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quick_command_list [2017/07/26 17:59] k2patel |
quick_command_list [2018/10/06 06:21] k2patel [FFMpeg Conversion of 4K] |
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+ | ==== Remove file with ASCII Name ==== | ||
+ | |||
+ | Simplest thing to do is use built in functionality to search and remove in command. | ||
+ | Here is the file i've on my machine. | ||
+ | <code bash> | ||
+ | �^? | ||
+ | </code> | ||
+ | |||
+ | which translate to //''$'\250\177'// <br> | ||
+ | So check or list all the files with ascii in it. | ||
+ | <code bash> | ||
+ | ls [^[:ascii:]]* | ||
+ | </code> | ||
+ | |||
+ | now to remove | ||
+ | <code bash> | ||
+ | rm [^[:ascii:]]* | ||
+ | </code> | ||
+ | |||
+ | :!: Regex can be modified to list all matching file before removal. | ||
+ | |||
+ | ==== Testing connection or port without any software ==== | ||
+ | In linux proper way to test tcp or udp port connection without any software installed should be creating dev node. | ||
+ | |||
+ | <code bash> | ||
+ | /dev/<proto>/<host>/<port> | ||
+ | </code> | ||
+ | |||
+ | out put can be redirected to tty with help of cat. | ||
+ | <code bash> | ||
+ | cat < /dev/tcp/k2patel.in/3306 | ||
+ | </code> | ||
+ | |||
+ | ==== FFMpeg Conversion of 4K ==== | ||
+ | I had issue of no audio while playing file over DLNA.\\ | ||
+ | I've did the transcoding so it can play audio on my Phillips 4K TV. | ||
+ | |||
+ | <code bash> | ||
+ | ffmpeg -i <input_file>.mp4 \ | ||
+ | -map 0:0 -map 0:1 -map 0:2 -map 0:3 -map 0:5 -map 0:12 \ | ||
+ | -c:v copy \ | ||
+ | -c:a:0 truehd -strict -2 \ | ||
+ | -c:a:1 ac3 \ | ||
+ | -c:s copy \ | ||
+ | <output_file>.mkv | ||
+ | </code> | ||
+ | OR | ||
+ | <code bash> | ||
+ | ffmpeg -i old_file.mp4 \ | ||
+ | -map 0:0 -map 0:1 -map 0:3 -map 0:5 \ | ||
+ | -c:v copy \ | ||
+ | -c:a:0 ac3 \ | ||
+ | -c:s copy \ | ||
+ | new_file.mp4 | ||
+ | </code> | ||
+ | |||
+ | - First thing list all mapping on your existing file using 'ffmpeg -i <file> | ||
+ | - Select all streams using map you would like to copy to your new file. | ||
+ | - each map should be listed using map so i selected only 6 out of 12. | ||
+ | - After that specify wich codecs to use. | ||
+ | - in -c:v i'm copying video as is. | ||
+ | - in -c:a:0 i'm converting audio to truehd | ||
+ | - in -c:a:1 i'm also adding second audio stream which is ac3. | ||
+ | - in -c:s i'm copying subtitles. |