3 August

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

• 17:26
  Condition to check if a command printed something to stdout - Jesse Hix Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a loop that will return pass or fail if something is printed to stdout using the command below. The command will print info to the screen if a video has audio and it will print nothing if it doesn't. Currently the loop only prints pass on both the audio and non audio files. Is there a way to set the condition to stdout and determine if something was printed? ffprobe -i INPUT -show_streams -select_streams a -loglevel error >/dev/null if [ $? == 0 ] then echo pass else echo (...)
• 17:17
  ffmpeg best parameteres for fastest compression on FullHD mp4? - Mike Azatov Newest 'ffmpeg' Questions - Stack Overflow
  I need to compress a bunch of FullHD(1920x1080, 3Gb, mp4) videos, each ~2 hrs long. Some loss of quality is okay as is the lower resolution. I'm shooting for a 500Mb output video in ~10 min processing time (2080TI Ryzen 9 3900X). It is important for the videos to be completely in sync, so frame x in the input video matches frame x in output. For this, I'm using -vsync 0 My current working settings which get me to ~500MB size in 20 minutes. ffmpeg -i input_fullhd.mp4 -vcodec libx265 -crf 28 -vsync 0 -vf scale=800:-1 -preset medium output.mp4 I'd like it to be (...)
• 17:15
  wmv video; packet fragment position invalid; what does it mean and how to resolve it - gufidown Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to do some work on a wmv video file. I'm using ffmpeg and ffprobe. I'm getting the message: "packet fragment position invalid 0,0 not in 0". I am not familiar with video processing, quite a newbie actually. I didn't find an explanation what this exactly means and no hints on how to possibly resolve that problem. I am able to play the video using VLC media player as well as other players.
• 17:11
  FFmpeg takes too much time for generating m3u8 files from a mp4 file (166MB) - Angele Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg in nodejs to generate 4 different resolutions (360p, 480p, 720p, 1080p). I use a AWS lambda for each resolution and the last two take too much time. I convert a mp4 file which has a size of 166MB into .ts files (with all segments associated) It takes more than 900 seconds, and that's above the limit for a lambda timeout. Also my goal is to encode mp4 videos of a maximum size of 4go... and it would be to encode within 900 seconds maximum for each resolution. I used this website to find some parameters: (...) -- https://docs.peer5.com/guides/production-ready-hls-vod/

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

• 07:05
  avcodec/dnxhddec: check and propagate function return value - maryam ebr git.videolan.org Git - ffmpeg.git/rss log
  avcodec/dnxhddec: check and propagate function return value Similar to CVE-2013-0868, here return value check for 'init_vlc' is needed. crafted DNxHD data can cause unspecified impact. Reviewed-by: Paul B Mahol <onemdaⓐgmail.com> Signed-off-by: James Almer <jamrialⓐgmail.com> [DH] libavcodec/dnxhddec.c

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

• 15:57
  How to decrypt segmented parts .ts files which are encrypted with ffmpeg? - Yancey Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to generate encrypted m3u8 playlists, both generation and playing work perfectly. The statement I use to generate m3u8: ffmpg -i "source.mp4" -c:v h264_nvenc -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 10 -hls_playlist_type vod -hls_key_info_file "d:\\enc.keyinfo" -hls_segment_filename "output_$03d.ts" "output.m3u8"; Content of d:\\enc.keyinfo: /enc.key d:\\enc.key 261daad184c6acf4a3a21393ds232e1a Now I need to decrypt one or more generated .ts segments (not the whole m3u8 playlist), what should I (...)
• 15:43
  ffmpeg: nvidia gpu performance sub-optimal - david furst Newest 'ffmpeg' Questions - Stack Overflow
  the problem seems fairly basic : i'd like to create thumbnails from incoming video in the shortest time possible, and i'm trying to do this by offloading processing to an nvidia gpu. while i run ffmpeg, i'm monitoring the gpu usage with the nvidia-smi utility. gpu usage never goes above 15% and the amount of time to encode the thumbnails with gpu is only 10% less than the time required without the gpu. these performance levels are very disappointing. my question : am i going about this the wrong way (and if so, how should i go about it), or is this gpu performance (...) -- nvidia transcoding guide
• 12:55
  Python - why do I get this ffprobe error? - gasper101 Newest 'ffmpeg' Questions - Stack Overflow
  I am on mac and am working on a project in which my program shoud convert a .mp3 file into a .wav file and than get text from that file (basic speech recognition). For converting a .mp3 file into a .wav file I am using ffmpeg library. I have installed both ffmpeg and ffprobe libraryies using pip and than using homebrew so I have them installed in a folder. This is my code: import speech_recognition from pydub import AudioSegment from os import path #get text from original voice file------------------------------------------------- sound = (...)
• 12:33
  Batch mixing audio, given timestamps. Multiple offsets, only two sounds. How to do it efficiently? - Evil Newest 'ffmpeg' Questions - Stack Overflow
  I have two stereo sounds, 1.wav and 2.wav, these sounds are less than 1 second long and list of timestamps (miliseconds from start of recording). Recording of pure video (recording.mp4) is several hours long and there are thousands (20 000 - 30 000) of timestamps per sounds. I want to convert list of timestamps and sounds into one recording, merging it with video. The part of merging audio with video is easy with ffmpeg, so this is not part of the question. The list of timestamps is tsv, for example: 1201\\t1.wav 1501\\t2.wav 1603\\t1.wav and so on, up to 50 (...)
• 10:29
  Does LSB steganography permanently change the pixels of the image? - Jesse Hix Newest 'ffmpeg' Questions - Stack Overflow
  When you encrypt an image using LSB steganography it alters a few of the pixels. My question is if say you input that image in a video using ffmpeg and re-encode the video plus the image will the pixels still be altered and be able to be decrypted or not?
• 09:37
  Conversion of individual mp4 files to ts yields unexpected playback - MorenoGentili Newest 'ffmpeg' Questions - Stack Overflow
  I'm converting three mp4 files (h264, no audio, each with a duration of three seconds) to the mpeg-ts format like so. ffmpeg -i 1.mp4 -c copy 1.ts ffmpeg -i 2.mp4 -c copy 2.ts ffmpeg -i 3.mp4 -c copy 3.ts Please note: I can't combine the mp4 files beforehand. Each one has to be converted individually as shown above since they're being generated by a live recorder. Then, I manually created a .m3u8 manifest like this one, so I could play those 3 ts files in (...) -- link to the three files and the manifest
• 08:31
  Audio file could not be read as PCM WAV, AIFF/AIFF-C, or Native FLAC; check if file is corrupted or in another format - 陳昱廷 Newest 'ffmpeg' Questions - Stack Overflow
  import os import speech_recognition as sr command = "ffmpeg -i videototext.mp4 videototext.mp3" os.system(command) commandwav = "ffmpeg -i videototext.mp3 videototext.wav" os.system(commandwav) AUDIO_FILE = "videototext.wav" r = sr.Recognizer() videototext = sr.AudioFile(AUDIO_FILE) with videototext as source: audio = r.record(source, duration=100) print(type(audio)) print(r.recognize_google(audio)) above is my code,then the error is: Audio file could not be read as PCM WAV, AIFF/AIFF-C, or (...)
• 08:14
  cover image not adding to mp3 using ffmpeg - Rajkumar Maity Newest 'ffmpeg' Questions - Stack Overflow
  The cover image is not adding to the mp3 file Here is my code : shell_exec("ffmpeg -y -i ./tmp/tmp -i ./cover.jpg -map 0:0 -map 1:0 -metadata title=" . escapeshellarg($title) . " -metadata artist='Tuneraja.com' -metadata album='' -metadata year='' -metadata publisher='Tuneraja.com' -metadata copyright='respected owner' -vn -ar 44100 -ac 2 -b:a 64k -filter:a 'volume=1.0' ./tmp/" . escapeshellarg($fileTitle) . ".mp3 2>&1"); create_mp3($title, $duration, 0, "./tmp/$fileTitle.mp3", (...)
• 02:10
  When downloading HLS video with FFMPEG it does not download the audio - Thiago Franklin Newest 'ffmpeg' Questions - Stack Overflow
  I have a problem, when I try to download an HLS video with FFMPEG, it downloads the video track, but it doesn't find the AUDIO. When running the HLS .m3u8 file in a player, it plays normally, audio and video, but when trying to download, it shows an error message saying that the audio cannot be found. I'm running the following command: ffmpeg.exe -i "https://teste-etv.espiritismo.tv/437602.m3u8" -codec:a libmp3lame -b:a 96k teste-hls.mp3 Displays the following error when trying to download the audio: [hls ⓐ 0000021b5d9ad940] Skip (...)
• 00:13
  FFMPEG wrapping live h264 to mp4 container delay - Emil Borconi Newest 'ffmpeg' Questions - Stack Overflow
  Sorry if this has been asked but I couldn't find the answer. I'm trying to wrap a live raw h264 stream to a fragmented MP4 container. This is working as expected, with one issue, I have a 5-10 seconds delay between the input and output. Basically the output start after 5-10 seconds of the first input received. This is my command: ffmpeg -r 30 -f h264 -i tcp://127.0.0.1:1234 -c:v copy -an -f mp4 -movflags separate_moof+empty_moov+default_base_moof -tune zerolatency -tcp_nodelay true -frag_duration 33000 -max_muxing_queue_size 1 (...)

2 August

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

• 17:48
  How to configure FFmpeg in windows? [closed] - GrassWarlock Newest 'ffmpeg' Questions - Stack Overflow
  Hey there i'm not very tech savvy. when i invoke this command: ffmpeg -i input.mp4 -i subtitles.srt -map 0 -map 1 -c copy -c:v libx264 -crf 23 -preset veryfast output.mp4 ( which is supposed to overlay 'input.mp4' with subtitles from 'subtitle.srt' ) i get the following output: ffmpeg version 2021-07-27-git-0068b3d0f0-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers built with gcc 10.3.0 (Rev5, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads (...)
• 23:15
  extract date and LUFS from a file with script - sJoss Newest 'ffmpeg' Questions - Stack Overflow
  I am using for i in *.mp4; do echo "$i:"; ffmpeg -i "$i" -map 0:a -af ebur128=framelog=verbose -f null - 2>&1 | awk '/I:/print $2'; done to extract LUFS and then using for i in *.mp4; do ffprobe -v quiet -select_streams v:0 -show_entries format=filename:stream_tags=creation_time -of default=noprint_wrappers=1:nokey=1 "$i"; done to extract date of creation of mp4 files. How can I have those both command as a sequence or a script file so that I run the command only once, and I get both of those command run. I want to get the output (...)
• 22:53
  Stream images from python openCV with ffmpeg - Max D. Newest 'ffmpeg' Questions - Stack Overflow
  In order to try an embedded AI, I want to stream an image dataset through a rtsp stream. What I tried to do is to read one image every X seconds and send it to the stream and infere my AI on it. I tried to use this github repo :https://gist.github.com/takidog/2c981c34d5d5b41c0d712f8ef4ac60d3#file-main-py This is what I tried so far : import cv2 import time import subprocess as sp import glob, os __PATH = "./DATASET" os.chdir(__PATH) IMG_LIST = glob.glob("*.jpg") IMG_LIST_LEN = len(IMG_LIST) IMG_INDEX = 0 IMG_DELAY (...) -- https://gist.github.com/takidog/2c981c34d5d5b41c0d712f8ef4ac60d3#file-main-py
• 21:24
  Adding frames to gifs using FFMPEG - John Smith Newest 'ffmpeg' Questions - Stack Overflow
  I have the following code for /f %%i in ('dir /b /a-d %script_id%_tmp_img_*1.png') do ( ffmpeg -y -v error -i %%i -i %script_id%_tmp_blank_frame.png -filter_complex "overlay" overlayed_%%i del %%i ) It currently Adds a overlay image frame at every 10th frame EX , 1,11,21,31 ect ect anything that ends in *1 any advice how i would change this so instead it adds 8 overlay frames before the gif then 1 after the gif instead? Any help would be great i am super stuck thanks (...)
• 20:43
  Mixing audio, given timestamps. How to do it efficiently? - Evil Newest 'ffmpeg' Questions - Stack Overflow
  I have two stereo sounds, 1.wav and 2.wav, these sounds are less than 1 second long and list of timestamps (miliseconds from start of recording). Recording of pure video (recording.mp4) is several hours long and there are thousands (20 000 - 30 000) of timestamps per sounds. I want to convert list of timestamps and sounds into one recording, merging it with video. The part of merging audio with video is easy with ffmpeg, so this is not part of the question. The list of timestamps is tsv, for example: 1201\\t1.wav 1501\\t2.wav 1603\\t1.wav and so on, up to 50 (...)
• 22:28
  ffmpeg keyframe control on single image + audio - user3190036 Newest 'ffmpeg' Questions - Stack Overflow
  I have scoured every related stackoverflow question I can find and none of them solved the issue, apologies in advance if I missed the one that would have worked. The application I am working on converts a video or audio file to an mp4, and later on the server to an hls playlist. I just implemented audio and I wanted a background image. After reading through various options on stackoverflow I settled on the following args: y -i "C:\\path\\ExternalAudioBackground.png" -i "C:\\path\\Audio.mp3" -vf scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:-1:-1:color=black -c:a (...) -- https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 18:50
  How to enable libx264 for FFmpeg on Elastic Beanstalk - user15575918 Newest 'libx264' Questions - Stack Overflow
  My question is very similar to that of this person, but the suggested answer did not work for me. Using the following ffmpeg.config file in .ebextensions I am able to install ffmpeg, but without the libx264 codec. packages: yum: autoconf: [] automake: [] cmake: [] freetype-devel: [] gcc: [] gcc-c++: [] git: [] libtool: [] make: [] nasm: [] pkgconfig: [] zlib-devel: [] sources: /usr/local/src: http://ffmpeg.org/releases/ffmpeg-4.4.tar.bz2 commands: ffmpeg_install: cwd: (...)

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

• 19:01
  "Uncurve" Cinerama-like videos - silent Newest 'ffmpeg' Questions - Stack Overflow
  I'm pretty new to ffmpeg and I recently found interesting videos that are trying to simulate the Cinerama technology back from 1950x by curving the final video. Here is the screenshot how it looks like during the playback: I was wondering if it's possible to make this kind of picture back to "normal" rectangular shape? Here's a small (30 seconds, 48MB) example of how it looks like: https://ufile.io/8b0139j0 Thanks! -- Cinerama technology, , https://ufile.io/8b0139j0
• 17:36
  conflicting of headers between ffmpeg and s3 - Juliette Newest 'ffmpeg' Questions - Stack Overflow
  I have the code below in my server.js file for a web app that uses express for the backend and a built create react app that it serves. require('rootpath')(); const path = require('path'); const express = require('express'); const app = express(); const bodyParser = require('body-parser'); const cookieParser = require('cookie-parser'); const cors = require('cors'); app.use(bodyParser.urlencoded( extended: false (...)
• 17:26
  Is there a way to parse Hevc rtsp packets and find height and width in c++ application - dinesh47 Newest 'ffmpeg' Questions - Stack Overflow
  I have written a C++ application with processing of RTP video and Audio packet(Bitstream packets) but can't able to find a way to get height and width from VPs,SPs or PPs from every keyframe. Note:I am using only pure c++ codes until encoding and writing the file part with ffmpeg lib Need to know How to Extract it from that extra data for Memcopy it to add with start code. Need to find Height and width with it(Parsing). i have Written in case like the folowing: byte *packet=&*(frameData); int size =ptr->m_size; boost::shared_ptr (...)

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

• 14:40
  packet: initialize time_base field to (0, 1) instead of (0, 0) - Lynne git.videolan.org Git - ffmpeg.git/rss log
  packet: initialize time_base field to (0, 1) instead of (0, 0) Forget rational or irrational numbers, division by zero is undefined. [DH] libavcodec/avpacket.c

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

• 14:51
  Targeting a specific file size in vp8+vorbis encoding using ffmpeg - Mohammad Zamanian Newest 'ffmpeg' Questions - Stack Overflow
  I have a couple videos that I want to encode to vp8 for video and Vorbis for audio. This is the FFmpeg command I'm currently using: ffmpeg -y -i input.mp4 -map 0:v:0 -s 640x360 -filter:v fps=20 -c:v libvpx -crf 10 -b:v 200k -map 0:a:0 -b:a 48k -c:a libvorbis output.webm I want to have control over output file size and limit it to 3MB without clipping the video, but instead, lose quality. so I cant use -fs 3MB. How can I determine the file size based on video and audio bitrates and duration? How can I limit the file size without (...)

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

• 14:00
  lavd/lavfi.c: Set time_base for 608 cc to container time_base. - Yun Zhang git.videolan.org Git - ffmpeg.git/rss log
  lavd/lavfi.c: Set time_base for 608 cc to container time_base. Suggested-By: ffmpegⓐfb.com [DH] libavdevice/lavfi.c [DH] tests/ref/fate/sub-cc [DH] tests/ref/fate/sub-cc-realtime

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

• 13:57
  What is the fastest method to compress videos before sending in React Native Chatting app - Jawad Chawich Newest 'ffmpeg' Questions - Stack Overflow
  So my question is mainly in the title, I'm working on a chatting app and I have to compress the videos before sending to the database (firebase storage). All I could find till now is ffmpeg, but the issue is that it's taking tremendous amount of time to compress videos, for a 10 sec video it would take like a minute, and i was astonished how fast it's done in whatsapp.. so is there any other method to compress videos faster? Or does changing the ffmpeg command make an acceptable difference? the currently used command is "-y -i $rVideoUrl -c:v libx264 -crf 28 -preset (...)
• 13:46
  Where are there working exdamples for QSV enabled ffmpeg filters? - Bart Lederman Newest 'ffmpeg' Questions - Stack Overflow
  I'm re-posting this question in a modified form because I'm told that stack overflow doesn't allow anyone to ask for the location of documentation. So now I'm not asking for documentation, I just want working examples of how the QSV enabled filters are used, with a specific question on why async doesn't work with vpp_qsv . I have a PC running Windows which is QSV capable. I've found the codec and at least one QSV filter which really speed up decoding and encoding AVC (x264) videos. But the experience is extremely aggravating, as I cannot find a list (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/vf_vpp_qsv.c
• 12:47
  How can I improve the frame rate of my Raspberry Pi to YouTube stream? - RDowns Newest 'ffmpeg' Questions - Stack Overflow
  I am using a Raspberry Pi 4 2GB to live stream to YouTube. The performance is pretty poor at the moment as I am trying to go through terminal and I feel the setting's are not correct. Performance is OK however if I go directly through YouTube studio and use the 'Webcam' option instead of 'Stream'. These are the settings that I am currently using: raspivid -o - -t 0 -vf -hf -fps 30 -b 6000000 | ffmpeg -threads 0 -f v4l2 -i /dev/video0 -ar 44100 -ac 2 -acodec pcm_s16le -f s16le -ac 2 -i /dev/zero -acodec aac -ab 128k -strict experimental -s 640x480 -b (...)
• 12:02
  How text align text filter in ffmpeg with multi line text - Konduri Sai Aditya Newest 'ffmpeg' Questions - Stack Overflow
  how text align center, right , left positions with drawtext with multi line as input. "Hello \\n world"
• 11:58
  How to use ffmpeg with drawtext and a emoji TTF - morrislaptop Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to overlay some text emoticons on top of a video using ffmpeg.. This works fine for normal TTF's e.g. ffmpeg -i video.mp4 -vf drawtext="Arial.ttf: text='YENTL
• 07:45
  Remove Static Pixels from a Video to Mimic a Green Screen Effect [closed] - nKrkan Newest 'ffmpeg' Questions - Stack Overflow
  I have a video that's 50 seconds in length, resolution of 480x480 and 16 frames per second. There is a person talking in it, with the background being static I thought if there's a way to remove those static pixels (background) and just extract the moving pixels (foreground) and possibly mimic a green screen effect? I was thinking on writing a picture-by-picture comparison tool to do such thing but I don't believe I'm up to the task, or maybe It's laziness. And now I know, some of you will point out that the video has compression (...)
• 09:35
  FFMPEG- Convert video to images - hack Newest 'ffmpeg' Questions - Stack Overflow
  how can i convert a video to images using ffmpeg? Example am having a video with total duration 60 seconds. I want images between different set of duration like between 2-6 seconds, then between 15-24 seconds and so on. Is that possible using ffmpeg?
• 08:49
  converting hls livestream to rtmp - dedshit Newest 'ffmpeg' Questions - Stack Overflow
  i'm new to ffmpeg Is it possible to convert hls livestream into rtmp (facebook) eg: hls into rtmp is this even possible ? sorry moderators for my bad grammer forgive me -- hls
• 03:22
  FFmpeg convert .mov to .ogv - Morten Hauberg Newest 'ffmpeg' Questions - Stack Overflow
  I have some troubles converting my .mov to a .ogg file using FFmpeg. This command should work, right? ffmpeg -i test.mov -s 640x320 -vcodec libtheora -acodec libvorbis out.ogv It gives me this output [0] => FFmpeg version SVN-r0.5.9-4:0.5.9-1, Copyright (c) 2000-2009 Fabrice Bellard, et al. [1] => configuration: --extra-version=4:0.5.9-1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora (...)
• 00:38
  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 ?