26 May

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

• 22:33
  Building a backend that processes (& renders) videos [closed] - nils Newest 'ffmpeg' Questions - Stack Overflow
  How would I go about creating an endpoint to merge Sound-Files and Images/GIFs into an mp4 Video in a Node backend? Is there a simple library for that or would I have to use ffmpeg commands? Right now I set up my database using Cloud Firestore - would it make sense to later on publish the whole backend onto Firebase? Essentially I'd like to have a platform that allows people to upload music onto YouTube (So videos with sound and preferably animated videos, so not just still (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 23:07
  avfilter/vf_blend: add support for float formats - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_blend: add support for float formats [DH] libavfilter/vf_blend.c

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

• 22:18
  exo player mp2, aac audio format and avi video format - Muhammet Newest 'ffmpeg' Questions - Stack Overflow
  I use exoplayer but no sound from mp2 and aac audio formats in android application. I get this error when I open mp2 and aac audio format videos "media includes audio tracks but none are playable by this device"and some are not working in .avi format, some are working please can you help meenter image description here enter image description here -- enter image description here, enter image description here
• 21:27
  Movie making from lyrics with timestamps in python - carl Newest 'ffmpeg' Questions - Stack Overflow
  I have lyrics from musixmatch with timestamps. I want to form video with the lyric lines in the video along with images in a file numbered from 1-n. As seen in this post, I thought ffmpeg would be something which can help me but there aren't much information that i can find. Also the answer given by ⓐllogan, gives very vague idea of forming videos with "subtitle filter" in ffmpeg. It would be very helpful you can provide an example to explain your idea.(It can also help other coders at any time :) ) Thanks in (...)
• 20:23
  Mencoder error - merging two video files with same fps, resolution and codec failed - Estatistics Newest 'ffmpeg' Questions - Stack Overflow
  Mencoder error in linux - merging two video files with same fps, resolution and video and audio codec failed. These video files had different fps ratios, video codecs, and Audio codecs but same resolution. I made them to have the same codec by using the below ffmpeg command line per video: ffmpeg -i D1_vid.mp4 -c:v libx264 -refs 3 -x264-params b-pyramid=2 -acodec aac -b:a 327680 D1_video.mp4 However, even i made them to have many other aspects the same ones (e.g. ref frames) according to MediaInfo, they failed to merged under Mencoder: ` (...) --
• 19:37
  Join video in FFmpeg have problem More than 1000 frames duplicated - Bùi Minh Quang Newest 'ffmpeg' Questions - Stack Overflow
  Hello I have this FFMPEG code ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -filter_complex "[0:v]scale=1280x720,setsar=1[v0]; [1:v]scale=1280x720,setsar=1[v1]; [2:v]scale=1280x720,setsar=1[v2]; [v0][0:a][v1][1:a][v2][2:a]concat=n=3:v=1:a=1" output.mp4 But I exec it it give back me this Warring Message: More than 1000 frames duplicated How can I solve it? Plesase help me. (...)
• 19:36
  how to run ffmpeg command(windows) in java - SAI GIRI CHARY AOUSULA Newest 'ffmpeg' Questions - Stack Overflow
  I executed the below FFMPEG terminal command in command prompt successfully. But I am unable to execute this command in my java program. I can execute all other ffmpeg commands which doesn't have double quotation marks, in my java program. Here I have confusing only with double quotation marks("..."). ffmpeg -i "concat:C:\\\\journalism\\\\videos\\\\vid1.ts|C:\\\\journalism\\\\videos\\\\vid2.ts" -c copy C:\\\\journalism\\\\videos\\\\output.mp4 I can execute above in command prompt successfully. But I tried as below in my java (...)
• 19:30
  FFMPEG output to multiple rtmp and synchronize them - voncount Newest 'ffmpeg' Questions - Stack Overflow
  presume I have a video, and I use filter to crop them let say 1/2 and 1/2 width to 2 rtmp output streams. Now 2 clients will subscribe to these stream let say vlc1 - stream 1 | vlc2 - stream 2 how can I synchronize them to play at the same time (I always see 1 client play faster or slower than other) Here is the code ffmpeg -re -stream_loop -1 -i sample.mp4 \\ -filter:v "crop=in_w/2:in_h:0:0" -c:a copy -f flv rtmp://localhost/live/1 \\ -filter:v "crop=in_w/2:in_h:in_w/2:0" -c:a copy -f flv (...)
• 19:04
  Please help me use ffmpeg lt(mod) and gte(mod) - Unlockdtdd Newest 'ffmpeg' Questions - Stack Overflow
  I want to mix and swap several second of my video. For example, every 9 second, first 5 second keep original and I want second 8+9 will be 6+7 and vice versa, 6+7 will be 8+9. I think overlay can work but I still don't know how to work with it.
• 18:12
  Write FFMPEG frame to png/jpeg file - newAgeOfHelloWorld Newest 'ffmpeg' Questions - Stack Overflow
  I have AV_PIX_FMT_YUV420P AVFrame, and I want to write it as PNG or JPEG file, it doesn't matter what format is inside (BGR, BGRA, RGB or RGBA). I tried to save it as AV_PIX_FMT_YUV420P, but I got 3 pictures in one, so I need to convert it to RGB24 first. I do it via: int destW = decCtx->width; int destH = decCtx->height; AVFrame * resFrame = av_frame_alloc(); resFrame->linesize[0] = destW * 3; resFrame->data[0] = (uint8_t*)malloc(resFrame->linesize[0] * destH); SwsContext * ctx = sws_getContext(decCtx->width, decCtx->height,  (...)

Revisions : notation http://zone.spip.org/trac/spip-zone/log/_plugins_/notation

• 15:49
  Revision 124817: Merge pull request 'une notice PHP 7.4 en moins' (#1) from ... - Beurt Revisions : notation
  Merge pull request 'une notice PHP 7.4 en moins' (#1) from Beurt/notation:master into master -- Log
• 15:45
  Revision 124816: une notice PHP 7.4 en moins la notice était « Trying to access array ... - Beurt Revisions : notation
  une notice PHP 7.4 en moins la notice était « Trying to access array offset on value of type null in » -- Log

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

• 16:33
  ffmpeg concat converts multiple videos to chipmunk version with half the video silence - inselmensch Newest 'ffmpeg' Questions - Stack Overflow
  i try to concat multiple videos to one video and add an background music to it. for some reason the background music is perfectly added to the output video but the audio of each part of the output is speed up to a chipmunk version of the video itself. this results in an output video of 7 minutes with about 5 minutes of silence since everything is so fast that all the audio finishes after about 2 minutes. my command is: ffmpeg -safe 0 -i videolist.ffconcat -i bg_loop.mp3 -y -filter_complex "[1:0]volume=0.3[a1];[0:a][a1]amix=inputs=2" -vcodec libx264 -r 25 (...)
• 15:57
  ffmpeg unable to save a frame at specific time - Gowtham Newest 'ffmpeg' Questions - Stack Overflow
  I followed Im getting error "deprecated pixel format used, make sure you did set range correctly using ffmpeg".. can someone check my code below? to save a frame from a video but the saved frame is of timestamp 00:00:00 instead of the given timestamp $ ffmpeg -i 001\\ Introduction.mp4 -ss 00:03:12.00 -vframes 1 side_view.jpg ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.3.0 (Gentoo 9.3.0 p2) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-4.2.2/html --mandir=/usr/share/man (...) -- https://gist.github.com/GowthamKudupudi/d3703f990548819a5bcd5e72bd5c0449
• 17:10
  how to scale server setup with ffmpeg for converting videos on website - Tom Newest 'ffmpeg' Questions - Stack Overflow
  I have a website that will offer video conversion service with ffmpeg. Users will select some options and click a button to process and create a video. The site is currently using laravel/php. If there are many requests at the same time, how should I handle the scaling up? How can it be done with traditional ISP? How about cloud service, e.g. Amazon, Digital Ocean?
• 14:35
  FFMPEG command is not Working when set project's target SDK version 29(Android Q issue) - SAVALIYA REENA Newest 'ffmpeg' Questions - Stack Overflow
  I am using the FFMPEG library to get a watermark stamp on video. It is working like charm in all versions when my project's target SDK version is 28 but when i set target sdk version 29, It gives me below exception. E/FFmpeg: Exception while trying to run: [Ljava.lang.java.io.IOException: Cannot "/data/user/0/com.videowatermark.addtextandtimestampongalleryvideos/files/ffmpeg": error=13, Permission denied Caused by: java.io.IOException: error=13, Permission denied at java.lang.UNIXProcess.forkAndExec(Native Method) at java.lang.UNIXProcess.(UNIXProcess.java:133) at (...)
• 12:55
  Center crop image overlay using FFmpeg - HB. Newest 'ffmpeg' Questions - Stack Overflow
  I currently have an image that is being overlayed on top of a video, as demonstrated in this image: The blue square is representing the video and the purple lines are representing the image on top of the video. Currently, I have the following command: "-i", InputVideoPath, "-i", InputImagePath, "-filter_complex", "[0:v]scale=iw*sar:ih,setsar=1,pad='max(iw\\\\,2*trunc(ih*9/16/2))':'max(ih\\\\,2*trunc(ow*16/9/2))':(ow-iw)/2:(oh-ih)/2[v0];[1:v][v0]scale2ref[v1][v0];[v0][v1]overlay=x=(W-w)/2:y=(H-h)/2[v]", "-map", "[v]", (...) -- , , ,
• 12:25
  How do I use FFmpeg to fetch an audio from a local network and decode it to PCM? - Yousef Alaqra Newest 'ffmpeg' Questions - Stack Overflow
  Currently, I have a node js server which is connected to a specific IP address on the local network (the source of the audio), to receive the audio using VBAN protocol. VBAN protocol, basically uses UDP to send audio over the local network. Node js implementation: http.listen(3000, () => console.log("Server running on port 3000"); ); let PORT = 6980; let HOST = "192.168.1.244"; io.on("connection", (socket) => console.log("a user connected"); socket.on("disconnect", () => console.log("user disconnected");  (...)
• 12:17
  ffmpeg horizonal flip makes video shorter - Adam Gosztolai Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use the following command to flip my video horizontally ffmpeg -i video.mp4 -vf hflip -c:a copy video_flip.mp4 However, I discovered that it makes the video shorter, which I did not intend. I originally created the video using FFMpegWriter in Python, the code looks something like this metadata = dict(title='video', artist='me', comment='Watch this!') writer = FFMpegWriter(fps=25, metadata=metadata) with writer.saving(fig, "video.mp4", 100): for t in range(100): ax.cla()  (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 11:34
  hwcontext_vulkan: use dedicated allocation for buffers when necessary - Lynne git.videolan.org Git - ffmpeg.git/rss log
  hwcontext_vulkan: use dedicated allocation for buffers when necessary [DH] libavutil/hwcontext_vulkan.c
• 13:01
  hwcontext_vulkan: fix uploading and downloading from/to flipped images - Lynne git.videolan.org Git - ffmpeg.git/rss log
  hwcontext_vulkan: fix uploading and downloading from/to flipped images We want to copy the lowest amount of bytes per line, but while the buffer stride is sanitized, the src/dst stride can be negative, and negative numbers of bytes do not make a lot of sense. [DH] libavutil/hwcontext_vulkan.c

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

• 10:29
  How do I preserve side data when concatenating files in ffmpeg? - Mark Kahn Newest 'ffmpeg' Questions - Stack Overflow
  I have multiple 360 videos that I'm trying to concatenate in ffmpeg. The command it self is pretty straightforward: ffmpeg -f concat -i 0036_concat.txt -c copy -strict unofficial 36.mp4 where 0036_concat.txt is just a list of the individual files. The issue I'm having is that I can't get ffmpeg to preserve side data. Very simply put, ffprobe on any of the source files includes this: Side data: spherical: equirectangular (0.000000/0.000000/0.000000) And I can't, for the life of me, get that to propagate to the output (...)
• 09:53
  Use Static Library Build Shared Library Undefined Reference - Leo Newest 'ffmpeg' Questions - Stack Overflow
  I want to use AndroidStudio ndk-build to build Shared Library on Window with ffmpeg lib but i got Undefined Reference Error,Please tell me what I do wrong ndkVersion = 21.0.6113669 compileSdkVersion 29 I also try to build By GCC , the same error happen I also try to build By CMake with ffmpeg SourceCode , the same error happen I try to build .a file with some simple C Code on gcc and use another C Code to use it,it work,but not with ffmpeg .a file i dont know why this is my Android.mk `LOCAL_PATH := $(call my-dir) include (...)
• 03:45
  looking for gui based HLS downloader based on ffmpeg & or better download code [closed] - wahiduzzaman sagar Newest 'ffmpeg' Questions - Stack Overflow
  currently using ffmpeg for downloading HLS video (m3u8). the code i am using is ffmpeg -i "www.videoURL.com" -c copy "name name".mp4 its works fine but the problem is it takes a bit more time since I also have to give each video a name where other downloader (video downloadhelper) can automatically get a name from URL. video downloadhelper crashing/stopping a lot so not using it now. also it cant boost speed so i have to run 10-12 simultaneous ffmpeg download with command prompt open to keep the bandwidth use high. which is cluttering the screen and being hard to (...)
• 10:54
  How to Use FFmpeg to Fetch an Audio From Local Network and Decode it to PCM? - Yousef Alaqra Newest 'ffmpeg' Questions - Stack Overflow
  Currently, I have a node js server which is connected to a specific IP address on the local network (the source of the audio), to receive the audio using VBAN protocol. VBAN protocol, basically uses UDP to send audio over the local network. Node js implementation: http.listen(3000, () => console.log("Server running on port 3000"); ); let PORT = 6980; let HOST = "192.168.1.244"; io.on("connection", (socket) => console.log("a user connected"); socket.on("disconnect", () => console.log("user disconnected");  (...)
• 08:02
  Nodejs - ffmpeg - unable to live convert webcam to hls file - Jeff55 Newest 'ffmpeg' Questions - Stack Overflow
  Okay so long story short: I need to be able to accept a video stream from my usb port and offer this up to my frontend (React) using HLS/RTMP/WebRTC. I opted for HLS because it seems to have the least amount of dependencies and this may end up running on a Pi, so simplicity is good. const spawn = require('child_process'); var args = [ '-pix_fmt', 'uyvy422', '-f', 'avfoundation', '-framerate', '30', '-i', '0', '-c:v', 'libx264',  (...)
• 04:21
  How to bulk convert .avi to .mkv with ffmpeg and add specific meta title without lossing quality? - Ayush Patel Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert a folder of 361 .avi files to .mkv... And at time of encoding I need to add specific meta titles as:-"cartoon T&J"... Eg: Input file: Ep01.avi output file: Ep01 cartoon T&J.mkv (meta title as "cartoon T&J" )
• 03:55
  FFmpeg freezes during trim, concat and add watermark - Nguyễn Trọng Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to cut each video and change the speed of each, then I join them and finally add watermark. I calculated the percentage of the process and found it was working fine but it did not run to the onFinished function but stood still.I do not have a lot of clues why it happens. Anybody experienced something similar? cmd = [-y, -i, /storage/emulated/0/Story Saver/test.mp4, -i, /storage/emulated/0/.FXMotion/.LOGO/logo_watermark.png, -filter_complex_script, /storage/emulated/0/.FXMotion/.Script/script.txt, -map, [vw], -c:v, libx264, -pix_fmt, yuv420p, -crf, 18, -preset, (...) -- content script
• 04:38
  How to get a list of video devices with a particular VendorID and/or ProductID using FFmpeg (on Mac OS) - mcgregor94086 Newest 'ffmpeg' Questions - Stack Overflow
  The master task: I am writing software for a multiple USB camera array. The camera may be connected to a CPU that has other USB cameras builtin or attached. I need to capture one 1920x1080 JPG image from EACH of MY array's cameras into a directory of images - but I need to EXCLUDE any OTHER cameras when taking pictures. Right now I am trying to implement for MacOS, but in the future I will be implementing for Windows, Linux, iOS and Android. What is known: I know the VendorID, ProductID and UniqueID (reported by the MacOS USB system System (...)
• 04:52
  Error of FFmpeg on Java in "av_image_copy_to_buffer" method during decoding H.264 stream - maru2213 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to decode H.264 stream, which is sent over Socket from an Android application to a computer. And I also want to show the decoded stream using JavaFX. I searched for a long time, and decided to use JavaCV / FFmpeg. However I got error from FFmpeg. (I was inspired by this code.) Questions: Why does FFmpeg make error? Is it a correct way to convert AVFrame to javafx.scene.image.Image? I'm using: javacv-platform 1.4.4 ffmpeg-platform 4.1-1.4.4 Code: This is a part of import and class (...) -- this code