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• looking for the right regex expression to pick some specific sentences from a file using java regex

  26 novembre 2014, par sachh_ke_nasdiik

  I am writing a program in java that records the screen.
  it is actually something that uses the ffmpeg tool
  with a simple GUI.
  what I actually need is a way to grab from the following file :

  1. ffmpeg version N-57367-g2f31b73 Copyright (c) 2000-2013 the FFmpeg developers

  2. built on Oct 23 2013 20:22:19 with gcc 4.8.2 (GCC)

  3. configuration : —enable-gpl —enable-version3 —disable-w32threads —enable-avisynth
     — enable->bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-
     libass —enable-libbluray —enable-libcaca —enable-libfreetype —enable-libgsm —enable-libilbc —enable-
     libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-
     libopenjpeg —enable-libopus —enable-librtmp —enable-libschroedinger —enable-libsoxr —enable-
     libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-aacenc —enable-
     libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libx264 —enable-
     libxavs —enable-libxvid —enable-zlib

  4. libavutil 52. 47.101 / 52. 47.101
  5. libavcodec 55. 38.101 / 55. 38.101
  6. libavformat 55. 19.104 / 55. 19.104
  7. libavdevice 55. 4.100 / 55. 4.100
  8. libavfilter 3. 89.100 / 3. 89.100
  9. libswscale 2. 5.101 / 2. 5.101
  10. libswresample 0. 17.104 / 0. 17.104
  11. libpostproc 52. 3.100 / 52. 3.100
  12. [dshow @ 02482700] DirectShow video devices
  13. [dshow @ 02482700] "screen-capture-recorder"
  14. [dshow @ 02482700] DirectShow audio devices
  15. [dshow @ 02482700] "Microphone (ASUS Xonar DGX Audio Device)"
  16. [dshow @ 02482700] "virtual-audio-capturer"
  17. [dshow @ 02482700] "Line In (ASUS Xonar DGX Audio Device)"
  18. [dshow @ 02482700] "Stereo Mix (ASUS Xonar DGX Audio Device)"
  19. [dshow @ 02482700] "Aux (ASUS Xonar DGX Audio Device)"
  20. [dshow @ 02482700] "Wave (ASUS Xonar DGX Audio Device)"
  21. dummy : Immediate exit requested

  only the sentences between the quotation marks,
  those that describes the different devices,
  that shows up at the end of the file,
  ignoring of course the line numbering, that does not appear in the
  output file, but inserted here for better fluency.
  does anyone have any ideas how to work it out using java regex ?
  assuming I am using an enhanced for loop over a string array
  checking each line for its contents.

• Rename tpel_template.c ---> pel_template.c

  12 juin 2014, par Diego Biurrun

  Rename tpel_template.c ---> pel_template.c
  The new name more accurately describes what the file is about.
  

  • [DH] libavcodec/h264qpel_template.c
  • [DH] libavcodec/hpeldsp.c
  • [DH] libavcodec/pel_template.c
  • [DH] libavcodec/qpeldsp.c
  • [DH] libavcodec/tpeldsp.c

• How do I properly save an animation involving circles with matplotlib.animation and ffmpeg ?

  12 juillet 2020, par bghost

  I recently tried out matplotlib.animation, and it's a wonderful tool. I can now make and save basic animations (ie that only involve straight lines) without any issues. However, when I made an animation involving circles, even though the interactive display was perfect, the saved mp4 file wasn't really satisfying. In the mp4 file, the edges of the circles were blurred, and if the circles were made semi-transparent (ie with an alpha value < 1), they all suddenly became completely opaque after a couple of frames. I suspected it was due to the fact that my bitrate wasn't high enough, but I went up to 10000 kb/s (instead of 1800), and exactly the same phenomenon occurred.

  &#xA;

  What can be done to solve these 2 issues (blurred edges + negated transparency) in the generated mp4 file ?

  &#xA;

  Here is a simple animation that describes what I just said :

  &#xA;

  import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation

fig = plt.figure(figsize=(11, 7))
ax = plt.axes(xlim=(-1.2, 1.2), ylim=(-0.7, 0.7))
ax.set_aspect('equal')

dict_circles = {}
dict_circles['ring'] = plt.Circle((-0.5, 0), 0.5, color='b', lw=2, fill=False)
dict_circles['disk'] = plt.Circle((-0.5, 0), 0.5, color='b', alpha=0.2)

def init():
    for circle in dict_circles.values():
        ax.add_patch(circle)
    return(dict_circles.values())

nb_frames = 100
X_center = np.linspace(-0.5, 0.5, nb_frames)

def animate(frame):
    for circle in dict_circles.values():
        circle.center = (X_center[frame], 0)
        ax.add_patch(circle)
    return(dict_circles.values())

ani = animation.FuncAnimation(fig, animate, init_func=init, frames=nb_frames, blit=True, interval=10, repeat=False)
plt.show()

plt.rcParams['animation.ffmpeg_path'] = 'C:\\ffmpeg\\bin\\ffmpeg.exe'
Writer = animation.writers['ffmpeg']
writer_ref = Writer(fps=15, bitrate=1800)

ani.save('Blue circle.mp4', writer=writer_ref)


  &#xA;