18 May

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

• 19:48
  I'm trying to hide information in a H264 video. When I stitch the video up, split it into frames again and try to read it, the information is lost - Wer Wer Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a video steganography python script. The algorithm for hiding will be... convert any video codec into h264 lossless save the audio of the video and split the h264 video into frames hide my txt secret into frame0 using LSB replacement method stitch the video back up and put in the audio ...and when I want to recover the text, I'll save the audio of the video and split the encoded h264 video into frames retrieve my hidden text from frame0 and print the text So, this is what I can do: split the (...)
• 19:42
  Edge of text clipped a few pixels in ffmpeg - THEMOUNTAINSANDTHESKIES Newest 'ffmpeg' Questions - Stack Overflow
  Trying to make a short video of a background image with text and some background audio. It's functional, but the right side of each line of my text is always clipped a few pixels. What am I missing? Here's my python code (which includes the ffmpeg command): font_size = 100 text='Example Text Example Text \\n Example Text' font_path = 'Bangers-Regular.ttf' image_path = 'background.jpg' audio_path = 'audio.wav' duration = 15 #or whatever the audio's length is output_path = (...) --
• 18:49
  FFMPEG merge continous input stream with intermittent input stream without waiting - gian848396 Newest 'ffmpeg' Questions - Stack Overflow
  My goal is to take two audio inputs and merge them. The below works for this, however, I want a continuous output stream even when only one of the two inputs are being streamed into FFmpeg. The below only produces an output when the stdin pipe input is receiving audio. Here I have an FFmpeg child process where one input is a stream from the device's microphone, the other comes from wav audio buffers sent to the server in clips by a client. ⓐInjectable() export class AppService ffmpegProcess: ChildProcessWithoutNullStreams; constructor()  (...)
• 18:19
  ffmpeg.wasm DOMException: Failed to construct 'Worker': Script at '/814.ffmpeg.js' cannot be accessed from origin '' - Quantum Newest 'ffmpeg' Questions - Stack Overflow
  I have written a google chrome extension using local ffmpegwasm files (no need to run a server or download any ffmpegwasm files), which allows users to click an injected 'download' button under Reddit videos (via content_scripts). This was working great on ffmpegwasm v11, but since migrating to v12 (latest version) I have been unable to solve the following exception which is triggered during ffmpeg.load(): as seen in chrome's console log: DOMException: Failed to construct 'Worker': Script at 'https://www.redditstatic.com/814.ffmpeg.js' cannot be (...)
• 18:04
  FFmpeg-Python command too long because of drawtext - Xascoria Newest 'ffmpeg' Questions - Stack Overflow
  I have a FFmpeg-Python program that puts subtitles into a video, pseudocode below: for i in range(10000): video= video.filter( 'drawtext', fontfile=FONT_FILE, text=cur_string, x='(w-text_w)/2', y='(h-text_h)/2', fontsize=FONT_SIZE, fontcolor=FONT_COLOR, borderw=2, bordercolor=FONT_OUTLINE_COLOR, enable=f'between(t,i,i+1)') video.output(PATH).run() The code above gives the following error: FileNotFoundError: [WinError 206] The filename or extension is too long My questions are: (1) Is (...)
• 10:28
  How to stream lossy audio in chunks? - Adam Newest 'ffmpeg' Questions - Stack Overflow
  On the client side, I'm collecting periodically received audio slices into a circular buffer during the playback to avoid having to receive the entire file at once, only a small portion of its size. On server side I tried splitting MP3/M4A/OGG into frames, but even with ffmpeg, a gap is created in the chunk (usually at the beginning/end), which prevents me from validly concatenating them on the client side. Not even when I encoded the MP3 to PCM beforehand and then split the WAV file into MP3 chunks. Of course, split to WAV chunks there is no gap, but one slice is larger than (...) --
• 05:42
  how to merge two mp4 files (audio & video) with ffmpeg using script? [closed] - mayor Newest 'ffmpeg' Questions - Stack Overflow
  I need a script (in win 10) that will do the following thing: Retrieve the name of the directory it is in. In this directory are placed two mp4 files - video and audio separately. The files have different names. Script will merge them using ffmpeg into one mkv (ffmpeg -i ... - i ... -c copy “the name of the directory in which the script and files.mkv”) end The idea is that I put myself this script in some directory, run it and have the job done without typing the command manually. Thank (...)
• 08:55
  how to creating V210 encoder in pure c/c++ code - mans Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to implement V210 video encoding by writing the encoder by myself in c/c++ and not using any library. To achieve this, I am trying to see how I can create frame data and then use FFMPEG to put the frames in a video container using this command ffmpeg -s 1280x720 -f v210 -i frames.bin -c:v copy sample_video.mkv to create the frames.bin, I am creating a list of blocks based on the specifications that I found above. The code that I am using to pack YUV to the block is as follows: #pragma pack (push,1) class V210Block public:  (...) -- V210 video encoding
• 07:07
  Convert m3u8 file to mp4 file in React Native Expo - DRx Newest 'ffmpeg' Questions - Stack Overflow
  How can I convert m3u8 file to mp4 file in React Native Expo? I have tried to convert m3u8 file to mp4 using FFmpegKit but I have this errors: 'Cannot read property 'getLogLevel' of null' and 'Cannot read property 'ffmpegSession' of null' Also building with this package failing (Could not determine the dependencies of task ':ffmpeg-kit-react-native:compileDebugAidl'.). Is there a simple and easy way to convert m3u8 file in React Native Expo? Code I have used: import FFmpegKit from (...)

17 May

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

• 10:12
  FFMPEG - colorkey [closed] - Acnologla Newest 'ffmpeg' Questions - Stack Overflow
  i am using the following command to remove chroma key: ffmpeg -i black.png -i video.mp4 -filter_complex '[1:v]colorkey=0x70d021:0.35:0.15[ckout];[0:v][ckout]overlay[out]' -map '[out]' video-.mp4 but it results in these strange things around her original video Out video -- original video, Out video
• 15:20
  ffmpeg: Apply a time-based expression to control lowpass, highpass, aphaser, or aecho [closed] - Wes Modes Newest 'ffmpeg' Questions - Stack Overflow
  I am constructing complexFilters to procedurally generate audio with ffmpeg via fluent-ffmpeg. The interesting part of my fluent-ffmpeg complex filters look like: "filter": "volume", "options": "volume": "min(1, max(0, ((cos(PI * t * 1 / 13) * 1 + cos(PI * t * 1 / 7) * 0.5 + cos(PI * t * 1 / 3) * 0.25) + -0.5 ) * 0.75 * -1 + 0.5))", "eval": "frame" , "inputs": "track_1_output", "outputs": "track_1_adjusted" , Note that I am using an expression to determine the volume dynamically. To simplify my tests, I'm (...)
• 23:38
  play encrypted movies in vlc by decrypting them by ffmpeg "on the fly" - doctor Newest 'ffmpeg' Questions - Stack Overflow
  I would like to play encrypted movies in vlc by decrypting them by ffmpeg like below on macOS. The size of my movie is, say, 200-1000MB. (hundreds of files) My problem is that it is too slow to decrypt; it takes 5mins for 300MB movie before it starts to play. My guess is that ffmpeg first decrypts the whole content of 300MB and then VLC plays it. My question: Is it possible to play the movie "on the fly" while decrypting it? (play the decrypted chunk once it is decrypted, Not wait until the whole movie is decrypted before it plays, so that it starts to play in, say, (...)
• 22:42
  Discord Bot Freezes and Stops Sending/Receiving Audio Buffers - Nerevaine Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a Discord bot that connects to a voice channel, listens to the audio, and sends it to a WebSocket server. Initially, everything works fine, but after some time, the bot freezes and stops sending/receiving audio buffers. After a certain period, the bot stops processing audio. There are no errors thrown, but the audio buffers stop being sent and received. Here are the key parts of the code I use to handle the connection and audio processing: let count = 0; await entersState(connection, VoiceConnectionStatus.Ready, 30000); const player = (...)
• 22:10
  Making a video with opencv and ffmpeg. How to find the right color format? - luc Newest 'ffmpeg' Questions - Stack Overflow
  I have a webcam video recorder program built with python, opencv and ffmpeg It works ok except that the color of the video is more blue than the reality. The problem seems to come from color format of images. It seems that OpenCv is giving BGR images and ffmpeg+libx264 is expecting YUV420p. I've read that YUV420p correspond to YCbCr. opencv has no conversion from BGR to YCbCr. It only has a conversion to YCrCb. I have made some searchs and tried different alternatives to try converting opencv image to something that could be ok for (...)
• 21:33
  Persistent AbortError During Reconnection Attempts in Discord Bot - Nerevaine Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a Discord bot that connects to a voice channel, listens to the audio, and sends it to a WebSocket server. Initially, everything works fine, but after some time, when I try to reconnect after losing the connection, I encounter `AbortError` repeatedly. Despite several attempts to handle this error, the problem persists. The error occurs during the reconnection attempts. Here is the error message I keep receiving: Attempting to reconnect: Try 1 of 5Reconnect attempt 2 failed: AbortError: The operation was abortedat EventTarget.abortListener (node:events:1008:14)at (...)
• 14:16
  Burning subtitles into video with ffmpeg with specific margin not working - Anthony Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to build a tool where people can position their subtitles on an HTML5 video and then I will burn the subtitles into the video for them. I can easily get the position of the subtitles, in whatever format I need, that's easy. However, no combination of values that I feed to ffmpeg are working. My holy grail is an x and y offest (aka offset 5% from the left, 10% from the bottom, in terms of video height/width). To achieve this, I would like the subtitles to start in the very bottom-left corner. ffmpeg -y -i english.mp4 -vf (...)
• 10:00
  What are all of the file extensions supported by FFmpeg - zjevander Newest 'ffmpeg' Questions - Stack Overflow
  How would I go about getting a list of all the file extensions supported by FFmpeg for use in an ExtensionFilter used by FileChooser in JavaFX? I am familiar with the "-codecs" and "-formats" options from FFmpeg, but these list the format and codec names which do not necessarily coincide with their file extensions. e.g. (partial output from "ffmpeg -formats") D aac raw ADTS AAC (Advanced Audio Coding) DE ac3 raw AC-3 E matroska Matroska parsing aac and ac3 from the output of ffmpeg would work fine to create file extensions for those (...)
• 09:28
  Convert a bash script to Windows bat script [closed] - gyandoo Newest 'ffmpeg' Questions - Stack Overflow
  I have a bash script, now I need to convert it to bat. What the script does is based on the shortcut the script checks the audio codec and video codec using ffprobe and then loops through all the files in the folder to convert the file(s) using the presets based on which one the shortcut calls. It also limits the processor usage before running ffmpeg. Here's the script: #!/bin/sh FILES="/home/red/Downloads/to_convert/*" to_convert="/home/red/Downloads/to_convert" TYPE="$1" #echo "$TYPE" if [ -e '/tmp/convert.txt' ]; then echo (...)
• 03:46
  ffmpeg: Apply a time-based expr to control intensity of lowpass, highpass, aphaser, or aecho [closed] - Wes Modes Newest 'ffmpeg' Questions - Stack Overflow
  I am procedurally constructing complexFilters for ffmpeg via fluent-ffmpeg. My fluent-ffmpeg complex filters look like: "filter": "volume", "options": "volume": "min(1, max(0, ((cos(PI * t * 1 / 13) * 1 + cos(PI * t * 1 / 7) * 0.5 + cos(PI * t * 1 / 3) * 0.25) + -0.5 ) * 0.75 * -1 + 0.5))", "eval": "frame" , "inputs": "track_1_output", "outputs": "track_1_adjusted" , Note that I am using an expression to determine the volume dynamically. Here I'm testing on the command line, to understand the (...)