blind-to-video.1 (1791B)
1 .TH BLIND-TO-VIDEO 1 blind 2 .SH NAME 3 blind-to-video - Converts blind video to a regular video 4 .SH SYNOPSIS 5 .B blind-to-video 6 [-d] 7 .I frame-rate 8 .IR ffmpeg-arguments " ..." 9 .SH DESCRIPTION 10 .B blind-to-video 11 reads a 12 .B blind 13 video from stdin and uses 14 .BR ffmpeg (1) 15 to convert it to a normal video format. 16 .I frame-rate 17 must be set to the frame-rate of the input video, 18 lest the tempo in the output video be modified. You 19 can use 20 .BR ffprobe (1) 21 (an 22 .B ffmpeg 23 utility) on your original video to find out the frame rate: 24 25 .nf 26 ffprobe -v quiet -show_streams -select_streams v -- your-video.mkv | 27 grep '^r_frame_rate=' | cut -d = -f 2- 28 .fi 29 30 This value will be a rational value, which is supported. 31 All argumnets after 32 .I frame-rate 33 (that is 34 .IR ffmpeg-arguments " ...)" 35 are arguments that will be passed to 36 .BR ffmpeg (1) 37 after the arguments that 38 .B blind-to-video 39 will create that specifies the input file and necessary metadata 40 such as frame rate, geometry, and format, of the input video. 41 Beginners are recommended to use 42 .B -c:v libx264 -preset veryslow -crf 0 -pix_fmt yuv444p -- 43 .IR output-file . 44 .P 45 If your output video need include an alpha channel, the codec 46 .BR ffvhuff . 47 Not all video players support videos with transparency. 48 .BR mpv (1) 49 is a good media player for previewing videos with transparency, 50 however it distorts colour somewhat. 51 .SH OPTIONS 52 .TP 53 .B -d 54 Perform coarse colour-model conversion. This will increase the 55 performance of the conversion, however, it the colours will 56 not look correct, unless the -d flag was also with 57 .BR blind-from-video (1) 58 and not colours have been modified between to the processes. 59 .SH SEE ALSO 60 .BR blind (7), 61 .BR blind-from-video (1), 62 .BR blind-compress (1), 63 .BR ffmpeg (1), 64 .BR ffprobe (1) 65 .SH AUTHORS 66 Mattias Andrée 67 .RI < maandree@kth.se >