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• Make thumbs from videos with ffmpeg [closed]

  20 février 2016, par Milan Milosevic

  Im try extract small thumbs from video every 15 sec.

  Here is what im try now

  ffmpeg -i movie.mp4 -r 1/15 -s 120x90 %03d.jpg

  But have some error from command line

  [mjpeg @ 0x9e695c0] bitrate tolerance too small for bitrate
  
  [mjpeg @ 0x9da9a60] ff_frame_thread_encoder_init failed
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  Whats wrong here, and how to get thumbs every 15 sec. and save it 0.jpg,1jpg,2jpg,3jpg,4jpg,5jpg...etc..

• How to extract single image (with different name each time) from multiple videos in the one folder using ffmpeg bash script

  15 juillet 2014, par morriscotty_sd

  Let’s start with this... I’m fairly new to Linux.

  I have been looking into ffmpeg to extract an image from a video using the terminal. I’ve accomplished this using this piece of code :

     ffmpeg  -itsoffset -4  -i oggvideo.ogg -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 oggThumb.jpg

  I run this when I’m in the directory which holds the videos in my project. But what I want is to extract an image from all videos in that folder at the same time, naming the image corresponding with the video name it’s extracted from. My end goal is to have a folder which will hold videos that a user uploads, and at a certain time the script will run and extract images from the uploaded videos, saving the image path to a database.

  I found this line of code :

  for %%i in (*.mp4) do ffmpeg -ss 20 -i %%i -t 1 -s 590x340 -f image2 %%i.jpg

  from this site : Trying-to-extract-1-image-from-multiple-videos-with-FFMPEG

  I run that in the terminal and it gives me the error : ’bash : syntax error near unexpected token `(’’
  I tried removing the ’( )’ but then it just takes me onto a new line. This is where I’m having the most problems due to being relatively new to linux commands.

  Any suggestions or advice would be very helpful.

• Android - Best solution to convert recorded H.264 Main Profile videos to H.264 Baseline Profile

  19 février 2016, par Alireza

  I found MediaPlayer cannot play videos which are encoded by H.264 Main Profile and I tried ExoPlayer and Vitamio but none of them solved my problem. finally I found the best solution is converting videos to H.264 Baseline Profile. FFmpeg is almost 9MB and it’s so heavy for my project, so I don’t like to use it for converting videos to that profile by commands. My friend suggested converting videos on the server-side but we both know it has bad performance. What should I do ? What is the best solution to this problem ?