Video orientation change

bojan74 bojan.flander at gmail.com
Thu Jul 23 12:22:35 UTC 2020


Since it looks like raw text is not visible I am adding again errors:

0:00:21.546105300 20592 0000000003A74B00 INFO               GST_EVENT
gstevent.c:847:gst_event_new_caps: creating caps event video/x-raw,
format=(string)I420, width=(int)1280, height=(int)720,
interlace-mode=(string)progressive, pixel-aspect-ratio=(fraction)1/1,
chroma-site=(string)mpeg2, colorimetry=(string)bt709,
framerate=(fraction)25/1
0:00:21.559990500 20592 0000000003A74B00 INFO               GST_EVENT
gstevent.c:847:gst_event_new_caps: creating caps event video/x-vp8,
profile=(string)0, streamheader=(buffer)<
4f56503830010100050002d00000010000010000001900000001,
4f56503830022024000000456e636f6465642077697468204753747265616d657220767038656e6320312e31372e320000000001
>, width=(int)1280, height=(int)720, pixel-aspect-ratio=(fraction)1/1,
framerate=(fraction)25/1, interlace-mode=(string)progressive,
colorimetry=(string)bt709, chroma-site=(string)mpeg2
0:00:21.560080700 20592 0000000003A74B00 WARN             matroskamux
matroska-mux.c:975:gst_matroska_mux_video_pad_setcaps:<webmmux0> error: Caps
changes are not supported by Matroska
0:00:21.560126900 20592 0000000003A74B00 INFO        GST_ERROR_SYSTEM
gstelement.c:2224:gst_element_message_full_with_details:<webmmux0> posting
message: Could not multiplex stream.
0:00:21.560171000 20592 0000000003A74B00 INFO        GST_ERROR_SYSTEM
gstelement.c:2251:gst_element_message_full_with_details:<webmmux0> posted
error message: Could not multiplex stream.



Now I found some solution to create bigger caps from start 1280x1280 so
final video is all time in the same format and first portrait video (on left
side of the bigger canvas) is then correctly transform to landscape view (on
top side of the bigger canvas).

Anyway does anyone know better solution if caps change (from portrait to
landscape) to solve this problem in final webm video?




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