Q. I wrote and compiled a c program, and in the Linux command line, it allows me to enter text, then press CTRL + D to enter the next step of the program, if thats what you wanna call it. Ive recompiled the source for windows, and i notice that CTRL + D just types ^D... what key combo should I be using?
A. If the program is looking for end-of-file, use ctrl-Z.
Using command line only, how to I retrieve the exact number of frames in a given video in Linux?
Q. Using command line only, how to I retrieve the exact number of frames in a given video in Linux?
ffmpeg will return the duration in minutes and the framerate but duration*framerate does not give an exact number of frames.
I need to know the exact number of frames.
ffmpeg will return the duration in minutes and the framerate but duration*framerate does not give an exact number of frames.
I need to know the exact number of frames.
A. mplayer -identify -fps 1 VIDEOFILE
Then look at
ID_VIDEO_FPS=1.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=80
ID_AUDIO_BITRATE=224000
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=41819.00
Notice how the length, in seconds, is now the exact number of frames. (41819 frames)
If you need it to be interactive-less:
mplayer -msglevel all=0 -identify -fps 1 -vo null -frames 0 VIDEOFILE | grep ID_LENGTH
Or, for a program:
mplayer -identify -fps 1 -vo null -frames 0 -msglevel all=-1 VIDEO > moviedata
then to get the frame info:
grep ID_LENGTH moviedata
should do.
Thanks for that, now I know how to do it too!
~Purr
Then look at
ID_VIDEO_FPS=1.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=80
ID_AUDIO_BITRATE=224000
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=41819.00
Notice how the length, in seconds, is now the exact number of frames. (41819 frames)
If you need it to be interactive-less:
mplayer -msglevel all=0 -identify -fps 1 -vo null -frames 0 VIDEOFILE | grep ID_LENGTH
Or, for a program:
mplayer -identify -fps 1 -vo null -frames 0 -msglevel all=-1 VIDEO > moviedata
then to get the frame info:
grep ID_LENGTH moviedata
should do.
Thanks for that, now I know how to do it too!
~Purr
I want to learn the Windows command line. Ware can i get info or a guide to do so?
Q. i have been using Linux since mid windows xp days. i know the Linux Terminal command line frontwards and backwards. however i only know a few simple commands for the Windows command line. for Ms_Dos and the newer Windows command shell. i want to download a guide of some kind so i can learn the windows command line inside and out. do you know ware i can find such a thing?
A. Check http://www.windows-commandline.com also. They have command line tips for all the useful tasks.
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