30 mai

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

• 03:12
  Is it possible to pregenerate m3u8 file? (the playlist only) and skip the transcoding? - Jonathan Lightbringer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a media server, and only want to transcode video when it's played. However I need the playlist in advance so that the client play can load the video metadata. Is this possible? I want to do something like this: Client -> GET m3u8 (pregenerated in advance) Client -> GET ts -> Transcode only this single ts file Client -> GET ts -> Transcode only this single ts file Client -> GET ts -> Transcode only this single ts file I don't want to transcode the entire video at once, I want to be able to only transcode the part that is (...)

29 mai

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

• 21:53
  Moviepy not updating FFmpeg Version after FFmpeg Install? - The_ Game12 Newest 'ffmpeg' Questions - Stack Overflow
  I've been toying around with MoviePy, and recently switched a project to a new computer at home to continue messing around with it. However, I tried running what I had previously written (which ran perfectly fine on the other computer) and I get this: OSError: MoviePy error: failed to read the first frame of video file ./Gameplay/minecraft- gameplay2.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent (...)
• 16:10
  Rounded corners in subtitle (Advanced Substation Alpha [.ass]) - Leander Mihm Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to have rounded corners with the BorderStyle 4 in .ass (Advanced Substation Alpha)? I only found out that the BorderStyle 4 exists, because I was looking at this stackoverflow. Is there any good and complete documentation of the Advanced Substation Alpha format? I'm currently using the following configuration: BorderStyle=4 Outline=10 --
• 13:26
  How to correctly apply select filter after trim in ffpeg? [closed] - lakhan dhingra Newest 'ffmpeg' Questions - Stack Overflow
  I am using the following ffmpeg command to trim and select certain portions of the video. ffmpeg -v verbose -i test.mp4 -filter_complex \\ "[0:v]trim=start=5:end=40,setpts=PTS-STARTPTS[v_trimmed]; \\ [v_trimmed]select='between(t,10,20)',setpts=N/FRAME_RATE/TB[v]; \\ [0:a]atrim=start=5:end=40,asetpts=PTS-STARTPTS[a_trimmed]; \\ [a_trimmed]aselect='between(t,10,20)',asetpts=N/SR/TB[a]" \\ -map "[v]" -map "[a]" -y -r 30 output_video.mp4 The above command errors out with the following trace [h264 ⓐ 0x12570a0e0] Reinit context to (...)
• 07:52
  avformat_open_input not read only? is a bug? [closed] - qyt Newest 'ffmpeg' Questions - Stack Overflow
  I'm recording my screen on Windows using the command: ./ffmpeg -f gdigrab -framerate 30 -i desktop -c:v libx264 -crf 20 -preset ultrafast -max_muxing_queue_size 1024 -hls_time 5 -hls_list_size 10 -hls_flags delete_segments -hls_segment_filename "d:\\\\1\\\\file%03d.ts" "d:\\\\1\\\\playlist.m3u8" Then I use the function avformat_open_input to open this m3u8 file, but after calling this function, the m3u8 file stops updating. When I use the command ./ffmpeg -i D:\\1\\video.m3u8 -c copy -f mpegts "srt://xxxxx?streamid=#!::h=live/qyt,m=publish", the test results are the same. However, when I (...)
• 13:26
  How to create a video of a precise duration from a single image or by trimming a video using FFmpeg? [closed] - aas Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a video from a single image with a very specific duration of 0.09375 seconds using FFmpeg. I've tried various commands, but I can't seem to get the exact duration I need. The closest I've gotten is 0.080000 seconds. It doesn't always have to be something like 0.09375, but I wanted to have an example for it. I've also tried trimming a video, but from what I've read so far, the encoding of the video can be a problem. Even after trying different FFmpeg commands or using MoviePy directly, I've never arrived at the desired (...)
• 15:10
  In Advanced SubStation Alpha (Ass file) how can I animate each word as it is spoken? - Nick Powers Newest 'ffmpeg' Questions - Stack Overflow
  Hello I am trying to get Ass (Advanced SubStation Alpha) code to animate (highlight in green) each word as it is spoken and then have it revert back to white afterwards. What happens with my code is very odd. At first I cannot even see any text. It then appears with multiple lines overlapped, partially hanging off the screen. From this point it "kind of" works. I can see the desired highlighting happening but because the text is all jumbled and overlapping it can hardly be called a success. In case it is relevant I am using ffmeg to burn in the subtitles. I am using the following (...)
• 14:11
  Coordinates with file format .ASS - Alex Newest 'ffmpeg' Questions - Stack Overflow
  I'm grabbing my text coordinates that I want to use for the file format .ASS and for centering on a 1080 by 1920 video, I have an application that displays where the text is on the video and can retrieve the position, an example of centered position is 310 by 800. When I try to set the position of the text inside the .ASS with those positions it doesn't write the caption where is meant to be. Could some explain how a .ASS positioning works. If use 200 px by 200 px as positioning it places it way further than the center even though the video its a 1080x1920 video, shouldn't (...) -- ,
• 13:47
  Get access to SDL texture pixels - chugadie Newest 'ffmpeg' Questions - Stack Overflow
  Is there anyway (besides the documented slow method) to get access to the texture pixels from an SDL2 texture? SDL_RenderReadPixels says Warning: this is a very slow method and should not be used frequently. I want to point an ffmpeg AVFrame->data over to the texture pixels and have it encode what's in the texture. Basically, screen grab a texture after rendering and blending several textures together. SDL_LockTexture() gives write-only access to the pixels. The docs also say not to expect pixel data to be present in the pointer returned to you. Is it possible with (...)
• 07:46
  easy normalization with FFmpeg - joberry Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to write software to edit audio files. One aspect of this software is a normalization function. Until now, I have been normalizing audio with Audacity. Now, I want to normalize them using FFmpeg from a C# application. I looked into the documentation of FFmpeg and saw that there are different types of normalization. Additionally, FFmpeg has a lot of settings, which I find overwhelming. For Python, I found a nice library that makes it easy to normalize audio: from pydub import AudioSegment from pydub.effects import normalize def (...)
• 07:33
  Issues with Publishing and Subscribing Rates for H.264 Video Streaming over RabbitMQ - Luis Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a project to stream an H.264 video file using RabbitMQ (AMQP protocol) and display it in a web application. The setup involves capturing video frames, encoding them, sending them to RabbitMQ, and then consuming and decoding them on the web application side using Flask and Flask-SocketIO. However, I am encountering performance issues with the publishing and subscribing rates in RabbitMQ. I cannot seem to achieve more than 10 messages per second. This is not sufficient for smooth video streaming. I need help to diagnose and resolve these performance (...)
• 06:09
  FFMPEG command error : audio device not found - Yash Rajput Newest 'ffmpeg' Questions - Stack Overflow
  So, basically i am making a google meet audio recorder (bot) and i wanna automate the audio recording process as soon as i enters into the meet. but my the code is not working as expected. I'm using the FFMPEG to record the audio and save it to the local machine at the desired location but it's throwing the error as shown in the picture.Error that i am getting I am using the correct name of my audio input device but still it's showing the same error , there's only one input audio driver installed on my machine as you can see it in a picture.name of audio (...) -- Error that i am getting, name of audio input device/driver, FFMPEG command
• 00:49
  How to get the dimensions of the first input in ffmpeg - Arjen Newest 'ffmpeg' Questions - Stack Overflow
  I have the following command: "ffmpeg -i video.mp4 -i input.png -filter_complex [1:v]scale=iw*(iw/920):-1[scaled];[0:v][scaled]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2 -c:v libx264 -c:a aac -strict experimental -pix_fmt yuv420p -y output-scaling.mp4" In the scale section, it takes the width of the input.png but i want the width of the video.mp4. Is this possible?

28 mai

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

• 12:11
  Problems using Intel Quick Sync H.264 Encoder with FFMPEG (shared) [closed] - Michael Werner Newest 'ffmpeg' Questions - Stack Overflow
  OS: Windows 11 Pro IDE: Visual Studio 2022 PL: C++ Libraries: FFMPEG shared (own x64 Windows build with libmfx) I am trying to encode frames from a framegrabber card with Intel Quick Sync Encoder using libmfx in FFMPEG shared / libav but I am getting an error always. The "same" procedure using ffmpeg.exe of same build works fine. I increased the FFMPEG logging level to the maximum level. The avcodec_send_frame function always returns -22 (which means "Invalid argument"). And I do not get more information from the log output /console. The only (...)
• 22:51
  PyQt QGraphicsScene Render Scene As Video Format - Alex Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to allow the user to export the scene as an mp4 (video format), the items of the scene consists of QGraphicsVideoItem and multiple QGraphicsTextItem, I need to export the scene as it will allow the user to save the video with the text items. I've found one of the ways to do this but the issue is that it will take hours for a simple 5 seconds videos as it saves every image to a byte to create a video, every image is a millisecond. If I change from millisecond to seconds it could speed up but the video will not look as smooth, is there a more efficient way of doing (...)
• 19:48
  Can't write packet with unknown timestamp av_interleaved_write_frame(): Invalid argument - jagvetinte Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert a .ts file with this output to mkv: ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers built with Apple clang version 12.0.0 (clang-1200.0.32.27) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt (...)
• 17:51
  how to fix Non-monotonous DTS in output stream 0:1; when using ffmpeg - xiao xin Newest 'ffmpeg' Questions - Stack Overflow
  When I use ffmpeg to convert m3u8 to mp4, I get some warning, ffmpeg -i xx.m3u8 -c copy demo.mp4 warning is Non-monotonous DTS in output stream 0:1; previous: 3277744, current: 3276712; changing to 3277745. This may result in incorrect timestamps in the output file. Non-monotonous DTS in output stream 0:1; previous: 3277745, current: 3277736; changing to 3277746. This may result in incorrect timestamps in the output file. what should I do to fix (...)
• 15:16
  ffmpeg not recording frames - RCam Newest 'ffmpeg' Questions - Stack Overflow
  I am using Python to record 5 second videos from 3 webcams at once using ffmpeg. The recordings repeat at intervals of ~25 seconds. The code seems to work except intermittently a recording from one of the cameras will be 0 seconds long. There don't seem to be any obvious errors, and the file is created it just doesn't contain any frames. The key components of the code are: def take_vid1(path1, video_length, sampleN): dt = datetime.now().strftime("%Y_%m_%d_%H_%M_%S") save1 = os.path.join(path1, dt+'_1'+sampleN+'.mp4') command (...) -- https://drive.google.com/file/d/1VKBBsf8pZbqNyYLE6o2C0kFHeBAh2kZ1/view?usp=sharing
• 15:35
  Error with recording headless browser in ruby - KPEBETKA Newest 'ffmpeg' Questions - Stack Overflow
  We want to create a headless browser and record and stream a page in it. To do this, we use Ferrum and ffmpeg. But there is only one image in the output video, although the video duration is correct. Code: require 'ferrum' x = Ferrum::Browser::Xvfb.new(OpenStruct.new( window_size: [1920, 1080] )) x.start b = Ferrum::Browser.new(xvfb: true, browser_options: 'display': ":#x.display_id" ) b.goto 'https://google.com' ffmpeg_command = "ffmpeg -y -video_size 1920x1080 -framerate 25 -f x11grab -i :#x.display_id (...)
• 06:26
  Fingerprint vs transcribing, what is the best approach to identify an audio sample inside another longer audio [closed] - Bernard Wiesner Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to detect a shorter version of a spoken audio sample inside a longer audio (full version). The shorter audio should be the same or very similar to the one inside the longer version. I also need to have a rough estimate of the timestamp where the audio sample was found. Similar questions here: Identify audio sample in a file How to find the location of a specific word in an audio file? What I have researched so far: 1. fingerprints Using chromaprint extract the fingerprints from both audio files and store them in a DB, then compare them (...) -- chromaprint, whisper
• 12:26
  How to tell whether the colors in a video frame decoded by FFmpeg are pre-multiplied by alpha? - smokris Newest 'ffmpeg' Questions - Stack Overflow
  When I decode video frames with FFmpeg (avcodec_decode_video2(), sws_scale()), with some videos (e.g., ProRes4444), I get colors pre-multiplied by alpha, and with other videos (e.g., QuickTime PNG), I get colors that aren't pre-multiplied by alpha. How can I tell whether the colors are pre-multiplied? Alternatively, how can I tell FFmpeg to always provide either pre-multiplied or un-pre-multiplied ("straight alpha") colors?
• 11:03
  FFMpegCore .Net cuts off the fist few (~1.5) seconds of audio - Tim Newest 'ffmpeg' Questions - Stack Overflow
  I want to use FFMpegCore to convert some audio files to raw pcm. I noticed that this always cuts off ~1.5 seconds of my audio from the start. I check my input stream, saved it to HD all good. If use it from cli with the same arguments everything seem fine. I tried -ss 0, no luck. This behavior is observed with .wav (RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz), same issue with different sample rate. I tested mp3 works fine. public async Task ConvertToPcmStreamAsync(Stream inputStream) var outputStream = new MemoryStream(); var (...)
• 12:57
  FFmpeg find_package not found - YoungCoder Newest 'ffmpeg' Questions - Stack Overflow
  CMake cannot find FFmpeg even though everything is right setup. I used vcpkg to install ffmpeg I can't find any information to setup ffmpeg with CMake. I'm on Windows 10 with Visual Studio. Get findFFMPEG and put in ffmpeg folder but doesn't solve the issue. change the folder name to FFMPEG capital letters but still doesn't solve the issue. I get this error: Severity Code Description Project File Line Suppression State Details Error CMake Error at CMakeProject1/CMakeLists.txt:15 (find_package): By not providing "FindFFMPEG.cmake" in (...)
• 10:38
  How to change HLS quality in ijkplayer for flutter or alternative solutions? - gh05t Newest 'ffmpeg' Questions - Stack Overflow
  Hi can anyone help me with this issue, we decided to use the flutter ijkplayer as it's the only player on flutter that supports the option to change playback speed, but it doesn't have the option to change the hls quality, and neither does any other player as per my findings, if anyone knows please share. As for what I've tried, I download the file and split it into 4 files with each file having only one video and audio stream and use a button to change the file. I also tried to look into changing the tracks from master with the player but while FFMpeg does (...) -- github
• 10:10
  ffmpeg streaming an image failure - deonst Newest 'ffmpeg' Questions - Stack Overflow
  I am trying stream a static image on the network. Everything I have tried yet so far has failed: Examples: ffmpeg -y -stream_loop -1 -r 1 -i text2.png -vcodec libx264 -crf 17 -pix_fmt yuv420p -f mpegts udp://239.1.250.12:1234 File is generated but unplayable by VLC or any other TS capable device. ffplay complains about input frame errors but still produces a picture after a few seconds. Tried this for youtube solution as well to a local file. ffmpeg -f image2 -loop 1 -i text1.jpg -re -f lavfi -i anullsrc -vf format=yuv420p -c:v libx264 -b:v 2000k -maxrate 2000k (...)
• 05:54
  I'm new and am trying to convert video files [closed] - ZDM Newest 'ffmpeg' Questions - Stack Overflow
  So I have upscaled videos of the Fallout 1 cinematics but they're in .avi and I'm using Fallout1in2 which has the cinematics in .mve so I'm trying to convert the .avi to .mve and using ffmpeg I have used this command "ffmpeg -i C:\\PATH_Programs\\BOIL1.AVI BOIL1.MVE" but get this error "ffmpeg unable to choose an output format use standard extension for filename or specify the format manually". Am I doing something wrong or is it just not possible to do it this way? I have used this command "ffmpeg -i C:\\PATH_Programs\\BOIL1.AVI BOIL1.MVE" but get this error "ffmpeg (...)
• 08:22
  Flutter: How to use "ffmpeg_kit_flutter" to merge videos? - Hani Kanakri Newest 'ffmpeg' Questions - Stack Overflow
  i am using "ffmpeg_kit_flutter" to merge two videos with code import 'dart:io'; import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart'; import 'package:ffmpeg_kit_flutter/abstract_session.dart'; import 'package:ffmpeg_kit_flutter/return_code.dart'; import 'package:flutter/material.dart'; import 'package:flutter_bloc/flutter_bloc.dart'; import 'package:wechat_assets_picker/wechat_assets_picker.dart'; import (...)
• 08:00
  FFMPEG for merging video and audio sources from URLs as a stream - Michael Amir Newest 'ffmpeg' Questions - Stack Overflow
  If I wanted to play a video stream over the network but the video and audio are separated into two different URLs, can I use FFMPEG to stream merge those two sources? Because waiting for FFMPEG to merge both files into a single local file will probably take sometime which wouldn't be nice for the user experience.
• 07:02
  php ffmpeg cannot save video to system temporary folder - user2818066 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to covert a video to h.264 format. I can save the new video to a normal directory but saving the new video to a Windows temp file fails. However I can manage to save a snapshot image from the video into Windows temp folder without problem. I cannot figure out what is the problem? require_once(dirname(__FILE__).'/../vendor/autoload.php'); function get_ffmpeg_exe_path_arr_def() return( array( 'ffmpeg.binaries' => "C:/bin/ffmpeg.exe", 'ffprobe.binaries' => "C:/bin/ffmpeg.exe", 'timeout' => 3600000000, (...)
• 06:58
  file samples into frame : avcodec_fill_audio_frame - Mr.Wang from Next Door Newest 'ffmpeg' Questions - Stack Overflow
  Rust binding https://github.com/larksuite/rsmpeg of ffmpeg. I try to fill AVFrame with samples as below. let bgm_samples : AVSamples = ...; assert_eq!(bgm_samples.nb_channels, 1); assert_eq!(bgm_samples.sample_fmt, AV_SAMPLE_FMT_FLTP); let mut frame = AVFrame::new(); frame.set_nb_samples(bgm_samples.nb_samples); frame.set_ch_layout(AVChannelLayout::from_nb_channels(1).into_inner()); frame.set_format(bgm_samples.sample_fmt); frame.set_sample_rate(22050); frame .alloc_buffer() .context("Could not allocate frame (...) -- https://github.com/larksuite/rsmpeg
• 04:40
  ffmpeg conversion increase bitrate - Robert D Weir Newest 'ffmpeg' Questions - Stack Overflow
  When extracting Audio streams using ffmpeg from containers such as MP4, how does ffmpeg increase bitrate, if it is higher than the source bitrate? An example might be ffmpeg -i video.mp4 -f mp3 -ab 256000 -vn music.mp3. What does ffmpeg do if the incoming bitrate is 128k? Does it interpolate or default to 128k on the output music.mp3? I know this seems like not a so-called "programming question" but ffmpeg forum says it is going out of business and no one will reply to posts (...)

27 mai

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

• 23:36
  Extracting frames from video uniformly using ffmpeg (and doing it fast) - Sergio Newest 'ffmpeg' Questions - Stack Overflow
  I'm using this code to extract frames from a video: duration=$(ffprobe -v error -select_streams v:0 -show_entries stream=duration -of default=noprint_wrappers=1:nokey=1 "$input_video") # Calculate the time interval to uniformly extract frames fps=$(bc -l <<< "($num_frames)/$duration") fps=$(printf "%.2f" "$fps") echo "Extracting frames..." # Use FFmpeg to extract frames ffmpeg -loglevel quiet -i "$input_video" -vf fps="$fps" -q:v 2 "$output_folder/frame_%04d.jpg" This takes a lot of time even if I need a small number of (...)
• 20:31
  Ffmpeg - Video is missing audio after merging - Ondřej Omar Martínek Newest 'ffmpeg' Questions - Stack Overflow
  tl;dr I am trying to merge two videos using concat command. The videos merge well but the audio is missing. I get a warning message about "New audio stream with inder 1 at pos7354 and DTS 15s" which is exactly the time where the second video starts. I don't care about the audio stream from the first video, it is just a thumbnail, but I want the second video audio to work. I merged the files using: ffmpeg -i list.txt -c copy output.mp4
• 16:44
  install ffmpeg on amazon ecr linux python - Luka Savic Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to install ffmpeg on docker for amazon lambda function. Code for Dockerfile is: FROM public.ecr.aws/lambda/python:3.8 # Copy function code COPY app.py $LAMBDA_TASK_ROOT # Install the function's dependencies using file requirements.txt # from your project folder. COPY requirements.txt . RUN yum install gcc -y RUN pip3 install -r requirements.txt --target "$LAMBDA_TASK_ROOT" RUN yum install -y ffmpeg # Set the CMD to your handler (could also be done as a parameter override outside of the Dockerfile) CMD (...)
• 11:04
  FFmpeg not connecting to the NamedPipeServerStream - Arthur Edgarov Newest 'ffmpeg' Questions - Stack Overflow
  I am implementing a function to merge audio and video into a single stream using FFmpeg tool. The problem I have right now is that FFmpeg is not connecting to the pipes and I have no idea why. Can someone help me with this issue? Questions I already read: ffmpeg process how to read from pipe to pipe in c# ffmpeg output pipeing to named windows pipe How to use pipe in ffmpeg within c# Using pipes with FFMpeg as an input Arguments: -i "\\\\.\\pipe\\FFmpeg_8daf7" -i "\\\\.\\pipe\\FFmpeg_46100" -c:v copy -map 0:v:0 -map 1:a:0 -shortest -f mp4 (...)
• 11:53
  How to convert ffmpeg shell script parameters to php ffmpeg code? - user2818066 Newest 'ffmpeg' Questions - Stack Overflow
  I want to convert a video to h.264 codec. I can run ffmpeg from shell successfuly using this command: ffmpeg.exe -i C:/Users/fd/motorboat_org.mp4 -c:v libx264 -preset medium -crf 20 -c:a aac -b:a 160k -vf format=yuv420p -movflags +faststart C:/Users/fd/motorboat_2.mp4 How can I execute the same job in php ffmpeg using create method? How to get my following code correct to do the job? function get_ffmpeg_exe_path_arr_def() return( array( 'ffmpeg.binaries' => "C:/bin/ffmpeg.exe", 'ffprobe.binaries' => "C:/bin/ffmpeg.exe",  (...)
• 09:58
  My stitched frames colors looks very different from my original video, causing my video to not be able to stitch it back properly [closed] - Wer Wer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to extract some frames off my video to do some form of steganography. I accidentally used a 120fps video, causing the files to be too big when i extract every single frame. To fix this, I decided to calculate how many frames is needed to hide the bits (LSB replacement for every 8 bit) and then extract only certain amount of frames. This means if i only need 1 frame, ill extract frame0.png ill remove frame0 from the original video encode my data into frame0.png stitch frame0 back into ffv1 video concatenate frame0 video to the rest of the video, frame0 (...) -- Frame0.mkv, original.mkv, results.mkv
• 01:04
  Using ffmpeg to remove green screen from video - CYAD Newest 'ffmpeg' Questions - Stack Overflow
  I have a video: https://drive.google.com/file/d/1tiP2fX0Xfc6YjIymcHyEXP8-JqEJrlgG/view I'm trying to use ffmpeg to remove the green screen but none of the commands I use work. I saved a frame as a png and was able to remove the green from it: ffmpeg -i green.png -vf chromakey=green:0.1 out.png but the video edit does nothing. ffmpeg -i video.mp4 -vf chromakey=DarkGreen:similarity=0.2:blend=0.3 output4.mov I'm on a windows machine and need to output a format iOS and Android can use, though multiple formats are fine. Any (...) -- https://drive.google.com/file/d/1tiP2fX0Xfc6YjIymcHyEXP8-JqEJrlgG/view

26 mai

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

• 12:59
  FFMPEG img%d.png with Subdirectory [closed] - Xitano Newest 'ffmpeg' Questions - Stack Overflow
  How to use with subdirectory? Command: ffmpeg -framerate 1/X -i subdirectory/img%d.png -r 25 -pix_fmt yuv420p out.mp4 Result: Error opening input file subdirectory/img%d.png. It works in the same directory as the command, but when I try to use a subdirectory, it doesn't work.
• 09:38
  FFMPEG My stitched frames colors looks very different from my original video, causing my video to not be able to stitch it back properly - Wer Wer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to extract some frames off my video to do some form of steganography. I accidentally used a 120fps video, causing the files to be too big when i extract every single frame. To fix this, I decided to calculate how many frames is needed to hide the bits (LSB replacement for every 8 bit) and then extract only certain amount of frames. This means if i only need 1 frame, ill extract frame0.png ill remove frame0 from the original video encode my data into frame0.png stitch frame0 back into ffv1 video concatenate frame0 video to the rest of the video, frame0 (...) -- Frame0.mkv, original.mkv, results.mkv
• 05:48
  How to check 'Output bit depth' of the libx264 library in ffmpeg? - Greg Newest 'ffmpeg' Questions - Stack Overflow
  According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything about Output bit depth and the crf scale option is described as from -1 to FLT_MAX. How can I check if my ffmpeg is using 8-bit or 10-bit version of the libx264 library? -- x264 Encoding Guide

25 mai

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

• 01:10
  ffmpeg combine filters for audio and video [closed] - Wise Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use hue=s=0 alongside replacing audio using ffmpeg. I have this originally: /usr/bin/ffmpeg -y -i 'source.mp4' -filter_complex "amovie='audio.mp3':loop=0,asetpts=N/SR/TB[aud]" -map 0:v -map '[aud]' -c:v copy -c:a aac -b:a 128k -shortest 'out.mp4' This works great. Audio is replaced. Now I want to turn it black and white so I try to add hue=s=0: /usr/bin/ffmpeg -y -i 'source.mp4' -filter_complex "hue=s=0,amovie='audio.mp3':loop=0,asetpts=N/SR/TB[aud]" -map 0:v -map '[aud]' -c:v copy -c:a (...)
• 01:04
  Use ffmpeg to match an image to source frames in video [closed] - user22335954 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to write an application to split a single video into multiple pieces based on the appearance of a specific image. (Think title cards). I have video files that may have more than one episode or content inside of a single file and I want them split anywhere I find that title card or image. My application works by the user providing a timestamp in the format of 00:00:00 to specify the title card image which is then used like this: ffmpeg -i FILE -qmin 1 -qscale:v 1 -vframes 00:00:00 -f image2 img.png Now I want to compare that image (img.png) to the source (...) -- https://ffmpeg.org/ffmpeg-filters.html#Examples-46
• 11:07
  How can I use physical computer's GPU on VMware Workstation? - ching Newest 'ffmpeg' Questions - Stack Overflow
  I am ching. I want to use GPU to accelerate video transcoding time by using ffmpeg on the virtual machine, VMware Workstation. I use command lspci | grep VGA, the output is 00:0f.0 VGA compatible controller: VMware SVGA II Adapter It seems that I only can use its own Graphic Card on VMware, right? How can I use my physical computer's GPU, NVIDIA Quadro K2000? Or another solution can solve the problem mentioned on the (...)
• 11:06
  Compress video using ffmpeg.js - John Mark Newest 'ffmpeg' Questions - Stack Overflow
  I attempted to upload and compress a video using ffmpeg.js. However, it appears that this process is ineffective on modern browsers. I have already implemented console logging to verify if the video compression is occurring, yet thus far, no compression has been achieved. Could anyone suggest an alternative library for video compression that might better suit the requirements? import FFmpeg from 'ⓐffmpeg/ffmpeg'; export default methods: async handleFileInputChange(event) const file = (...)
• 07:09
  FFmpeg Error: Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_amix_54 - Josh Lawson Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a project to generate a click track using React.js and FFmpeg. The project includes an Express.js backend where I construct an FFmpeg command to combine multiple audio files (count-ins, vocal cues, and click sounds) into a single track. The final output should be an MP3 file. However, I'm encountering an error when running the FFmpeg command: Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_amix_54 How can I correctly construct the FFmpeg command to avoid the "Cannot find a matching stream for unlabeled input pad" error (...)

24 mai

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

• 13:45
  I use ffmpeg to encode and create MPEG file from a source MP4 file. In Mac the encoding is good but in windows it creates random green pixels [closed] - Amudhan R Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg 3.4.2 version to encode and create an MPEG-TS file using H.264 encoding. In both Windows and Mac the ffmpeg creates the video without any error. But the resultant video from windows having a green pixels on certain frames. No idea why this is happening. Below is the encoding command: ffmpeg -i VIDEO_SOURCE.mp4 -vf scale=720:480 -c:v libx264 -b:v 2M -minrate 2M -maxrate 2M -bufsize 2M -level:v 40 -profile:v main -bf:v 2 -r 30 -crf 22 -x264-params 'keyint=3:min-keyint=3:ref=2:8x8dct=0:weightp=1:subme=6:rc-lookahead=30' -c:a aac -b:a 130k -ar 48000 -f mpegts (...)
• 00:17
  ffmpeg Ghosting between RGB color channels [closed] - Blikpils Newest 'ffmpeg' Questions - Stack Overflow
  This seems like a very specific question so i hope there is someone who can help me out. Within FFMPEG i am trying to add (channel pack) 3 different grayscale videos in RGB within a webm or mp4 video. I got it to work to a degree via Merge planes. This is what i tried: ffmpeg -y -i video1.webm -i video2.webm -i video3.webm -filter_complex "[0:v]format=gray[r]; [1:v]format=gray[g]; [2:v]format=gray[b]; [g][b][r]mergeplanes=0x001020:format=gbrp" -pix_fmt yuv420p -t 00:00:03 output.webm This is the result: As you see the 9 is visible in the red and blue (...) --
• 18:28
  How to use ffmpeg to convert a flac file to alac and preserving all metadatas? - AxZxP Newest 'ffmpeg' Questions - Stack Overflow
  I use this loop to convert flac to alac : for i in *.flac; do ffmpeg -i "$i" -y -vn -c:a alac "$i%.flac".m4a; done But some tags are not exported. I tried to use the -map_metadata 0 -id3v2_version 2 flag but it does not change anything. Here you can find the tags that are copied (with or without the -map_metadata) : original tags tags copied When I use XLD Mac software it works perfectly but for some reasons I'd like to use CLI to convert flac (...) -- original tags, tags copied
• 15:33
  How to achieve real time video editing on Android? - Itamar Newest 'ffmpeg' Questions - Stack Overflow
  I've been working recently on a video-editing-related project on Android, and am desperately looking for resources related to video editing on the platform. The only video-editing related "method" or information I could find was using the FFmpeg library, which is pretty rich in features and capabilities but works really slow, operations such as reversing a 10-second video can take as long as 30 seconds, which delivers a really poor user experience. That being said, it seems that there are tons of Android video-editing apps that are capable of doing everything FFmpeg can, (...) -- InShot, PocketVideo, previous musical.ly TikTok
• 14:41
  How to convert .fbx to frame images - Ittefaq Technologies Newest 'ffmpeg' Questions - Stack Overflow
  I wanna to need help that i wanna to convert .fbx to video through script and i found a soluotion to do it through FFmpeg but it not supports .fbx so i need help in to get frame images so i can make video through ffmpeg or if i am goin in wrong direction you can help me I tried to convert a .fbx file to .obj using three.js and then create a video from the .obj file, but it didn't work. // Function to load FBX using FBXLoader function loadFBX(blob, loader, callback) var url = URL.createObjectURL(blob); loader.load(url, function(object)  (...)
• 14:08
  avcodec_find_encoder(AV_CODEC_ID_H264) returns null - Monjura Rumi Newest 'ffmpeg' Questions - Stack Overflow
  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 (...)
• 10:06
  Efficient Video Compression with ffmpeg.js - John Mark Newest 'ffmpeg' Questions - Stack Overflow
  I attempted to upload and compress a video using ffmpeg.js. However, it appears that this process is ineffective on modern browsers. I have already implemented console logging to verify if the video compression is occurring, yet thus far, no compression has been achieved. Could anyone suggest an alternative library for video compression that might better suit the requirements? import FFmpeg from 'ⓐffmpeg/ffmpeg'; export default methods: async handleFileInputChange(event) const file = (...)
• 08:04
  Decoding pcm_s16le with FFMPEG? - Davide Caresia Newest 'ffmpeg' Questions - Stack Overflow
  i have a problem decoding a wav file using ffmpeg. I'm new to it and i'm not quite used to it. In my application i have to input the audio file and get an array of samples to work on. I used ffmpeg to create a function that gets in input the path of the file, the position in time where to start to output the samples and the lenght of the chunk to decode in seconds. I have no reputation, so I had to make a gdrive directory where you can see the problem and the files on which I worked. Here it is: https://goo.gl/8KnjAj When I try to (...) -- https://goo.gl/8KnjAj
• 00:11
  Ghosting in colour channels - Blikpils Newest 'ffmpeg' Questions - Stack Overflow
  This seems like a very specific question so i hope there is someone who can help me out. Within FFMPEG i am trying to add (channel pack) 3 different grayscale videos in RGB within a webm or mp4 video. I got it to work to a degree via Merge planes. This is what i tried: ffmpeg -y -i video1.webm -i video2.webm -i video3.webm -filter_complex "[0:v]format=gray[r]; [1:v]format=gray[g]; [2:v]format=gray[b]; [g][b][r]mergeplanes=0x001020:format=gbrp" -pix_fmt yuv420p -t 00:00:03 output.webm This is the result: As you see the 9 is visible in the red and blue (...) --

23 mai

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

• 13:03
  What is the good library for video editing module in react.js? [closed] - tayyab manzoor Newest 'ffmpeg' Questions - Stack Overflow
  I want to add a module for video editing in my web app. I have researched about video editing tools like ffmpeg but it is not working. is there any plugin for video editing or I have to build my own with jquery? Thanks I have tried with npm package like ffmpeg but it is not working and I want to know is there any other pacakge for video editing.
• 23:57
  FFMPEG stream from python to browser using socketio - sam Newest 'ffmpeg' Questions - Stack Overflow
  I want to show the video on the browser streamed by ffmpeg. Here's the python script which i made but can't find the way to do so since i am not much into javascript. Can anyone help me please ? import socketio import subprocess import uvicorn sio = socketio.AsyncServer(async_mode='asgi', cors_allowed_origins='*') app = socketio.ASGIApp(sio) ⓐsio.event async def connect(sid, environ): await sio.enter_room(sid, 'Streaming') ⓐsio.event async def stream(cid): video_path = (...)
• 13:45
  ffmpeg combine 3 mp4s and 1 mp3 into 1 mp4 with wiperight transitions - tim Newest 'ffmpeg' Questions - Stack Overflow
  How can I use ffmpeg to combine 3 mp4s and 1 mp3 into 1 mp4 with wiperight transitions between the videos and a fade out the audio at the end. The mp3 is longer than the the videos but I only want the resultant video to be the length of the 3 mp4s.
• 13:37
  NodeJS : Fail to write byte array input from webcam to ffmpeg spawn process - Thanesh Prabaghan Newest 'ffmpeg' Questions - Stack Overflow
  I'm using NodeJS server to display an HTML page which has webcam option. Once user visited to my NodeJS server, it will serve html page. User can allow webcam option and see webcam view on the page. In the backend, I send webcam stream (byte array) using socket.io. I receive byte array successfully in backend with the help of socket.io. BUT MY PROBLEM IS, I can't pipe this byte array to the ffmpeg spawn process. I don't know how to properly pipe this data to the ffmpeg. Once it done, all my problem will be solved. On the other side, I have node-media-server as (...)
• 11:54
  Android ffmpeg white space in input path causing "no such file or directory" - Mehran Newest 'ffmpeg' Questions - Stack Overflow
  I'm using the latest version of WritingMinds/ffmpeg-android-java library. I've tried single/double quoting the path with no success. I Logged my command after execution, please look to the input path where a subDirectory contains whiteSpace, a comma has been added between the space: ffmpeg, -i, "storage/emulated/0/Telegram/Telegram, Video/4_5828137322067002802.mp4", -vf... I split and run my command like this: String crop = "-ss " + skipTimeForCrop + " -noautorotate -i " + newPath + " -vframes 10 -vf (...) -- WritingMinds/ffmpeg-android-java
• 11:17
  FFMpeg fails to compile - Nicolas Appriou Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to compile a project that needs a specific version of ffmpeg to work. I isolated ffmpeg build and tried to compile it on its own as done in the parent project. It seems to be version 6.1.1, the build system downloads ffmpeg from this url https://github.com/FFmpeg/FFmpeg/archive/e38092ef9395d7049f871ef4d5411eb410e283e0.zip before building it. I'm using an up-to-date debian testing distribution. When trying to build it on my own, I got this error message: $ ./configure --enable-shared --disable-static --disable-programs --disable-doc $ (...) -- https://github.com/FFmpeg/FFmpeg/archive/e38092ef9395d7049f871ef4d5411eb410e283e0.zip