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• FFMPEG : using filters for adding transparent watermark

  13 mai 2022, par Sar sinua

  how can i combine these two lines of code for adding transparent watermark (with Dynamic size)

  


  ffmpeg -i 1.gif -i logo.png -filter_complex "[1]format=rgba,colorchannelmixer=aa=0.5[logo];[0][logo]overlay=(W-w)/2:H-h-5" -c:a copy output.gif

ffmpeg -i 1.gif -i logo.png -filter_complex "[1][0]scale2ref=w=oh*mdar:h=ih*0.1[logo][video];[video][logo]overlay=(W-w)/2:H-h-5" -c:a copy output.gif


  


  i have tried the following code :

  


  ffmpeg -i 1.gif -i logo.png -filter_complex "[1][0]scale2ref=w=oh*mdar:h=ih*0.1[logo][video];[1]format=rgba,colorchannelmixer=aa=0.5[logo];[0][logo]overlay=(W-w)/2:H-h-5" -c:a copy output.gif


  


  i got the following Error :
Filter scale2ref has an unconnected output

  


• Start ffmpeg sound recording at system start doesn't work

  3 octobre 2022, par CheatingBoy

  I made a python script to record sound at System boot, but it doesn't work. I've tried using crontab and systemd but it doesn't work. If I start the program manually it works out fine.

  


  #!/bin/python3
import RPi.GPIO as GPIO
import time
import datetime
import subprocess
import os
import signal
GPIO.setmode(GPIO.BCM)
GPIO.setup(24, GPIO.IN)
GPIO.setup(23, GPIO.OUT)
print("Started Sound_Recorder_ULtimate_Control")
p = None
while True:
        time.sleep(0.5)
        if GPIO.input(24) == 1:
            if p is None:
                print("Preparing to recorde")
                today = datetime.datetime.now()
                time1 = "{}.{}.{}_{}:{}:{}".format(today.day , today.month, today.year, today.hour, today.minute, today.second)
                # Aufname starten
                command = "sh -c 'ffmpeg -f pulse -nostdin -i alsa_input.usb-FuZhou_Kingwayinfo_CO._LTD_TONOR_TC30_Audio_Device_20200707-00.mono-fallback /home/pi/sound_recorder/Recordes/'" + time1 + ".mp3"
                print(command)
                #subprocess.Popen(command)
                p = subprocess.Popen(command, stdout=subprocess.PIPE, 
                       shell=True, preexec_fn=os.setsid)
                print("Recording...")
                GPIO.output(23, GPIO.HIGH)
                time.sleep(2)    

            else:
                print("Terminate")
                os.killpg(os.getpgid(p.pid), signal.SIGTERM)
                GPIO.output(23, GPIO.LOW)
                p = None
                time.sleep(2)



  


• moviepy ruining video after combining them

  1er juin 2020, par jjakeryan

  I'm trying to make a program that downloads videos from TikTok and combines all the separate videos into one .mp4 file and moves the final video to a folder on my desktop. I've been able to make it download all the videos and when I watch the separate videos they play fine however when I combine the videos some of the videos are messed up and look like this but the audio is fine.

  



  #slecting all .mp4 files
    video_files = glob.iglob("*.mp4")

    print(video_files)
    clips = []

    for clip in video_files:  # For each mp4 file name
        clips.append(VideoFileClip(clip))  # Store them as a VideoFileClip and add to the clips list

    today = date.today()

    final = concatenate_videoclips(clips)  # Concatenate the VideoFileClips
    final.write_videofile(f"{today}.mp4", codec="libx264")


#moving completed video to folder on desktop
    shutil.move(f'{today}.mp4', '/Users/jacobmarrandio/Desktop/done_videos/')


  



  thanks for any help