15 November

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

• 10:24
  Best multiplatform C++ Library for screen, audio and microphonecapture [on hold] - Baschdel Newest 'ffmpeg' Questions - Stack Overflow
  Im searching for some librarys C++. I'm trying to record an microphone and capture the computerscreen. At the moment I am recording audio with portaudioand use the screencapture part of ffmpeg. Muxing the streams together should be accomplished by ffmpeg. The whole project should run on macOS, Windows and Linux. I'm relativly new to this subject so I really don't know if this are the right tools to use, or if there are much easyer and better tools. For my understanding ffmpeg is the biggest and best library for sclaing muxing, etc. But ffmpeg is not great in recordig screen or audio. (...)
• 15:33
  Convert file with any extension to MP4 with ffmpeg - not legit Newest 'ffmpeg' Questions - Stack Overflow
  I am using youtube-dl and ffmpeg to create a youtube downloader and converter (for personal use). I am trying to download a video and convert it to MP4. The problem I have, is that youtube-dl downloads the video in a variety of formats. Is there a way that I can download the video and then tell FFMPEG to convert it, not knowing the current file type? I tried using a * wild card but that results in an error. ⓐecho off title youtube downloader set /p name= URL: echo Select a type. (vid/mp3/mp4) set /p type= IF /i "%type%"=="vid" goto vid IF /i "%type%"=="mp3" goto mp3 IF /i (...)
• 14:52
  How To Call JAVA Methods from inside of a Thread in JNI - Falcuun Newest 'ffmpeg' Questions - Stack Overflow
  TL;DR; I'm having a problem with passing my FFMPEG raw data from C++ code to JAVA code, for displaying, through a thread. There is a server set up that sends out encoded frames to its clients. Those encoded frames are encoded with some FFMPEG magic. When received on client side, the fore-mentioned frames are getting decoded into raw RGB data (as a unsigned char *). The problem now is that frames are being received in a "listener" of sorts. Just a thread running in the background polling the server and running specific onFrame function once a new frame is available. The current solution (...)
• 13:16
  add localtime to each frame as metadata or subtitle while streaming use ffmpeg - Mohammad M Newest 'ffmpeg' Questions - Stack Overflow
  I want to encode some raw frames as nvenc_h264 and then stream it over UDP. What I need, now, is to add some data like capturing time to each frame as its metadata or subtitle(just for that frame or specifying in the metadata that it is just related to which frame.). now I use this command in C# to start FFmpeg for receiving raw frame using pipe and stream it over UDP. "-f rawvideo -vcodec rawvideo -pixel_format rgba" + " -colorspace bt709" + " -s " + width + "x" + height + " -framerate " + frameRate + " -vsync 0 " + " -loglevel warning -i - "// +// preset.GetOptions() + " -c:v (...) -- https://github.com/keijiro/FFmpegOut
• 13:34
  Youtube-dl cannot read various set on batch script - Al UrbaseR Blongtous Newest 'ffmpeg' Questions - Stack Overflow
  I created an batch-script that positioned with youtube-dl and ffmpeg. I set several set to put URL and Video/Audio ID. Here my script that I simplified ⓐecho off cd /d %root%\\YT color 0a title Youtube Downloader setlocal enableDelayedExpansion set q=^" color 0a :submenu echo Please enter URL. set /p f1="URL: " echo Checking ID... youtube-dl -F %f1% ping localhost -n 2 >nul goto menu :menu echo. echo Script created by UrbaseR echo ___________________________________________________________ echo. echo MENU echo ___________________________________________________________ echo OS Windows - (...)
• 11:55
  ffmpeg: Text rendered in a box with alignment - Hemanth Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to render text onto a video, using the drawtext option. I would like it to appear in a box of a certain dimension (smaller than the video dimensions). For example, if the video is of size 480x360, I would like to render text in a box of 100x100. I need this text to be justify aligned (both the left and right margins should be aligned). Is there some option in ffmpeg to do this? If not, is there some open source library that can achieve the (...)
• 11:09
  How do you convert an entire directory with ffmpeg? - Eugene Newest 'ffmpeg' Questions - Stack Overflow
  How do you convert an entire directory/folder with ffmpeg via command line or with a batch script?
• 10:36
  FFmpeg/DASH: duration or timestamp out of range for mov/mp4 format - mike Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert a aac stream to dash. The issue is that I get a lot of errors as below(though it seems to segment it into multiple files but I get errors on the player too). The question is why do I get these errors and how can I fix it? If I simply convert "copy" it into to a single mp4 file it works without error. ffmpeg -i "a.mkv" -y -map 0:1 -c:0 copy -min_seg_duration 1000000 -use_timeline 1 -use_template 1 -init_seg_name init.mp4s -media_seg_name "\\$Number\\$.mp4s" -adaptation_sets "id=1,streams=0" -remove_at_exit 0 -f dash -dash 1 "out/stream.mpd" -loglevel error Output [mp4 (...)
• 10:20
  Is there a way to convert a .PAR file extension to a .AVI or .MP4 using FFMPEG? - PuppyD13 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert .PAR files to .AVI or .MP4 using FFMPEG. However, when I try to convert to .AVI it's giving me the following error: [mpeg4 ⓐ 0000000000702200] header damaged. Error while decoding stream #0:0: Invalid data found when processing input. When I try to convert the .PAR to .MP4, it completes the conversion but the outputted footage will be all scrambled and oddly enough it will include frames from other channels(cameras). Is there a way how I can successfully convert .PAR file to .AVI or .MP4, (...)
• 10:04
  Can't use libopenh264-2.0.0-android.so for my android app because of 32-bit support - Kiem Duong Newest 'ffmpeg' Questions - Stack Overflow
  In my video editing android app, because of licensing reason, I had to download libopenh264-2.0.0-android.so.bz2 dynamically from this site https://github.com/cisco/openh264/releases to use with ffmpeg. However, if I disable 64-bit for the app, I can't publish the app on Google Play. The store requires 64-bit support. If I enable 64-bit, I can't use the openh264-android.so library, the ffmpeg commands don't work Here is the way I disabled 64-bit in build.gradle ndk abiFilters "armeabi","armeabi-v7a","x86" Anyone can help on this issue please? (...) -- https://github.com/cisco/openh264/releases
• 09:31
  'undefined symbol: __stack_chk_guard' in libopenh264.so when building FFmpeg with emcc - Christophe Fuzier Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to build codecbox.js on Ubuntu 18.04, which involves building FFmpeg with emcc. At some stage of the build process, FFmpeg's configure script tries to process the following code: #include #include long check_WelsGetCodecVersion(void) return (long) WelsGetCodecVersion; int main(void) int ret = 0; ret |= ((intptr_t)check_WelsGetCodecVersion) & 0xFFFF; return ret; and I get a linker error: wasm-ld: error: /.../codecbox.js/build/dist/lib/libopenh264.so: undefined symbol: __stack_chk_guard It seems to be related to Stack Smashing Protector compiler feature. I tried to (...) -- codecbox.js, Stack Smashing Protector
• 09:31
  How to add custom external video filter to ffmpeg at runtime? - alex Newest 'ffmpeg' Questions - Stack Overflow
  Trying to build ffplay app that uses ffmpeg LGPL build with custom filter that I want to plug in during runtime. Differently from adding custom filter during compilation described scenario is not documented, thus tried to experiment. Tried executing avfilter_register and avfilter_graph_alloc_filter functions before avfilter_graph_parse_ptr with avfilter_graph_parse_ptr resulting in -22 return value (Invalid argument). Filter graph string: [in] split [T1], fifo, [T2] overlay=0:H/2 [out]; [T1] fifo, crop=iw:ih/2:0:ih/2, my_edgedetect=low=0.1:high=0.4 [T2] Lines added to (...) -- ffplay, LGPL build, adding custom filter during compilation, avfilter_register, avfilter_graph_alloc_filter, avfilter_graph_parse_ptr, configure_filtergraph, Custom edge detect filter
• 09:07
  ffmpeg - Convert mkv to mp4 on ubuntu 18.10 error? - ScipioAfricanus Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert some mkvs to mp4s on Ubuntu 18.10 with ffmpeg, and I keep getting the error below. Aby thoughts? I am following https://linuxconfig.org/install-ffmpeg-on-ubuntu-18-04-bionic-beaver-linux#h2-operating-system-and-software-versions I have installed ffmpeg and installed: sudo apt install -y libopus-dev libmp3lame-dev libfdk-aac-dev libvpx-dev libx264-dev yasm libass-dev libtheora-dev libvorbis-dev mercurial cmake Command I ran with output: ffmpeg -i 'video.mkv' -codec copy 'video.mp4' -strict -2 -y ffmpeg version 4.0.2-2 Copyright (c) 2000-2018 the FFmpeg developers (...) -- https://linuxconfig.org/install-ffmpeg-on-ubuntu-18-04-bionic-beaver-linux#h2-operating-system-and-software-versions
• 08:13
  video concat in flutter with ffmpeg plugin, unable to get correct output - Deepak Gehlot Newest 'ffmpeg' Questions - Stack Overflow
  i have an issue with video concat in flutter with ffmpeg plugin, I am getting return code 0 which means success, but when I checked output video its not merge two video its only first video My video format is MP4. here is my command _flutterFFmpeg.execute('-i "concat:$v2.path|$v1.path|$v2.path" -c copy -y $fileJoin.path')
• 07:19
  Ffmpeg rtmp to hls conversion but how to solve network issue? - Baka-Maru Lama Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert hls stream from rtmp source and its' working fine but the problem is when rtmp server is down or network issue the ffmpeg hls conversion process gets stuck and never comes to work again even if rtmp server is back online. I've tried -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 5 command - it says option is not recognized options by the way I'm using ffmpeg [v4.2.1]. I'm using following ffmpeg commands ffmpeg -i rtmp://localhost/living/test ^ -max_muxing_queue_size 9999 ^ -async 1 -vf yadif -g 29.97 -r 23 ^ -b:v:0 3150k -c:v libx264 -filter:v:0 (...)
• 08:23
  ffmpeg convert from H.264 (High 4:4:4 Profile) to H.264 (Main Profile) - Milad Newest 'ffmpeg' Questions - Stack Overflow
  How can I convert a video from H.264 (High 4:4:4 Profile) to H.264 (Main Profile) using ffmpeg? I can't do that with this command: ffmpeg -i 1/25359.mp4 -profile:v main out.mp4. That'd return an error: ... That'd return an error: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1/25359.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf56.40.101 Duration: 00:00:06.08, start: 0.000000, bitrate: 1059 kb/s Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 351x297, 1057 kb/s, 12.50 fps, 12.50 tbr, 12800 tbn, 25 (...)
• 05:48
  Mix 2 audio files with android ffmpeg android - user3673182 Newest 'ffmpeg' Questions - Stack Overflow
  I am developing an android application for mixing 2 audio files.And i use android ffmpeg for that.I use following lib. from GitHub https://github.com/guardianproject/android-ffmpeg-java I use following code to mix 2 audio files from activity . try File fileAppRoot = new File(getApplicationInfo().dataDir); SoxController sxCon = new SoxController(fileAppRoot, new ShellUtils.ShellCallback() ⓐOverride public void shellOut(String shellLine) System.out.println(shellLine); ⓐOverride public void processComplete(int exitValue) System.out.println("hello"); ); List files=new ArrayList(); (...) -- https://github.com/guardianproject/android-ffmpeg-java
• 02:49
  Open raw audio with avformat_open_input - IMelker Newest 'ffmpeg' Questions - Stack Overflow
  I want to fill ffmpeg.formatCtx for raw(LINEAR16,48000khz) audio file using avformat_open_input(). I've tried to pass own AVInputFormat, but not suceeded in it. This is how i used to open file. std::string fn = "file:" + this->file.path; int r = avformat_open_input(&ffmpeg.formatCtx, fn.c_str(), nullptr, nullptr); Tried to find needed format with av_find_input_format(), but not succeeded to0. Without input format ffmpeg determines file as mp3. Is there convenient way to do such (...)
• 02:28
  On ffmpeg, how to bypass low-pass filter for LFE channel when encoding .wav to .ac3? - CC2023 Newest 'ffmpeg' Questions - Stack Overflow
  Looks like ffmpeg encoding added a low-pass filter for the LFE channel by default. Crossover is around 150Hz~ish. Does anyone know how to bypass (disable) the low-pass filter? This is command I used: ffmpeg -i 6_channels.wav -c:a ac3 5_1.ac3 Thanks.

14 November

Revisions : multilang http://zone.spip.org/trac/spip-zone/log/_plugins_/multilang

• 15:41
  Revision 118634: Icône renommée, suite - Charles Razack Revisions : multilang
  Icône renommée, suite -- Log
• 15:37
  Revision 118632: Gros oups : l'identifiant de la langue était extrait directement du ... - Charles Razack Revisions : multilang
  Gros oups : l'identifiant de la langue était extrait directement du texte même des boutons, en supprimant les crochets :/ Mais du coup maintenant on met le nom complet de la langue, patatra... Il faut utiliser un attribut pour ce genre de choses, « lang » est tout indiqué. -- Log
• 15:37
  Revision 118631: icone renommée - Charles Razack Revisions : multilang
  icone renommée -- Log
• 15:37
  Revision 118630: Pas de majuscule forcée pour le nom des langues - Charles Razack Revisions : multilang
  Pas de majuscule forcée pour le nom des langues -- Log
• 05:41
  Revision 118618: [Salvatore] [source:_plugins_/multilang/trunk/lang/ multilang] Export ... - salvatoreⓐ… Revisions : multilang
  [Salvatore] multilang Export depuis ​http://trad.spip.net -- Log

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

• 21:01
  FFMPEG HLS stream for Android and IOS - Poda Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream to mobile devices with ffmpeg and apache2.2 but I haven't been successful. I used this command to create the segments and the playlist: ffmpeg -i http://x.x.x.x:8080 -codec:v libx264 -r 25 -pix_fmt yuv420p -profile:v baseline -level 3 -b:v 500k -s 640x480 -codec:a aac -strict experimental -ac 2 -b:a 128k -movflags faststart -flags -global_header -map 0 -f hls -hls_time 10 -hls_list_size 5 -hls_allow_cache 0 -sc_threshold 0 -hls_flags delete_segments -hls_segment_filename out%05d.ts list.m3u8 The source is a http stream which is streamed by VLC media player. Example (...)
• 20:46
  Generating a waveform of raw audio using ffmpeg not working right (not showing clippings) - Sergey Romanyuk Newest 'ffmpeg' Questions - Stack Overflow
  I generated a waveform of the raw audio with ffmpeg and it looks as perfectly normal audio on the picture. But when I imported it in Audacity, I can see and hear that the audio is clipping. I tried simple command: ffmpeg -f s16le -ar 16000 -ac 1 -i audio.raw -lavfi showwavespic audio.png With this result: waveform image 1 And also tried this solution https://stackoverflow.com/a/32276471/12253501 Looks much prettier, but still can't see that audio actually clipped: waveform image 2. For the second one I made sure to delete "compand=gain=-6" to get the actual audio level. And here's (...) -- waveform image 1, waveform image 2, screenshot from Audacity, raw and wav
• 22:13
  Rails 6 ActiveStorage re-encode videos - gorgon Newest 'ffmpeg' Questions - Stack Overflow
  Tried to use ActiveStorage::Previewer:VideoPreviewer to reencode original videos into smaller resolution and length, but it seems that it can only produce/extract image from video. Also tried to create a custom VideoPreviewer by using ffmpeg command to reencode videos, and rails seems to always favor the default ActiveStorage::Previewer::VideoPreviewer. Even if i kick out default video preview from rails previewer and put the custom one, rails still tried to use imagemagick and generates images class VideoPreviewer Is there a way to achieve this with ActiveStorage or i need to go back (...)
• 17:24
  How to map frame extracted with ffmpeg and subtitle of a video? (frame accuracy problem) - Abitbol Newest 'ffmpeg' Questions - Stack Overflow
  would like to generate text files for frames extracted with ffmpeg, containing subtitle of the frame if any, on a video for which I have burn the subtitles using ffmpeg also. I use a python script with pysrt to open the subrip file and generate the text files. What I am doing is that each frames is named with the frame number by ffmpeg, then and since they are extracted at a constant rate, I can easily retrieve the time position of the frame using the formula t1 = fnum/fps, where fnum is the number of the frame retrieved with the filename, and fps is the frequency passed to ffmpeg for (...)
• 16:50
  Using FFmpeg or Similar to Normalize audio in a video to EBU R128 standard - MrNeedHelpPlease Newest 'ffmpeg' Questions - Stack Overflow
  This is my first time here on stack overflow asking question. I am stuck and really struggling with this. I am trying to make some of my MXF video files to be EBU r128 standard for its audio. This means that it has to be -23 and not higher than 0.5. My current process Watch_folder > Encoding to MXF > Output_folder I need to makesure when its comes to output folder, those MXF files are EBU R128 Loudness compliant. What I have done so Far: FFMPEG: ffmpeg -i input.mxf -af loudnorm=I=-23:LRA=7:tp=-2:print_format=json -f null - got the result: Input Integrated: -15.1 LUFS Input True (...)

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

• 15:44
  avcodec/avcodec: Adapt the doc of av_bsf_send_packet to match its actual implementation. - Andreas Rheinhardt git.videolan.org Git - ffmpeg.git/rss log
  avcodec/avcodec: Adapt the doc of av_bsf_send_packet to match its actual implementation. Explicitly allowing empty packets to signal flushing helps getting rid of special cases. It does not hinder the ability to send i.e. timing-only packets, because one can send packets with zero size and pkt->data set. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardtⓐgmail.com> Signed-off-by: James Almer <jamrialⓐgmail.com> [DH] libavcodec/avcodec.h
• 15:06
  avformat/av1dec: Redo flushing of bsf - Andreas Rheinhardt git.videolan.org Git - ffmpeg.git/rss log
  avformat/av1dec: Redo flushing of bsf The current approach has two different calls to av_bsf_send_packet(): A normal one, sending a packet; and an extraordinary one just for flushing. These can be unified into one by making use of the newly documented fact that av_bsf_send_packet() allows to signal flushing via empty packets (i.e. packets without data and side-data). This also fixes CID 1455685 which resulted from the fact that the call for flushing was not checked given that it couldn't fail. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardtⓐgmail.com> Signed-off-by: James (...)

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

• 16:02
  Create movie programatically - Martin Delille Newest 'ffmpeg' Questions - Stack Overflow
  I would like to create a movie programatically. My first iteration is to create a picture sequence with QPainter rendering (see https://github.com/MartinDelille/videogenerator) and then assemble them with ffmpeg but I would be more happy to generate the video file directly. I choose QPainter, but I'm open to QML rendering mechanism which is more modern in my opinion. What would be the best approach for this? -- https://github.com/MartinDelille/videogenerator
• 15:59
  How to add subtitles to the encoded video using ffmpeg? - geo-freak Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add my srt file to the video using the options which were answered here before. My input file has captions in it by default. I tried in different ways to get the captions enabled in my encoded video. Below are the commands I used. ffmpeg -i input.ts -i captions.srt -b:a 32000 -ar 48000 -force_key_frames 'expr:gte(t,n_forced*3)' -acodec libfaac -hls_flags single_file -hls_list_size 0 -hls_time 3 -vcodec libx264 -s 320x240 -b:v 512000 -maxrate 512000 -c:s mov_text outfile.ts But I couldn't see the captions after I see the mediainfo of the encoded file. You can see the log (...)
• 13:59
  I have installed FFMPEG and can't find it inside a PHP script - Antop Newest 'ffmpeg' Questions - Stack Overflow
  I have installed FFMPeg in CentOS. It works perfectly. It's inside /usr/bin directory. Also, I have PHP 7.2.24 that comes with Plesk 18.0.20. I want to use FFMPeg inside a PHP script, but that script can't find the executable of FFMpeg. I have tried giving the exact route (/usr/bin/ffmpeg) but doesn't work. It's a production server. The same script, in my development server (macOS) works perfectly. I tried using: var_dump(getenv('PATH')); var_dump(exec('which ffmpeg')); var_dump(ini_get('open_basedir')); var_dump(is_file(exec('which ffmpeg'))); var_dump(is_executable(exec('which (...)
• 13:52
  How to convert image to video using fluent-ffmpeg in NodeJS - MjM Newest 'ffmpeg' Questions - Stack Overflow
  I would like to create a video using fluent-ffmpeg in NodeJS. My objective is to create a video using one image. And what I have done so far is the following: var express = require('express') var router = express.Router() const ffmpeg = require('fluent-ffmpeg'); router.get('/test', function (req, res) // make sure you set the correct path to your video file var proc = ffmpeg('http://localhost:3000/images/image.jpg') // loop for 5 seconds .loop(5) // using 25 fps .fps(25) // setup event handlers .on('end', function () console.log('file has been converted succesfully'); ) .on('error', (...)
• 13:37
  FFMPG Concat two video quality issue - Salah Hammouda Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to concat two mp4 video files using ffmpg (with the below command), a main video and a secondary one, the main video always have 1080x1920 resolution and the resulting video should have the some resolution. val concat = "-i $mainVideoPath -i $secondVideoPath -filter_complex [0:v]scale=1080:1920:force_original_aspect_ratio=decrease,setsar=1:1,pad=1080:1920:(ow-iw)/2:(oh-ih)/2[s0];[1:v]scale=1080:1920:force_original_aspect_ratio=decrease,setsar=1:1,pad=1080:1920:(ow-iw)/2:(oh-ih)/2[s1];[s0][s1]concat=n=2:v=1[v] -map [v] $resultVideoPath" The concat work fine but the main part (...)
• 13:15
  Technology Make Video [closed] - Soul Newest 'ffmpeg' Questions - Stack Overflow
  I want to make a video maker like promo.com (Merge multiple video forms, insert text and effects into the video). But don't know which technology or language supports this. I am currently learning ffmpeg, but I find it quite complicated and difficult to use. May people have experience sharing the appropriate technology or language. Thanks.
• 13:14
  Is there a way if a video file has pixelation in FFmpeg? - A Person Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to identify if a video file has pixelation or not, Currently, I have a watch folder where videos are dropped, I have a trigger every 120 seconds that check the folder to see if there are any video files. If there is a file, it uses MediaInfo command-line to extract the encoding of the video and audio. I also use ffprobe on a video to see if it throws out an error like moov atom not found to know if the video is corrupted. However, I want to be able to tell if a video file has a pixelation. I know that I can use str, std, to print out the debug logs. However, I am finding it (...)
• 12:53
  Is there a way to analyse a video to find out its loudness and then correct it to ebu r128 - A Person Newest 'ffmpeg' Questions - Stack Overflow
  I wanted to see if anyone know the best way I can analyse a audio of a video and find out it's loudness. I want to use this information to then correct the audio either through FFmpeg or other means. The audio has to met https://tech.ebu.ch/docs/r/r128.pdf the ebu standard of loudness -23 and not higher than 0.5. is there a way to do this? I am having difficulties finding a solution. -- https://tech.ebu.ch/docs/r/r128.pdf
• 11:44
  how to catch process’s output? [closed] - WQF Newest 'ffmpeg' Questions - Stack Overflow
  I want run this command in Java with ProcessBuilder. ffmpeg -y -i pipe:0 -ac 1 -ar 16k -f s16le -acodec pcm_s16le pipe:1 how should I do? One thread input bytes, and another thread catch output?
• 06:14
  (C++) I need a program source to parse almost all parameters it receives into a new process call [closed] - fss1704 Newest 'ffmpeg' Questions - Stack Overflow
  I have a program that receive some arguments from another program i can't modify, i need to intercept the arguments and remove one argument (-i randomfilename.gif) from the arguments and then call the original renamed executable with the filtered argument, the original argument looks like this "ffmpeg.exe -y -i file1.tmp -i file2.tmp -i randomfilename.gif -c:v copy -g 9999 -c:a copy -threads 4 outputfile.mp4" The gif is a w4t3rmark, that's why i want it gone, a simple argument change can remove this stuff and make the conversion proccess much quicker if it doesn't have to reprocess the (...)
• 14:21
  Error while opening encoder for output stream #1:2 - maybe incorrect parameters such as bit_rate, rate, width or height - geo-freak Newest 'ffmpeg' Questions - Stack Overflow
  I am encoding a video which has dvb_teletext inside. I got an error saying Error while opening encoder for output stream #1:2. I used the following command to encode my video. ffmpeg -threads 8 -i input.ts -s 400x222 -qscale:v 4 -vcodec libx264 -s 320x240 -b:v 512000 -maxrate 512000 -acodec libfaac -b:a 32000 -ar 48000 -force_key_frames expr:gte(t,n_forced*3) -hls_flags single_file -hls_list_size 0 -hls_time 3 -y output.m3u8 You can see the log output of my command. Input #0, mpegts, from 'pipe:': Duration: N/A, start: 91105.257722, bitrate: N/A Program 1 Stream #0:0[0x4b1]: Video: h264 (...)
• 14:17
  How to speed up ffmpeg streaming on android using libvlc? - ALirezaSO Newest 'ffmpeg' Questions - Stack Overflow
  I'm streaming live from my GoPro inside my android app. I use ffmpeg to receive the streaming data from the GoPro and vlc to play it in a surfaceview. I used the code which is provided by KonradIT here. The main command used for the ffmpeg is: -fflags nobuffer -f mpegts -i udp://:8554 -f mpegts udp://127.0.0.1:8555/gopro?pkt_size=64 and the options for vlclib are: options.add("--aout=opensles"); options.add("--audio-time-stretch"); options.add("-vvv"); The output is something worse. It's laggy and its speed is about 17 FPS. And one annoying thing is the streamed picture is very small (...) -- here
• 14:14
  Why my nodejs giving this problem while starting to run rtsp? - Rajaram Newest 'ffmpeg' Questions - Stack Overflow
  While starting the server for the first time just after the code checkout , my react js project is throwing error "events.js:187 throw er; // Unhandled 'error' event" . I have node 13.1.0 and npm 6.12.1. [ '-rtsp_transport', 'tcp', '-i', 'rtsp://user:user123ⓐ192.168.1.100:88/videoSub', '-f', 'mpeg1video', '-b:v', '1000k', '-an', '-r', '24', '-' ] events.js:187 throw er; // Unhandled 'error' event ^ Error: spawn ffmpeg ENOENT at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19) at onErrorNT (internal/child_process.js:456:16) at processTicksAndRejections (...)
• 14:06
  Video play in slow motion while converting webm file to mp4 using ffmpeg - Hardik Kothari Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg-static-electron in electron app for converting webm file to mp4 and that file will be play in mobile app as android and ios. Here I am using ffmpeg command for converting webm file to mp4. await execa(ffmpegPath, [ '-i', inputPath, '-f', 'mp4', '-vcodec','libx264', // video codec '-acodec','aac', // audio codec '-b:v', '6400k', // video bitrate '-b:a', '4800k', // audio bitrate '-strict', 'experimental', // standard '-r', '30000/1001', '-crf', '26', '-g', '16', '-movflags', 'faststart', '-preset', 'veryfast', outputPath, ]) I used '-g' to 16 for solving a dragging (...) -- ffmpeg-static-electron, https://textuploader.com/1o1ml

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

• 12:37
  Evolution #3821: [sécurité - cookie] possibilité de gérer l'attribut "secure" du cookie spip sess... - Pierre KUHN Revisions : SPIP
  Bonjour, Est ce que c'est prévu de l'intégré dans les prochaines version de SPIP ou pas encore ? Cordialement.

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

• 09:26
  ffmpeg showing null when i am trying using php file - Vishal Mehra Newest 'ffmpeg' Questions - Stack Overflow
  Here is the output ffmpeg path in server rootⓐserver.rkv.igq.mybluehost.me [~]# whereis ffmpeg ffmpeg: /usr/bin/ffmpeg /usr/local/bin/ffmpeg /usr/include/ffmpeg /usr/share/ffm peg /usr/share/man/man1/ffmpeg.1.gz /usr/src/ffmpegscript/ffmpeg When I am trying to run command (ffmpeg -i sample.mp4 sample.avi) using SSH it is working fine but when I am trying using PHP it is not working. Here is my PHP code: include 'usr/local/bin/ffmpeg/'; var_dump(shell_exec('ffmpeg -i sample.mp4 (...)
• 09:10
  How to concat multiple MP4 files using fluent-ffmpeg? - LYMSTAR Newest 'ffmpeg' Questions - Stack Overflow
  I want to build a function to concat mp4 files using Firebase and fluent-ffmpeg. version ・fluent-ffmpeg 2.1.2 ・Firebase 7.6.0 However, an error will occur after startup. The following is the error content. Error: ffmpeg exited with code 1: Output with label '/tmp/public/thumbnail/source0000.jpg.mp4' does not exist in any defined filter graph, or was already used elsewhere. Below is the actual code. const from = concatFilePath.map(function(value) return path.join(os.tmpdir(), value); ); const chainedInputs = from.reduce((result, inputItem) => result.input(inputItem), ffmpeg()); (...)
• 08:58
  ffprobe or avprobe not found. Please install one - Anass El Fakir Newest 'ffmpeg' Questions - Stack Overflow
  i want to add tags to mp3 converted by youtube-dl & ffmpeg : youtube-dl -o '/Output/qpgTC9MDx1o.mp3' qpgTC9MDx1o -f bestaudio --extract-audio --metadata-from-title "%(artist)s - %(title)s" 2>&1 i have this error in output result : [youtube] qpgTC9MDx1o: Downloading webpage [youtube] qpgTC9MDx1o: Extracting video information [youtube] qpgTC9MDx1o: Downloading js player en_US-vfluGO3jj [youtube] qpgTC9MDx1o: Downloading DASH manifest [download] /var/www/vhosts/mp3-y.com/httpdocs/Mp3_Output/quick-mp3.com-JALAL-EL-HAMDAOUI-2007-ARRASSIATES-VOL2-F1P-9CDoxlQ.mp3 has already been (...)
• 08:07
  ffmpeg burn chinese subtitle(srt) with error - Zedd Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to add Chinese subtitles to the video. and the libass library has been installed. I execute the following command and error messages will appear ffmpeg -i video.mp4 -vf "ass=subtitle.srt" -y out.mp4 error message: And the Chinese subtitles of the output video are unreadable. So the question I want to ask is： What caused this? how to fix? -- ,
• 07:31
  How to check ffmpeg is working in my server on not - Vishal Mehra Newest 'ffmpeg' Questions - Stack Overflow
  I have installed ffmpeg package in my bluehost server. How to check ffmpeg is working in my server on not Here is the output ffmpeg path in server rootⓐserver.rkv.igq.mybluehost.me [~]# whereis ffmpeg ffmpeg: /usr/bin/ffmpeg /usr/local/bin/ffmpeg /usr/include/ffmpeg /usr/share/ffm peg /usr/share/man/man1/ffmpeg.1.gz /usr/src/ffmpegscript/ffmpeg when i am trying to run command (ffmpeg -i sample.mp4 sample.avi) using putty it is working fine but when i am trying using php it is not working here is my php code include 'usr/local/bin/ffmpeg/'; shell_exec('ffmpeg -i sample.mp4 (...)
• 01:52
  Video was encoded with a new width + height along with the old one. Can I re-encode with just the old dimensions using ffmpeg? - Kabir Newest 'ffmpeg' Questions - Stack Overflow
  I've got a video out of OBS that play's normally on my system if I open it with VLC for example, but when I import it into my editor (Adobe Premiere) it gets weirdly cropped down. When inspecting the data for the video it's because for some reason the video gets encoded with a new width and height over top of the old one! Is there a way using ffmpeg to re-encode/transcode the video to a new file with only the original width and height? Bonus question: would there be a way for me to extract the audio channels from my video as separate .mp3s? There are 4 audio channels on the (...) --
• 01:05
  Storing large videos on the Server - civ15 Newest 'ffmpeg' Questions - Stack Overflow
  In my application the client is uploading relatively large videos, average is 500 MB. I have to encode the video in the backend to reduce the size, and I'm trying to use ffmpeg for that. However, ffmpeg needs around 10 minutes for each video, and I should be able to serve the video to the client instantly, or, at least in a few seconds after the upload is finished. What would be the best practice in this context?