20 septembre

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

• 18:52
  Extract just the audio link from a youtube video without converting - MR-4O4 Newest 'ffmpeg' Questions - Stack Overflow
  I know there are hundreds of sites to convert youtube video to mp3. Most of them do it by first downloading the video and then converting it to mp3(or any other audio format) on their server using youtube-dl, ffmpeg or similar programs. What I want to know is, is there any way I can just extract the audio link for any youtube video? I don't know if it's possible but I saw a couple of websites doing it . First Website : Openaisearch.com This website simply gives a download link for the audio(getting it from youtube videos). I searched for a song and saw (...) -- Openaisearch.com, http://keepvid.com/?url=https://www.youtube.com/watch?v=PT2_F-1esPk
• 16:32
  SPM binary target, additional frameworks not being included - Darren Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to integrate a binaryTarget into a project using Swift Package Manager. The binary comes as a .zip containing the main ffmpegkit.xcframework plus 7 additional .xcframework's that it depends on. Here's the folder structure from DerivedData/.../SourcePackages/artifacts/... after SPM has unzipped it. This is my Package.swift file: // swift-tools-version: 5.10 import PackageDescription let package = Package( name: "converter", platforms: [ .macOS(.v13), .iOS(.v14), ], products: [ .library(  (...) --
• 14:45
  FFMPEG - Struggling to find correct input audio codec parameters on macOS - Xavi Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to read my external stereo microphone with ffmpeg within my Qt Windows+macOs application, but I am struggling to obtain consistent correct input codec parameters on macOs. My findings and suspicions so far: The code I'm using in macOs is the following, where everything returns a successful return code: avdevice_register_all(); //macOs only, the same code in windows looks for "dshow" const AVInputFormat *inputFormat = av_find_input_format("avfoundation"); AVFormatContext* inputFormatContext;  (...)
• 04:47
  Decode a Twitch Stream to raw RGBA data ussing FFMPEG [closed] - ZeunO8 Newest 'ffmpeg' Questions - Stack Overflow
  As the title states, I would like to take a Twitch stream, say the one at (https://www.twitch.tv/selectfm) and pass the URI to a formatContext for decoding packets in realtime. How would I go about getting a URI to a video stream so that I can pass to FFMPEG. I am using C++ to handle all my FFMPEG related tasks -- https://www.twitch.tv/selectfm
• 13:46
  ImportError: No module named 'pydub' - ensminger Newest 'ffmpeg' Questions - Stack Overflow
  I am creating a simple script that will use pydub to fetch files from a directory based on their name, then stitch a few of them together and export the result. I had the script working great in a Windows environment (Win 7, python 3.4), but now I'm trying to run on OSX. I have installed all necessary components - ffmpeg, libav. I have just installed pydub with pip, pulling directly from github. My file starts with the input statement from pydub import AudioSegment, and this is what I get: Traceback (most recent call last): File (...) -- github
• 11:55
  Merge N mono audio files to one multichannel file without channel layout - Ilya Newest 'ffmpeg' Questions - Stack Overflow
  As I understand channel layout not required and I can make arbitrary amount of channels in an audio file. Could you help me with merging channels from N audio files into one multichannel file? For example from mp3/wav/m4a/opus to wav/opus?
• 08:52
  Concatenate multiple Genrated Output Video files using single command - Vinesh Chauhan Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to Build a FFMPEG command that accept 4 input Videos and generate the output video with 2x2 Grid also play all those video one after another one. so Archive this I have pass lavfi 4 inputs with duration with size. then I have passed 4 input videos. then I have first generate thumbnail of those videos, so what I am gonna do is I place first video and second thumbnail in hstack, third thumbnail and fourth thumbnail in hstack the both hstack output in vstack. i will do it this 4 times for all videos respectively and then lastly I am trying to contact all those video in one. but I (...) -- https://zippyshare.day/c0vhq9MvIMUTb8i/file
• 02:19
  Transcode a video with FFMPEG C API gives error: Could not get pixel format for color format 'yuvj420p' range 'pc' - Yuukino Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to transcode a video with the FFMPEG C API but am getting this error: [h264_videotoolbox ⓐ 0x7faf92306800] Could not get pixel format for color format 'yuvj420p' range 'pc'. [h264_videotoolbox ⓐ 0x7faf92306800] Error: Cannot convert format 12 color_range 2: -22 I am creating the encoder as follows by copying the codec parameters from the input stream to the newly created encoder: AVStream *input_stream = input_format_context->streams[0]; AVCodec *codec = avcodec_find_encoder(input_stream->codecpar->codec_id); // Create the (...)
• 02:22
  Should I open source my source code when I rebuild ffmpeg and dynamiclly link to my program? - openjz Newest 'ffmpeg' Questions - Stack Overflow
  I have a c++ program developed on visual studio 2022, and my program need to work with ffmpeg, I rebuild it and I don't know if there is open source problem. I rebuild ffmpeg for windows msvc paltform (according to https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC) by customize the build configuration, but I don't modify the source code and build script of ffmpeg, and I don't enable gpl or gpl v3 in the build configuration, ffmpeg is dynamiclly linked to my program, I'm sure that the only license I should concern is the LGPL-2.1 or later, in this case, (...) -- https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC

19 septembre

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

• 19:09
  2 files found with path 'lib/arm64-v8a/libc++_shared.so' from inputs...-react native - CrackerKSR Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to enable package of ffmpeg-kit-react-native in react-native. The sample commands given in the example executes successfully. But I want to use libwebp for converting gif files to webp which is under package named video. As instructed . I have to enable the package to use some libraries. 2.2.1 Enabling a Package on Android Edit android/build.gradle file and add the package name in ext.ffmpegKitPackage variable. ext ffmpegKitPackage = "" So I added a line in the node_module/ffmpeg-kit-react-native/android/build.gradle android (...) -- ffmpeg-kit-react-native, example, package, instructed
• 15:53
  Remove sequentially duplicate frames when using FFmpeg - metlira Newest 'ffmpeg' Questions - Stack Overflow
  Is there any way to detect duplicate frames within the video using ffmpeg? I tried -vf flag with select=gt(scene\\,0.xxx) for scene change. But, it did not work for my case.
• 16:10
  ffmpeg is lossing quality - gabriel guzman Newest 'ffmpeg' Questions - Stack Overflow
  I have this in ffluent ffmpeg const ffmpegPath = require('ⓐffmpeg-installer/ffmpeg').path; const ffmpeg = require('fluent-ffmpeg'); ffmpeg.setFfmpegPath(ffmpegPath); ffmpeg() .input(videoDetails.imagePath) .input(audioPath) .audioCodec('aac') .videoCodec('libx264') .outputOptions([ '-crf 0', '-preset veryslow' ]) .on('end', () => console.log('Video generado correctamente'); resolve(videoDetails); // Retorna el objeto videoDetails si (...)
• 13:37
  ffmpeg concat: "Unsafe file name" - sers Newest 'ffmpeg' Questions - Stack Overflow
  Trying to convert a bunch of mts-files into a big mp4-file: stephanⓐrechenmonster:/mnt/backupsystem/archive2/Videos/20151222/PRIVATE/AVCHD/BDMV$ ~/bin/ffmpeg-git-20160817-64bit-static/ffmpeg -v info -f concat -i <(find STREAM -name '*' -printf "file '$PWD/%p'\\n") -deinterlace -r 25 -s hd720 -c:v libx264 -crf 23 -acodec copy -strict -2 ~/tmp/Videos/20151222.mp4 ffmpeg version N-81364-gf85842b-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2016 the FFmpeg developers built with gcc 5.4.1 (Debian 5.4.1-1) 20160803 configuration: (...)
• 12:45
  How to Crop Video in Kotlin Similar to Image Cropping Using FFmpeg? [closed] - Hafsa Azram Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently working on a Kotlin application where I need to crop videos in a manner similar to how images are cropped (i.e., selecting a rectangular area of the video to keep, rather than just trimming time segments). I'm using FFmpeg for video processing, but I'm encountering issues with the cropping commands. If FFmpeg is not suitable for video cropping, what other libraries or tools are available for this purpose in Kotlin? How can I integrate and use these libraries in my project for cropping (...)
• 13:41
  Concat Command Issue in FFMPEG - Vinesh Chauhan Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to Build a FFMPEG command that accept 4 input Videos and generate the output video with 2x2 Grid also play all those video one after another one. so Archive this I have pass lavfi 4 inputs with duration with size. then I have passed 4 input videos. then I have first generate thumbnail of those videos, so what I am gonna do is I place first video and second thumbnail in hstack, third thumbnail and fourth thumbnail in hstack the both hstack output in vstack. i will do it this 4 times for all videos respectively and then lastly I am trying to contact all those video in one. but I (...) -- https://zippyshare.day/c0vhq9MvIMUTb8i/file
• 11:12
  How do I write a batch file that opens a msys shell and then run commands in the shell? - cxu Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to automate the process of building ffmpeg on Windows 10. I'm following the guide here: https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC Everything works fine when I do it manually, however I want to write a batch file that I can run to go through the entire process automatically. Building requires me to set up the Visual Studio environment and the MSYS environment. This is where I'm having trouble, since running the MSYS environment opens up a new shell. I want to pass the configure/make/make install commands to the MSYS shell after it is (...) -- https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC
• 09:10
  FFmpeg leaves green pixels in a simple video [closed] - Patola Newest 'ffmpeg' Questions - Stack Overflow
  I use this command to remove the green screen and overlay another video as background. However, green screen removal leaves green pixels all around a stick figure carton character. My video is a cartoon so there are no lighting issues. Is there a way to improve this behavior? ffmpeg -y -i looped.mp4 -i green.mp4 -filter_complex "amix;[1:v]chromakey=0x00FF00:0.18:0.01 [ckout];[0:v][ckout]overlay=eof_action=pass[out]" -map [out] output.mp4  (...) --

18 septembre

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

• 22:20
  writing jpg images from ffmpeg pipe - seandoucette Newest 'ffmpeg' Questions - Stack Overflow
  Using php to read an rtsp stream from an ffmpeg command utilizing image2pipe, I'm finding the images are truncated in some manner and only display a partial image. My task is to write unique jpg filenames at 30fps. Below is the php code. I've simplified the filename structure in this example for clarity. The script performs as expected with no obvious errors writing out 30fps consistently. I can't figure out what extraneous or missing information in the content is causing the output images to appear corrupt. $cmd = "ffmpeg -rtsp_transport tcp -framerate 30 -i (...)
• 22:45
  Frame duration issues when trimming videos in MATLAB/ffmpeg? - twilightecologist Newest 'ffmpeg' Questions - Stack Overflow
  I have two videos (A.MOV and B.MOV), that are supposed to be perfectly synced. However, Video A (3708 frames), has 5 more frames than Video B (3703 frames). When I look at the timestamps of these frames, the extra A frames are at the very end of the video. In addition, the last frame in each video is a "padded" frame, with a duration much longer (around 10 times) than that of the other frames. I need my videos to be perfectly synced, with the same frame number. Since the extra frames are at the end of the video, I want to trim off the extra frames in A, as well as trim the "padded" (...)
• 22:49
  Video streaming error: Uncaught (in promise) NotSupportedError: Failed to load because no supported source was found - Aizen Newest 'ffmpeg' Questions - Stack Overflow
  Here is my problem: I have one video src 1080p (on the frontend). On the frontend, I send this video-route to the backend: const req = async()=>tryconst res = await axios.get('/catalog/item',params:SeriesName:seriesName);return data:res.data;catch(err)console.log(err);return false;const fetchedData = await req();-On the backend i return seriesName.Now i can make a full path,what the video is,and where it is,code: const videoUrl = 'C:/Users/arMori/Desktop/RedditClone/reddit/public/videos';console.log('IT VideoURL',videoUrl); const (...)
• 19:23
  Facing issues with adding text over a video as watermark using ffmpeg in Laravel - Kelash Newest 'ffmpeg' Questions - Stack Overflow
  I am facing issues with adding text over a video as a watermark using pbmedia/laravel-ffmpeg. Where am I going wrong? Code: $format = new X264(); $format->setAudioCodec('aac'); $format->setVideoCodec('libx264'); $format->setKiloBitrate(0); $localPath = '/' . $this->video->id . '.mp4'; $ffmpeg = FFMpeg::fromDisk("public") ->open($localPath) ->addFilter(function ($filters)  (...)
• 19:03
  How to record video and audio from webcam using ffmpeg on Windows? - Babu Newest 'ffmpeg' Questions - Stack Overflow
  I want to record video as well as audio from webcam using ffmpeg, I have used the following codes to know what devices are available: ffmpeg -list_devices true -f dshow -i dummy And got the result: ffmpeg version N-54082-g96b33dd Copyright (c) 2000-2013 the FFmpeg developers built on Jun 17 2013 02:05:16 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray (...)
• 07:20
  Multiple live video outputs advice. Live stream/Record/Preview, FFMPEG, Windows, Decklink [closed] - stroltz Newest 'ffmpeg' Questions - Stack Overflow
  I am looking for advice on how best to achieve multiple live video outputs. The live source is a Decklink card on Windows. (We have a ffmpeg build working to access the card) We want 4 outputs; We want to run a preview window (low quality would be preferred) just so the user can see the video is working. We want to be able to live stream - single bit rate, RTMP. (goes up to a CDN) Independent from the streaming we want to be able to stop and start recording to file. Ideally using CRF. So a separate encode – but maybe we use the RTMP encode, not sure, and (...) -- https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs
• 11:57
  h264 via WebRTC latency issue - Lucas Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to send a video stream encoded with h264 (hardware accelerated with nvidia encoder) via WebRTC for low latency display on a browser. More precisely, I have a thread that encodes an opengl framebuffer at a fixed frame rate, the resulting AVPacket's data (I encode using ffmpeg's C api) is then forwarded via WebRTC to the client (using aiortc) The problem is that I observe significant delays, that seem to depend on the frame rate I use. For example, running it locally, I get around 160ms delay when running at 30fps, and around 30ms when encoding at (...)
• 10:43
  FFmpeg - Change resolution of the video with aspect ratio - Arthur Newest 'ffmpeg' Questions - Stack Overflow
  all. How to change resolution of the video with aspect ratio with FFmpeg? There are options http://manpages.ubuntu.com/manpages/oneiric/man1/ffmpeg.1.html -s size Set frame size. The format is wxh (ffserver default = 160x128, ffmpeg default = same as source). The following abbreviations are recognized: and -aspect aspect Set the video display aspect ratio specified by aspect. aspect can be a floating point number string, or a string of the form num:den, where num and den are the numerator and (...) -- http://manpages.ubuntu.com/manpages/oneiric/man1/ffmpeg.1.html
• 06:46
  There is a problem with converting ffmpeg video from hev1 to hvc1 - sixawnstar Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -i in.mp4 -c:v copy -c:a copy -tag:v hvc1 out.mp4 I used ffmpeg to transcode the videos, but some of the transcoded videos were black screens with audio but no visuals. enter image description hereenter image description here By using ffmpeg -i video.mp4 to view the video information, it was found that the information for both videos is consistent. However, the screen in Figure 1 displays a black screen after transcoding, whereas Figure 2 functions normally after (...) -- enter image description here, enter image description here
• 07:58
  How to get language for embedded subtitles in video file using FFMPEG libraries - helgovic Newest 'ffmpeg' Questions - Stack Overflow
  I have seen lots of examples on how to get the language codes using the command line interface, but how do you get them using the libraries?
• 07:12
  How to extract a frame from an INSV format 360 video using Python - Kalpesh Shinde Newest 'ffmpeg' Questions - Stack Overflow
  I have a 360 video captured with an Insta360 X3, which is in the INSV format. I would like to extract a frame from this video using Python, FFmpeg, or any other suitable tool, without using Insta360 Studio to export the video to MP4 first. Here is what I have tried so far: FFmpeg: I attempted to use FFmpeg to directly convert the INSV file to images, but I encountered errors, possibly due to the proprietary nature of the INSV format. ffmpeg -i input.insv -vf "select=eq(n,0)" -q:v 3 output.jpg This command did not work as expected and produced an error. Python (...)
• 07:03
  react cant find ffmpegwasm - Martin Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a working example for ffmpeg wasm with react js in my browser. I have been following this very simple example: https://www.youtube.com/watch?v=-OTc0Ki7Sv0&ab_channel=Fireship installed ffmpeg locally inside my react repo node_modules as seen here: And followed to tutorial video to edit the App.jsx so it looks like this: import React, useState, useEffect from 'react'; import './App.css'; import createFFmpeg, fetchFile from 'ⓐffmpeg/ffmpeg'; const ffmpeg = createFFmpeg( log: (...) -- https://www.youtube.com/watch?v=-OTc0Ki7Sv0&ab_channel=Fireship,
• 08:01
  ServletOutputStream failed to flush: - Dawid Newest 'ffmpeg' Questions - Stack Overflow
  I try to convert m3u8 file to WebM using ffmpeg and stream it onto browser. I want it to play on browser without using any javascript. Stream video method: public void streamVideo(OutputStream os ) String url = "m3u8file.m3u8"; byte[] bytes = new byte[BUFFER]; int bytesRead = -1; ProcessBuilder pb = new ProcessBuilder( "ffmpeg", "-i", url, "-c:v", "libvpx-vp9", "-b:v", "1M", "-c:a", "libopus", "-b:a", "128k", "-f", "webm", "pipe:1" ); pb.redirectErrorStream(true); try (...)
• 04:12
  Get blur effect inside a drawn box using ass format - Armen Sanoyan Newest 'ffmpeg' Questions - Stack Overflow
  I have Nodejs application which generates subtitles file for video editing. The editing is done by ffmpeg. For each word I also generate a backdrop with rounded corners using drawing command. Example of dialog for backdrop. Dialogue: 0,00:00:38.60,00:00:42.10,Default,,0,0,0,,\\p1\\1a&HD8&\\c&HE27FA4&\\pos(341.07421875,517.5)\\an4 \\p1m 15 0 b 1202.8515625 .... \\p0 Now I want to make the backdrop blur. (Text backdrop by ass formatting) I have tried to use \\blur or \\be, but they are for other purpose. Below is reference from the doc Enable or disable a (...) -- drawing command, Enable or disable a subtle softening-effect for the edges of the text
• 05:38
  How to solve video is choppy when scrolling on android browser? - SiLeafClover Newest 'ffmpeg' Questions - Stack Overflow
  I am currently doing video scrolly kind of things. I'm using GSAP and Scrolltrigger and sveltekit to play video on scroll. At the beginning of the implementation, the video is very laggy on scroll on all browsers and cross devices. So I do some research and found out video encoding is so important and found this ffmpeg command through codepen. ffmpeg -i originalVideo.mp4 -movflags faststart -vcodec libx264 -crf 23 -g 1 -pix_fmt yuv420p output.mp4 When I use the video which is exported by the above command, it works smoothly on windows, mac and ios. But I'm still having (...)
• 03:57
  FFmpeg can successfully retrieve the RTSP stream, but it cannot print the time_base - 何西西 Newest 'ffmpeg' Questions - Stack Overflow
  I can successfully obtain the RTSP stream and use the av_dump_format function to print the stream information, but I cannot retrieve the time_base. Why is that? FFmpeg is version: n4.0.6 this is my code: int main(int argc, char *argv[]) struct timeval systemstart_time; struct timeval rtspfetch_time1; struct timeval rtspfetch_time2; AVFormatContext *pFormatCtx = NULL; AVPacket *av_packet = NULL; AVDictionary *options = NULL; gettimeofday(&systemstart_time, NULL); print_time_with_microseconds(systemstart_time);  (...)

17 septembre

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

• 12:47
  ffmpeg loosing audio after green screen overlay [closed] - Patola Newest 'ffmpeg' Questions - Stack Overflow
  I tried this command to overlay a background video with audio under a green screen vid. However, I keep on loosing audio. How do I keep the audio? also, green screen leaves some green at the edges behind. any idea how to optimize that? ffmpeg -i main-1.mp4 -i green.mp4 -filter_complex "[1:v]chromakey=0x00FF00:0.18:0.01 [ckout];[0:v][ckout]overlay=eof_action=pass[out]" -map [out] output.mp4
• 13:49
  Crackling sound when recording audio with ffmpeg - Victor Basso Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record from a microphone and webcam on MacOS with the following command: ffmpeg -f avfoundation -framerate 30 -i "0:0" ~/recorded.mp4 My result has crackling in the audio. I'm familiar with this problem when you use a DAW: you solve it by increasing the sample buffer. The idea is that audio samples coming from your interface/mic are not coming in a consistent or fast enough rate, so the missing samples being filled with zeroes causes the crackling sound. To avoid missing samples you want the recording software to wait longer for samples accumulating (...) -- DAW
• 08:36
  How to force AVCodecContext to release all references to any buffers - imikbox Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFMPEG to decode a video stream and I have implemented a custom functions for AVFrame memory allocation and de-allocation (by setting a custom function for codec_ctx->get_buffer2). So when an AVFrame requires new memory, I do the memory allocation and wrap an AvBufferRef around it using av_buffer_create. I also define my custom de-allocation function, so when the reference counted AvBufferRef is not required anymore, I do the memory clean up. This way I can log precisely when memory gets allocated and when a buffer becomes free. During video decoding I want to do a (...)
• 08:27
  Video streamign with FFMpeg and Nest.js+Next.js - Aizen Newest 'ffmpeg' Questions - Stack Overflow
  Here is my problem: I have one video src 1080p (on the frontend). On the frontend, I send this video-route to the backend: const req = async()=>tryconst res = await axios.get('/catalog/item',params:SeriesName:seriesName);return data:res.data;catch(err)console.log(err);return false;const fetchedData = await req();-On the backend i return seriesName.Now i can make a full path,what the video is,and where it is,code: const videoUrl = 'C:/Users/arMori/Desktop/RedditClone/reddit/public/videos';console.log('IT VideoURL',videoUrl); const (...)
• 08:17
  Running ffmpeg (WASM/NodeJS) on multiple input files in a React App - FlipFloop Newest 'ffmpeg' Questions - Stack Overflow
  I recently followed a tutorial by Fireship.io going over making a React App that enables a user to input a video file and convert it into a gif. Here is the source GitHub Repo. The packages used by the project are ⓐffmpeg/ffmpeg and ⓐffmpeg/core, which take care of converting the video into a GIF (although this can be changed to whatever, like the FFmpeg CLI tool). I wanted to take this a step further and make it possible for me to convert multiple videos at once, each into their own separate gif, however, I am having trouble running the next task when the first is (...) -- Fireship.io, GitHub Repo, documentation, ffmpeg wasm, example
• 07:46
  `free(): invalid next size (normal)` after loading some frames of some videos using ffmpeg libs - rakivo Newest 'ffmpeg' Questions - Stack Overflow
  here is the function: uint8_t *load_first_frame(const char *file_path, AVFrame **frame) int ret; AVFormatContext *format_ctx = NULL; if ((ret = avformat_open_input(&format_ctx, file_path, NULL, NULL)) < 0) eprintf("could not open input file\\n"); return NULL; if ((ret = avformat_find_stream_info(format_ctx, NULL)) < 0) eprintf("could not find stream info\\n"); avformat_close_input(&format_ctx); return NULL; int stream_idx = -1; for (unsigned int i = 0; i < format_ctx->nb_streams; (...)

16 septembre

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

• 13:33
  Generate MPEG-DASH segments when requested [closed] - John Smith Newest 'ffmpeg' Questions - Stack Overflow
  Up front disclaimer: this question is almost identical to the one here: Generate single MPEG-Dash segment with ffmpeg but it seems that ffmpeg has updated over time and now the answer provided by Coumeu is no longer accurate. Using ffmpeg, I am attempting to "lazily create" the segments needed for MPEG DASH playback. I have a static manifest (MPD) which includes SegmentTemplates for 1 video and 1 audio stream. Only when the endpoints provided in the SegmentTemplate for init or media segments is hit it will generate this segment. In other words, nothing is processed up (...)
• 16:59
  Python PyAV how to flush to disk regularly - Jojo71 Newest 'ffmpeg' Questions - Stack Overflow
  I am using PyAV for encoding a video stream from a camera and saving it to disk. This works in general, but I have one problem left: the file on the disk stays at 0kb regardless of how long i record. Onyl when I close the output_stream it saves to disk. Since I want to do hour long streams, I need to flush the stream regularly to disk. Also if my program crashes the file needs to be valid. Here is my code for the recorder class ,which I call with "test.mkv" as output file. class Recorder: def __init__(self) -> None: recorder_instances.append(self)  (...)
• 10:58
  how to resolve pixel jittering in javacv generated video - Vikram Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate video using images, where image have some overlays text and png icons. I am using javacv library for this. Final output video seems pixelated, i don't understand what is it since i do not have video processing domain knowledge, i am beginner to this. I know that video bitrate and choice of video encoder are important factor which contributes to video quality and there are many more factors too. I am providing you two output for comparison, one of them is generated using javacv and another one is from moviepy library Please watch it in full (...) -- https://imgur.com/a/aowNnKg, https://imgur.com/a/eiLXrbk

15 septembre

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

• 21:39
  Inserting clips into mp4 via ffmpeg - lfgan Newest 'ffmpeg' Questions - Stack Overflow
  I am looking to create mp4 files by combining multiple static mp4s and mp3s. I have a script already to convert mp3 to mp4 and using the album art as a static background image, and inserting the intro. What I am having problems with is that it cannot concatenate the videos reliably, or at all for that matter. This is the code that I currently have, it is ChatGPT, however I gave up as it seemed like it was just running in circles. setlocal :: Set variables set "mp3file=myfile.mp3" set "coverart=extracted_cover.jpg" set "outputfile=music.mp4" set (...)
• 16:25
  On the fly video conversion in django during upload - Illucious Newest 'ffmpeg' Questions - Stack Overflow
  I an making a backend in django rest where user will be uploading videos in multiple formats such as mp4, avi, etc. I want to convert these videos to a single h264 format while storing them but rather than first taking the full video and then converting it i want to convert it while it is being uploaded how can i do that. The video file is comming through multipart/form-data I have been stucck and not able to find a plausible approach but i know that i have to use FFMpeg in some (...)
• 16:52
  javacv and moviepy comparison for video generation - Vikram Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate video using images, where image have some overlays text and png icons. I am using javacv library for this. Final output video seems pixelated, i don't understand what is it since i do not have video processing domain knowledge, i am beginner to this. I know that video bitrate and choice of video encoder are important factor which contributes to video quality and there are many more factors too. I am providing you two output for comparison, one of them is generated using javacv and another one is from moviepy library Please watch it in full (...) -- https://imgur.com/a/aowNnKg, https://imgur.com/a/eiLXrbk
• 13:38
  php ffmpeg pipe multicast issue - cihan ranx Newest 'ffmpeg' Questions - Stack Overflow
  I have four video in my server. I want to display all of them same page but video tag url is a php page. Actually it is working. But when i tried to open new tab again index.php then display only 2 video. When waiting to long display all of them. Why i must to waiting and why server take long time to response? I have ubuntu 20.04 and 8gb ram. If you copy link and open it multiple tab same time you will see the issue. Video Link is: index.php index.php  (...) -- index.php
• 11:54
  How to feed frames one by one and grab decoded frames using LibAV? - Alvan Rahimli Newest 'ffmpeg' Questions - Stack Overflow
  I am integrating a third party system where I send a TCP packet to ask e.g. 5 frames from a live CCTV camera stream, and it sends those 5 frames one by one. Each package is h264 encoded frame, wrapped with some relevant data. I need to write a code using Libav where I can: Feed the frames one by one using AVIOContext (or smth similar). Grab decoded frame. Draw that to a window (Not relevant to the question, writing for context). I've been doing the same with GStreamer by creating a pipeline like this: AppSrc -> H264Parser -> H264Decoder -> (...)
• 11:39
  How to feed frames one by one and grab decoded frames using LibAV? - Alvan Rahimli Newest 'ffmpeg' Questions - Stack Overflow
  I am integrating a third party system where I send a TCP packet to ask e.g. 5 frames from a live CCTV camera stream, and it sends those 5 frames one by one. Each package is h264 encoded frame, wrapped with some relevant data. I need to write a code using Libav where I can: Feed the frames one by one using AVIOContext (or smth similar). Grab decoded frame. Draw that to a window (Not relevant to the question, writing for context). I've been doing the same with GStreamer by creating a pipeline like this: AppSrc -> H264Parser -> H264Decoder -> (...)
• 10:21
  ffmpeg with cuda and concat videos [closed] - Petr Šimůnek Newest 'ffmpeg' Questions - Stack Overflow
  I have a ffmpeg command with nvidia hw support that I want to join two videos: /home/videotest/ffmpeg-dev/ffmpeg -benchmark -hide_banner -loglevel warning -y -hwaccel_device 0 -hwaccel cuda -hwaccel_output_format cuda -i /mnt/video-storage/test/cuda/surfing/intermediate1.mp4 -i /mnt/video-storage/test/cuda/surfing/intermediate2. mp4 -filter_complex 'hwupload_cuda,[0:v:0][0:a:0][1:v:0][1:a:0]concat=n=2:v=1:a=1 [outv] [outa]' -map [outv] -map [outa] -pix_fmt yuv420p -c:v h264_nvenc -preset p6 -profile: v high -force_key_frames 'expr:gte(t,n_forced*5)' -bf 0 (...)
• 11:00
  Merge audio streams with ffmpeg in nodejs into one stream seamlessly? - Sefian Newest 'ffmpeg' Questions - Stack Overflow
  I've been working on a music bot for DnD which we are using as our main source of music in Discord. Discord is not important as it accepts pretty much any stream. What i want to achieve:I want to have one stream playing music, and i want to have one other stream, that can dynamically load mp3 files, that could be played briefly in the middly of the music files. So.. basically a soundboard. I've seen discord do this with their soundpad feature, where it can seamlessly incorporate audio into others mic audio. How can one achieve that? I've tried using (...)
• 08:09
  Transcoding/ Converting mpeg to h264 using ffmpeg h264_nvenc - Mustafa Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to transcode a video rendered by Davinci Resolve, using ffmpeg from mpeg4 to h264, on Ubuntu, using the following command. ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -i input.mov -c:a copy -c:v h264_nvenc -b:v 8M -preset 7 output-h264_nvenc-p7.mp4 -v verbose And my Nvidia card is NVIDIA GeForce GTX 1650. I'm gettting the following error: [mpeg4 ⓐ 0x55a893ed3200] Video width 3840 not within range from 48 to 2032 [mpeg4 ⓐ 0x55a893ed3200] Failed setup for format cuda: hwaccel initialisation returned error. And (...)

14 septembre

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

• 13:44
  How to reduce latency in WebRTC streaming with ffmpeg [closed] - Artem Newest 'ffmpeg' Questions - Stack Overflow
  I have a backend written in Go that captures the screen using ffmpeg and streams it to the frontend via WebRTC. The goal is to reduce the latency in the stream. For WebRTC, I'm using the pion library, and the H264 codec. The implementation is based on this example. I’m not including the ffmpeg command since the question is more about WebRTC. Based on the logs, ffmpeg starts sending data fairly quickly (within half a second), and these bytes are sent to WebRTC immediately. However, the video does not start playing right away. I added some debug messages, and I can see that (...) -- pion, example
• 20:02
  how to generate video thumbnail in node.js? - paynestrike Newest 'ffmpeg' Questions - Stack Overflow
  I am building an app with node.js, I successfully uploaded the video, but I need to generate a video thumbnail for it. Currently I use node exec to execute a system command of ffmpeg to make the thumbnail. exec("C:/ffmpeg/bin/ffmpeg -i Video/" + Name + " -ss 00:01:00.00 -r 1 -an -vframes 1 -f mjpeg Video/" + Name + ".jpg") This code is coming from a tutorial from http://net.tutsplus.com/tutorials/javascript-ajax/how-to-create-a-resumable-video-uploade-in-node-js/ the code above did generate a jpg file but it's not a thumbnail but (...) -- http://net.tutsplus.com/tutorials/javascript-ajax/how-to-create-a-resumable-video-uploade-in-node-js/
• 14:26
  Text backdrop by ass formatting - Armen Sanoyan Newest 'ffmpeg' Questions - Stack Overflow
  I want to add box behind a word using ass subtitles formatting. The box should have border radius. the ass file later will be used by ffmpeg. I have tried the BorderStyle=3 form stack ansers 1, 2 both of them do not provide a way to get rounded boxes. Also the BorderStyle=4 didn't work for me. In comments of last stack answer I found a possible reason that my libraries can be old, but anyway it doesn't seem that BorderStyle=4 will solve my problem of border radius. There is another way to achieve rounded box link to answer. I didn't figure it out how to install all the (...)
• 14:20
  How to extract the 1st frame and restore as an image with ffmpeg? - lex Newest 'ffmpeg' Questions - Stack Overflow
  Anyone knows the trick? And how to install ffmpeg ? yum install mpeg only returns this: ======================================================================================== Matched: mpeg ======================================================================================== libiec61883.i386 : Streaming library for IEEE1394 libiec61883.x86_64 : Streaming library for IEEE1394 qffmpeg-devel.i386 : Development package for qffmpeg qffmpeg-devel.x86_64 : Development package for qffmpeg qffmpeg-libs.i386 : Libraries for qffmpeg qffmpeg-libs.x86_64 (...)
• 07:52
  How to concatenate two MP4 files using FFmpeg? [closed] - Mark L Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to concatenate two mp4 files using ffmpeg. I need this to be an automatic process hence why I chose ffmpeg. I'm converting the two files into .ts files and then concatenating them and then trying to encode that concatenated .ts file. The files are h264 and aac encoded and I'm hoping to keep the quality the same or as close to original as possible. ffmpeg -i part1.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part1.ts ffmpeg -i part2.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part2.ts cat part1.ts part2.ts > parts.ts ffmpeg -y -i (...)
• 06:27
  ffmpeg error while converting flv video to mp4 [closed] - Giorgos Betsos Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert flv video to mp4 using ffmpeg. Command I executed: ffmpeg -i input.flv -c:v libx264 output.mp4 I get below error: [flv ⓐ 0xaaab0f4ec060] Packet mismatch 1703445535 198421 198574 [flv ⓐ0xaaab0f4ec060] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, flv, from 'input.flv': Duration: 00:00:07.12, start: 0.000000, bitrate: 16070 kb/s (...) -- FLV-Media-Player
• 07:11
  How to Record Video of a Dynamic Div Containing Multiple Media Elements in React Konva? - Humayoun Saeed Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a React application where I need to record a video of a specific div with the class name "layout." This div contains multiple media elements (such as images and videos) that are dynamically rendered inside divisions. I've tried several approaches, including using MediaRecorder, canvas-based recording with html2canvas, RecordRTC, and even ffmpeg, but none seem to capture the entire div along with its dynamic content effectively. What would be the best approach to achieve this? How can I record a video of this dynamically rendered div including all its media (...)