14 July

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 04:38
  FFmpeg outputs video with wrong frame rate when using input pipe - Eduardo Lemus Newest 'ffmpeg' Questions - Stack Overflow
  I am using FFmpeg to convert animated GIF to WEBM video in C#. While this seems to work fine by passing file paths as input/output, my goal is to prevent any access to disk so I'm trying out named pipes instead. The following options to read the output from a named pipe apparently works fine: ffmpeg -f image2pipe -i input.gif -c:v libvpx-vp9 -b:v 0 -crf 30 -an -y -f webm \\\\.\\pipe\\fromFFmpeg but when trying to provide also the input from a named pipe, the output WEBM plays at what seems to be the wrong framerate making a 5-6 secs animation to last ~2 (...)
• 03:58
  How to apply drawtext and watermark at the same time? - DaveG Newest 'ffmpeg' Questions - Stack Overflow
  drawtext cmd: ffmpeg -ss 100 -t 5 -i input.mp4 -vf "drawtext=text=HELLO:fontsize=60" output_1.mpeg watermark cmd: ffmpeg -ss 100 -t 5 -i input.mp4 -i watermark.png -filter_complex "overlay=10:10" output_2.mpeg but what if I want to apply these two cmd at the same time?
• 02:36
  ffmpeg - does the position of the "-preset" option matter? - Vahid Pazirandeh Newest 'ffmpeg' Questions - Stack Overflow
  Does it matter where in the order of arguments I place the -preset option? Ex: ffmpeg -i source.mp4 -c:v libx264 -b:v 1.5M -c:a aac -b:a 128k -preset fast target.mp4 vs. ffmpeg -i source.mp4 -preset fast -c:v libx264 -b:v 1.5M -c:a aac -b:a 128k target.mp4
• 01:19
  I'm using the following code to convert YouTube videos into audio but getting error despite installing ffmpeg - Umar Iqbal Newest 'ffmpeg' Questions - Stack Overflow
  This is the code I'm using and the error I'm getting: Code: from future import unicode_literals import youtube_dl ydl_opts = 'format': 'bestaudio/best', 'postprocessors': [ 'key': 'FFmpegExtractAudio', 'preferredcodec': 'mp3', 'preferredquality': '192', ], with youtube_dl.YoutubeDL(ydl_opts) as ydl: ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc']) Error: DownloadError: ERROR: ffprobe/avprobe and (...)

13 July

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:03
  Playing a video with JavaCV and FFmpeg - Wamasa Newest 'ffmpeg' Questions - Stack Overflow
  So, I'm developing a custom video player for Android but I need to play more than the android supported video files (mp4, 3gp...), like wmv, avi, flv. At this time I do already convert any video type to .mp4 and I'm able to play them after recoding, but I have no idea how can I play those wmv, avi files without recoding them to mp4 video formats. Is there any way I can play any video on Android without recoding them? JavaCV + FFmpeg library already working, just don't know how to do that. By the way, heres the code that I'm using (...)
• 21:52
  Using FFMPEG with Xvfb, Can't get a smooth video output - Emax Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream to twitch from a linux server, I've installed Xvfb and FFMPEG, the live starts fine, but I can't get a smooth video output. Setps: Xvfb :1 -screen 0 1920x1080x24 & export DISPLAY=:1 ffmpeg -probesize 60M -video_size "1920x1080" -framerate 60 -f x11grab -i :1.0 -f flv -ac 2 -crf 23 \\ -vcodec libx264 -g 120 -b:v 3000k -minrate 3000k -maxrate 3000k -pix_fmt yuv420p\\ -s "1920x1080" -preset veryfast -tune zerolatency -acodec libmp3lame -threads 4 -strict normal \\ -bufsize 12000k (...)
• 21:33
  Is it possible to add stroke to text in ffmpeg? - Svetlana Gajic Newest 'ffmpeg' Questions - Stack Overflow
  I would like to add black stroke to text in ffmpeg. Is it possible? -c:v libx264 -vf "hue=h=0, drawtext=fontfile=../bin/RobotoCondensed-Bold.ttf:text='Hello.':fontcolor=white: fontsize=158: x=0+(w-text_w)/2: y=50+(h-text_h-line_h)/2" -c:a copy -shortest -pix_fmt yuv420p ../bin/ENG_01.mov
• 19:16
  Generate video from numpy arrays with openCV - daVinci Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use the openCV VideoWriter class to generate a video from numpy arrays. I am using the following code: import numpy as np import cv2 size = 720*16//9, 720 duration = 2 fps = 25 out = cv2.VideoWriter('output.avi', cv2.VideoWriter_fourcc(*'X264'), fps, size) for _ in range(fps * duration): data = np.random.randint(0, 256, size, dtype='uint8') out.write(data) out.release() The codec seems to be installed as ffmpeg can do conversions to the x264 codec and libx264 is installed. The code runs (...)
• 18:52
  Memory limit error using ffmpeg on heroku - Scherer Newest 'ffmpeg' Questions - Stack Overflow
  I have a Flask app running on Heroku and what I am trying to do is use FFmpeg to re-encode a video to x265. For that, I have the following route ⓐapp.route('/x265', methods=['POST']) def rotax265(): up_file = request.files['file'].stream in_file = tempfile.TemporaryFile() in_file.write(up_file.read()) in_file.seek(0) out_file = tempfile.TemporaryFile() conv = VideoConverter(in_file, out_file) conv.x265() out_file.seek(0) return out_file.read() It uses a VideoConverter class (...) -- ffmpeg-python
• 18:04
  Unhandled stream error in pipe: write EPIPE in Node.js - Michael Romanenko Newest 'ffmpeg' Questions - Stack Overflow
  The idea is to serve screenshots of RTSP video stream with Express.js server. There is a continuously running spawned openRTSP process in flowing mode (it's stdout is consumed by another ffmpeg process): function spawnProcesses (camera) var openRTSP = spawn('openRTSP', ['-c', '-v', '-t', camera.rtsp_url]), encoder = spawn('ffmpeg', ['-i', 'pipe:', '-an', '-vcodec', 'libvpx', '-r', 10, '-f', 'webm', 'pipe:1']);  (...)
• 18:01
  Im failing to build .so file for android from FFMPEG - yejafot Newest 'ffmpeg' Questions - Stack Overflow
  I tried many times with different versions of ffmpeg but failed eventually. I dont know how they wrote .sh file to configure different tools. Here are some .sh files i tried and it all failed. Either it shows only android/share folder instead of android/include android/lib android/share OR i end up in error like no file or folder exist,etc I will share build_arm64-v8a different version of files below VERSION 1 #!/bin/bash export NDK=/media/sf_sharing/android-ndk export HOST_TAG=linux-x86_64 # adjust to your building (...)
• 17:54
  FFMPEG creating video which have blinking opacity overlay - Nikhil Solanki Newest 'ffmpeg' Questions - Stack Overflow
  I am creating video which has an overlay of black color which is continuously changing opacity from 0.0 to 1.0(which means blinking). So, I am setting color as input and set it with blend=all_mode='overlay':all_opacity=0.5 full command: ffmpeg -i combine2.mp4 -loop 1 -i image1.png -i song.mp3 -f lavfi -i "color=black:s=540x960" -t 20 -filter_complex "[0]split=2[color][alpha]; [color]crop=iw/2:ih:0:0[color]; [alpha]crop=iw/2:ih:iw/2:ih[alpha]; [color][alpha]alphamerge[v1]; [1]scale=540:960, setsar=1[v2]; [3]scale=540:960, format=yuv420p, loop=-1:size=2048, (...)
• 16:57
  janus Streaming plugin choppy video - Lucas Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to read the stream from RTSP to do some process(AI) then push the frame to Janus using FFMPEG. Currently, I am using libvpx (Vp8) format for this. but my Video is very choppy on playback. It is breaking a lot. I am adding by FFmpeg pipeline. not sure what is the issue. I am new to this. I found Janus really simple to use. but this is giving me a headache. it is like breaking/freezing so badly. My setup is Janus running in a container with a network as the host . I use WebSocket + HTTP to play stream through UI  (...)
• 16:33
  discord.py - Playing the same audio stream in several voice channels - Cyxo Newest 'ffmpeg' Questions - Stack Overflow
  I made a Discord bot using the discord.py library which aims at playing a web radio in several voice channels. Basically it's the same audio stream for every channel. What I'm doing right now is: voice_channel.play(discord.FFmpegPCMAudio(stream_url)) However every FFmpegPCMAudio uses about 10% of my CPU and there's one for each vc so eventually my bot crashed a lot when playing in 10 channels (which isn't a lot). Since it's the same stream, I tried the following: player = FFmpegPCMAudio(stream_url) for voice_channel in vcs:  (...)
• 18:18
  FFmpeg starting manually but not with Systemd on boot - eKrajnak Newest 'ffmpeg' Questions - Stack Overflow
  On Raspberry Pi 4 B 4GB with official Debian 10 image, I have /home/pi/run.sh script with following: #!/bin/bash ffmpeg -nostdin -framerate 15 -video_size 1280x720 -input_format yuyv422 -i /dev/video0 -f alsa -i hw:Device \\ -af acompressor=threshold=-14dB:ratio=9:attack=10:release=1000 -c:a aac -ac 2 -ar 48000 -ab 160k \\ -c:v libx264 -pix_fmt yuv420p -b:v 3M -bf 1 -g 20 -flags +ilme+ildct -preset ultrafast \\ -streamid 0:0x101 -streamid 1:0x100 -mpegts_pmt_start_pid 4096 -mpegts_start_pid 0x259 -metadata:s:a:0 language="" -mpegts_service_id 131 (...)
• 15:30
  FFMPEG php HLS and DASH conversion - Angus Simons Newest 'ffmpeg' Questions - Stack Overflow
  I'm using this repo https://github.com/aminyazdanpanah/PHP-FFmpeg-video-streaming to encode video in hls and then reproduce on the front end. After creating all the hls segments correctly the php script fail to execute the command below. The command getting error is the next one: '/usr/bin/ffmpeg' '-y' '-i' 'source.mp4' '-c:v' 'libx264' '-c:a' 'aac' '-bf' '1' '-keyint_min' '25' '-g' '250' '-sc_threshold' '40' (...) -- https://github.com/aminyazdanpanah/PHP-FFmpeg-video-streaming
• 12:32
  Fastest way to extract frames using ffmpeg? - Stpn Newest 'ffmpeg' Questions - Stack Overflow
  Hi I need to extract frames from videos using ffmpeg.. Is there a faster way to do it than this: ffmpeg -i file.mpg -r 1/1 $filename%03d.jpg ?
• 12:28
  ffmpeg 4.3 build failure on Mac OS 10.12.6 - yay nay Newest 'ffmpeg' Questions - Stack Overflow
  I have, by mistake, aborted the install of svtplay-dl via homebrew, while the gcc dependency was installing. I did the "brew cleanup", after which the ffmpeg simply dissappeared from the command line. I have reinstalled the gcc to the latest available version (via homebrew) only to find the same error several times: enter code here"==> Installing dependencies for homebrew-ffmpeg/ffmpeg/ffmpeg: icu4c and x264 ==> Installing homebrew-ffmpeg/ffmpeg/ffmpeg dependency: icu4c ==> ./configure --prefix=/usr/local/Cellar/icu4c/67.1 --disable-samples --disable-tests (...)
• 12:11
  Is it possible to concatenate few videos together, setting their timings and displaying background image, if no video for the current frame? - Valeryi Cherdakov Newest 'ffmpeg' Questions - Stack Overflow
  I have an audio track, say, a few minutes long, as well as several short videos of several tens of seconds. For each of these videos I have a timing - the video should start at a certain second. The audio tracks of these videos are not needed. The output video should last exactly as long as the audio lasts. If at the moment there is no video to display, a picture should be displayed (as if the picture is on layer #1, and the rest of the videos are on layer #2). Is it possible to complete this task using a command or a series of ffmpeg (...)
• 11:57
  Install ffmpeg package inside docker container - Yaran Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to install ffmpeg package inside dockerfile, but after that ffmpeg package was not installed. Here is my dockerfile: FROM ubuntu:18.04 FROM maven:3.6.0-jdk-11-slim AS build COPY src /home/app/src COPY pom.xml /home/app RUN mvn -f /home/app/pom.xml clean package -DskipTests RUN apt-get update -y && apt-get install -y ffmpeg FROM openjdk:11-jdk COPY --from=build /home/app/target/car-1.0.jar /home/car.jar EXPOSE 8080:8080 ENTRYPOINT ["java","-jar","/home/car.jar"] If I enter inside docker container and (...) -- https://hub.docker.com/r/mwader/static-ffmpeg/
• 09:37
  FFMPEG show audio frequency waves with border - Nikhil Solanki Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate sine waves or audio frequency like using this command: ffmpeg -i combine2.mp4 -i image1.png -i song.mp3 -t 20 -filter_complex "[0]split=2[color][alpha]; [color]crop=iw/2:ih:0:0[color]; [alpha]crop=iw/2:ih:iw/2:ih[alpha]; [color][alpha]alphamerge[v1]; [1]scale=540:960, setsar=1[v2]; [2]showfreqs=s=540x100:mode=line:ascale=sqrt:colors=white|red[v3]; [v2][v3] overlay=main_w-overlay_w:main_h-overlay_h-10[v4]; [v4][v1] overlay=1" output_video2.mp4 -y This command shows frequency of audio with white colour only and also its not smooth as (...) -- ,
• 09:05
  Blank out video frames for last two minutes of MP4 (while keeping audio intact) - fourells5 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to make a copy of one of my mp4 movies with audio intact, but blacking out video frames only on the last few minutes. Basically I want to keep the end credit music but without the artifacted video. I found this answer: which works perfectly for an entire mp4 file (including a test fragment I made of the above ending credits sequence), but I need it applied as I stated above to just the end of the entire copied full mp4. In this case I don't want to start blanking the video stream frames until after 2h 7m 30s. I messed around with combinations of the -ss, (...)
• 08:52
  Create a subtitle mpd file with MP4box - 123abc Newest 'ffmpeg' Questions - Stack Overflow
  I'm creating a mpd file for a video player and for now I have everything to cover the video, audio and language settings but I'm struggling with the subtitles. Here's the command I used for audio and video : mp4box -dash 10000 -profile dashavc:264:onDemand -rap video/audio.mp4#audio/video
• 06:50
  FFMPEG creating puzzle pieces video from an image - Nikhil Solanki Newest 'ffmpeg' Questions - Stack Overflow
  I am creating puzzel solving video of a picture. My output must be in w540:h960 and divided puzzel pieces(image pieces) into 4*4=16 pieces puzzel. So, after referring this answer I also followed that: ffmpeg -i background.jpg -i image1.jpg -t 14 -filter_complex "[0]scale=540:960[bg]; [1]split=16[a][b][c][d][e][f][g][h][i][j][k][l][m][n][o][p]; [a]crop=iw/4:ih/4:0*iw/4:0*ih/4[a]; [b]crop=iw/4:ih/4:1*iw/4:0*ih/4[b]; [c]crop=iw/4:ih/4:2*iw/4:0*ih/4[c]; [d]crop=iw/4:ih/4:3*iw/4:0*ih/4[d]; [e]crop=iw/4:ih/4:0*iw/4:1*ih/4[e]; [f]crop=iw/4:ih/4:1*iw/4:1*ih/4[f]; [
• 06:10
  write procedurally generated audio to ffmpeg from python script - Mei Zhang Newest 'ffmpeg' Questions - Stack Overflow
  I have a python script that writes procedurally generated images to ffmpeg to create a video: import subprocess from PIL import Image width, height = 600, 300 cmd = [ "ffmpeg", "-s", f"widthxheight", "-pix_fmt", "rgba", "-f", "rawvideo", "-i", "-", "output.mp4", "-y" ] p = subprocess.Popen(cmd, stdin=subprocess.PIPE) for _ in range(500): img = Image.new("RGBA", (width, height), (200, 0, 0)) p.stdin.write(img.tobytes()) p.stdin.close() How can I extend this script to also write (...)
• 03:53
  How to use FFmpeg & "tee" to UDP video (only) stream to another computer while recording to computer with USB camera - pomptondrive Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to get "tee muxer" to work with FFmpeg, but I'm not having much luck. Basically I would like to stream a USB camera with UDP to another computer with an decent/acceptable result to monitor, while recording around 15 FPS in an economical (compressed) fashion that won't take up too much disk space. Honestly, I don't understand the entire syntax of using "tee"--I guess that's obvious. I have looked at some of the FFmpeg documentation, but it doesn't seem comprehensive enough in this instance. So, currently, I have experimented a little and this (...)
• 03:22
  how to use cgroups in php exec - Skora Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use cgroups in php And I did the following : sudo cgcreate -g cpu:/www-data sudo cgset -r cpu.cfs_period_us=1000000 www-data sudo cgset -r cpu.cfs_quota_us=100000 www-data And when I do use it on ffmpeg via the terminal it works fine But when I used it in php like : exec("cgexec -g cpu:www-data ffmpeg -i music.mp3 -ac 1 -map 0:a -acodec libopus -b:a 64k -vbr off -ar 24000 music.ogg"); does not work Can it be used with (...)
• 00:18
  Add watermark-overlay with -filter_complex to multiple outputs (dash) - Werner Newest 'ffmpeg' Questions - Stack Overflow
  I'm creating a set of files for DASH (without audio) with: ffmpeg -i "input.mov" -y -keyint_min 100 -g 100 -sc_threshold 0 -c:v libx264 -pix_fmt yuv420p -map v:0 -s:0 320x180 -b:v:0 681.125k -maxrate:0 681.125k -bufsize:0 340.5625k -map v:0 -s:1 640x360 -b:v:1 2724.5k -maxrate:1 2724.5k -bufsize:1 1362.25k -map v:0 -s:2 1280x720 -b:v:2 5449k -maxrate:2 5449k -bufsize:2 2724.5k -map v:0 -s:3 1920x1080 -b:v:3 10898k -maxrate:3 10898k -bufsize:3 5449k -init_seg_name "myname_$RepresentationID$.$ext$" -media_seg_name (...)
• 00:09
  FFMPEG: writing the header to MKV container - Pol.H Newest 'ffmpeg' Questions - Stack Overflow
  In my project am capturing the desktop "gdigrab" and encode the stream to x264 and save it to a file. This works great when using containers such as MP4 and MPEG1. But when choosing MKV as container i get below output during the call to avformat_write_header **Stream #0:0, 0, 0/0: Video: h264, 1 reference frame, yuv420p, 1920x1080 (0x0), 0/1, q=2-31, 4 kb/s, 0.02 fps [matroska ⓐ 000002694acc5600] get_metadata_duration returned: 0 Invalid data found when processing input My question is: do i have to add a duration in order to use MKV, as stated in the error message (...)
• 00:04
  How to save an audiostream with ffmpeg - Nico Eymael Newest 'ffmpeg' Questions - Stack Overflow
  I want to save an audiostream from beatport.com with ffmpeg. The audiostream is: https://www.beatport.com/track/maximal-happiness/13855065 Outputfile: audiotrack1.aac I know that the music is streamed in aac format. I want my output file to be also aac. I've looked up in which format it is being streamed. So in cmd I write : ffmpeg -i https://www.beatport.com/track/maximal-happiness/13855065.aac -vn -c:a copy audiotrack1.aac My cmd answers me : https://www.beatport.com/track/maximal-happiness/13855065: Invalid data found when processing (...) -- https://www.beatport.com/track/maximal-happiness/13855065,