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quick_command_list [2018/05/22 13:59]
k2patel [Ping packet size]
quick_command_list [2018/10/06 02:21] (current)
k2patel [FFMpeg Conversion of 4K]
Line 457: Line 457:
  
 :!: Regex can be modified to list all matching file before removal. :!: 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.
quick_command_list.1527011974.txt.gz ยท Last modified: 2018/05/22 13:59 by k2patel