n          cimg::mutex(9);\n          captures[index]->release();\n          delete captures[index];\n          captures[index] = 0;\n          positions[index] = 0;\n          filenames[index].assign();\n          if (last_used_index==index) last_used_index = -1;\n          index = -1;\n          cimg::mutex(9,0);\n        } else\n          if (filename)\n            cimg::warn(_cimglist_instance\n                       \"load_video() : File '%s', no opened video stream associated with filename found.\",\n                       cimglist_instance,filename);\n          else\n            cimg::warn(_cimglist_instance\n                       \"load_video() : No opened video stream found.\",\n                       cimglist_instance,filename);\n        if (!step_frame) return *this;\n      }\n\n      // Find empty slot for capturing video stream.\n      if (index<0) {\n        if (!filename)\n          throw CImgArgumentException(_cimglist_instance\n                                      \"load_video(): No already open video reader found. You must specify a \"\n                                      \"non-(null) filename argument for the first call.\",\n                                      cimglist_instance);\n        else { cimg::mutex(9); cimglist_for(filenames,l) if (!filenames[l]) { index = l; break; } cimg::mutex(9,0); }\n        if (index<0)","sourceCodeStart":67333,"sourceCodeEnd":67369,"githubUrl":"https://github.com/Yalantis/uCrop/blob/f788b534b48c144edf786c8cddbf0e029e637804/ucrop/src/main/jni/CImg.h#L67333-L67369","documentation":"CImgList<T>::load_video() warns that no video capture stream could be opened for the given filename. The filename slot in the internal stream table is released and capture proceeds with fewer (or no) streams, so frames from that file will never be produced.","triggerScenarios":"Calling load_video(filename,...) where the file cannot be opened/decoded as a video (missing file, unsupported codec, FFmpeg/OpenCV backend not able to read it); passing a filename while no video backend is compiled in; a previously-opened stream for that index was closed.","commonSituations":"Missing or misspelled video file path; codec not supported by the installed FFmpeg/OpenCV; calling save_video/load_video features without cimg_use_opencv or ffmpeg available; network streams that failed to connect.","solutions":["Verify the file exists and is readable at the given path","Confirm the file decodes with ffprobe/ffmpeg or cv::VideoCapture before calling load_video","Ensure a video backend is compiled in (cimg_use_opencv) and FFmpeg/OpenCV libs are installed","Install the missing codec/system libraries (e.g. libavcodec, opencv-videoio) for that container format"],"exampleFix":"// before\nframes.load_video(\"movie.mp4\", 30);\n// after\nif (cimg::fsize(\"movie.mp4\") > 0 && std::system(\"ffprobe movie.mp4\") == 0) {\n  frames.load_video(\"movie.mp4\", 30);\n} else {\n  // handle unreadable/undecodable video\n}","handlingStrategy":"validation","validationCode":"if (cimg::fsize(filename) <= 0) { /* file missing/unreadable */ return; }\nframes.load_video(filename, fps);","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Probe the file with ffprobe/ffmepg or OpenCV before load","Ensure video backend (cimg_use_opencv / ffmpeg) is available","Check the returned list is non-empty after load"],"tags":["cimg","video","file-not-found","codec"],"backgroundTag":"file-not-found","analyzedSha":"f788b534b48c144edf786c8cddbf0e029e637804","analyzedAt":"2026-09-08T08:36:04.887Z","contentChangedAt":"2026-09-08T08:36:04.887Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}