26 September

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

• 08:57
  FFMPEG Multiple task for converting video to image sequence for MacOS - Gabriel Moraes Aquino Newest 'ffmpeg' Questions - Stack Overflow
  I need help to make multiple task of that on MacOS: ffmpeg -i file.mp4 -r 0.1 output_%04d.jpg I have basically 200 video files to do that action and I want to create a single code that I can send to ffmpeg at once. I have tried with & in the end but it didn't work. please help! Gabriel
• 06:44
  Using FFMPEG, how do we add subtitles in the black bar area or under the video? - DunceDancer Newest 'ffmpeg' Questions - Stack Overflow
  I followed these steps: Added the black bars vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setsar=1" Source:How to add black borders to video Added the subtitles ("burned" it into the video) ffmpeg -i "imput.mp4" -lavfi "subtitles=subtitles.srt:force_style='Alignment=0,OutlineColour=&H100000000,BorderStyle=3,Outline=1,Shadow=0,Fontsize=18,MarginL=5,MarginV=25'" -crf 1 -c:a copy "output.mp4" Source: ffmpeg subtitles alignment and position Now I am stuck as to how to place the subtitles (...) -- Screenshot of the Problem
• 05:43
  Cut a video in between key frames without re-encoding the full video using ffpmeg? - bguiz Newest 'ffmpeg' Questions - Stack Overflow
  I would like to cut a video at the beginning at any particular timestamp, and it need to be precise, so the nearest key frame is not good enough. Also, these videos are rather long - an hour or longer - so I would like to avoid re-encoding this altogether if possible, or otherwise only re-encode a minimal fraction of the total duration. Thus, would like to maximise the use of -vcodec copy. How can I accomplish this using ffmpeg? NOTE: See scenario, and my own rough idea for a possible solution below. Scenario: Original video Length of (...)
• 03:54
  Use ffmpeg on windows to convert a set of png images to a set of webp images - januw a Newest 'ffmpeg' Questions - Stack Overflow
  I tried to use this command to convert all .png in the images directory to .webp, but it did not achieve the expected result. Is there any other way to achieve this function? images> (for %i in (*.png) do ffmpeg -i %i %2d.webp)
• 03:14
  FFMPEG Multiple task for converting video to image sequence - Gabriel Moraes Aquino Newest 'ffmpeg' Questions - Stack Overflow
  I need help to make multiple task of that: ffmpeg -i file.mp4 -r 0.1 output_%04d.jpg I have basically 200 video files to do that action and I want to create a single code that I can send to ffmpeg at once. I have tried with & in the end but it didn't work. please help! Gabriel
• 01:12
  I am using ffmpeg java library to convert captured screenshots to video. Video output is blurry - dark prince Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg java library to convert captured screenshots to video. Video which is generated as output is blurry. I am using bit rate as 9000, frames per sec as 25 and video size as that of desktop screen size. Any suggestions on how to solve this issue. P.S. I cannot use ffmpeg.exe and command line due to certain restrictions and hence I am opting for ffmpeg java library. Any suggestions on the issue or suggestions on any better approach will be helpful. Thanks in advance. ScreenRecorder.java import static (...) -- https://github.com/csanuragjain/recorder/tree/master/ScreenRecorder
• 00:48
  Colors messed up when converting an image sequence to video using ffmpeg - Form Newest 'ffmpeg' Questions - Stack Overflow
  I'm generating a video from a PNG sequence using ffmpeg but the resulting video has wrong colors compared to the source files. Getting the correct colors is important because we're using our video assets side-by-side with image assets and the colors must match perfectly (or at least, be as visually similar as possible so as not to be jarring). Our PNG input files are in the sRGB color profile. Here's the command we're running: ffmpeg -r 30 -f image2 -s 1920x1080 -i bg_analyse_%05d.png -vcodec libx264 -crf 25 -pix_fmt yuv420p output5.mp4 And (...) --
• 00:36
  End FFMPEG execution when RTMP input is closed - tidpe Newest 'ffmpeg' Questions - Stack Overflow
  I have an RTMP arut server inside which I call a python script to run an FFMPEG command and create HLS packaging. Problem is that when I stop the RTMP stream, FFMPEG still run processes in background. FFMPEG string is like this: ffmpeg -re -v verbose -i rtmp://localhost:1935/live/testlive -rw_timeout 500 -http_persistent 1 -method PUT -http_user_agent test -f hls -hls_list_size 5 -hls_flags discont_start+delete_segments -vf "scale=426:trunc(ow/a/2)*2" -c:a libfdk_aac -ar 48000 -c:v h264 -profile:v main -crf 24 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 (...)

25 September

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

• 23:39
  Is encoding and streaming images into a video in under 30 ms realistic at all? - Hamza Ghizaoui Newest 'ffmpeg' Questions - Stack Overflow
  So, a client camera would be sending 20 FPS 4000 x 3000 pixel images per second. The client want it to be streamed in under 30 ms upon receiving via a web-browser with a 1920 x 1080 resolution . Here is how we approached the problem : Image received => openCV resizes it to 1920 x 1080 => image piped to FFMPEG => ffmpeg encode it to H.264 using Nvec hardware acceleration => FFMPEG sends it via UDP-packets to a Node.js server => the Node.js server serves it to client (using React as a front-end there) The encoding time requires circa 12 ms using my best options while (...)
• 23:34
  I received connection refused error while trying to stream live video through RTMP with FFMPEG - Femzy Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a nodeJs app that can send camera stream to third party plartform i.e Facebook and Youtube using the RTMP protoco;.. It works well on my localhost but once i deploy to the server, it only give me errors. The error I get is below on this content.. Here is my codes server.js const child_process = require('child_process'); // To be used later for running FFmpeg const express = require('express'); const http = require('http'); const WebSocketServer = require('ws').Server; const app = (...)
• 21:25
  Creating text overlay like tiktok on a video in flutter [closed] - Sarthak Singhal Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create an app in which user can add text on a video like the given image. The user should be able to move the text container anywhere on the screen, resize it, and rotate it also. When this is done, the text widget should be merged on the video. For now I have used Stack to add elements and let user play with them. I want to know how to merge this text along with the background color with the video and that too for a specific time (...) --

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 23:32
  avcodec/mpeg12dec: remove inter block calls in IPU decoder - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avcodec/mpeg12dec: remove inter block calls in IPU decoder This is intra only codec. [DH] libavcodec/mpeg12dec.c

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

• 22:35
  How to extract motion vectors from h264 without a full decode on the CPU - Adrian May Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use my nose as a pointing device. The plan is to encode the video stream from a webcam pointed at my face as h264 or the like, get the motion vectors, cook the numbers a bit and chuck them into /dev/uinput to make the mouse pointer move about. The uinput bit was easy. This has to work with zero discernable latency. This, for instance: #!/bin/bash [ -p pipe.mkv ] || mkfifo pipe.mkv ffmpeg -y -rtbufsize 1M -s 640x360 -vcodec mjpeg -i /dev/video0 -c h264_nvenc pipe.mkv & ffplay -flags2 +export_mvs -vf codecview=mv=pf+bf+bb (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 22:05
  avcodec/mpeg12dec: add support for MPEG1 blocks in IPU codec - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avcodec/mpeg12dec: add support for MPEG1 blocks in IPU codec [DH] libavcodec/mpeg12dec.c

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

• 20:11
  Merge two audio tracks in a video file into one track using FFmpeg [duplicate] - Alsors Newest 'ffmpeg' Questions - Stack Overflow
  Okay so I have a video file with a video track and two audio tracks. What FFmpeg command would I use to copy the video track over and merge the two audio tracks into one? I would like the audio tracks to remain at the same quality just merged.
• 20:00
  Continuously rotate image centered on background - Tudor-Radu Barbu Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to continuously rotate an image or series of images and output as a video with ffmpeg? Rotating image should be centered over a background. See example video. -- example video
• 19:43
  Problems with ffmpeg input filenames when using bash script - Nick Styles Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use ffmpeg to convert some .m4a audio files to .mp3, and have come across something that has me stumped. I'd like to create the .mp3 in the same location and with the same filename as the .m4a, and so I'm using a combination of find/exec and a bash script to do this, as follows: find /Volumes/Untitled/ -name '[!.]*' -name '*.m4a' -exec ./m4atomp3.sh \\; where m4atomp3.sh looks like: #!/usr/bin/env bash || echo "$1 not found" ; exit 1 ; P="$1" echo "$P is the full filename" filename=$P%.* echo (...)

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 18:23
  FFmpeg : Segment muxer does not work for AVC-MXF - Mitra M Newest 'libx264' Questions - Stack Overflow
  I'm trying to save input stream to separate files every 60 seconds with the following command: ffmpeg -i Input -vcodec libx264 -s 1920x1080 -pix_fmt yuv422p10le -aspect 16:9 -acodec pcm_s24le -ac 2 -ar 48000 -f segment -strftime 1 -segment_time 60 -y "e://o1/%H-%M-%S.mxf" but getting this errors: [mxf ⓐ 000002111453c640] h264 profile not supported0:00.62 bitrate=N/A speed=1.23x [mxf ⓐ 000002111453c640] could not get h264 profile av_interleaved_write_frame(): Operation not permitted Note: The following 3 commands work without any (...)

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

• 17:51
  OpenCV FFMPEG RTSP Camera Feed Errors - trn2020 Newest 'ffmpeg' Questions - Stack Overflow
  I'm getting these errors at random times when saving frames from an rtsp camera feed. The errors happen at different times, usually after 100-200 images have been saved, and the errors themselves are not always exactly the same. They cause the images that are saved at the time of the error to be distorted either to the point of being completely grey or contain distorted pixels. #Frame_142 - [hevc ⓐ 0c3bf800] The cu_qp_delta 29 is outside the valid range [-26, 25]. #Frame_406 - [hevc ⓐ 0b6bdb80] Could not find ref with POC 41 I've tried implementing the code in (...)
• 17:38
  unable to download a file using youtube_dl - perkymaster Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to play music from a bot using ffmpeg and youtube_dl by making using of discord.py but it seems that I am unable to download the file Here is my code, voice = get(client.voice_clients, guild=ctx.guild) ydl_opts= 'format': 'bestaudio/best', 'noplaylist': 'True', 'postprocessors': [ 'key': 'FFmpegExtractAudio', 'preferredcodec':'mp3', 'prefferedquality':'192', ], with youtube_dl.YoutubeDL(ydl_opts) as (...)
• 11:08
  Show error when build win32 version Ffmpeg in windows10,How solve it? [duplicate] - lslboy Newest 'ffmpeg' Questions - Stack Overflow
  I build a win32 version FFmpeg for get the .dll and .lib file in windows10 follow the https://trac.ffmpeg.org/wiki/CompilationGuide/WinRT document, I executed the command ../../../configure \\ --toolchain=msvc \\ --disable-programs \\ --disable-d3d11va \\ --disable-dxva2 \\ --arch=x86 \\ --enable-shared \\ --enable-cross-compile \\ --target-os=win32 \\ --extra-cflags="-MD -DWINAPI_FAMILY=WINAPI_FAMILY_APP -D_WIN32_WINNT=0x0A00" \\ --extra-ldflags="-APPCONTAINER WindowsApp.lib" \\ --prefix=../../../Build/Windows10/x86 everything works well, (...) -- https://trac.ffmpeg.org/wiki/CompilationGuide/WinRT
• 16:28
  Extract image of every frame of a video using react-native-ffmpeg - EdG Newest 'ffmpeg' Questions - Stack Overflow
  I have looked all over the internet to get a way to extract image of everyframe of a video using react-native-ffmpeg. I am making a mobile app and I want to show all per frame images on the video timeline. I want to do this natively on mobile so that I can utilise hardware power of mobile. That is the reason I am looking for react-native-ffmpeg kind of library. Am I in the right direction? This npmjs.com/package/react-native-ffmpeg is what I am trying to use. I need to know the command to do the job. (...) -- npmjs.com/package/react-native-ffmpeg
• 15:46
  Problem with Getting Output with Accents When Using PHP exec Command with ffprobe - user5919866 Newest 'ffmpeg' Questions - Stack Overflow
  I am retrieving the output of ffprobe with PHP exec command to get information from mp3 files. The problem is that if there is any text in the output containing accents or apostrophes, then I don't get those displayed. I am running PHP 7.3.19 on Debian 10. The output locale -a from the commandline is: C C.UTF-8 en_US.utf8 POSIX I have tried several things in my PHP script such as: $cmd = 'LANG=\\"en_US.UTF8\\" ffprobe -loglevel error -show_entries format=duration:format_tags -of json "' . $FinalFilenamePath . '"'; exec($cmd, (...)

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 14:39
  Anomalie #4556 (Nouveau): Description du repo - jluc - Revisions : SPIP
  Sur https://git.spip.net/spip/spip , le descriptif du projet SPIP est obsolète : `Dépôt officiel du core SPIP * Copie possible par svn sur svn://trac.rezo.net/spip * Les svn:externals sont présent dans https://git.spip.net/SPIP/[nom du plugin dist]`.

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

• 13:21
  Discord.js Music Bot ffmpeg not found? - cccmdm Newest 'ffmpeg' Questions - Stack Overflow
  I just started learning javascript with node.js and I am attempting to create a music bot, I've set up the command handler and everything, however, I keep getting this error when I try to run the play command Error: FFmpeg/avconv not found! at Function.getInfo (C:\\Users\\johnd\\OneDrive\\Desktop\\discordBot\\node_modules\\prism-media\\src\\core\\FFmpeg.js:130:11) at Function.create (C:\\Users\\johnd\\OneDrive\\Desktop\\discordBot\\node_modules\\prism-media\\src\\core\\FFmpeg.js:143:38) at new FFmpeg (...) -- https://imgur.com/a/EFM1G6s
• 15:02
  Laravel FFMpeg - FFMpeg cannot edit existing files in-place - wlaskovic Newest 'ffmpeg' Questions - Stack Overflow
  After I wanted to upload a video in the queue was returned a failed job. [2020-09-25 13:24:25][125] Processing: App\\Jobs\\ConvertVideoForStreaming [2020-09-25 13:24:26][125] Failed: App\\Jobs\\ConvertVideoForStreaming So I've took from the DB failed_jobs table the response and run the following: C:\\ffmpeg\\bin\\ffmpeg.exe -y -i "C:\\wamp64\\www\\laravel-stream\\storage\\app/public\\WF3UL8fJTSE7BMxa.mp4" -threads 12 -vcodec libx264 -acodec libmp3lame -b:v 500k -refs 6 -coder 1 -sc_threshold 40 -flags +loop -me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 -qdiff (...)
• 13:42
  How to extract jpeg/png images from RTSP stream without encoding the whole stream? - Rune Aspvik Newest 'ffmpeg' Questions - Stack Overflow
  I am building a video system in Node.js based on IP cameras. They all output RTSP streams and MJPEG streams. However the Mjpeg is unreliable for web browser display snapshots and so I want to create my own snapshots. I'm using FFMPEG to record the RTSP stream so that's been my tool. So far I've tried two options: FFMPEG with two outputs: ffmpeg -i rtsp://.... -c copy output.ts -r 1/5 -s 640x360 -f image2 -update 1 -y snap.jpg This works really well, but it's using a lot of resources since even though I only need a low res image every 5 sec, it (...)
• 12:14
  FFMPEG - local video to UDP streaming to OpenCV - video quality degraded - user3925023 Newest 'ffmpeg' Questions - Stack Overflow
  my goal is to re-stream local video content / desktop screencasting, to an UDP flow that I need to process on a Python script. Here is the FFMPEG script that I'm using: ffmpeg -re -i C:\\Users\\test\\Downloads\\out.ts -strict -2 -c:v copy -an -preset slower -tune stillimage -b 11200k -f rawvideo udp://127.0.0.1:5000 And here is the simple Python script supposed to read the stream flow: import cv2 cap = cv2.VideoCapture('udp://127.0.0.1:5000',cv2.CAP_FFMPEG) if not cap.isOpened(): print('VideoCapture not (...) --
• 11:54
  I am merging two videos using ffmpeg concat filter. First video has no audio and 2nd video has audio. How do I do it? [closed] - Akashnil Roy Newest 'ffmpeg' Questions - Stack Overflow
  When I merge it I have an output video file which has the audio of the 2nd video file missing. I am using : ffmpeg -f concat -safe 0 -i -c copy The txt file contains the name of the 2 files. I have looked through the ffmpeg documentation. I am new to this and can't understand where lies the problem.

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 10:58
  Evolution #4468: Unification des CSS pour les boutons et les icônes Revisions : SPIP
  Et j'ai réessayé avec un spip nu, sans aucun plugin supplémentaire : pareil

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

• 11:05
  ffmpeg throwing System.AccessViolationException - shmit Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to extract frames and iterate over them. The codes iterates correctly over few frames and then then randomly throws error "System.AccessViolationException: 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.' Any suggestions on how to resolve it? System details and screenshot below: System Details: OS: Windows TargetFramework: .netCore3.1 Nugets: FFMediaToolkit v3.0.0 and SixLabors.ImageSharp v1.0.0 Shared dlls copied from: https://ffmpeg.zeranoe.com/builds/ for version (...) -- https://ffmpeg.zeranoe.com/builds/,
• 10:53
  C# WinForms, play video using the FFmpeg library - Damn Vegetables Newest 'ffmpeg' Questions - Stack Overflow
  According to web search results, FFmpeg.AutoGen provides video/audio frames with timing data, and I could use them to render the way I want. But I cannot find a simple example for playing a video file on a WinForms window, using FFmpeg. In the example file, I can see code for initialisation and decoding video frames. How to play those frames smoothly on WinForms? Should I use some sort of DirectX library? -- In the example file
• 10:33
  Using FFmpeg AutoGen save to bitmap works on Windows but not on Linux - Chris Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg.AutoGen to decrypt video and save the frames as bitmaps. Code is using dotnet core and I'd like to get it working for both Windows and Linux. The code is similar to the example provided: https://github.com/Ruslan-B/FFmpeg.AutoGen/blob/db9bcd4b9dfad5d117ffd71fe1a2d073e96a3520/FFmpeg.AutoGen.Example/Program.cs AVFrame convertedFrame = this.converter.Convert(frame); Bitmap image = new Bitmap(convertedFrame.width, convertedFrame.height, convertedFrame.linesize[0], PixelFormat.Format24bppRgb, (IntPtr)convertedFrame.data[0]); When saving the (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen/blob/db9bcd4b9dfad5d117ffd71fe1a2d073e96a3520/FFmpeg.AutoGen.Example/Program.cs
• 10:07
  Extract video or audio from frame index ffmpeg [duplicate] - DustinPham Newest 'ffmpeg' Questions - Stack Overflow
  I have a list of frames index, for example: [1,5,6,7,100,106,1100]. How I extract a video / audio from source video that only includes the above frames using ffmpeg?
• 10:07
  (FFmpeg) How to extract vocal from a song? - tasy5kg Newest 'ffmpeg' Questions - Stack Overflow
  As we all know, we can use FFmpeg to remove vocal from a song: $ ffmpeg -i song.mp3 -af pan="stereo|c0=c0|c1=-1*c1" -ac 1 karaoke.mp3 Then, how to use FFmpeg to do the opposite thing: extract vocal from a song?
• 09:40
  ffmpeg - audio is 500ms behind video in screen recording - Riz Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to record my screen along with the audio using ffmpeg 4.3. But in the final output, my audio is around 500ms to 1sec behind the video. How this can be fixed? Here is the command I am using on Windows 10 machine: ffmpeg.exe -threads 4 -rtbufsize 1024m -f dshow -i audio="Microphone (Realtek Audio)" -f gdigrab -offset_x 0 -offset_y 0 -video_size 1920x1080 -framerate 30 -probesize 32 -i desktop -pix_fmt yuv420p -c:v libx264 -crf 28 -preset ultrafast -tune zerolatency -movflags +faststart (...)
• 06:53
  FFMPEG - how to transcode input stream while cutting off first few seconds of video and audio - purplepear24 Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to transcode a screen-record (x11) input stream to MP4. I would like to cut off the first ~10 seconds of the stream, which is just a blank screen (this is intentional). I understand how to trim video with ffmpeg when converting from mp4 to another mp4, but i can't find any working solution for processing an input stream while accounting for delay and audio/video syncing. Here is my current code: const spawn = require('child_process'); const S3Uploader = require('./utils/upload'); const MEETING_URL = (...)
• 06:40
  ffmpeg - how to pass all streams audio/tmcd, etc from input->output unchanged - Selene Newest 'ffmpeg' Questions - Stack Overflow
  Please help me, with hopefully specific ffmpeg arguments to include in my video encoding. My work is only related to video stream, so this is the only one I'm changing. I receive a .mov file(s) that have already been pre-compiled for a specific broadcaster, some of those selfcontained videos have 4 streams (1 video, 2 audio, and some other timecode stream). Others have up to 17 streams: 1-video, 15-audio streams and the final one is unsupported tmcd. My process pipeline includes only re-encoding/re-processing video stream, and everything else I need to pass along to the (...)
• 06:06
  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 (...)
• 06:03
  FFMPEG - Encode a .wav file to G711 - aebner Newest 'ffmpeg' Questions - Stack Overflow
  My question is the following: how to encode a .wav file to G.711/PCM A-law? I tried to edit this example file, but I got an EINVAL error when tried to call av_frame_get_buffer(frame, 0) with frame->nb_samples = c->frame_size which is 0 (I think this is the problem) because of pcm.c:37 (at least I think because of it). So with which parameters allocate an audio data buffer by myself if av_frame_get_buffer() doesn't do this for me and how to use it? Thanks for reply! EDIT: My code: #include #include #include #include #include (...) -- this example file, pcm.c:37
• 05:17
  AWS lambda layer call says opt/ffmpeg is not a directory - Mayowa Daniel Newest 'ffmpeg' Questions - Stack Overflow
  I followed this tutorial for making ffmpeg a lambda layer https://www.serverless.com/blog/publish-aws-lambda-layers-serverless-framework I ran ls in my directory with spawnsync and the opt directory was empty and so ffmpeg didn't fire. Any pointers on what I might be doing wrong? I'm using node.js12.x as my runtime with the serverless framework. -- https://www.serverless.com/blog/publish-aws-lambda-layers-serverless-framework
• 04:56
  ffmpeg compile fail with unknown problem (for android) - Rocky Newest 'ffmpeg' Questions - Stack Overflow
  FFmpeg version : latest version download from ffmpeg.org Compile environment : window 10 with mingw msys NDK : r21b I want to compile FFmpeg .a file to one 'libffmpeg.so'. I get an error message but I don’t know the reason. Error message is clear but I can't find where is -lgcc_real or how to get it. following message is my error message. d:\\android-ndk-r21b\\toolchains\\llvm\\prebuilt\\windows-x86_64\\bin\\aarch64-linux-android-ld.exe: cannot find -lgcc_real following code is my build (...)
• 04:26
  How to install libavcodec and libavutil from its source in linux - Necktwi Newest 'ffmpeg' Questions - Stack Overflow
  FFMPEG is providing libavutil and libavcodec libraries. While compiling and installing ffmpeg as described at https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu I can find libavcodec and libavutil folders in the ffmpeg source folder. I want to install these libraries to use them in my c++ programs. But there are no Makefiles in these folders. How can I install them? -- https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
• 00:23
  How can I extract a good quality JPEG image from a video file with ffmpeg? - Daniel Gartmann Newest 'ffmpeg' Questions - Stack Overflow
  Currently I am using this command to extract the images: ffmpeg -i input.mp4 output_%03d.jpeg But how can I improve the JPEG image quality?
• 00:05
  ffmpeg quality conversion options (video compression) - Jason Hunter Newest 'ffmpeg' Questions - Stack Overflow
  Can you provide a link, or an explanation, to the -q:v 1 argument that deals with video/image quality, and compression, in ffmpeg. Let me explain... for f in * do extension="$f##*." filename="$f%.*" ffmpeg -i "$f" -q:v 1 "$filename"_lq."$extension" rm -f "$f" done The ffmpeg for loop above compresses all images and videos in your working directory, it basically lowers the quality which results in smaller file sizes (the desired outcome). I'm most interested in the -q:v 1 argument of this for loop. The 1 in the -q:v 1 argument is (...) -- the official documentation