1er juin

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

• 09:01
  Writing a video frame by frame using ffmpeg - Chris Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write a video frame by frame using ffmpeg as explained here: http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/ However, I am always getting an OSError: [Errno 22] Invalid argument. I am on Windows 7 and using Python 3.4. Here is the code: import subprocess as sp import numpy as np import time ffmpeg_bin = r'C:\\path\\to\\ffmpeg\\ffmpeg.exe' command = [ffmpeg_bin, '-y', # (optional) overwrite output file if it exists '-f', 'rawvideo',  (...) -- http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/
• 04:41
  What is the purpose of the split filter in FFMpeg? - TheOrbitHeart Newest 'ffmpeg' Questions - Stack Overflow
  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: ffmpeg -i input.mp4 -filter_complex \\ "[0:v]hflip[out1]; \\ [0:v]boxblur=10[blurred]; \\ [out1][blurred]hstack[out]" \\ -map "[out]" output.mp4 It seems to work perfectly fine, But I saw some tutorials consistently using "split" in situations like this, where the input is split before any other filters are applied, making me wonder if there are unintended (...)

31 mai

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

• 23:08
  Using FFMPEG: How to do a Scene Change Detection? with timecode? - Mozart Newest 'ffmpeg' Questions - Stack Overflow
  Based on this article it seems that it is possible to use FFMPEG to detect scene change in videos: http://www.luckydinosaur.com/u/ffmpeg-scene-change-detector Now I have a video that displays a book text and when the text (word or sentence) is spoken it gets highlighted. Something like this audio book: https://youtu.be/lA7L6ZNVKjc I need to know the timestamp when the text gets highlighted (hence scene change), this will allow me to add timestamp tags on my youtube video, so it becomes easier for listeners to navigate through the audiobook. What is (...)
• 21:02
  AttributeError: module 'librosa' has no attribute 'output' - Aditya Kumar Newest 'ffmpeg' Questions - Stack Overflow
  I am using librosa 0.6 in anaconda and i have also installed ffmpeg but i am still getting this error the code is a = np.exp(spectrum) - 1 p = 2 * np.pi * np.random.random_sample(spectrum.shape) - np.pi for i in range(50): S = a * np.exp(1j * p) x = librosa.istft(S) p = np.angle(librosa.stft(x, N_FFT)) librosa.output.write_wav(outfile, x, sr)
• 13:28
  How should I add watermark to a video Using ReactJS - basit khan Newest 'ffmpeg' Questions - Stack Overflow
  I want to add a watermark to a video and then upload it to firebase , So if i Get the video from firebase it should be shown with watermark and also can be downlowded with watermark appended. Didn't find any solution yet for this
• 13:27
  Android FFmpeg export of the Video in SurfaceView with Pinch/Scale/Zoom/Bg Color Operation - CoderDev Newest 'ffmpeg' Questions - Stack Overflow
  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/zoom in/out and place it anywhere on the screen (even out side the screen), just like the Instagram app. I can apply a background color which will be applied to the whole space of the outer of the video frame. After all the above changes I'm exporting the changes to the output video that will contain all the changes that I've mentioned above. I'm using the FFMpeg (...)
• 12:48
  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 (...)
• 09:58
  How to extract a frame from an INSV format 360 video using Python - Kalpesh Shinde Newest 'ffmpeg' Questions - Stack Overflow
  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 Studio to export the video to MP4 first. Here is what I have tried so far: FFmpeg: I attempted to use FFmpeg to directly convert the INSV file to images, but I encountered errors, possibly due to the proprietary nature of the INSV format. ffmpeg -i input.insv -vf "select=eq(n,0)" -q:v 3 output.jpg This command did not work as expected and produced an error. Python (...)
• 06:40
  Can I set rotation field for a video stream with FFmpeg? - Alexander Newest 'ffmpeg' Questions - Stack Overflow
  I have a video file. I open it with MediaInfo utility and I can see a video stream in this file having attribute Rotation 90 (along with other attributes such as CodecID, bitrate etc). Now I have another video file which does not have that attribute Rotation 90, it does not have the Rotation attribute at all. Can I use ffmpeg.exe so that it produces output file with Rotation 90 attribute added and with no other changes? I don't really want to do any transform, just want to set the Rotation attribute. I've tried the -metadata option to no (...)
• 04:46
  FFMPEG in Android Kotlin - processed video should have specific resolution - Utsav Newest 'ffmpeg' Questions - Stack Overflow
  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 the videos (PIP and stacked) to have the same resolution and aspect ratio. This is not the case. So the FFMPEG command being executed in code to generate both these videos needs to be modified to make the resolution and aspect ratio the same. //app -> build.gradle implementation "com.writingminds:FFmpegAndroid:0.3.2" private fun connectFfmPeg() val overlayX = (...)

30 mai

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

• 22:18
  FFMPEG Concatenating videos with same 25fps results in output file with 3.554fps - Kendra Broom Newest 'ffmpeg' Questions - Stack Overflow
  I created an AWS Lambda function in node.js 18 that is using a static, ver 7 build of FFmpeg located in a lambda layer. Unfortunately it's just the ffmpeg build and doesn't include ffprobe. I have an mp4 audio file in one S3 bucket and a wav audio file in a second S3 bucket. I'm uploading the output file to a third S3 bucket. Specs on the files (please let me know if any more info is needed) Audio: wav, 13kbps, aac (LC), 6:28 duration Video: mp4, 1280x720 resolution, 25 frame rate, h264 codec, 3:27 duration Goal: Create blank video to (...)
• 21:54
  ffmpeg - Seek to absolute time stamp in MPEG DASH segment - iBent Newest 'ffmpeg' Questions - Stack Overflow
  I need to extract short audio segments at specific time stamps from specific dash segments. I tried the following: ffmpeg -ss 00:10:00 -i segment_x.m4s -t 10 out.mp3 ss seeks relative to the segment's start time however, and not absolutely. That absolute time data is there however as ffmpeg prints it during the conversation like this: Duration: 00:10:14.01, start: 595.018667, bitrate: 7 kb/s How can I make ffmpeg extract the audio from exactly 00:10:00 to (...)
• 20:39
  Issue with adding FFMPEG to macOS path to convert mp3 to WAV in Python - AndrewLittle1 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use a simple program to convert a .MP3 file to a .WAV file in python: from os import path from pydub import AudioSegment src = "test1.mp3" dst = "test1.wav" # convert wav to mp3 sound = AudioSegment.from_mp3(src) sound.export(dst, format="wav") When I try to run the program in an IDE, I am getting a FileNotFoundError this is what the StackTrace looks like: RuntimeWarning: Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work warn("Couldn't find ffprobe or avprobe - defaulting to (...)
• 16:50
  ffmpeg exited with code 1: Input/output error - Alessandro1918 Newest 'ffmpeg' Questions - Stack Overflow
  On my backend Node server, I am trying to read a stream from an online radio station, and save the audio as a file in my computer. As streams don't have start/end, I'm choosing to record an arbitrary value of 5 seconds. For this problem, I'm using the fluent-ffmpeg npm package for ffmpeg wrapper. Also, the ⓐffmpeg-installer/ffmpeg npm package to point to the directory of my local ffmpeg binary. As stream input, I'm reading from 89 FM - A Rádio Rock, a radio from São Paulo, BR, with the stream available at (...) -- fluent-ffmpeg npm package, @ffmpeg-installer/ffmpeg npm package, 89 FM - A Rádio Rock, http://26593.live.streamtheworld.com/RADIO_89FMAAC.aac
• 16:36
  How to process a video to mp4 with ffmpeg for quality and compatibility? - Luis A. Florit Newest 'ffmpeg' Questions - Stack Overflow
  I am beginning to be more serious about video. I am processing my videos with ffmpeg in a fully updated Linux into mp4 to use it in HTML5 directly. Now, I have old AVI videos that I want to convert to mp4 with ffmpeg for use with HTML5. In particular, I have this one: http://luis.impa.br/photo/1101_aves_ce/caneleiro-de-chapeu-preto_femea_Quixada-CE-110126-E_05662+7a.avi (I know, terrible quality... sorry). According to ffprobe: Duration: 00:01:35.30, start: 0.000000, bitrate: 1284 kb/s Stream #0:0: Video: mpeg4 (Simple Profile) (DX50 / 0x30355844), yuv420p, (...) -- http://luis.impa.br/photo/1101_aves_ce/caneleiro-de-chapeu-preto_femea_Quixada-CE-110126-E_05662+7a.avi
• 15:07
  FFMPEG Streaming using RTMP - desto Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a stream using ffmpeg to send a video to a Red5 Server. I've already managed to do this using this command: ffmpeg -re -y -i "Videos\\Video1.mp4" -c:v libx264 -b:v 600k -r 25 -s 640x360 -t 40 -vf yadif -b:a 64k -ac 1 -ar 44100 -f flv "rtmp://192.168.0.12/live/videostream" My problem is, when ffmpeg finishes encoding the video, it stops the stream, and thus cuts the video short for 5-10 seconds (for short videos), but this gets worse on larger videos. Is there a way to stop this behavior? I was trying to add a blank 10 (...)
• 14:47
  Convert 2 channel mp4 to each mono wav file using FFMPEG or Python code - Harish Alwala Newest 'ffmpeg' Questions - Stack Overflow
  I am new to audio files and its codecs. I would like to convert a 2 channel mp4 file to a single mono wav files. My understanding is a when I say 2 channel, it stores speech coming from each microphone in a separate channel. And when I split the channels to each individual mono wav files, I get speech of each microphone. My intension here is to get the speech from each channel and convert them to text. This way I can set the name of the speaker based on channel. I tried with ffmpeg and python code as well, unfortunately I get two files with same content. Looking (...) -- ,
• 14:19
  how to generate video thumbnail in node.js? - paynestrike Newest 'ffmpeg' Questions - Stack Overflow
  I am building an app with node.js, I successfully uploaded the video, but I need to generate a video thumbnail for it. Currently I use node exec to execute a system command of ffmpeg to make the thumbnail. exec("C:/ffmpeg/bin/ffmpeg -i Video/" + Name + " -ss 00:01:00.00 -r 1 -an -vframes 1 -f mjpeg Video/" + Name + ".jpg") This code is coming from a tutorial from http://net.tutsplus.com/tutorials/javascript-ajax/how-to-create-a-resumable-video-uploade-in-node-js/ the code above did generate a jpg file but it's not a thumbnail but (...) -- http://net.tutsplus.com/tutorials/javascript-ajax/how-to-create-a-resumable-video-uploade-in-node-js/