All Questions
4,836 questions
0
votes
1
answer
33
views
How to automate ffmpeg to split and merge parts of video, and keep the audio in sync?
I have a Python script that automates trimming a large video (2 hours) into smaller segments and then concatenating them without re-encoding, to keep the process fast. The script runs these ffmpeg ...
- 31.3k
0
votes
0
answers
5
views
Issues with Video Recording Duration and Smooth Playback when Using v4l2 to MP4 (FFmpeg)
I'm trying to record a video from a USB device with v4l2 framework and save it in MP4 format using FFmpeg. My sample code successfully captures and saves the video, but I'm running into some issues:
...
- 11
-3
votes
1
answer
65
views
How do you convert fragmented MP4 to MP4 with ffmpeg and keep all fragments? [closed]
I am trying to convert a fragmented MP4 (fMP4) to a single MP4 file using ffmpeg. I expected the following command to work, but it only results in the initialization segment and the last three ...
- 854
0
votes
2
answers
95
views
Ffmpeg it's not setting the correct variable names and hence throwing Unable to choose format
I'm trying to automate the subtitle addition to a folder with some videos so I wrote the following script:
forfiles /p "C:\Users\titos\Resilio_Sync\4K_Video_Downloader\videoprocess" /m *.mp4 ...
1
vote
1
answer
40
views
Video Frame-by-Frame Deraining with MFDNet in Python
As this CodeReview question mentioned, I am trying to modify the code to process frame-by-frame rain streaks removal in a video. FFmpeg package is used in this code.
import argparse
import os
import ...
- 509
3
votes
0
answers
89
views
Calculating PCR (Program clock reference) in MPEG2 Transport stream
i am implementing transcoder and packager for abr protocols (HLS/DASH), and also udp mutlicast as output option. I am currently finishing multiplexing of mpeg 2 transport streams, but i do not really ...
1
vote
1
answer
119
views
Video streaming error: Uncaught (in promise) NotSupportedError: Failed to load because no supported source was found
Here is my problem: I have one video src 1080p (on the frontend). On the frontend, I send this video-route to the backend:
const req = async()=>{try{const res = await axios.get('/catalog/item',{...
- 21
1
vote
0
answers
210
views
Error Error sending packet to decoder -1094995529 when extracting audio from MP4 using FFmpeg C API
I am trying to extract audio from an MP4 file and save it as an MP3 using the FFmpeg C API. My code is able to identify the audio stream, set up the codec contexts, and start reading packets. However, ...
- 91
0
votes
0
answers
54
views
How to optimize this code that gets video frame as image
I am quite new to mp4 file. But here is my working attempt to extract image frame given video url and a timestamp.
In reality the input url is an 8K 10hours 200GB video, so I can't download it all, I ...
- 20.2k
1
vote
0
answers
191
views
How to extract the first frame from a video?
I am trying to extract the first frame from a video to save it as a preview.
Here's an almost working solution using ffmpeg:
func extractFirstFrame(videoBytes []byte) ([]byte, error) {
input := ...
- 1,044
0
votes
0
answers
3k
views
How to Download YouTube Videos in 1080p with English Subtitles Using yt-dlp with Python 3
I am trying to download YouTube videos using yt-dlp in Python 3.9. I want to download videos in 1080p quality and if 1080p is not available, it should download the best available quality. The audio ...
- 179
0
votes
0
answers
109
views
Download video with image overlay using flutter_ffmpeg
In my app i have a one video playing on screen, and on top of video I have placed one image. I want to save this video together with overlay image. So how to download using flutter_ffmpeg with flutter ...
- 177
0
votes
1
answer
344
views
nvenc for ffmpeg hardware acceleration with moviepy producing corrupted mp4
I've been trying to create a Python app that takes an mp4 file, an mp3 file, and a dictionary of captions to produce an output mp4 file.
I got it to work well but I found the libx264 codec to be quite ...
- 23
-5
votes
1
answer
211
views
When extracting a part of a video with ffmpeg, without reencoding, the output is choppy [closed]
I extract the part 00:02:00.000 to 00:03:30.000 of a video with ffmpeg:
ffmpeg -i input.mp4 -ss 120 -t 90 -vcodec copy -acodec copy output.mp4
It works but the output video is jerky/choppy, i.e. not ...
- 46k
0
votes
1
answer
333
views
What is the purpose of the split filter in FFMpeg? [closed]
In complex filters specifically, is there a situation where it is necessary to use the split filter, rather than use the same input multiple times?
For example, consider the following FFmpeg command:
...
0
votes
0
answers
46
views
Android FFmpeg export of the Video in SurfaceView with Pinch/Scale/Zoom/Bg Color Operation
I'm working on a feature in which I need to perform some actions on the selected video from the gallery and then upload it on the Backend server, on this selected video I can pinch it to scale up/down/...
- 23
0
votes
1
answer
408
views
How to extract a frame from an INSV format 360 video using Python
I have a 360 video captured with an Insta360 X3, which is in the INSV format. I would like to extract a frame from this video using Python, FFmpeg, or any other suitable tool, without using Insta360 ...
2
votes
0
answers
68
views
FFMPEG in Android Kotlin - processed video should have specific resolution
I'm recording video from both the front and back cameras and I get a PIP video and a horizontal stacked video. I need to merge both videos after that. The problem with merging is that it requires both ...
- 259
0
votes
0
answers
19
views
ffmpeg not recording frames
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 ...
RCam
0
votes
0
answers
44
views
drawtext with ffmpeg python
I am trying to add a text to a video using ffmpeg and python.
I tried to do this in the following ways, but it didn't work.
first
(
ffmpeg
.input(in_video)
.filter('drawtext'...
0
votes
1
answer
108
views
ffmpeg: PNGs to mp4 video is strange scaled quicktime
I am trying to create a video from multiple PNG files.
The files contain an animation of a line.
However, the output MP4 video looks really strange, as if the content is stretched or scaled.
Below, ...
- 46
0
votes
0
answers
68
views
Merge videos on computer automatically
I have some videos regularly downloaded to my computer, these are short videos, around 10-15 seconds each. I usually use https://online-video-cutter.com/merge-videos to merge them, and it serves my ...
- 446
0
votes
1
answer
154
views
Flutter: How to use "ffmpeg_kit_flutter" to merge videos?
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....
0
votes
1
answer
58
views
(C_UDP Socket Programming) How can I convert binary file to video format?
I am practicing UDP socket programming. My code's functions are below.
Connect Server-Client and send "hello" message each other (it is working).
Then Server is sending video file to client ...
- 13
0
votes
1
answer
114
views
How to create video from a stream webcam and canvas?
I am trying to generate a video on browser from different cut:
Slide: stream from canvas
Video: stream from webcam
I just want to allow user to download the video edit with
slide1 + video1 + slide2 + ...
- 2,801
0
votes
1
answer
135
views
ffmpeg merge audio and video from ytdl-core, outputs an mp4 with no time (no seekable)
i'm trying to merge video and audio from ytdl-core with ffmpeg and export it to user in mp4. The output video apears without time (inifit duration) and can not seek or navigate to another point of the ...
- 1
0
votes
0
answers
23
views
Try to concatenate videos using FFmpeg Package. My videos concatenate correctly but those that i record from fornt camera rotate 90' in concatenate
Here is my code where I pass a list of image paths that concatenate. I am facing an issue with the front camera video. When concatenated completely some videos rotate 90 degrees.
Future<void> ...
- 21
0
votes
0
answers
113
views
How to read an sdp file using python
I am runnig following command to forward webcam using ffmpeg to a remote IP over a cellular network
ffmpeg -i /dev/video0 -c:v libx264 -crf 35 -preset ultrafast -vf "eq=gamma=0.8" -f rtp &...
- 135
0
votes
0
answers
344
views
How to extract the audio stream from an mp4 video file?
Basically I am using this python code but when I put the extracted audio stream below the video stream with the same audio, they don't line up.
One interesting detail is when I used the video editor ...
- 330k
0
votes
0
answers
223
views
Python OpenCV VideoCapture Color Differs from ffmpeg and Other Media Players
I’m working on video processing in Python and have noticed a slight color difference when using cv2.VideoCapture to read videos compared to other media players.
I then attempted to read the video ...
- 71
-1
votes
1
answer
254
views
When usg ffmpeg to convert from .mp4 to .avi, how do I get the .avi files to contain the correct (trimmed) frames from the .mp4?
I am using ffmpeg to convert a batch of .mp4 videos to the .avi format from the command line. The .mp4 videos are all trimmed videos that are sub-videos of a longer video. I have basically segmented ...
- 151
0
votes
1
answer
499
views
Using FFMPEG and PHP to encode HLS video on the fly
I'm re-encoding a MP4 video to HLS using FFMPEG with PHP. I'm trying to then directly serve to the output to a HTML page's <video> tag. The following script (encode.php) encodes the video as I ...
- 9
0
votes
0
answers
69
views
Emulate YUV420 stream for OpenCV
I'm working on a project that will treat the images coming from a camera in YUV420 format connected by ethernet.
During the development, we can't have constant access to the camera so I wanted to ...
- 1,433
1
vote
1
answer
250
views
gstreamer cant demux a .ts video but ffmpeg can. How can I fix the error?
I have a .ts video that when I run through a basic gstreamer pipeline I get an error that it can't demux the video.
comand:
gst-launch-1.0 filesrc location="/videos/my_video.ts" ! tsdemux ! ...
- 179
0
votes
0
answers
43
views
How to create video by stitching together images (.png) where the serial on each image file increases by 6
I am trying to create a video (preferably mp4) from a series of png images. However, the name of each image file increases by 6 every frame. For example, I would have depthframe_0000 as the first ...
-1
votes
1
answer
26
views
Cutting sections with -ss and -t is not frame accurate
I'm using ffmpeg 6.0 to extract small sections from longer videos. According to the doc i can use the -ss option to specify the start time and the -t option to specify the duration and this should ...
- 1,978
-2
votes
1
answer
158
views
Converting Multiple Videos from S3 into GIFs with Random Frames using Python and Lambda
I have a collection of videos stored in an S3 bucket, and I'm looking to automate the process of converting these videos into GIFs using Python and Lambda. Each resulting GIF should be precisely 10 ...
- 223
-2
votes
1
answer
496
views
Can't convert video with cuda after updating ffmpeg
i've used this command sometimes to convert 4k video into 1080p without problem with tool "ffmpeg batch" and ffmpeg 5.1? "2022-08-10-git-8fc7f0fdec-full_build-www.gyan.dev Copyright (c) ...
- 1
0
votes
0
answers
28
views
Merge (concat) all video file present in '43. DP (Part1)' and put it into '43. DP (Part1)' and give name merged (concat) file to folder name
I have parent folder alpha part 3 which contain child folder 43. DP (Part1), 44. DP (Part2), 45. DP (Part3).
I want to merge (concat) all video file present in 43. DP (Part1) and put it into 43. DP (...
- 11
-2
votes
1
answer
1k
views
FFMPEG fast quality video encoding without quality loss & less storage occupancy (maybe using GPU)
I Have written a go code but it is slow and the video compression rate is also not that impressive. I am new to FFMPEG and my entire project depends on FFMPEG. I have tried different video codecs like ...
0
votes
0
answers
17
views
NodeJS FFMPEG : Issues combining the crops and the trims
I'm building a video editor where I can trim multiple clips and adjust the videos by cropping each clip. For example the first clip is centered in the middle and the second clip would be centered at ...
- 1
0
votes
0
answers
109
views
Trouble downloading a youtube playlist and converting to mp4 with audio/video
I am having difficulty with a side project I am working on. The goal of the program is to be able to do a few functions with a youtube video or playlist link.
download a youtube video and audio and ...
0
votes
0
answers
30
views
Create video with size based on image and place a video somewhere with an offset
I am trying out FFMPEG and I am unsure how hard it is to do what I want. I have some device frames and I want to play a video inside the frame. For example, this is a device frame:
Now I want to play ...
- 383
1
vote
1
answer
86
views
C# 16-bit grayscale Bitmap array to video
I have some scientific data that comes in 16-bit grayscale and is unsigned. I need the wide range of grayscale values and C# already supports the format for Bitmap structure using PixelFormat....
- 1,815
0
votes
1
answer
199
views
Extend Frame Size and Re-Encoding Video to be Blu-Ray Compliant with ffmpeg and tsMuxer
I have a media file with the following video stream:
Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt709), 1440x1080 [SAR 1:1 DAR 4:3], 23.98 fps, 23.98 tbr, 1k tbn (default)
I am attempting to ...
- 89
-1
votes
1
answer
117
views
How to record frames with ffmpeg and finish the recording
In the following code, i trying to create a class to record frames from an IP camera (RTSP), save frames on a .avi file and finish the record, but, when i kill the operation, the video file may be ...
2
votes
0
answers
146
views
Can you reuse an init.mp4 file for two separate FMP4 videos if they are encoded to the same specification?
I have two separate FMP4 (Fragmented MP4) videos that I need to encode. Both videos will be encoded to the same specifications, including resolution, bitrate, and codec settings. I understand that ...
- 65
0
votes
0
answers
72
views
Saving monochrome video in nvenc lossless
I have a very high res, high frame rate video from a monochrome camera (industrial) - at the moment it is saving all three RGB channels, which means before compression the 1:38s video is 9GB+
I'm ...
- 23
1
vote
0
answers
73
views
How to extract good quality frame in pixel format from live mpeg-ts stream?
I use the command below to stream my ts file for my programe:
ffmpeg -re -i independent_frame.ts -f mpegts udp://127.0.0.1:10002
Below is the code of my programe, I'm trying to extract each frame in ...
- 11
0
votes
1
answer
210
views
TypeError: __init__() missing 2 required positional arguments: 'stdout' and 'stderr'
I encountered the following error while running a program extract_frame_and_wav_multiprocess.py, which is designed to extract audio and frames from the videos in dataset MSRVTT.
Here is the error ...
- 39