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• ffmpeg : save separate frames as still gifs

  7 novembre 2013, par Eugene M

  The question is simple : I don't want ffmpeg to create an animated GIF from given video stream, I want separate frames, each in GIF format. But when I set output file to something like frame%09d.gif ffmpeg tends to create an animation (and stores it exactly as frame%09d.gif). The same for -f gif option.

  Of course, I could save PNGs and use ImageMagic's convert utility to transform them to GIFs, but I don't want any additional invocation overhead because I'm dealing with live streams and going to crunch large amounts of data.

  Here is what I do, nothing special :

  ffmpeg -i http://brightcove03-f.akamaihd.net/valgbodmandag1378107345_1_300k@80362 -f gif -y frame_%09d.gif
  
  
  
  ffmpeg version N-54643-g15cee5e Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jul 11 2013 03:35:11 with gcc 4.7.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu
  
  tls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --ena
  
  ble-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger -
  
  -enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-lib
  
  vpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 39.100 / 52. 39.100
  
    libavcodec     55. 18.102 / 55. 18.102
  
    libavformat    55. 12.101 / 55. 12.101
  
    libavdevice    55.  3.100 / 55.  3.100
  
    libavfilter     3. 80.100 /  3. 80.100
  
    libswscale      2.  3.100 /  2.  3.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [flv @ 00000000002cb700] Stream discovered after head already parsed
  
  Input #0, flv, from 'http://brightcove03-f.akamaihd.net/valgbodmandag1378107345_1_300k@80362':
  
    Metadata:
  
      encoder         : Lavf54.6.100
  
    Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 480x270 [SAR 1:1 DAR 16:9], 25 tbr, 1k tbn, 50 tbc
  
      Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s
  
      Stream #0:2: Data: none
  
  [swscaler @ 0000000004d051e0] No accelerated colorspace conversion found from yuv420p to bgr8.
  
  Output #0, gif, to 'frame_%09d.gif':
  
    Metadata:
  
      encoder         : Lavf55.12.101
  
      Stream #0:0: Video: gif, bgr8, 480x270 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 100 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> gif)
  
  Press [q] to stop, [?] for help
  
  frame=  141 fps=130 q=-1.0 Lsize=    4960kB time=00:00:05.68 bitrate=7153.1kbits/s
  
  video:5100kB audio:0kB subtitle:0 global headers:0kB muxing overhead -2.743247%

  After all I get a file named "frame_%03d.gif", but instead I want to have several files "frame_001.gif", "frame_002.gif", etc.

  Any ideas ?
  Thanks in advance.

• where to save mpd file in raspberry pi so dash.js can access it remotely ?

  11 mai 2016, par Djm

  This is very high level question. I want to stream a live video from raspberry pi. I want to be able to watch live video in the browser remotely being streamed by the Raspberry pi.I want to use DASH stream protocol, and Dash.js as client to HTML5. I have looked through different tutorials but i am still puzzled about how this works.I understand that (assuming you have already prepared your videos with FFMPEG tool) from the client Dash.js
  you have to make a call/request and pass a url to your mpd file. My question is where would you save the file in raspberry pi especially if the Dash client is in a different web app(i want to make the call remotely) ?

• MoviePy does not save anything anywhere. But also no error

  27 mai 2023, par Paul Spieker

  I tried running simple moviepy code. It does not save anything. Exit code 0. No error message. No sucessfully saved print. I have the newest version of moviepy and ffmpeg. Doesnt work with or without specifying an output directory. I am on windows 10, working in PyCharm with Python 3.9 . I am super new to coding if it isnt obvious, thankful for any help !! Here is the code I used :

  


  from moviepy.editor import VideoClip
from moviepy.video.io.ffmpeg_writer import FFMPEG_VideoWriter




    w, h = 640, 480
    red = int(255 * t)
    green = int(255 * (1 - t))
    blue = 0
    frame = np.zeros((h, w, 3), dtype=np.uint8)
    frame[:, :, 0] = red
    frame[:, :, 1] = green
    frame[:, :, 2] = blue
    return frame


duration = 5  # in seconds
fps = 30
width, height = 640, 480
video_clip = VideoClip(make_frame, duration=duration)


output_path = "output.mp4"


video_clip.write_videofile(output_path, fps=fps, codec='libx264')

print("File saved successfully!")


  


  I was expecting to get any file saved at all. Nothing shows up in my folder. I have double checked MoviePy and ffmpeg as stated.