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• moviepy write_videofile giving error on remote host

  30 juillet 2021, par HadiH2o

  I'm trying to put a logo on a video using the moviepy module
This module works properly on my PC(windows) but gives an error when I run the following code on the remote host I bought(linux).

  


  code :

  


  import random
import moviepy.editor as mp
import requests


def video_watermark(url):
    corners = [("right", "top"), ("left", "top"), ("right", "bottom"), ("left", "bottom")]
    response = requests.get(url)
    with open("media/videos/raw_video.mp4", "wb") as file:
        file.write(response.content)

    video = mp.VideoFileClip("./media/videos/raw_video.mp4")

    logo = (mp.ImageClip("./media/bold_logo.png")
            .set_duration(video.duration)
            .resize(height=50)  # if you need to resize...
            .margin(right=8, top=8, opacity=0)  # (optional) logo-border padding
            .set_pos(random.choice(corners)))

    final = mp.CompositeVideoClip([video, logo])
    final.write_videofile("./media/videos/ready_video.mp4")

video_watermark("url")


  


  error :

  


  OSError: [Errno 32] Broken pipe
 
MoviePy error: FFMPEG encountered the following error while writing
file ./media/videos/ready_video.mp4:
 
b'Error initializing output stream 0:0 -- Error while opening encoder
for output stream #0:0 - maybe incorrect parameters such as bit_rate,
rate, width or height\n'


  


  please help me to fix this problem

  


• configure : arm : Don't add -march= to the compiler if no preference was passed

  20 septembre 2021, par Martin Storsjö

  configure : arm : Don't add -march= to the compiler if no preference was passed
  If no —cpu= option was passed to configure, we detect what the
  
  compiler defaults to. This detected value was then fed back to the
  
  rest of the configure logic, as if it was an explicit choice.
  This breaks on Ubuntu 21.10 with GCC 11.1.
  Since GCC 8, it's possible to add configure extra features via the
  
   march option, like e.g. -march=armv7-a+neon. If the -mfpu= option
  
  is configured to default to 'auto', the fpu setting gets taken
  
  from the -march option.
  GCC 11.1 in Ubuntu seems to be configured to use -mfpu=auto. This
  
  has the effect of breaking any compilation command that specifies
  
   march=armv7-a, because the driver implicitly also adds -mfloat-abi=hard,
  
  and that combination results in this error :
      cc1 : error : ‘-mfloat-abi=hard’ : selected processor lacks an FPU
  One can compile successfully by passing e.g. -march=armv7-a+fp.
  Therefore, restructure configure. If no specific preference was set
  
  (and the 'cpu' configure variable was set as the output of
  
  probe_arm_arch), the value we tried to set via -march= was the same
  
  value that we just tried to detect as the compiler default.
  So instead, just try to detect what the compiler defaults to, with
  
  to allow setting other configure settings (such as 'fast_unaligned'),
  
  but don't try to spell out the compiler's default via the -march flag.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] configure

• FFMpeg - Is it difficultt to use

  13 juillet 2015, par user1861447

  I am trying to use ffmpeg, and have been doing a lot of experiment last 1 month.
  I have not been able to get through. Is it really difficult to use FFmpeg ?

  My requirement is simple as below.
  Can you please guide me if ffmpeg is suitable one or I have implement on my own (using codec libs available).

  1. I have a webm file (having VP8 and OPUS frames)
  2. I will read the encoded data and send it to remote guy
  3. The remote guy will read the encoded data from socket
  4. The remote guy will write it to a file (can we avoid decoding).
  5. Then remote guy should be able to pay the file using ffplay or any player.

  Now I will take a specific example.

  1. Say I have a file small.webm, containing VP8 and OPUS frames.

  2. I am reading only audio frames (OPUS) using av_read_frame api (Then checks stream index and filters audio frames only)

  3. So now I have data buffer (encoded) as packet.data and encoded data buffer size as packet.size (Please correct me if wrong)

  4. Here is my first doubt, everytime audio packet size is not same, why the difference. Sometimes packet size is as low as 54 bytes and sometimes it is 420 bytes. For OPUS will frame size vary from time to time ?

  5. Next say somehow extract a single frame (really do not know how to extract a single frame) from packet and send it to remote guy.

  6. Now remote guy need to write the buffer to a file. To write the file we can use av_interleaved_write_frame or av_write_frame api. Both of them takes AVPacket as argument. Now I can have a AVPacket, set its data and size member. Then I can call av_write_frame api. But that does not work. Reason may be one should set other members in packet like ts, dts, pts etc. But I do not have such informations to set.

  Can somebody help me to learn if FFmpeg is the right choice, or should I write a custom logic like parse a opus file and get frame by frame.