{"id":1241,"date":"2011-07-17T20:22:04","date_gmt":"2011-07-17T18:22:04","guid":{"rendered":"https:\/\/alax.info\/blog\/?p=1241"},"modified":"2011-07-19T08:15:40","modified_gmt":"2011-07-19T06:15:40","slug":"using-ip-video-source-programmatically-as-a-standalone-directshow-video-source-filter-for-jpeg-and-m-jpeg-ip-cameras","status":"publish","type":"post","link":"https:\/\/alax.info\/blog\/1241","title":{"rendered":"Using IP Video Source programmatically as a standalone DirectShow Video Source Filter for JPEG and M-JPEG IP Cameras"},"content":{"rendered":"

Recent IP Video Source<\/a> class\/module is not limited to use via registration as a video input\/capture\/source device. The filter is also registered as a regular filter and can be used programmatically in a regular way: CoCreateInstance<\/a>, AddFilter<\/a> etc.<\/p>\n

A C++ code snippet below shows how to import interface definition, create an instance of the filter, set it up and start video from a camera:<\/p>\n

#<\/span>include <\/span><<\/span>dshow.h<\/span>><\/span>\r\n#<\/span>pragma <\/span>comment(lib, <\/span>\"strmiids.lib\"<\/span>)<\/span>\r\n\r\n#import <\/span>\"<\/span>libid:BDCE8B49-8895-4605-8278-E9A1FBC889AC<\/span>\"<\/span> no_namespace raw_interfaces_only raw_dispinterfaces named_guids <\/span>\/\/ IpVideoSource<\/span>\r\n\r\n\/\/ [...]<\/span>\r\n\r\ninline<\/span> VOID<\/span> ATLENSURE_INLINE_SUCCEEDED(<\/span>HRESULT nResult)<\/span>\r\n{<\/span>\r\n    ATLENSURE_SUCCEEDED(<\/span>nResult)<\/span>;<\/span>\r\n}<\/span>\r\n\r\n\/\/ [...]<\/span>\r\n\r\nCComPtr<<\/span>IBaseFilter><\/span> pBaseFilter;<\/span>\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pBaseFilter.<\/span>CoCreateInstance(<\/span>CLSID_JpegVideoSourceFilter)<\/span>)<\/span>;<\/span>\r\nCComQIPtr<<\/span>IJpegVideoSourceFilter><\/span> pJpegVideoSourceFilter =<\/span> pBaseFilter;<\/span>\r\nATLENSURE_THROW(<\/span>pJpegVideoSourceFilter,<\/span> E_NOINTERFACE)<\/span>;<\/span>\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pFilterGraph-<\/span>><\/span>AddFilter(<\/span>pBaseFilter,<\/span> L\"<\/span>Source<\/span>\"<\/span>)<\/span>)<\/span>;<\/span>\r\n\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pJpegVideoSourceFilter-<\/span>><\/span>put_Location(<\/span>CComBSTR(<\/span>_T(<\/span>\"<\/span>http:\/\/p.viewnetcam.com:60001\/nphMotionJpeg?Resolution=640x480&Quality=Standard<\/span>\"<\/span>)<\/span>)<\/span>)<\/span>)<\/span>;<\/span>\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pJpegVideoSourceFilter-<\/span>><\/span>put_Width(<\/span>640<\/span>)<\/span>)<\/span>;<\/span>\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pJpegVideoSourceFilter-<\/span>><\/span>put_Height(<\/span>480<\/span>)<\/span>)<\/span>;<\/span>\r\n\r\n#<\/span>pragma <\/span>region Render Output Pin<\/span>\r\nCComPtr<<\/span>IEnumPins><\/span> pEnumPins;<\/span>\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pBaseFilter-<\/span>><\/span>EnumPins(<\/span>&<\/span>pEnumPins)<\/span>)<\/span>;<\/span>\r\nCComPtr<<\/span>IPin><\/span> pPin;<\/span>\r\nATLENSURE_THROW(<\/span>pEnumPins-<\/span>><\/span>Next(<\/span>1<\/span>,<\/span> &<\/span>pPin,<\/span> NULL<\/span>)<\/span> =<\/span>=<\/span> S_OK,<\/span> E_FAIL)<\/span>;<\/span>\r\nATLASSERT(<\/span>pPin)<\/span>;<\/span>\r\nATLENSURE_INLINE_SUCCEEDED(<\/span>pFilterGraph-<\/span>><\/span>Render(<\/span>pPin)<\/span>)<\/span>;<\/span>\r\n#<\/span>pragma <\/span>endregion<\/span><\/pre>\n
This starts M-JPEG video from Panasonic BB-HCM381A camera available to public online at http:\/\/p.viewnetcam.com:60001\/nphMotionJpeg?Resolution=640×480&Quality=Standard<\/p>\n
UPDATE: ATLENSURE_SUCCEEDED macro in the snippet replaced with ATLENSURE_INLINE_SUCCEEDED – see additional post on this.<\/p>\n
C#.NET code snippet will look like this (using DirectShowLib<\/a>):<\/p>\n
using<\/span> DirectShowLib;<\/span>\r\nusing<\/span> AlaxInfoIpVideoSource;<\/span>\r\n\r\n\/\/ [...]<\/span>\r\n\r\nFilterGraph filterGraph =<\/span> new<\/span> FilterGraph(<\/span>)<\/span>;<\/span>\r\nIJpegVideoSourceFilter sourceFilter =<\/span> Activator.<\/span>CreateInstance(<\/span>Type.<\/span>GetTypeFromCLSID(<\/span>new<\/span> Guid(<\/span>\"<\/span>{A8DA2ECB-DEF6-414D-8CE2-E651640DBA4F}<\/span>\"<\/span>)<\/span>)<\/span>)<\/span> as<\/span> IJpegVideoSourceFilter;<\/span>\r\nIBaseFilter sourceBaseFilter =<\/span> sourceFilter as<\/span> IBaseFilter;<\/span>\r\n(<\/span>filterGraph as<\/span> IFilterGraph2)<\/span>.<\/span>AddFilter(<\/span>sourceBaseFilter,<\/span> \"<\/span>Source<\/span>\"<\/span>)<\/span>;<\/span>\r\nsourceFilter.<\/span>Location =<\/span> @\"<\/span>http:\/\/p.viewnetcam.com:60001\/nphMotionJpeg?Resolution=640x480&Quality=Standard<\/span>\"<\/span>;<\/span>\r\nsourceFilter.<\/span>Width =<\/span> 640<\/span>;<\/span>\r\nsourceFilter.<\/span>Height =<\/span> 480<\/span>;<\/span>\r\nIPin pin =<\/span> DsFindPin.<\/span>ByDirection(<\/span>sourceBaseFilter,<\/span> PinDirection.<\/span>Output,<\/span> 0<\/span>)<\/span>;<\/span>\r\n(<\/span>filterGraph as<\/span> IFilterGraph2)<\/span>.<\/span>Render(<\/span>pin)<\/span>;<\/span>\r\n(<\/span>filterGraph as<\/span> IMediaControl)<\/span>.<\/span>Run(<\/span>)<\/span>;<\/span>\r\nEventCode eventCode;<\/span>\r\n(<\/span>filterGraph as<\/span> IMediaEvent)<\/span>.<\/span>WaitForCompletion(<\/span>-<\/span>1<\/span>,<\/span> out<\/span> eventCode)<\/span>;<\/span><\/pre>\n","protected":false},"excerpt":{"rendered":"
Recent IP Video Source class\/module is not limited to use via registration as a video input\/capture\/source device. The filter is also registered as a regular filter and can be used programmatically in a regular way: CoCreateInstance, AddFilter etc. A C++ code snippet below shows how to import interface definition, create an instance of the filter,… <\/p>\n
Read the full article<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[38,82,75,158,351,137,486],"class_list":["post-1241","post","type-post","status-publish","format-standard","hentry","category-utilities","tag-c","tag-camera","tag-jpeg","tag-m-jpeg","tag-panasonic","tag-sample","tag-video"],"_links":{"self":[{"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/posts\/1241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/comments?post=1241"}],"version-history":[{"count":0,"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/posts\/1241\/revisions"}],"wp:attachment":[{"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/media?parent=1241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/categories?post=1241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alax.info\/blog\/wp-json\/wp\/v2\/tags?post=1241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}