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cv::VideoWriter

cv::VideoWriter/メモ

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OpenCV 4.1

• 拡張子	FOURCC		バックエンド	コンテナ
  avi	MJPG	OK	FFmpeg	AVI 1.0/MJPEG
  avi	DIB	NG			Could not open the output video file for write
  avi	X264	NG	-	-	Failed to load OpenH264 library: openh264-1.8.0-win64.dll Please check environment and/or download library: https://github.com/cisco/openh264/releases Could not open the output video file for write
  avi	H264	NG	-	-	Failed to load OpenH264 library: openh264-1.8.0-win64.dll Please check environment and/or download library: https://github.com/cisco/openh264/releases Could not open the output video file for write
  avi	MP42	OK	FFmpeg	AVI 1.0/MPEG4-V2?
  mp4	MP42	OK	MSMF	MPEG4?/H.264	OpenCV: FFMPEG: tag 0x3234504d/'MP42' is not supported with codec id 15 and format 'mp4 / MP4 (MPEG-4 Part 14)
  mp4	X264	OK	MSMF	MPEG4?/H.264	OpenCV: FFMPEG: tag 0x34363258/'X264' is not supported with codec id 27 and format 'mp4 / MP4 (MPEG-4 Part 14) OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1' Failed to load OpenH264 library: openh264-1.8.0-win64.dll Please check environment and/or download library: https://github.com/cisco/openh264/releases
  mp4	H264	OK	MSMF	MPEG4?/H.264	OpenCV: FFMPEG: tag 0x34363258/'X264' is not supported with codec id 27 and format 'mp4 / MP4 (MPEG-4 Part 14) OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1' Failed to load OpenH264 library: openh264-1.8.0-win64.dll Please check environment and/or download library: https://github.com/cisco/openh264/releases

OpenCV 3.3

• 拡張子	FOURCC	コーデック	apiReference	結果	バックエンド	コンテナ
  avi	MJPG		-	OK	cv::mjpeg?	AVI 2.0?/MJPEG
  avi	DIB		-	OK	VFW	AVI 1.0/無圧縮
  avi	ULRA	UtVideo? RGBA	-	OK	FFmpeg	AVI 1.0/24bit YUV420
  avi	ULRA	UtVideo? RGBA	CV_CAP_VFW	NG	-	-
  avi	ULRG	UtVideo? RGB	-	OK	FFmpeg	AVI 1.0/24bit YUV420
  avi	ULRG	UtVideo? RGB	CV_CAP_VFW	OK	VFW	AVI 1.0/24bit RGB
  avi	UMRA			NG	-	-

関連

• CV_FOURCC
• FOURCC