20 September

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

• 17:03
  Mac terminal command to list files and sort by date to use in ffmpeg - Jeff Newest 'ffmpeg' Questions - Stack Overflow
  I am using a gopro to film a bunch of videos. I want to then take those videos directly from the SD card folder and concatenate them into a single video (bypass an editor) by using FFMPEG. I'm currently able to stitch together "chaptered" videos with the following example command on my Mac (10.13): ffmpeg -f concat -safe 0 -i The reason for this is that the ffmpeg command requires a text file that looks like this: file '/folder/GH016992.MP4' file '/folder/GH036990.MP4' ... The real command is this, which (...) -- https://opensource.com/article/19/6/how-write-loop-bash
• 16:59
  How to use GPU to accelerate the processing speed of ffmpeg filter? - Zedd W Newest 'ffmpeg' Questions - Stack Overflow
  According to NVIDIA's developer website, you can use GPU to speed up the rendering of the ffmpeg filter. Create high-performance end-to-end hardware-accelerated video processing, 1:N encoding and 1:N transcoding pipeline using built-in > filters in FFmpeg Ability to add your own custom high-performance CUDA filters using the shared CUDA context implementation in FFmpeg The problem I am having now is how to use the GPU to speed up multiple ffmpeg filter processing? For example: ffmpeg -loop 1 -i dog.jpg -filter_complex (...)
• 16:59
  ffmpeg subtitles alignment and position - friendlygiraffe Newest 'ffmpeg' Questions - Stack Overflow
  I am adding subtitles to a video using: ffmpeg -i "imput.mp4" -lavfi "subtitles=subtitles.srt:force_style='OutlineColour=&H100000000,BorderStyle=3,Outline=1,Shadow=0,Fontsize=18'" -crf 1 -c:a copy "output.mp4" Which results in: I am repositioning this using Alignment : ffmpeg -i "imput.mp4" -lavfi "subtitles=subtitles.srt:force_style='Alignment=9,OutlineColour=&H100000000,BorderStyle=3,Outline=1,Shadow=0,Fontsize=18'" -crf 1 -c:a copy "output.mp4" But according to the Line-Alignment (...) -- Line-Alignment ASS Tags
• 16:45
  ffmpeg cut video and put audio in the middle of it - deathangel908 Newest 'ffmpeg' Questions - Stack Overflow
  I have a video file of 60s duration. an audio file of 35s duration I want to cut a video from 5th second to 50th and put an audio file in the middle that starts playing at 5th second of the output. So first 5 and last 5 seconds output video is silent. I also don't want to reencode the video so compilation would be fast and quality would stay exactly the same. I'm trying the following command ffmpeg -y -i DJI_0325.mp4 -ss 00:00:40.5 -i song.mp3 -c:v copy -c:a copy out.mp4 but the audio starts playing in the middle. I also tried (...) --
• 15:25
  How can i generate rtp pcap file with silk codec? - mohammad noroz Newest 'ffmpeg' Questions - Stack Overflow
  for a university project my teacher said me generate rtp pcap file with silk codec. I explorer ffmpeg and i dont see any thing useful for me for generate rtp pcap file with encode silk codec.
• 14:59
  I got that error when i try to play music with my bot on discord - TheKillerBoss 27 Newest 'ffmpeg' Questions - Stack Overflow
  (node:10076) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'id' of undefined at play (C:\\Users\\USER\\Desktop\\Giochi e Programmi\\Foto video ecc\\Proggetti\\Discord-bot\\Akagi-chan\\Akagi_chan.js:49:51) at C:\\Users\\USER\\Desktop\\Giochi e Programmi\\Foto video ecc\\Proggetti\\Discord-bot\\Akagi-chan\\Akagi_chan.js:89:17 at processTicksAndRejections (internal/process/task_queues.js:97:5) (node:10076) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or (...) -- https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode
• 04:34
  FFMPEG Combine a list of jpg with mo3 audios to sepatated videos on batch [closed] - Francisco Barrod Newest 'ffmpeg' Questions - Stack Overflow
  i have a big list of jpg and mp3 files. each of them have identical names but they not enumerated. example cat.jpg and cat.mp3 pig.jpg and pig.jpg i want to make videos cat.mp4 pig.mp4 i have a code to do this manually but i want to make it on batch. heres my code ffmpeg -loop 1 -i cat.jpg -i cat.mp3 -threads 8 -shortest -c:v libx264 -c:a copy cat.mp4 its simple but works for my need. need help to make it on batch- thanks in (...)
• 14:16
  Ffmpeg seeking with m3u8 ineffective - Lemon Sky Newest 'ffmpeg' Questions - Stack Overflow
  Following the answer at Ffmpeg inaccurate cutting with ts and m3u8 files despite resamping audio filter, I am cutting some portion out of an m3u8 file. My m3u8 has a segment every 4 seconds, so I seek to a location around 10 seconds before the cutting point with -ss before -i. Then adjust position with -ss after -i. Here are two examples where the starting cut points are off by 1s: ffmpeg -y -ss 0:03:22 -start_at_zero -i http://tyberis.com/CFTE-AM_2020-08-28_23-00-00.m3u8 -ss 1 -t 0:00:10 322.wav ffmpeg -y -ss 0:03:23 -start_at_zero -i (...)
• 11:47
  How to use FFMPEG on Python/Windows10 with Pipe for Screen recording? - Trmotta Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to record the screen with ffmpeg as it seems to be the only player out there who can record a region of the screen along with the mouse cursor. The following code was adapted from i want to display mouse pointer in my recording but it doesn't work on a Windows 10 (x64) setup (using Python 3.6). #!/usr/bin/env python3 # ffmpeg -y -pix_fmt bgr0 -f avfoundation -r 20 -t 10 -i 1 -vf scale=w=3840:h=2160 -f rawvideo /dev/null import sys import cv2 import time import subprocess import numpy as np w,h = 100, 100 def (...) -- https://github.com/abhiTronix/vidgear, https://github.com/kkroening/ffmpeg-python
• 10:36
  ffmpeg: error while loading shared libraries: libopenh264.so.5 - ESZ Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg and getting this error ffmpeg: error while loading shared libraries: libopenh264.so.5: cannot open shared object file: No such file or directory I have already checked if the library exists and it does. I added it to /etc/ld.so.conf as mentioned in this previous question but it doesn't work.
• 10:23
  Remuxing MKV to MP4 fails when using -map 0 but works fine when Remuxing MP4 to MKV - AppetiteForDestruction Newest 'ffmpeg' Questions - Stack Overflow
  I have an MKV file that contains 5 streams... 0: video 1: audio 2: audio 3: text 4: menu I was able to remux the MKV into an MP4 using this command... > ffmpeg.exe -i input.mp4 -map 0 -c copy -c:s mov_text output.mkv The resulting output MP4 contains all the streams from the original MKV. But if I try to remux the output MP4 into an MKV using the same command, but with a different codec for the subtitles (srt) and different file extension (mkv), I get an error. However, if I omit "-map 0" from the command, it works but only ONE of the audio (...)
• 05:56
  How can I segment a ts file on scene change detection using FFmpeg? - Mike Davis Newest 'ffmpeg' Questions - Stack Overflow
  I am either not asking the question in a way Google can understand, or no one has asked this, as every issue I can find is in regards to outputting images of each scene. I want to output video segments… I have an input video that is basically a slide show, except the slides coincide with songs, so they are not at regular intervals. I would like to segment and create a sequence of ts files that are split based on a scene change threshold, and have a separate ts file for each (...)
• 03:58
  ffmpeg - top coded first (swapped) vs progressive -top 1 does not stick - Selene Newest 'ffmpeg' Questions - Stack Overflow
  please help: I'm encoding a video, and because of my specific use-case, I have to encode it twice, in sequence, so that the output from the first run of ffmpeg goes into second encoding of ffmpeg as an input. I use "-top 1" option to force "top coded first (swapped)". When encoding the first iteration of encoding, everything works great (output from ffprobe below): Duration: 00:00:22.16, start: 0.000000, bitrate: 61390 kb/s Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p(tv, bt709, top coded first (swapped)), 1920x1080 ... etc-etc.  (...)
• 03:22
  ffmpeg options for encoding a video mpeg2video but with .mov extension - Selene Newest 'ffmpeg' Questions - Stack Overflow
  I just finished a project, and need to produce an output in the specific format, should be exactly the same as the format of the video I received. The best way for me to identify the source format was to use ffprobe. Here was the output of that: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mov': Metadata: creation_time : 2020-02-27T04:15:23.000000Z Duration: 00:00:22.13, start: 0.000000, bitrate: 111320 kb/s Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p(tv, bt709, top coded first (swapped)), 1920x1080 [SAR 1:1 DAR 16:9], (...)
• 00:29
  Make Discord bot play sound from a direct url - merctraider Newest 'ffmpeg' Questions - Stack Overflow
  I want to make a discordpy bot that plays audio files from a specific link on the internet, rather than from a local directory. It seems that all the other examples use ytdl, but those are for video streaming sites. How should I go about doing this? if(voice_channel != None): vc = await voice_channel.connect() vc.play(discord.FFmpegPCMAudio('http://website/001.mp3'), after=lambda e: print('done', e)) else: await ctx.send("Join a voice channel (...)

19 September

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

• 23:59
  Wrap audio data of the pcm_alaw type into an MKA audio file using the ffmpeg API - bbdd Newest 'ffmpeg' Questions - Stack Overflow
  Imagine that in my project, I receive RTP packets with the payload type-8, for later saving this load as the Nth part of the audio track. I extract this load from the RTP packet and save it to a temporary buffer: ... while ((rtp = receiveRtpPackets()).withoutErrors()) payloadData.push(rtp.getPayloadData()); audioGenerator.setPayloadData(payloadData); audioGenerator.recordToFile(); ... After filling a temporary buffer of a certain size with this payload, I process this buffer, namely, extract the entire payload and encode it using (...) -- type-8, ffmpeg, Matroska, pcm_alaw, vlc, av_guess_codec(), All, this
• 23:13
  Using ffmpeg to get video info - why do I need to specify an output file? - Redtopia Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to get info about a video file and I don't want to save the info into a file. ffmpeg is returning all the video info, but it's returning as an error because I'm not specifying an output file. The command I'm using is: ffmpeg -i C:\\Test\\3FA8D0E6-BD61-D160-98BB41304D63FAE3.mp4 The error I get is "At least one output file must be specified" I'm calling this in ColdFusion using , and the output is being stored in a local variable, which is why I don't want to specify a file... I just don't need to (...)
• 21:13
  can we apply fecolor matrix in FFmpeg? - Dubey sai vithal teja Newest 'ffmpeg' Questions - Stack Overflow
  Im using FFmpeg from 2 days. I learned how to add watermarks and mix audio and video . Is there a way to use recolor matrix to make video filters. Thanks
• 20:43
  How to compress video size without changing much quality and without changing framerate (Ffmpeg)? - WebDiva Newest 'ffmpeg' Questions - Stack Overflow
  I am using this command to compress my videos: ffmpeg -y -i video.mp4 -vcodec libx264 -crf 24 -preset ultrafast compressed.mp4 Although it works okay, there is a slight increase in duration because I am changing the framerate of videos, and we need the video to be the exact duration. Is there a way to compress videos without changing the framerate? any help would be appreciated. Thank you. Log: ffmpeg version git-2020-08-31-4a11a6f Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.1 (GCC) 20200805 configuration: --enable-gpl (...)
• 20:36
  Speed up reading video frames from camera with Opencv - Tuyen Vo Quang Newest 'ffmpeg' Questions - Stack Overflow
  Currently, i have my application implemented in Python to read camera frames via USB. I use Opencv, but for camera with 60fps and 1920x1080 resolution, i could not capture the this speed. I try something: cv2.VideoCapture(0, cv2.CAP_FFMPEG), but i could not the frames (capture read returns False). Could you please suggest any solutions or ways to improve the overall speed or even processing them in GPU. # Opencv 3.4.9 & Python 3.6.9 import cv2 capture = cv2.VideoCapture(0, cv2.CAP_FFMPEG) while True: ret, frame = capture.read() if ret:  (...)
• 19:40
  how to cut 2 seconds of video after each 10 seconds with ffmpeg? - ben_copper Newest 'ffmpeg' Questions - Stack Overflow
  i have a long video which require to cut 2 seconds of video after each 10 seconds , how can i do that with FFMPEG ? I have tried video filter trim but it didn't cut video automatically after 10 seconds. Using -ss and -to option will require to create video parts and then concat them and it will take lot of time. Is there any Method in FFMPEG to do that. Thanks
• 04:50
  How to concat 2 FLAC files using ffmpeg version 3.4.8 [duplicate] - Armstrong Soo Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to concatenate 2 flac files in Ubuntu via CLI. The first flac file is "mynameis.flac", which contains the audio of "My name is" and lasts 2.66 sec. The second flac file is "stt_VNFKEY.fac" that contains audio of a name that last 1.9 sec. After a successful concatenation, I expect the output "test.flac" should contain an audio of about 3.56 sec (2.66+1.9). However, the following command only yield the "mynameis" in the output. What do I need to do to concat both flacs? ffmpeg -i mynameis.flac -i stt_VNFKEY.flac test.flac ffmpeg version 3.4.8-0ubuntu0.2 (...)
• 18:07
  Xcode 12: how to link against object files built for free standing - Jean-Michaël Celerier Newest 'ffmpeg' Questions - Stack Overflow
  The issue is about linking x86_64 macOS executables statically against libavcodec, libavdevice, etc, which have some object files built against freestanding as they use YASM which isn't able to embed the macOS "tag" in the binary (see Building for macOS, but linking in object file built for free standing for detailed information on that issue). Everything works fine under Xcode 11.6 - the following messages are here, but they are warnings. With the Xcode 12 update they become an error. How to make them warnings again ? I could not find anything relevant in the ld man (...)
• 17:55
  How is audio data stored in raw pcm format？ - Tian Ye Newest 'ffmpeg' Questions - Stack Overflow
  I am writing an app to manipulate audio where i need to convert a file (wav, MP3, etc) to raw data (samples are presented as float) at the first place. I use ffmpeg in cmd: ffmpeg -i test.wav -f s16le -acodec pcm_s16le output.dat How are samples represented in the output.dat file? I know one sample needs two bytes under S16, and dual channel means it is stored as L1 R1 L2 R2 ... But does this file come with a frame presentation or all the byte in the dat file are sample values? The converted files' size of test.wav via two methods is not identical. (...)
• 17:46
  How to merge subtitle files in one sami file - rush Newest 'ffmpeg' Questions - Stack Overflow
  I want to make a multilanguage subtitle file from multi srt file what I mean is if I have en.srt ar.srt fr.srt I want to make subtitle.smi sami files can contain more than on subtitle and can choose any of them from video player I search for tool in command line or python script/library to do that
• 17:12
  FFMPEG with moviepy - Shenhav Mor Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on something that concatenate videos and adds some titles on through moviepy. As I saw on the web and on my on pc moviepy works on the CPU and takes a lot of time to save(render) a movie. Is there a way to improve the speed by running the writing of moviepy on GPU? Like using FFmpeg or something like this? I didn't find an answer to that on the web, so I hope that some of you can help me. I tried using thread=4 and thread=16 but they are still very very slow and didn't change much. My CPU is very strong (i7 10700k), but still, rendering on (...)
• 15:15
  ffmpeg: transcode over socket - user14258924 Newest 'ffmpeg' Questions - Stack Overflow
  I am consuming multiple streams of h264 video and aac audio data in my own RTMP server and I want to transcode these streams into different codecs so I want to send these tracks, in chunks, into ffmpeg and get the transcoded result back. But due to performance requirements I want to use some kind of streaming where I can just open up a socket to get files in/out instead of dumping the data into individual files and then reading transcoded files back. Is it possible with (...)
• 13:54
  Convert ogg audio to wav in python without ffmpeg - Talha Anwar Newest 'ffmpeg' Questions - Stack Overflow
  I am getting oga file from javascript blob and I want to convert it to PCM compatible wav file in python. The approach I am using is as follow AudioSegment.converter = r"C:/ffmpeg/bin/ffmpeg.exe" AudioSegment.ffprobe = r"C:/ffmpeg/bin/ffprobe.exe" sound = AudioSegment.from_file("file.oga") sound.export("file.wav", format="wav") For this I have to download ffmpeg locally. Is there any way to convert oga file to wave directly. This is how i am saving file f = open('./file.oga', (...)
• 13:07
  stream FFMPEG clients on webserver [closed] - Pierre Newest 'ffmpeg' Questions - Stack Overflow
  i tried to make a picture that sums up what i want to do. I hope you understand :) protocol operation please guide me the best of the best would be not to open ports ! clients sending their FFMPEG stream (h264) --> server who interprets them --> front-end which displays all the video streams (php nodejs..) Thanks x) -- protocol operation
• 11:44
  Using Timeline Support with "reverse" in ffmpeg - Ffmpeg Newest 'ffmpeg' Questions - Stack Overflow
  I want to reverse a small space in my video that doesn't seem like Timeline editing doesn't support that I tried to use the following command ffmpeg -y -i "input. *" -filter_complex "reverse = enable = 'gte (t, 3)': preset = cross_process" -vcodec libx264 -pix_fmt yuv420p -r 30 -g 60 -b: v 1200k -acodec libmp3lame -b: a 128k -ar 44100 -preset superfast "output .mp4" Look forward to the help . thank you
• 11:36
  How to batch process a directory of mp4 files to remove their metadata? - sd100 Newest 'ffmpeg' Questions - Stack Overflow
  I convert one mp4 file using ffmpeg to remove all metadata from the mp4 file with the following command: ffmpeg -i test.mp4 -map_metadata -1 -c:v copy -c:a copy out.mp4 This works fine but I want a bash script that will automatically remove all metadata of a directory containing mp4 files, with minimum interaction. How can I do that?
• 11:12
  Getting Error with node-media-serve and ffmpeg in heroku - Anurag Gautam Newest 'ffmpeg' Questions - Stack Overflow
  I have created a MERN app with video streaming by using node-media-serve module, with following configuration trans: ffmpeg: '/vendor/ffmpeg', tasks: [] , ..... In local I have installed ffmpeg in trans.ffmpeg. and its working fine, But how we need to install ffmpeg in heroku . I have tried by adding heroku buildpacks heroku buildpacks:add https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest.git but its showing me error. May be some issue with config only. Heroku error : 2020-09-16T11:23:54.292896+00:00 (...)
• 10:13
  Increase volume on multiple files - Reckless Velociraptor Newest 'ffmpeg' Questions - Stack Overflow
  Let say I have a couple of hundreds mp3 files. How do I increase volume in all of them with ffmpeg? This is for single file: ffmpeg -i input.mp3 -filter:a "volume=1.5" output.mp3 And what about multiple files with one command?
• 04:12
  How can i stream through ffmpeg a canvas generated in Node.js to youtube/any other rtmp server? - DDC Newest 'ffmpeg' Questions - Stack Overflow
  i wanted to generate some images in Node.JS, compile them to a video and stream them to youtube. To generate the images i'm using the node-canvas module. This sounds simple enough, but i wanted to generate the images continuously, and stream the result in realtime. I'm very new to this whole thing, and what i was thinking about doing, after reading a bunch of resources on the internet was: Open ffmpeg with spawn('ffmpeg', ...args), setting the output to the destination rtmp server Generate the image in the canvas Convert the content of the canvas to a (...)
• 03:50
  Process video frame by frame with NodeJS - Michael Studebaker Newest 'ffmpeg' Questions - Stack Overflow
  I want to be able to process a video frame by frame with NodeJS. I've looked at fluent-ffmpeg, but I don't think it supports processing the video frame by frame.