hey Carl,
I generated the test file and no subs are rendered from the subs2.mov file. I see the test pattern/colorbars/clock. Instead of using a transparent PNG, could I instead generate an alpha channel 1920x1080 canvas directly from ffmpeg? I wonder if my PNG file is causing the issue? Gandharv p.s. When I say I see nothing, I mean its a black image with no text. ________________________________ From: ffmpeg-user <ffmpeg-user-boun...@ffmpeg.org> on behalf of Carl Eugen Hoyos <ceffm...@gmail.com> Sent: Monday, February 5, 2018 7:26:37 AM To: FFmpeg user questions Subject: Re: [FFmpeg-user] Alpha Channel QT with SubTitles 2018-01-17 17:34 GMT+01:00 Gandharv Bhagat <fra...@hotmail.com>: > Thanks for the frame rate multiplier correction, will make the change. > > As for the file, I am checking in FCP 7. When alpha type is set to > ‘none/ignore’ I see a white background and white text and the drop > shadow. When the alpha type is set to ‘straight’, ‘black’, or ‘white’ > I don’t see anything. I wonder how it is possible not to "see anything" on a video screen... The most relevant question from our point-of-view is if the following command (or a variant) indicates transparency in your video: $ ffmpeg -f lavfi -i testsrc=s=hd1080 -i Subs2.mov -filter_complex overlay -qscale 2 -vcodec mpeg4 out.mov The issue hitting you may be that a flag has to be set in the mov file or the video bitstream to indicate the type of the transparency. Please do not top-post here, Carl Eugen _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fffmpeg.org%2Fmailman%2Flistinfo%2Fffmpeg-user&data=02%7C01%7C%7C4b8be448d4d84c27456108d56c949044%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636534307684783710&sdata=7XNGuBzb1jLhbuDHlEWcU3I5OpOs69Ginn55nCyJ5cc%3D&reserved=0 To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
