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[mpeg4 @ 000001ba830e2180] timebase 1/180000 not supported by MPEG 4 standard, the maximum admitted value for the timebase denominator is 65535
[ERROR:[email protected]] global /build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp (2822) open Could not open codec mpeg4, error: Unspecified error
[ERROR:[email protected]] global /build/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp (2839) open VIDEOIO/FFMPEG: Failed to initialize VideoWriter
我确认已经提供了Bug复现步骤、代码改动说明、以及环境信息,确认问题是可以复现的。I confirm that the bug replication steps, code change instructions, and environment information have been provided, and the problem can be reproduced.
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问题确认 Search before asking
Bug组件 Bug Component
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Bug描述 Describe the Bug
pipeline.py在解析camera_id和rtsp参数,并运行显示时有部分问题
使用的命令如下
问题一:逻辑错误
cv2.imshow
不会正常显示界面在pipeline在
_parse_input
函数中解析出self.input=0
或self.input="rtsp://admin:[email protected]:8554/live"
;之后设置 predictor.filename,在

set_file_name
函数中,使predictor.filename=0
(if type(path) == int)或predictor.filename=live
(elif path is not None 经过os.path分割),并不会在 else 判断里# use camera id
而在cv2.imshow的两处代码之前有个判断为
if self.file_name is None: # use camera_id
这个判断会导致
cv2.imshow
不会正常运行显示问题二:
video_out_name
和out_path
命名规则在多个rtsp流数据时可能会出现相同命名当我以下rstsp流时
在
predictor_item.set_file_name
时会使用self.file_name = os.path.split(path)[-1]
,都会使self.file_name=live
,这会导致在命名规则里使用相同self.file_name
得到相同的video_out_name
,使输出文件路径重复。问题三:rtsp流获取
fps
属性,可能不准确当我使用 IP摄像头app 传输rtsp流数据发现,我设置的帧率为
30 FPS Max
,通过fps = int(capture.get(cv2.CAP_PROP_FPS))
获取到的fps为180000,导致cv2.VideoWriter
初始化失败,报错。我查资料发现似乎OpenCV与IP摄像头的RTSP流有可能存在问题,出现未正确传递FPS信息。在我手动设置fps值后能正常使用
问题四:视频图像队列读取逻辑问题
这个问题在 #7827 就出现过,但是issues里还是很多人出现了。当我使用摄像头长时间未检测到物体时,可能会出现消耗帧的速度比读取摄像头帧的速度快,帧队列被读空,使主线程的循环判断while (not framequeue.empty())提前终止,而
capturevideo
子线程并未被设置为守护线程,导致主线程结束,而子线程继续持续运行,使进程卡死。复现环境 Environment
Bug描述确认 Bug description confirmation
是否愿意提交PR? Are you willing to submit a PR?
The text was updated successfully, but these errors were encountered: