1 October

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

• 01:48
  Can I use ffmpeg to resize the timeline of a video file? - MrNobody Newest 'ffmpeg' Questions - Stack Overflow
  I need to stretch the video to fit a specific time. Is it possible with ffmpeg or do you guys know any other tool that could do the the work?
• 01:25
  When streaming with ffmpeg, insert audio only if the source file/stream has no audio - Dan Pisarski Newest 'ffmpeg' Questions - Stack Overflow
  I would like to use the same command, regardless of if my source file, or source stream, has an audio track or has no track at all. I then want ffmpeg to transcode the audio - using either the audio source (if present), or silence (which I see various various ffmpeg audio filters can generate) only if no source audio track is present. Could someone give an example or some pointers on the right command for this? Some way to do this with map or similar switches? Note here I truly mean no audio track at all, versus say detecting silence in the source audio track. It is a key to be (...)
• 01:19
  How to make mpv more compatible with ffmpeg filters like minterpolate? - F usedEmacs -con fused Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg filter minterpolate (motion interpolation) does not work in MPV. (Nevertheless the file then is played normally without the minterpolate). (I researched using search engines and throughout documentation and troubleshooted to make a use of opengl and generally tried everything apart from asking for help and learning to understand more in the source code and I'm not a programmer)… gpu-context=angle --gpu-api=opengl also does not make opengl work. (I'm guessing opengl could help from seeing its use in the documentations).  (...) -- http://ffmpeg.org/ffmpeg-filters.html

30 September

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

• 21:52
  Fluent FFMPEG complex filter to split file into multiple outputs - lowcrawler Newest 'ffmpeg' Questions - Stack Overflow
  It appears possible to have multiple outputs from a single FFMPEG command: ffmpeg overlay on multiple outputs I'd like to know how to do this in FFMPEG. I'm specifically using the complexFilter option in an attempt to split the video into 4 different sizes and place an overlay, and then save the 4 resulting files. The code is my attempt to simply split the video into 4 and save it. I get the Error: ffmpeg exited with code 1: Filter split:output3 has an unconnected output error. I'm unsure how to connect the output to a file in fluent-ffmpeg. let ffmpegCommand (...)
• 21:42
  Split video into images with ffmpeg-python - sgt pepper Newest 'ffmpeg' Questions - Stack Overflow
  As far as I understand ffmpeg-python is main package in Python to operate ffmpeg directly. Now I want to take a video and save it's frames as separate files at some fps. There are plenty of command line ways to do it, e.g. ffmpeg -i video.mp4 -vf fps=1 img/output%06d.png described here But I want to do it in Python. Also there are solutions [1] [2] that use Python's subprocess to call ffmpeg CLI, but it looks dirty for me. Is there any way to to make it using (...) -- ffmpeg-python, described here, [1], [2]
• 20:51
  How can I delete a file in FOR loop in batch scripting after another command? - Andrew Anderson Newest 'ffmpeg' Questions - Stack Overflow
  I compress a video with FFMPEG by means of a batch scripting one-liner with a FOR LOOP. After compressing I want to remove the original file. This code perfectly makes the compressing job, but the original file is not being removed: for %%i in (*.mp4) do ffmpeg -i "%%i" -vcodec libx265 -crf 28 "%%~ni"-small.mp4&&del "%%i" pause What have I missed? By the way, this is a near to perfect compression ratio for any kinds of educational videos, tutorials, etc. which have occupied your hard (...)
• 19:39
  Record ip camera streaming with two login authentication - oxorio Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record a stream with ffmpeg, VLC or OBS that before you view the stream player you need to login with a microsoft account, the URL is something like this https://yourwebsite.msappproxy.net/Camera/player.html?stats=1 And after you login you have to insert a username and password to watch the camera you want to see. I've got the .m3u8 and tried to play it on VLC but doesn't start the streaming, searching i found that you can add the credentials to the stream link but this doesn't work (...)
• 19:29
  RTMP proxy to crop original video and send it to another RTMP server - Nicola Peluchetti Newest 'ffmpeg' Questions - Stack Overflow
  I need to crop the video from an RTMP stream and send it to another RTMP server which always change. My understanding is that I should use nginx-proxy and ffmpeg, can anybody help me on how to set it up? I suppose that i need to send the stream to an endpoint like /stream/:stream-key/:next-server-ip process the stream with ffmpeg and then send it to the :next-server-ip, what language should I use in the backend for this?
• 16:59
  Video with music taking long time - Konduri Sai Aditya Newest 'ffmpeg' Questions - Stack Overflow
  Hi I am rendering video with filters and adding audio at the end. But while running it is taking a long time and rendering continuously. Can anyone help me where I am wrong? below is the command ffmpeg -i test.png -i test.mp4 -i test.mp3 -y -filter_complex "[1:v]scale=1422:800[scale1],[scale1]rotate=0:c=blackⓐ0:ow=rotw(0):oh=roth(0)[rotate0],[0:v][rotate0]overlay=258.04:107.71[mediaoverlayout0],color=blackⓐ0:451x137[c1],[c1]setsar=1,drawtext=fontfile='/Windows/fonts/Peddana-Regular.ttf':text='ADITYA':fontsize=121.199:fontcolor=#1e8bc3:line_spacing=16.91,rotate=0:ow=rot
• 16:59
  Sending Pictures over Network with Unity C# - TobiGG B. Newest 'ffmpeg' Questions - Stack Overflow
  I am currently working with the HoloLens and thus Unity. The idea is to make a webcam Livestream with as little delay as possible to an instance of FFmpeg on a different device for encoding. However, I run into some issues. My first problem is the Conversion from a Color32 Array to a Byte Array. It creates a huge amount of bandwidth, especially when I am trying to record and stream with 30fps and a 1280x720 resolution. Here is some code: IEnumerator Init() webCam = new WebCamTexture(1280, 720, 30); webCam.Play(); image.texture = webCam;  (...)
• 15:48
  RN CameraRoll gives uri as ph: // - Roman Adigezalov Newest 'ffmpeg' Questions - Stack Overflow
  Faced such a problem, I get a video using CameraRoll in order to later transfer this file to FFMpeg, but the problem arises in the fact that the path to the file is on ios using the ph protocol. How to be in this situation? How do I get real access to the file?
• 15:41
  How to get better quality converting MP4 to WMV with ffmpeg? - Edward Tanguay Newest 'ffmpeg' Questions - Stack Overflow
  I am converting MP4 files to WMV with these two rescaling commands: ffmpeg -i test.mp4 -y -vf scale=-1:360 test1.wmv ffmpeg -i test.mp4 -y -vf scale=-1:720 test2.wmv I've also tried: ffmpeg -g 1 -b 16000k -i test1.mp4 test1.wmv However, the .wmv files that are produced are "blocky and grainy" as you can see here in a small section of a video screenshot: These are the sizes: test.mp4 - 106 MB test1.wmv - 6 MB test2.wmv - 16 MB How can I increase the quality/size of the resulting (...)
• 15:10
  ffmpeg : sws_scale not able to convert image from YUV to RGB - Abhinav Singh Newest 'ffmpeg' Questions - Stack Overflow
  I m trying to convert my image from YUV420P to RGB24 below is my code for extracting the frame and decoding it, frame extracting while(av_read_frame(avc,avpacket) == 0) if(avpacket->stream_index == videoStream) int res = avcodec_send_packet(avctx,avpacket); if(res == AVERROR(EAGAIN)) continue; else if(respix_fmt,AV_PIX_FMT_RGB24); displayImage(avframeRGB); Function convertImage void convertImage(AVFrame** frame, AVPixelFormat srcFmt, AVPixelFormat destFmt) AVFrame* tframe = *frame; struct (...)
• 14:57
  Audio in ffmpeg - Konduri Sai Aditya Newest 'ffmpeg' Questions - Stack Overflow
  I need to add audio as an input to below command, How can I achieve it ffmpeg -i test.png -i test.mp4 -y -filter_complex "[1:v]scale=1422:800[scale1],[scale1]rotate=0:c=blackⓐ0:ow=rotw(0):oh=roth(0)[rotate0],[0:v][rotate0]overlay=258.04:107.71[mediaoverlayout0],color=blackⓐ0:451x137[c1],[c1]setsar=1,drawtext=fontfile='/Windows/fonts/Peddana-Regular.ttf':text='ADITYA':fontsize=121.19999999999999:fontcolor=#1e8bc3:line_spacing=16.91,rotate=0:ow=rotw(0):oh=roth(0):c=blackⓐ0[rottext1],[mediaoverlayout0][rottext1]overlay=x=544.63:y=263.076:shortest=1" -pix_fmt yuv420p (...)
• 14:22
  Is celery a good choice for long running tasks? - jasoos Newest 'ffmpeg' Questions - Stack Overflow
  We are using a combination of django, rabbitmq, celery and ffmpeg to read camera streams and break them into images to be stored into filesystem. This setup works 24x7. Now, for each camera stream we are creating a separate task and each will theoretically run for indefinite period. If a stream goes down, we wait for n number of frames, create an exception and in the exception handler, after creating a delay of 1 min using time.sleep we rerun the ffmpeg process. My questions are, Is this a right approach? Should we use celery for reading streams? Is celery the right (...)
• 13:01
  MobileFFMPEG Output file #0 does not contain any stream - Alhaj Newest 'ffmpeg' Questions - Stack Overflow
  I am using implementation 'com.arthenica:mobile-ffmpeg-full:4.4' I just want o crop audio file to 10 second to 20 second ''' fun cropAudio(input :String) val newFileName = UUID.randomUUID().toString() val location: String = getBatchDirectoryName()!! val output: String = location + "/" + newFileName + ".mp3" val temp=" -i $input -ss 60 -to 70 $output" Log.e("alhaj", " a $s") FFmpeg.execute(temp, object : ExecuteCallback fun onSuccess(message: String?)  (...)
• 12:18
  ffmpeg video trim out of memory and crashing - mdkamrul Newest 'ffmpeg' Questions - Stack Overflow
  I used ffmpeg for video trim, but this crashing page and showing out of memory. here is my command for trim ["-i", "video.mp4", "-ss", "00:00", "-c", "copy", "-to", "01:26", "output.mp4"] please help me for this
• 12:06
  how to create a m3u8 file in php [duplicate] - Rangga 21 Newest 'ffmpeg' Questions - Stack Overflow
  how do I make it like this in php, whether using ffmpeg or something else I need a reference to make this
• 11:37
  How to set fps in python decord library? - Sathish Kumar Newest 'ffmpeg' Questions - Stack Overflow
  package link : https://github.com/dmlc/decord I am using decord to extract frames and it does a good job, by default it uses video fps. Lets say i need to extract frame at 0.2 fps. example : i have a video at 48 seconds and its fps is 30. when i extract i get 1440 frames But, I need to specify the fps like 0.2 so , the output should be 10 frames. PS. In ffmpeg, we can specify the fps while extracting. I am asking in the same way. My code: from decord import VideoReader from matplotlib import pyplot as plt vr = (...) -- https://github.com/dmlc/decord
• 11:33
  ffmpeg video trim out of memory and cashing - mdkamrul Newest 'ffmpeg' Questions - Stack Overflow
  I used ffmpeg for video trim, but this crashing page and showing out of memory. here is my command for trim ["-i", "video.mp4", "-ss", "00:00", "-c", "copy", "-to", "01:26", "output.mp4"] please help me for this
• 10:26
  Java open CV hangs on VideoCapture for file if openCV is loaded with nu.pattern.OpenCV.loadShared(); - Ilya Yevlampiev Newest 'ffmpeg' Questions - Stack Overflow
  I have a sample code from https://ratiler.wordpress.com/2014/09/08/detection-de-mouvement-avec-javacv/ with small difference in loading the open cv library in the static block using nu.pattern.OpenCV.loadShared(); : import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import org.opencv.core.CvType; import org.opencv.core.Mat; import (...) -- https://ratiler.wordpress.com/2014/09/08/detection-de-mouvement-avec-javacv/
• 10:04
  FFMPEG Extract subtitles at webvtt format while keep position on the screen - Maxou Newest 'ffmpeg' Questions - Stack Overflow
  i'm working on a project where I need to extract subtitles from video files and convert it to WEBVTT format. But when I extract and convert it with FFMPEG my webvtt files doesn't keep the position. What I want 00:00:11.000 --> 00:00:13.000 align:start What I get 00:00:11.000 --> 00:00:13.000 While when I test to extract at .ass files the position of the subtitles is keep. To extract I use this command ffmpeg -i filename -map 0:s:0 -muxdelay 0 -f webvtt subtitles.vtt Thanks in (...)
• 10:00
  How can I pipe output of ffmpeg to ffplay in java? - guidop21 Newest 'ffmpeg' Questions - Stack Overflow
  currently i have created a java project that allows me to use ffmpeg to split a live video coming from a webcam and fragment it into many 60 second video clips. These are the main methods: ⓐOverride public boolean startRecording(String fileName, Integer clipPrefix, String folderClipName) final String methodName = "startRecording(fileName, folderClipPath)"; this.startLog(methodName, fileName, folderClipName); try File folder = new File(folderClipName + System.getProperty("file.separator") +fileName); if( !folder.exists() )  (...)
• 05:47
  Express - FFMPEG: Serve transcoded video instead of static video file - No stupid questions Newest 'ffmpeg' Questions - Stack Overflow
  I am creating a website to host videos downloaded on my computer online. However, many of these videos are not in a web friendly format (like .mkv or .flv). It is not an option to convert these files on the disk and then serve them as static files, converting needs to be done live by the server. I want to transcode these videos with ffmpeg to a web friendly format like webm. So far, I have been able to somewhat successfully transcode a video and serve it: import express from 'express'; import cors from 'cors'; import ffmpeg from (...)
• 05:39
  uwp app throw error when install from package but works fine in any mode when run directly launching from visual studio - Abhishek Sharma Newest 'ffmpeg' Questions - Stack Overflow
  I have created an app wrapping FFmpeg in uwp now for the requirement I have all the major dll of FFmpeg and then set to content and copy always in property now when I launch the app installed from the visual studio in any mode weather release, debug, x86,x64 it works fine but as I created a package and then install the app and run it, it throws an error where it says that dll not found not directly but says file not found which is because of dll because I face that problem in debug mode before and it's because of dll not available to uwp you can look at the project here: (...) -- https://github.com/AbhiSharma9350/Winfftool
• 05:00
  FFmpeg.AutoGen on UWP platform - Dimitris Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to use the FFmpeg.AutoGen packages on UWP (Universal Windows Platform) project?
• 02:59
  Decoding an MKA audio file into raw data of the pcm_alaw type (MKA Audio to pcm_alaw) - bbdd Newest 'ffmpeg' Questions - Stack Overflow
  My task is to open an existing audio file with the mka extension (Matroska container) and extract the raw audio data. If the audio data is different from pcm_alaw, then convert it to pcm_alaw before saving it to another file ( or buffer). This example shows only an example of extracting raw data from an mp2 file. I do not know how to do this with the mka container. I would like to have something like this: UPD I found an option to save audio data in the format in which it was recorded in the audio file. An example is shown below. PS. This is only a test version and most (...) -- Matroska, This
• 01:39
  Linking against ffmpeg libs on Rust gives `vdp_device_create_x11` (libvdpau-dev missing?) - Guerlando OCs Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to link against ffmpeg libraries, in rust, and getting as the only error: undefined reference to `vdp_device_create_x11' Here's the libs linked: fn main() println!("cargo:rerun-if-changed=build.rs"); println!("cargo:rustc-link-lib=static=z"); println!("cargo:rustc-link-lib=dylib=dl"); println!("cargo:rustc-link-lib=static=X11"); println!("cargo:rustc-link-lib=dylib=vdpau"); println!("cargo:rustc-link-lib=dylib=va"); println!("cargo:rustc-link-lib=dylib=va-drm");  (...) -- https://ffmpeg.org/doxygen/trunk/hwcontext__vdpau_8c_source.html

29 September

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

• 19:38
  How to compare two images using ffmpeg? [closed] - user3559780 Newest 'ffmpeg' Questions - Stack Overflow
  I am newbie in ffmpeg and want to compare 2 images (image1 and image2) and find out the percentage similarity between them with the help of ffmpeg. If the percentage is above certain threshold level, I will print the alert message. Is there any way using ffmpeg? image1 link https://ibb.co/dPQBJG9 image 2 link https://ibb.co/tP2gphs -- https://ibb.co/dPQBJG9, https://ibb.co/tP2gphs
• 23:28
  how to extract audio from video using ffmpeg c++ - daenerys Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write c++ code on how to extract audio from mp4 format file. I have compiled the examples in ffmpeg library and tried to run the demuxing_decoding.c file. The problem is that on running the code, it starts to decode way more than the actual file size and decodes wrong codec format (the decoded files cant be run). here is the demuxing_decoding.c that I am trying to run: #include #include #include #include #include #include #include #include #define INBUF_SIZE 4096 #define AUDIO_INBUF_SIZE (...)
• 22:44
  How to extract H264 video from RTP packets in a .pcap file - Ke Chen Newest 'ffmpeg' Questions - Stack Overflow
  I am using FFmpeg to transmit RTP stream of a video and then capture and save all packets using WireShark into a .pcap file. The FFmpeg command I am using is: ffmpeg -i video.264 -r 25 -video_size 352x288 -c:v libx264 -f rtp rtp://127.0.0.1:1234 Now, I want to convert back to video using this pcap file. Can FFmpeg do this? or Is there other tools available? Also, I want to test how packet loss affects the quality of video. So I need to drop several packets in the pcap and then convert back to video to see the effect. Can I get the video back just use the rest of the (...)
• 22:26
  How to record an HTML animation and save it as a video, in an automated manner in the backend - frizurd Newest 'ffmpeg' Questions - Stack Overflow
  I need to record a webpage and save it as a video, in an automated manner, without human interaction. I am creating a NodeJS app that generates MP4 videos on the request of the user. The user provides an MP3 file, the app generates animated waveforms for the sound file on top of an illustration. What I came up with so far is a system that opens a generated web page in the backend, plays the audio file, and shows audio visualization for the audio file on an HTML canvas element. On top of another canvas with mainly static components, such as images, that do not animate. (...) -- ccapture.js
• 21:51
  Create different qaulities for my manifest with only mp4box - Ted Bed Newest 'ffmpeg' Questions - Stack Overflow
  I asked a question on slack on why the quality and bitrate of my dash video wasn't changing and I got this response: You only have one quality in your manifest. there is no way for the player to choose a different one So how can I create different "qualities"? I have a mp4box command like: MP4Box -dash 2000 -profile dashavc264:live -bs-switching multi -url-template whatever.mp4#trackID=1:id=vid0:role=vid0 whatever.mp4#trackID=2:id=aud0:role=aud0 -out whatever.mpd Would it be possible to create different "qualities" with only mp4box or would I have to create (...)
• 21:50
  YouTube Live not working with FFMPEG - Benedikt Neumayr Newest 'ffmpeg' Questions - Stack Overflow
  EDIT: It already works. My new router seems to block rtmp traffic. I edited the firewall config and now it works! I'm trying to stream to YouTube with ffmpeg with the following command: ffmpeg -f alsa -ac 2 -i hw:0,0 -f v4l2 -s 1280x720 -r 10 -i /dev/video0 -vcodec libx264 -pix_fmt yuv420p -preset ultrafast -strict experimental -r 25 -g 20 -b:v 2500k -codec:a libmp3lame -ar 44100 -b:a 11025 -bufsize 512k -f flv rtmp://a.rtmp.youtube.com/live2/45ee-qka9-0djm-796z My ffmpeg version 2.8.11 on Linux Mint 18.2 then says: Input #0, alsa, from (...) -- https://gist.github.com/laurenarcher/4644aacef51e734d33d5
• 20:55
  FFMPEG fails while processing MOV files - Tom Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert video files to DASH format. All videos work great except MOV videos. I'm using the following command: /usr/local/bin/ffmpeg -y -i /path/to/mov/video.mov -c:v libx264 -c:a aac -bf 1 -keyint_min 25 -g 250 -sc_threshold 40 -use_timeline 1 -use_template 1 -init_seg_name 'video_init_$RepresentationID$.$ext$' -media_seg_name 'video_chunk_$RepresentationID$_$Number%05d$.$ext$' -seg_duration 10 -hls_playlist 0 -f dash -adaptation_sets -0:s -map 0 -s:v:0 854x480 -b:v:0 750k -strict -2 -threads 12 /output/path/video.mpd I get (...)
• 19:55
  Joining audio file and all frame picture to video format with Python ffmpeg - muh.widad Newest 'ffmpeg' Questions - Stack Overflow
  i have a tmp directory which contains a collection of image frames and audio files. i am using linux mint 19.3 and python3.8. in the terminal I type ffmpeg -i tmp/%d.png -vcodec png tmp/output.mov -y and ffmpeg -i tmp/output.mov -i tmp/audio.mp3 -codec copy output.mov -y then the collection of images and audio in the directory will become a complete video. that I asked when I run it in python using the syntax call(["ffmpeg", "-i", "tmp/%d.png" , "-vcodec", "png", "tmp/output.mov", "-y"],stdout=open(os.devnull, "w"), stderr=STDOUT) and call(["ffmpeg", "-i", (...)
• 18:41
  How to handle and transcode multiple streams in one VM - Andrew Alvarez Newest 'ffmpeg' Questions - Stack Overflow
  I'm using the Arut's RTMP module to transcode an rtmp stream to hls, I'd like to know if I can receive two or more streams into my ingest URL and transcode them simultaneously. my application runs an ffmpeg command like this: application myapp live on; exec ffmpeg command tyvm
• 18:06
  .bat script: loop over files and save command to variable - Rolf vd H Newest 'ffmpeg' Questions - Stack Overflow
  Gooddday, I want to shorten a folder of movies to cut the last part of it. To do that I use ffmpeg & ffprobe. The time to be cut off is 5.52 seconds. If I want to do that, first I have to get the time of the movie and then (the second command in the loop), I have to subtract the 5.52 seconds. For now I have the following but I can't get it right: mkdir outputsss for %%a in ("FOLDER\\*.mp4") do ( ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "FOLDER\\%%~na.mp4" ffmpeg -i "FOLDER\\%%~na.mp4" -t 18.6 -c copy (...)
• 17:34
  How do I use ffmpeg to put HTML text overlay in a video? [closed] - Tom Newest 'ffmpeg' Questions - Stack Overflow
  How do I use ffmpeg to put HTML text overlay in a video? I have a web page where a user can write html text with online editor tool. I want to overlay the html text to a video. What can I do? Here is a sample HTML text. Best Wishes for a joyful and prosperous New Year!
• 17:32
  GStreamer vs FFmpeg - user1129474 Newest 'ffmpeg' Questions - Stack Overflow
  I try to record a Video with the OpenCV Framework an would like to save that into an Matroska(mkv) Container together with some additional data streams. First I thought using FFmpeg is the way that. But while looking into the OpenCV Sourcecode and searching in the web I found GStreamer. Because the documentation in GStreamer is much better than the FFmpeg documentation I would prefer using this Framework. In my understanding GStreamer is primarily used for Streaming, but could also rncode and mux video data. Is there any disadvantage when using (...)
• 17:24
  FFMPEG X264 reduce bitrate for unchanging input - GroovyDotCom Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -f lavfi -i smptebars=duration=1000:size=640x360:rate=30 -preset ultrafast -vcodec libx264 -tune zerolatency -b 900k -g 1000 -f mpegts udp://127.0.0.1:1234 As can be seen when running this command, the encode size continues to grow rapidly even though: The input source never changes. It is exactly the same image again and again. The encoder has been told to insert a keyframe only once every 1000 frames Is there some configuration option I could add to change this behaviour? I can understand it would need to send an empty frame but right now it seems (...)
• 16:06
  Getting "OSError: [Errno 32] Broken pipe" while saving a numpy array using imageio.mimwrite into io.BytesIO() object - green_hunter434 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to save a numpy array (array of frames) as a video using imageio.mimwrite . Operation like this works fine - imageio.mimwrite('./temp4.mp4', frames, fps=fps, format='.mp4') But, when I try something like this - fo = io.BytesIO() imageio.mimwrite(fo, frames, fps=fps, format='.mp4') OR writer = imageio.get_writer(fo, fps=fps, format='.mp4') for im in frames: writer.append_data(imageio.imread(im)) writer.close() I get the following error (...)
• 08:47
  how to increase bitrates of video which has been created through FFMPEG library in PHP? [closed] - Raindrops Info-tech Newest 'ffmpeg' Questions - Stack Overflow
  In one of our application, we are capturing the image and then we are giving facility to record audio up to 60 seconds, now we are merging an image with audio through FFMPEG library, with help of PHP, so as a final result we are getting mp4 video having bitrates of Do we have any solution on how to increase Bit rates, actually we have one image along with 60 seconds audio only? We had explored certain ways but fails to do so. Looking forward to your kind (...)
• 15:57
  FFMPEG RTSP Replace Video Stream with Holding Slide - Optimization - CPU Related - Majickal Newest 'ffmpeg' Questions - Stack Overflow
  c:\\bin\\ffmpeg\\bin\\ffmpeg.exe -rtsp_transport tcp -i rtsp://10.0.0.xx:8554/live -framerate 30 -loop 1 -i "C:\\bin\\slides\\HoldingSlide.png" -tune zerolatency -x264opts bitrate=2500:vbv-maxrate=2500:vbv-bufsize=250 -c:v libx264 -g 30 -keyint_min 30 -crf 35 -preset superfast -pix_fmt yuv420p -s 1280x720 -c:a aac -b:v 2500k -b:a 192k -ar 24k -map 0:1 -map 1:0 -f flv $INGEST_URL The above ffmpeg code replaces the rtsp video component of the rtsp stream with a holding slide. I am seeing high CPU utilization (from the re-streaming server) when running this code and am looking for (...) --
• 15:28
  Trim video with ffmpeg is very slow - mdkamrul Newest 'ffmpeg' Questions - Stack Overflow
  I wanted to trim video with ffmpeg worker mp4 but this going very slow during the process the video here is my command for this ["-y", "-i", "video.mp4", "-ss", "00:00", "-to", "00:07", "output.mp4"] the video is trimming but with very slow and not working with mobile device showing memory allocation error. please help me for this
• 15:27
  Extract frames from video FFMPEG with frameskip and name it accordingly.\\ - jafar ali Newest 'ffmpeg' Questions - Stack Overflow
  I would like to extract every 5th frame from a video and rename it accordingly. frame_0000.jpg frame_0005.jpg frame_0010.jpg frame_0015.jpg Are there any parameters in the ffmpeg command other than the framerate and FPS to do so. Current command generates output sequentially. ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
• 12:32
  Add ffmpeg gpl to yocto - ErniBrown Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to compile a GPL/LGPL version of ffmpeg and add it to a yocto image? I always get a message about LICENSE_FLAGS_WHITELIST, but I do not want to enable the commercial licenses. In the recipe there is this line: PACKAGECONFIG[gpl] = "--enable-gpl,--disable-gpl" Is it meant to enable gpl build of ffmpeg?
• 12:28
  Adding Watermark/Text in Videos in Java - Aditya Kumar Newest 'ffmpeg' Questions - Stack Overflow
  I am looking for adding texts and watermarks in video files (in java) using the libraries. The texts/Watermark can be single line/multi-line and at different intervals. I didn't find any open source tool or java library which helps me to achieve the goal.
• 11:51
  PHP add whitespaces in string with an URL - Alberto Valerio Newest 'ffmpeg' Questions - Stack Overflow
  Problem I have a temporary url to access an object from AWS-S3 $source = "http://mybucket..."; If I do a var_dump($source) it shows me the correct URL string(407) "https://mybucket.s3.amazonaws.com/storage/..." So I try to use this url in a ffmpeg command in this way (double quotes are required in ffmpeg) $cmd = 'ffmpeg -i "' . $source . '" ... shell_exec($cmd); This do not work, and when I do a var_dump($cmd) the url shows like this (whitespace beetween https: and the // ) "https: (...)
• 11:46
  Synchronize RTP audio and video stream - Pittie Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to synchronize audio and video streams but the output audio stream seems to be 1 second ahead from the video stream. sender: ffmpeg -re -fflags +igndts -fflags +genpts -i input.mp4 -b:v 1200k -r 30 -c:v libx264 -an -sdp_file test.sdp -f rtp rtp://localhost:8036 -fflags +igndts -fflags +genpts -c:a copy -vn -f rtp rtp://localhost:8038 receiver: ffmpeg -c:v h264 -i test.sdp -filter_complex "[0:v] setpts='(RTCTIME - RTCSTART) / (TB * 1000000)' [v1]; [0:a] asetpts='(RTCTIME - RTCSTART) / (TB * 1000000)' [a0]" -map (...)
• 10:51
  Correct usage of thread_queue_size in ffmpeg - Alf Newest 'ffmpeg' Questions - Stack Overflow
  I am doing a screencast where I am recording what is going on at my screen together with simultaneous audio comments from an external USB microphone. I am using the following command: ffmpeg -f x11grab -r 25 -s 1280x720 -i :0.0+320,236 -thread_queue_size 1024 -f alsa -thread_queue_size 1024 -i hw:1 -vcodec huffyuv screencast.mkv I thought that using such high values for thread_queue_size should put me on the safe site to avoid any buffer xrun errors which I had previously. However, this seems not to be the case. Here is the warning message which appeared (...)
• 10:12
  Do avcodec_receive_frame and avcodec_send_packet block / how to design ffmpeg decoding loop? - Paprika Newest 'ffmpeg' Questions - Stack Overflow
  I'm thinking about how to design a loop that reads frames from internet, feed to ffmpeg decoder and then receive from ffmpeg to send to a render. Take this pseudocode loop in consideration: while true auto packet = receive_packet_from_network(); avcodec_send_packet(packet); auto frame = alloc_empty_frame(); int r = avcodec_receive_frame(&frame); if (r==0) send_to_render(frame); do avcodec_send_packet or avcodec_receive_frame block or ffmpeg has an internal thread? I'm concerned about this loop because it waits for (...)
• 09:27
  FFMPEG Debug "Invalid data found when processing input" - dgcipp Newest 'ffmpeg' Questions - Stack Overflow
  How can I debug this error? I am trying to display a vp8-encoded video stream (TCP) from Android (x86) to my PC but I got this message from ffplay: "tcp://10.8.0.3:49152? listen: Invalid data found when processing input" With h264 it works and the same code in an android device works with vp8 too. Command in the server: ffplay -i tcp://10.8.0.3:49152?listen I have tried adding verbosity or log-level debug, but it shows the same. How can I get a detailed error?  (...) --
• 08:52
  How to create a video from a series of images with varying image durations? - user1354557 Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to programmatically create a video file that is composed of a series of images. However, I'd also like to be able to specify a duration for each image. I often see ffmpeg examples suggested for similar tasks, but they always assume the same duration for each image. Is there an efficient way to accomplish this? (An inefficient solution might be setting the frame rate to something high and repeatedly copying each image until it matches the intended duration) I will be dynamically generating each of the images as well, so if there is way to encode the image data (...) -- ffmpeg examples
• 08:43
  ffmpeg raw video and audio stdin - Adria Ciurana Newest 'ffmpeg' Questions - Stack Overflow
  Currently, I am using ffmpeg to start from frames in raw format to generate a video output that is broadcast in OBS. The problem is that we want to add an audio track to it, that is: each frame will now have its matrix of pixels and its audio. I don't know exactly how to make ffmpeg take this composite signal or what the best methodology is. Actually I use the stdin of the ffmpeg. I use this code to generate it: url = "udp://" + udp_address + ":" + str(udp_port) command = [ 'ffmpeg', '-loglevel',  (...)
• 07:40
  Android: Pass video path to FFmpeg - marian Newest 'ffmpeg' Questions - Stack Overflow
  I have developed an app that play video from gallery. I would like to add watermark using FFmpeg command in the video selected. But I do not know how to pass the path to the FFmpeg command. I could not find proper tutorials or reference regarding this. My coding are as follows: MainActivity.java: public class MainActivity extends Activity public ProgressDialog progressBar; String workFolder = null; String demoVideoFolder = null; String demoVideoPath = null; String vkLogPath = null; LoadJNI vk; private final int STOP_TRANSCODING_MSG = (...)
• 04:32
  How do you merge an audio mp4 and video mp4 with ffmpeg in python 3? - myth0s Newest 'ffmpeg' Questions - Stack Overflow
  I'm creating a script in python, that at one point needs to take two files, an audio mp4 file and video mp4 file, and merge them together. They are both of the same length, and the video file matches with the audio file. However, I can't seem to get them to merge. I first tried: input_video = ffmpeg.input(onlyVidPath + "/" + inputVidTitle + ".mp4") input_audio = ffmpeg.input(audioPath + "/" + inputAudTitle + ".mp4") fullOut = ffmpeg.output(input_video, input_audio, vidPath, f='mp4', vcodec='copy', (...)
• 03:42
  How can I use a FFmpeg filter with discord-music-system? [closed] - Michał Letkiewicz Newest 'ffmpeg' Questions - Stack Overflow
  I created and modified discord-music-system on NPM a bit, and I wanted to use the apulsator FFmpeg filter on the output. Is this possible? -- discord-music-system, apulsator FFmpeg filter
• 03:44
  using for loop in powershell with ffmpeg to create thumbnails - blue Newest 'ffmpeg' Questions - Stack Overflow
  I have this basic for loop combined with ffmpeg that creates thumbnails for each video. Could anyone help me figure out why it doesn't work? I don't really know much about powsershell. If i were to use a regular array it works but when i use a pre-sized array it does not. EDIT : somehow figured it out, i should have included the extention'.png' in the array instead of adding at the end of the for loop.i also didn't define a size for the array. $files = ⓐ(Get-ChildItem -Path 'D:\\other stuff\\ffmpeg test\\*.mp4') $filetext = (...)
• 00:40
  ffmpeg - avformat_alloc_context error in linker - ld: symbol(s) not found for architecture x86_64 - building on Mac [duplicate] - QRrabbit Newest 'ffmpeg' Questions - Stack Overflow
  I'm writing my first program - attempt at avformat libraries inside my C++ code. Linker errors on this line: AVFormatContext* av_format_ctx = avformat_alloc_context(); The error appears as such: Undefined symbols for architecture x86_64: "_avformat_alloc_context", referenced from: load_frame(char const*, int*, int*, unsigned char**) in load_frame.cpp.o "_avformat_open_input", referenced from: load_frame(char const*, int*, int*, unsigned char**) in load_frame.cpp.o ld: symbol(s) not found for architecture x86_64 Almost (...)
• 00:09
  FFmpeg: building example C codes - J. S. Newest 'ffmpeg' Questions - Stack Overflow
  I have configured and compiled the FFmpeg library using this link: https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu Now, I am trying to build example C codes provided by FFmpeg from here: https://github.com/FFmpeg/FFmpeg/tree/master/doc/examples However, when I run make install-examples or make install (suggested by /example/README), I receive this kind of message: make: *** No rule to make target '/doc/examples/README', needed by 'install-examples'. Stop. I thought this may be due to the rules not (...) -- https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu, https://github.com/FFmpeg/FFmpeg/tree/master/doc/examples