Recherche avancée

Sur d’autres sites (8523)

• how to run ffmpeg command(windows) in java

  26 mai 2020, par SAI GIRI CHARY AOUSULA

  I executed the below FFMPEG terminal command in command prompt successfully. But I am unable to execute this command in my java program. I can execute all other ffmpeg commands which doesn't have double quotation marks, in my java program. Here I have confusing only with double quotation marks("...").

  



  ffmpeg -i "concat:C:\\journalism\\videos\\vid1.ts|C:\\journalism\\videos\\vid2.ts" -c copy C:\\journalism\\videos\\output.mp4


  



  I can execute above in command prompt successfully. But I tried as below in my java code.

  



  Runtime.getRuntime().exec("C:\\ffmpeg\\bin\\ffmpeg -i 'concat:C:\\journalism\\videos\\vid1.ts|C:\\journalism\\videos\\vid2.ts' -c copy C:\\journalism\\videos\\output.mp4");


  



  Even I tried by replaced the double quotation marks("...") with single quotation marks('...'). But not succeeded.

  



  Can anyone please help me to get out of this issue...

  



  Thanks in advance...

  


• Automated Concatenate with FFMPEG Using Re-Encode

  18 juin 2021, par Sam OT

  I would like to concaternate a fairly large list of videos using FFMPEG.
The following answer from another question is highly relevant :
https://stackoverflow.com/a/11175851/5065462.
I explain below why it isn't sufficient for me.
I'm using MP4 files.

  


  I am using Windows 10. I'd like to write a bat file with arguments. I'll then call this from either Command Prompt or PowerShell.

  


  ---

  


  


  I want to automate Option 1 https://stackoverflow.com/a/11175851/5065462 to take as input a txt (or similar) file containing the filepaths for the videos to be concatenated.
I'm happy with all the default [#:v] [#:a] options.

  


  


  


  An alternative option is just to write a small program, either in Command Prompt or python3 is fine, which outputs a text string that I just copy+paste into cmd/PS.
Unfortunately, I'm not sure how to use python to get filenames.

  


  


  ---

  


  Option 2 in https://stackoverflow.com/a/11175851/5065462 looks great. Unfortunatley, the stream-encoding has issues with my mp4 files. I found they are fixed by using Option 1 in the linked answer. However, I don't want to type every filename each time.

  


• Restore the previous system path variable (windows)

  17 septembre 2022, par NaRas

  a question regarding messing with Windows Path variable.
My situation is quite specific :

  


  

  • I was trying to install ffmpeg according to this tutorial https://www.geeksforgeeks.org/how-to-install-ffmpeg-on-windows/

  


  • The last step was setting the path variable setx /m PATH "C:\ffmpeg\bin;%PATH%"

  


  • It worked, however afterwards I noticed that if I try to call python from the command prompt or the powershell if run as administrator, I started getting 'chcp' is not recognized as an internal or external command, (although works fine if run as user), indicating that something is wrong with PATH variables.

  


  • I looked into my variables and saw this edit.

  


  


  Path

  


  It seems to me that the command added the ffmpeg line to the system path and possibly overwritten the original, which is why there are issues when using command prompt as administrator. It probably should have added it to the user Path (not system Path variable)

  


  If that is the case, is there a way to restore the previous system Path variable. Maybe I can paste it from the user Path variable ?