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• Moviepy : subclip fails when iterating through CSV

  5 mai 2016, par user3316291

  I am trying to randomize the order of video clips based on timing from a CSV file and then reassemble the randomized clips into a single video. However, I am receiving an error in the loop that iterates through each clip timing to create the subclip.

  Here is what my CSV looks like :

  00:00:32.18,00:00:52.10,1
  
  00:00:52.11,00:00:56.09,2
  
  00:00:56.10,00:00:58.15,3
  
  00:00:58.16,00:01:05.16,4
  
  00:01:05.17,00:01:16.04,5

  column 1 is clip onset
  column 2 is clip offset
  column 3 is scene number that I use to randomize

  Here is my code :

  import os
  
  import csv
  
  import numpy as np
  
  from moviepy.editor import *
  
  
  
  f = open('SceneCuts.csv')
  
  csv_f = csv.reader(f)
  
  
  
  scenes = []
  
  ons = []
  
  offs = []
  
  for row in csv_f:
  
      ons.append(row[0])
  
      offs.append(row[1])
  
      scenes.append(row[2])
  
  
  
  r_scene = scenes
  
  np.random.seed(1000)
  
  np.random.shuffle(r_scene)
  
  r_scene = map(int, r_scene)
  
  
  
  clip = VideoFileClip("FullVideo.m4v")
  
  
  
  temp = []
  
  for row in r_scene:
  
      print(row)
  
      temp.append(clip.subclip(ons[row-1], offs[row-1]))
  
  
  
  catclip = concatenate_videoclips(temp)
  
  catclip_resize = catclip.resize((1024,576))
  
  catclip_resize.write_videofile("RandomVideo.mp4")

  Here is the output, error occurs at line 29 (temp.append)

  File "/Users/Dustin/anaconda/lib/python2.7/site-packages/moviepy/video/io/ffmpeg_reader.py", line 87, in initialize
  
  self.proc = sp.Popen(cmd, **popen_params)
  
  
  
  File "/Users/Dustin/anaconda/lib/python2.7/subprocess.py", line 710, in __init__
  
  errread, errwrite)
  
  
  
  File "/Users/Dustin/anaconda/lib/python2.7/subprocess.py", line 1316, in _execute_child
  
  data = _eintr_retry_call(os.read, errpipe_read, 1048576)
  
  
  
  File "/Users/Dustin/anaconda/lib/python2.7/subprocess.py", line 476, in _eintr_retry_call
  
  return func(*args)
  
  
  
  OSError: [Errno 22] Invalid argument

  Based on my research, it appears to be something regarding child processes and subprocess.Popen, but I can’t figure it out. Thanks !

  EDIT to add new information :
  I have been running the above script in Spyder (anaconda) and receiving the above errors. However, when I run from a terminal or sublime (cmd+b), the code "works". It runs and I do not get the above error, however, the resulting video file is a mess. There are multiple conflicting audio tracks that shouldn’t be there. I am not sure what is going on in Spyder, but I’d love to know. Also, I still need to fix the audio problem.

• How to use ffmpeg to overlay waveforms on xstack mosaics and specify specific audio for playback

  1er mai 2022, par kellib

  I would like to make a mosaic of multiple titled streams, 1) specifying which of the audio streams to play and 2) overlay waveforms at the bottom of each of the video tiles for the audio that they belong to.

  


  I'm successfully able to create the titled mosaic of streams with the code below.

  


  However :

  


  

  1. I'm having a hard time figuring out how to specify just one of the specific audio sources. I found amix, but I don't really want to mix them, I just want to specify audio [a0], or [a1], or [a2], etc.

  


  


  and

  


  

  2. I'm having a hard time figuring out how to overlay the wave forms at the bottom of the video for each of the tiles. I struggled trying to figure out putting showwaves into the mix. Is it possible ?

  


  


  I want each tile to look like this, but since these are rtmp streams, they need to play-out the matching waveforms dynamically with each stream. https://dragonquest64.blogspot.com/2020/01/ffmpeg-audio-waveform.html

  


  If someone could point me in the right direction, that would be great. I'm getting close, but I'm pretty new to all of this, and have already spent way more time than I should have, so would love a little help.

  


  ffmpeg \
-i rtmp://my.cdn.com/srcEncoders/STREAM-1 \
-i rtmp://my.cdn.com/srcEncoders/STREAM-2 \
-i rtmp://my.cdn.com/srcEncoders/STREAM-3 \
-i rtmp://my.cdn.com/srcEncoders/STREAM-4 \
  -filter_complex " \
      [0:v] setpts=PTS-STARTPTS, scale=qvga \
    , drawtext=text=STREAM-1:fontsize=20:x=10:y=10:fontcolor=white:box=1:boxcolor=black@0.5:boxborderw=5 [a0]; \
      [1:v] setpts=PTS-STARTPTS, scale=qvga \
    , drawtext=text=STREAM-2:fontsize=20:x=10:y=10:fontcolor=white:box=1:boxcolor=black@0.5:boxborderw=5 [a1]; \
      [2:v] setpts=PTS-STARTPTS, scale=qvga \
    , drawtext=text=STREAM-3:fontsize=20:x=10:y=10:fontcolor=white:box=1:boxcolor=black@0.5:boxborderw=5 [a2]; \
      [3:v] setpts=PTS-STARTPTS, scale=qvga \ 
    , drawtext=text=STREAM-4:fontsize=20:x=10:y=10:fontcolor=white:box=1:boxcolor=black@0.5:boxborderw=5 [a3]; \
      [a0][a1][a2][a3]xstack=inputs=4:layout=0_0|0_h0|w0_0|w0_h0[out]; \
    amix=inputs=1
      " \
  -map "[out]" \
 -c:v libx264 -b:v 1000k -g 30 -keyint_min 120 -profile:v baseline -preset veryfast -f mpegts "udp://127.0.0.1:1234?pkt_size=1316"


  


• FFmpeg - cannot find ExecuteBinaryResponseHandler - Android/Java

  20 juillet 2018, par pudility

  I am trying to make a module for react-native that will change a video into a gif. I have little to no experience with android studios/java, but I would love to learn more ! I am using this library to convert the video to a gif. Here is my code :

  package com.reactlibrary;
  
  
  
  import android.widget.Toast;
  
  import com.facebook.react.bridge.ReactApplicationContext;
  
  import com.facebook.react.bridge.ReactContextBaseJavaModule;
  
  import com.facebook.react.bridge.ReactMethod;
  
  import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
  
  
  
  public class RNGifMakerModule extends ReactContextBaseJavaModule {
  
  
  
    private final ReactApplicationContext reactContext;
  
  
  
    public RNGifMakerModule(ReactApplicationContext reactContext) {
  
      super(reactContext);
  
      this.reactContext = reactContext;
  
    }
  
  
  
    @Override
  
    public String getName() {
  
      return "RNGifMakerModule";
  
    }
  
  
  
    @ReactMethod
  
    public void alert(String message) {
  
        Toast.makeText(getReactApplicationContext(), "Error", Toast.LENGTH_LONG).show();
  
        String[] cmd = {"-i"
  
                , message
  
                , "Image.gif"};
  
        conversion(cmd);
  
    }
  
  
  
    public void conversion(String[] cmd) {
  
  
  
      FFmpeg ffmpeg = FFmpeg.getInstance(this.reactContext);
  
  
  
      try {
  
  
  
  
  
        // to execute "ffmpeg -version" command you just need to pass "-version"
  
        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {
  
  
  
          @Override
  
          public void onStart() {
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
          }
  
  
  
          @Override
  
          public void onSuccess(String message) {
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
          }
  
        });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
        // Handle if FFmpeg is already running
  
        e.printStackTrace();
  
      }
  
    }
  
  }

  And I get this error :

  Error:(43, 31) error: cannot find symbol class ExecuteBinaryResponseHandler

  This seems odd to be, because in the documentation for ffmpeg-android-java it says to use almost exactly the same code.

  Bounty

  The bounty will be awarded to you if you can find a way to convert a video.mp4 into a gif. You do not necessarily have to use FFmpeg, but your solution has to work with java/android studios.