14 May

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

• 05:38
  How to merge several videos in a grid, in one video? [closed] - Kayra Uckilinc Newest 'ffmpeg' Questions - Stack Overflow
  I have 36 video files with same dimensions and want to concatenate them into a one single video with 6x6 grid. Ideally is non-square number of videos are given for example 12, a 4x3 grid as the most square it can be would be great. I tried with matplotlib's animation library but failed to concatenate videos in both directions first as row then as columns. Any help is appriciated!
• 04:47
  Converted video is getting blur in FFMpeg - Maneesh Rao Newest 'ffmpeg' Questions - Stack Overflow
  I have a video and converted to mp4 format. I am using FFMpeg to convert the video. Video conversion is successfully done but video is getting blur. any Help? $fileName = "convertedVideoFile.mp4"; $mp4File = "oldVideoFile.mp4"; $format = new X264('aac', 'libx264'); // create object $ffmpeg = FFMpeg::create([ 'ffmpeg.binaries' => exec('which ffmpeg'), 'ffprobe.binaries' => exec('which ffprobe'), 'timeout' => 3600, // The timeout for the underlying process  (...)
• 02:03
  How to add watermark to video in Flutter using Flutter_ffmpeg - user433575 Newest 'ffmpeg' Questions - Stack Overflow
  I cannot figure out why my ffmpeg commands aren't working... Future watermark(filePath, width, height) async final String outPath = 'watermarked.mp4'; final String inputVideo = await rootBundle.loadString('assets/ffmpeg/demo.mov'); final String inputWatermark = await rootBundle .loadString('assets/ffmpeg/video_overlay.png'); final arguments = '-i $inputVideo -i $inputWatermark -filter_complex overlay=10:10 -codec:a copy $outPath'; final int rc = await (...)
• 01:44
  Kill child process only after readFile() Node js Electron - Radespy Newest 'ffmpeg' Questions - Stack Overflow
  I'm using an imported ffmpeg binary ffmpeg-static-electronin an Electron-React app (on Windows Pro 10) and want to delete a saved cropped video and then kill the child process afterwards from my Main process. The overall aim is to crop a video of the whole screen following capture and then send the cropped video to a renderer. const fsPromises = require('fs').promises const ffmpeg = require('ffmpeg-static-electron') const execFile = require("child_process") ipcMain.on("windoze_capture_screen:video_buffer", async (event, buffer) => (...)
• 01:42
  ffmpeg IP camera unable to record - trycatch22 Newest 'ffmpeg' Questions - Stack Overflow
  I am using an Amcrest POE camera. I have assigned it a static IP which I am able to confirm by logging into it via the browser. Its IP is 192.168.1.200. I tried following the instructions in this link but couldn't get it to work. I get: http://admin:adminⓐ192.168.1.200/dd-a End of file The official ffmpeg documentation does not talk about -segment_time or -segment_format. What is the ffmepg command to grab a stream for a fixed duration and write it to an .mp4 (...)
• 02:38
  offloading to ffmpeg via named pipes in c#/dotnet core - bep Newest 'ffmpeg' Questions - Stack Overflow
  I tried to break this down to the base elements so I hope this is clear. I want to take in a network stream, it may be a 1 way, it may be a protocol that requires 2 way communication, such as RTMP during handshake. I want to pass that stream straight through to a spawned FFMPEG process. I then want to capture the output of FFMPEG, in this example I just want to pipe it out to a file. The file is not my end goal, but for simplicity if I can get that far I think I'll be ok. I want the code to be as plain as possible and offload the core processing to FFMPEG. If I ask FFMPEG (...)

13 May

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

• 09:04
  lavfi/dnn_backend_native_layer_avgpool.h: Documentation - Shubhanshu Saxena git.videolan.org Git - ffmpeg.git/rss log
  lavfi/dnn_backend_native_layer_avgpool.h: Documentation Add documentation for Average Pool Layer Signed-off-by: Shubhanshu Saxena <shubhanshu.e01ⓐgmail.com> [DH] libavfilter/dnn/dnn_backend_native_layer_avgpool.h

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

• 23:23
  Timestamp not printed on thumbnails with FFMPEG - mlatelcom Newest 'ffmpeg' Questions - Stack Overflow
  I have a script using FFMPEG to generate an image with tiled thumbnails every 45 seconds for several videos on a given folder. The images are named with the name of the video it was generated from. It generates the thumbnails for each video but it does not print the time stamps on them. The path to the font file is correct; so I don't know where the issue is. I'm using the script in Fedora Linux. Here is the FFMPEG command line code on the script: ffmpeg -ss 00:00:05 -i test.mp4 -loglevel 40 -frames 1 -bt 20M -vf (...)
• 22:03
  Creating an adaptive HLS stream from MP4 files with multiple bitrates without re-encoding - user15180344 Newest 'ffmpeg' Questions - Stack Overflow
  I have an MP4 video already encoded to multiple resolutions/bitrates in separate file for each quality. I'd like to package it into HLS adaptive streaming without re-encoding. I know I can use the following command to get a single bitrate HLS: $ ffmpeg -i input.mp4 -codec: copy -start_number 0 -hls_time 10 -hls_list_size 0 -f hls output.m3u8 However I can't find a way to do the same for multiple video files (the same video in different resolutions), combining the whole output in a master playlist. All the examples I have found that produce a multibitrate/adaptive (...)

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

• 22:06
  avformat/utils: Fix NPD when allocating AVStreamInternal fails - Andreas Rheinhardt git.videolan.org Git - ffmpeg.git/rss log
  avformat/utils: Fix NPD when allocating AVStreamInternal fails Regression since b9c5fdf6027010d15ee90a43aa023e45a5189097; fixes Coverity ID #1484786. Also remove the check for st->internal->parser as av_parser_close(NULL) is a no-op. Reviewed-by: James Almer <jamrialⓐgmail.com> Reviewed-by: Marton Balint <cusⓐpasswd.hu> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardtⓐoutlook.com> [DH] libavformat/utils.c

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

• 20:49
  Why does FFmpeg not recognize this HEX color? - John Matley Newest 'ffmpeg' Questions - Stack Overflow
  I have a simple FFmpeg command (run from BAT file) which will overlay 2 bars of color onto a background image. The first color (FF0000) works great, but the second (212121) outputs a grey bar and not the HEX color I specified. Here's what I have so far: ffmpeg-y -i background.png -f lavfi -i color=ff0000:size=1280x720,format=rgba -f lavfi -i color=212121:size=1280x720,format=rgba -filter_complex "[1:v]rotate=-30*PI/180:c=none:ow=rotw(iw):oh=roth(ih)[box];[0:v][box]overlay=500:200[corner];[corner][2:v]overlay=0:600[output]" -map "[output]" -frames:v 1 output.png Any (...)
• 20:28
  I want to use Xabe.FFmpeg to convert the video size, but I found that I may be stuck in a deadlock problem - HalfLucky Newest 'ffmpeg' Questions - Stack Overflow
  I now use WPF to develop the function of importing video. I want to add a code to convert the video size, but every time the program runs to this line of code, my program will deadlock here. public MyRelayCommand ImportMovieCmd => new Lazy>(() =>new MyRelayCommand(ImportMovie)).Value; private async void ImportMovie(string mediaType) string[] pathlist = ExecuteSelectFileDialog(mediaType); if (pathlist == null || pathlist.Length == 0) return; foreach (var path in pathlist) ... await (...)
• 20:27
  how to make cv2.videoCapture.read() faster? - Yu-Long Tsai Newest 'ffmpeg' Questions - Stack Overflow
  My question : I was working on my computer vision project. I use opencv(4.1.2) and python to implement it. I need a faster way to pass the reading frame into image processing on my Computer(Ubuntu 18.04 8 cores i7 3.00GHz Memory 32GB). the cv2.VideoCapture.read() read frame (frame size : 720x1280) will take about 120~140ms. which is too slow. my processing module take about 40ms per run. And we desire 25~30 FPS. here is my demo code so far: import cv2 from collections import deque from time import sleep, time import (...)
• 20:26
  FFMPEG dropping frames due to color space mismatch - Ismir Egal Newest 'ffmpeg' Questions - Stack Overflow
  I've got two png image sequences with 30 frames each i'm trying to blend together. The problem is that some of the images are in the rgb24 color space while some are in rgba. Blending the two 30-frame animations together causes it to loose frames - the output is only 26 frames long and the two individual strips out-of-synch. Command used: ffmpeg -i a_%04d.png -i b_%04d.png -c:v libvpx -crf 4 -b:v 20M -filter_complex "blend=average" ab.webm Result: Input #0, image2, from 'a_%04d.png': Duration: 00:00:01.20, start: 0.000000, bitrate: (...)
• 19:51
  Add coverart into ogg containing an opus audio stream with ffmpeg without re-encoding the audio stream - SebMa Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to add a coverart into an ogg file with ffmpeg : Here are my source.ogg and source.jpg files : $ ffprobe -hide_banner source.ogg Input #0, ogg, from 'source.ogg': Duration: 00:03:02.45, start: 0.007500, bitrate: 73 kb/s Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp Metadata: DURATION : 00:03:02.441000000 ENCODER : Lavf58.20.100 $ identify source.jpg source.jpg JPEG 480x360 480x360+0+0 8-bit DirectClass 15.1KB 0.000u 0:00.000 I tried this : $ ffmpeg -hide_banner -i (...)
• 18:49
  Object detection in video file (ffmpeg & tensorflow ?) - totolino Newest 'ffmpeg' Questions - Stack Overflow
  I would like to scan several video files for person in it. Best way would be with ffmpeg and something like tensorflow. tensorflow checks for persons in it, ffmpeg cuts the rest and the result is a video which only contains the frames with persons in it. Is there a way to do this?
• 17:40
  Not best results for [screen capture] streaming with ffmpeg js - Nikola Lukic Newest 'ffmpeg' Questions - Stack Overflow
  Platform: Windows 10 Ffmpeg version 4.4-full_build-www.gyan.dev This app works fine on macos. node websocket-relay.js supersecret 8081 8082 http-server --host=https://localhost --port 8080 ffmpeg -f gdigrab -i desktop -framerate 30 -video_size 640x480 -f mpegts -codec:v mpeg2video -s 640x480 -rtbufsize 100M -b:v 1000k -bf 0 http://localhost:8081/supersecret Logs: frame= 5515 fps= 20 q=31.0 size= 8302kB time=00:04:36.20 frame= 5526 fps= 20 q=31.0 size= 8317kB time=00:04:36.77 frame= 5537 fps= 20 q=31.0 size= 8331kB time=00:04:37.31 (...) --
• 16:45
  Bash: Create copy of music files in different format and folder - Brett Sjoholm Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a bash scipt to simply automate finding my flac files and creating an alac copy of them in a separate folder. Just so I have my little itunes folder. Want to automate because so many. So I find my flac folders within my Eminem folder.... :~$ find /mnt/music/Eminem -type d -name *FLAC /mnt/music/Eminem/2009 Relapse FLAC /mnt/music/Eminem/1996 Infinite FLAC /mnt/music/Eminem/1999 The Slim Shady LP FLAC /mnt/music/Eminem/2000 Marshall Mathers LP FLAC Now instead of going into each folder and converting manually using something (...)
• 15:49
  Is it possible to stream 2 vertically stacked videos with FFPlay? - Reino Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to open a remote lecture video (mp4[h264+aac]) accompanied by several slides (jpg) with ffplay where I would like to vertically stack both streams. Downloading with ffmpeg is no problem: ffmpeg -i \\ -loop 1 -i "https://.../slide_0001.jpg" \\ ... -loop 1 -i "https://.../slide_0054.jpg" \\ -lavfi " [1:v]trim=duration=10.000[img1]; ... [54:v]trim=duration=30.500[img54]; [img1][...][img54]concat=n=54, crop=1454:818:224:27, scale=w=640:h=360:flags=spline, fps=25[slides]; [slides][0:v]vstack " -c:v ... (...)

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

• 15:35
  doc/filters: correct name for guided filter - Gyan Doshi git.videolan.org Git - ffmpeg.git/rss log
  doc/filters: correct name for guided filter Note input requirements and reword option sub description. [DH] doc/filters.texi
• 14:17
  Revert "avcodec/adpcm: Set vqa_version before use in init" - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  Revert "avcodec/adpcm: Set vqa_version before use in init" Redundant with ff946633a30e15415974c3f0ec7751c04eb91701. Found-by: Andreas Rheinhardt <andreas.rheinhardtⓐoutlook.com> This reverts commit 7a403da0cb8e5fe308fe307b7ed219110f7021e0. [DH] libavcodec/adpcm.c

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

• 15:02
  Convolv multi-channel IR with mono audio using commandline (sox, ffmpeg, etc.) - David Healey Newest 'ffmpeg' Questions - Stack Overflow
  How can I apply a multichannel impulse response to a mono audio file with the resulting audio file being stereo? I'd like to do this from the commandline.
• 14:44
  develop with ffmpeg link failed [duplicate] - Turing Zhu Newest 'ffmpeg' Questions - Stack Overflow
  I write to test ffmpeg and call ffmpeg function, but it alwasy tell me link err: can not found ffmpeg function: this is my code: #ifdef __STDC_CONSTANT_MACROS #define __STDC_CONSTANT_MACROS #endif #ifndef INT64_C #define INT64_C(c) (c ## LL) #define UINT64_C(c) (c ## ULL) #endif #include #include #include #include static const char *src_filename = NULL; static const char *video_dst_filename = NULL; static const char *audio_dst_filename = NULL; static AVFormatContext *fmt_ctx = NULL; int main(int argc, char **argv) (...)
• 13:43
  No ffmpeg exe could be found. | Kivy - Mr. Anonymous Newest 'ffmpeg' Questions - Stack Overflow
  I made a YouTube Video Downloader with kivy. It should download the video with pytube and extract the audio with moviepy. But when I ran the apk, I get the error that no ffmpeg exe could be found. Did i forgot to include something in the requirements? Here is the python code without the kivy-ui: import moviepy.editor as mp my_clip = mp.VideoFileClip(path_to_video) my_clip.audio.write_auduofile("Test.mp3") Requirements from spec (...)
• 13:11
  how to make this ffmpeg concat better or fast? - JohnTerry Newest 'ffmpeg' Questions - Stack Overflow
  I am using this command to concat video urls and producing output video as .webm but it is very slow how do i make this faster ? command is - cmd = "ffmpeg -safe 0 -f concat -protocol_whitelist file,http,https,tcp,tls,crypto -segment_time_metadata 1 -i -vf select=concatdec_select,scale=: -af aselect=concatdec_select,aresample=async=1 -c:v libvpx-vp9 -crf 30 -b:v 0 -b:a 128k -c:a libopus ".format(text_file_path, width, height, output_video_path)
• 11:39
  (FFmpeg) VP9 Vaapi encoding to a .mp4 or .webm container from given official ffmpeg example - User800222 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to implement vp9 hardware acceleration encoding process. I followed ffmpeg offical github's example (Here -> vaapi_encode.c). But given example only save a .yuv file to .h264 file, I would like to save the frames to either .mp4 or .webm container. And having the ability to control the quality, and etc. I'm not reading frames from a file, I'm collecting frames from a live feed. When having full 5 secs of frames from the live feed, encode those frames using vp9_vaapi to a 5 secs .mp4 file. I'm able to save all the 5 secs (...) -- Here -> vaapi_encode.c, , ,
• 10:06
  Different between fragmented mp4 files generated by ffmpeg and by code - dinhnguyen Newest 'ffmpeg' Questions - Stack Overflow
  Currently I have a problem when generating fragmented MP4 file from code using libavformat. My file can be played using VLC, but can't be streamed (via WebSocket) and played (via MediaSource) in (Chrome) browser. (I used this to test streaming fragmented MP4 file to browser via WebSocket). Note: The files below is encoded by Baseline profile, level 4. So you should change the MIME type (in index.html) to const mimeCodec = 'video/mp4; codecs="avc1.42C028"'; to be able to play them. I checked and found that my generated Mp4 file is a bit different with the (...) -- this, file, fragmented MP4 file, fragmented Mp4 file by using libavformat
• 08:36
  Image generated by System.Drawing.Image is 10x larger than original file - Ninbura Newest 'ffmpeg' Questions - Stack Overflow
  I've written a Powershell script that extracts one frame from a dshow capture device using FFmpeg, and then copies the output image from a file to my clipboard: $screenshot = [System.Drawing.Image]::FromFile((Get-Item -Path $outputFilePath)) [System.Windows.Forms.Clipboard]::SetImage($screenshot) $screenshot.Dispose() The original file is a 1MB JPEG, but the image in my clipboard is an 11MB PNG. When I go to paste this file into something like Discord the file size is too large, unless you have Discord Nitro. Is there any way to avoid this file size (...)
• 06:18
  Restreaming HLS video source to RTMP using ffmpeg.autogen - Andrew Wilcockson Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write a C# restreaming class that will take HLS/m3u8 H264 encoded video streams and restream them as RTMP H264 encoded video. I started with the simple transport stream recorder sample and was able to make it work in the following scenarios: UDP restreamed to UDP (mpegts) UDP restreamed to RTMP (flv) HLS restreamed to UDP (mpegts) But cannot for the life of me get it to work with HLS to RTMP. I get a failure return code of -22 on my call to avformat_write_header Note that I can make this work perfectly from the command line version of ffmpeg with (...)
• 05:44
  Why Yuv data readed from ffmpeg is different from original input yuv? - sianyi Huang Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to make HDR test video, my approach is write a image, converting the image to yuv420p and then use ffmpeg to make the HDR test video. But I found the yuv data readed from mp4 is different from the original input.. I was stucked in here for a while, does anyone know how to read the correct yuv data from mp4 ? #ffmpeg encode command ffmpeg_encode_mp4 = \\ "ffmpeg -y -s 100*100 -pix_fmt yuv420p -threads 4 -r 1 -stream_loop -1 -f rawvideo -i write_yuv.yuv -vf \\ scale=out_h_chr_pos=0:out_v_chr_pos=0,format=yuv420p10le \\ -c:v libx265 -tag:v (...)
• 05:43
  Transcoding HEVC 4K HDR using ffmpeg and vaapi - P. Brand Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to transcode a 4K HEVC HDR video to a lower bitrate using ffmpeg and VAAPI hardware acceleration for my LG OLED television. I use the following file: Video Using the following command: ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -hwaccel_device va -filter_hw_device va -i LG\\ 4K\\ HDR\\ Demo\\ -\\ Daylight.mkv -map 0:0 -t 00:00:20 -c:v hevc_vaapi -sei hdr -qp:v 21 lg_vaapi.mkv But this file is not recognized as HDR on my TV. When using the libx265 encoder (which is off (...) -- Video, Patch
• 05:37
  Encode HDR content with ffmpeg directly into AV1 - Felixkruemel Newest 'ffmpeg' Questions - Stack Overflow
  I want to encode a short HDR clip from HEVC to AV1 while retaining all HDR informations. My goal is to use libsvtav1 as encoder. What do I need to specify to retain HDR? My current command looks like this, but I know that there's something missing: ffmpeg -i input-hdr.mkv -vcodec libsvtav1 -rc 0 -qp 23 -preset 5 -acodec copy -scodec copy -pix_fmt yuv420p10le output.mkv
• 05:30
  Why does ffmpeg have to align to the power of 2 when processing crop_left? - hansionz Newest 'ffmpeg' Questions - Stack Overflow
  If performance is considered, why doesn't crop_top \\ crop_left \\ crop_right perform power-of-two alignment? enter image description here -- enter image description here
• 04:40
  Convert Webp to MP4 file in Python Script [duplicate] - Sar sinua Newest 'ffmpeg' Questions - Stack Overflow
  is there any way to convert Webp file to MP4 in python script?i want to execute my codes on Heroku i tried... import moviepy.editor as mp clip = mp.VideoFileClip("input.webp") clip.write_videofile("output.mp4") i got error: OSError: MoviePy error: failed to read the duration of file giphy.webp. Here are the file infos returned by ffmpeg: ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.2.1 (GCC) 20200122 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls (...)
• 01:48
  When using ffplay, how to eliminate milliseconds from timestamp display in the video-filter - Dave Newest 'ffmpeg' Questions - Stack Overflow
  So when specifying a video-filter to display current video-time in 'hms' layout, the filter appends a millisecond value after the seconds-field. I want to eliminate the milliseconds portion. So far, my invoked cmd looks like: ffplay myfile.mp4 -vf "drawtext=text='%pts \\: hms':fontsize=20:fontcolor=white: box=1: boxcolor=black" i.e. instead of: 00:00:01.001 I want just 00:00:01 to display. [One might have thought that there would exist an 'hmsm' for the former, and that 'hms' would be the latter, but it just (...)
• 01:12
  FFMPEG Python - Convert Webp to MP4 file from Python Script - Sar sinua Newest 'ffmpeg' Questions - Stack Overflow
  is there any way to convert Webp file to MP4 in python script? i also know for running FFMPEG in python i should use below code import subprocess subprocess.call('ffmpeg.....',shell=True)