11 July

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

• 21:40
  How to add a new filter to ffmpeg library - Croolman Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add functionality to FFmpeg library. The issue is that in developer guide there are just general instruction on how to do it. I know that when I want to add something to ffmpeg I need to register the new functionality and rebuild the library so I can then call it somehow like so: ffmpeg -i input.avi -vf "myfilter" out.avi I do not want to officialy contribute. I would like to try to create the extra functionality and test it. The question is - is there any scelet file where the basic structure would be ready and you would just get a pointer to a new (...)
• 20:25
  Convert Webrtc track stream to URL (RTSP/UDP/RTP/Http) in Video tag - Zeeshan Younis Newest 'ffmpeg' Questions - Stack Overflow
  I am new in WebRTC and i have done client/server connection, from client i choose WebCam and post stream to server using Track and on Server side i am getting that track and assign track stream to video source. Everything till now fine but problem is now i include AI(Artificial Intelligence) and now i want to convert my track stream to URL maybe UDP/RTSP/RTP etc. So AI will use that URL for object detection. I don't know how we can convert track stream to URL. Although there is a couple of packages like https://ffmpeg.org/ and RTP to Webrtc etc, i am using Nodejs, Socket.io and (...) -- https://ffmpeg.org/, https://github.com/Basscord/webrtc-video-broadcast
• 19:34
  How to add 'now playing' song title info to an rtmp audio stream in ffmpeg - no_event_logged Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add 'now playing' metadata to a rtmp audio stream using ffmpeg. My current ffmpeg encoder string looks like this and is working fine, just missing the now playing info: "C:\\Program Files (x86)\\ffmpeg\\bin\\ffmpeg.exe" -re -f dshow -i audio="Line 2 (Virtual Audio Cable)" -acodec libfdk_aac -profile:a aac_he_v2 -cutoff 18000 -ab 48k -ac 2 -ar 44100 -f flv "rtmp://blah.com:1935/live/mystream The playout software (StationPlaylist) exports the current song title to C:\\NowPlaying\\nowplaying.txt but I have no idea how to get ffmpeg to inject this / keep it (...)
• 19:10
  Use fluent-ffmpeg to tell if a file is a video or audio - afterglowlee Newest 'ffmpeg' Questions - Stack Overflow
  I am using node-fluent-ffmpeg module in NodeJS. It is very good that fluent-ffmpeg provides functions to get the metadata of a video and audio file. https://github.com/schaermu/node-fluent-ffmpeg#reading-video-metadata I have tried on Mac OS to use the "resolution" attribute in the metadata to tell if a file is audio only or video, i.e. if both resolution.w and resolution.h are 0, then this file is an audio. This work fine on Mac OS. But some strange things happened that this doesn't work on Windows platform (I have tried Windows 7 64bit and Windows 2008) using (...) -- https://github.com/schaermu/node-fluent-ffmpeg#reading-video-metadata
• 18:15
  FFmpeg causing AttributeError: __enter__ on Win10 - Marci Newest 'ffmpeg' Questions - Stack Overflow
  I have a python code which runs perfectly on win7, but i struggle for hours now making it work on my win10 laptop. Before manually installing FFmpeg i receive the error "assert _HAS_FFMPEG, "Cannot find installation of real FFmpeg (which comes with ffprobe)." AssertionError: Cannot find installation of real FFmpeg (which comes with ffprobe)" so i downloaded, unzipped FFmpeg and set up the PATH. From now on i always receive the following error: with FFmpegReader(str(sourcepath)) as src: AttributeError: __enter__ I red that this error has something (...)
• 16:36
  Getting List of default argument values if not used in FFMPEG command execution - Pradeep Prabhu Newest 'ffmpeg' Questions - Stack Overflow
  When I use FFMPEG to capture a live IPTV stream on my MAC, I generally end up with an interrupted video. When I send these four arguments, the capture is successful. reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2 I don't want to specify these arguments everytime, So I decided to update the default values in the source code. Unsure if I have done it right - I updated http.c which contains these arguments. I re-compiled FFMPEG successfully. I want to know if my changes are applied. Is there a way I can list out all the default values of the (...)
• 15:30
  How to add a thumbnail to a .webm video with FFmpeg - Claudio Ciccarone Newest 'ffmpeg' Questions - Stack Overflow
  I have a .webm video and i want to add a thumbnail to this video. With mp4 it's pretty easy to do but with webm FFmpeg gives to me this error: [webm ⓐ 0000024391cf6b80] Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM. Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument This is the comand line: ffmpeg_x64 -i "../video.webm" -i ../thumb.jpg -loglevel warning -map 1 -map 0 -vcodec copy -acodec copy ../out.webm With mp4 it's alright. I know that the problem is (...)
• 14:00
  GPUMp4Composer is Muting my video, when app is running on my phnone(android 10). But it is working fine in Emulator(android 9) - Monis Khan Newest 'ffmpeg' Questions - Stack Overflow
  I am using GPUMp4Composer for adding two things: -Filter -Watermark Both the things are working correctly in the emulator (android 9). But the resulted video from GPUMp4Composer does not have any sound (muted) when I am using the app on my phone (android 10). This is my code: Bitmap watermark = BitmapFactory.decodeResource(getResources(), R.drawable.watermark); new GPUMp4Composer(srcMp4Path, destMp4Path) .size(540, 960) .videoBitrate((int) (0.25 * 16 * 540 * 960)) .filter(new (...)

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

• 14:17
  Anomalie #4442: Notice quand ajout d'un dépôt - Franck D Revisions : SPIP
  Hello :) Windows 10 (1909) Firefox 78.0.1 Laragon en php 7.4.8 spip 3.3 dev (24642] A savoir, depuis la création du ticket, il y a eu des changement dans les numéros de lignes: Notice: Undefined index: module in C:\\laragon\\www\\test15\\plugins-dist\\svp\\inc\\svp_phraser.php on line 381 Notice: Undefined index: module in C:\\laragon\\www\\test15\\plugins-dist\\svp\\inc\\svp_phraser.php on line 382 Notice: Undefined index: module in C:\\laragon\\www\\test15\\plugins-dist\\svp\\inc\\svp_phraser.php on line (...)

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

• 13:42
  Can't obtain information with ffmpeg from Smooth Streaming Manifest file - albertoiNET Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to get details for a stream of protocol Microsoft Smooth Streaming, with ffmpeg tools (ffprobe and ffplay) but when I run the next command: ffprobe -i http://b31282.cdn.telefonica.com/31282/Manifest I obtain this: http://b31282.cdn.telefonica.com/31282/Manifest: Invalid data found when processing input I assume that this Manifest file is correct and complies with standards of Smooth Streaming . This is a brief extract of Manifest file: oioAAAIAAQCUAjwAV... Is a Fedora (...)
• 12:04
  `ffmpeg record audio output device - Roy Newest 'ffmpeg' Questions - Stack Overflow
  i am trying to capture my pulse output device: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor with this command: /usr/bin/ffmpeg -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor -c:a aac -b:a 128k /roee_files/test.wav i get this output with those warnings, and there is an audio delay: ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39) configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg (...)
• 11:27
  Combining 2 FFMPEG Commands - John Doe Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to combine 2 ffmpeg commands, one which creates the video, and another which adds a simple fade to the beginning of the created video. Here's what I have: ffmpeg -y -stream_loop -1 -i "video.mp4" -stream_loop -1 -i "music.mp3" -i "audio.mp3" -filter_complex "[1:a]volume=0.1[a1];[2:a]adelay=5000|5000,apad=pad_dur=10[a2];[a1][a2]amerge=inputs=2,afade=in:st=0:d=5[audio]" -map "0:v" -map "[audio]" -c:v libx264 -c:a aac -ac 2 -ar 22050 -preset veryfast -shortest "output.mp4" ffmpeg -y -i "output.mp4" -filter_complex "[0:v]fade=in:0:d=5" -c:a copy -preset (...)
• 10:00
  ffmpeg scale down video dynamically (squeeze-back) or zoompan out to smaller than original - Sam Newest 'ffmpeg' Questions - Stack Overflow
  I have 2 videos, I'm trying to overlay one on top of the other, and have it shrink down in an animated fashion until it appears like a picture-in-picture setup. Then, after a few seconds it should scale back up. This is what I am trying to achieve (these would be videos, not images): This is the closest I've been able to get, but, crucially, zoompanning "out" (as opposed to "in") does not appear to work; so, of course, this does not work: ffmpeg -i bg.mov -i top.mov -filter_complex "[0:v]zoompan=z='pzoom-0.1':d=1, setpts=PTS-STARTPTS[top]; (...) --

Revisions : blueimp/jQuery-File-Upload - GitHub https://github.com/blueimp/jQuery-File-Upload

• 09:54
  10.31.0 - blueimp Revisions : blueimp/jQuery-File-Upload - GitHub
  10.31.0
• 09:53
  Update dev dependencies. - blueimp Revisions : blueimp/jQuery-File-Upload - GitHub
  Update dev dependencies.
• 09:41
  Update blueimp Gallery template. - blueimp Revisions : blueimp/jQuery-File-Upload - GitHub
  Update blueimp Gallery template.

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

• 07:36
  libavfilter - inputs and outputs confusion in avfilter_graph_parse_ptr - Rahul Newest 'ffmpeg' Questions - Stack Overflow
  I am learning libavfilter library. I have used transcoding.c and filtering_video.c examples from the ffmpeg source code. They are working fine and I understood everything except one part. I have some confusion between inputs and outputs parameters of the avfilter_graph_parse_ptr If you look at here, I was expecting buffersink to go in the outputs parameter and buffersrc to the inputs. But it does it in reverse - as if inputs are outputs of the filter graph. https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/transcoding.c#L340 Same done here in another (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/transcoding.c#L340, https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/filtering_video.c#L149
• 02:17
  ffmpeg - converting webm videos generated by Chrome is slow - Nuthinking Newest 'ffmpeg' Questions - Stack Overflow
  I generate webm files in two different ways. One using Chrome WebRTC MediaRecorder, the other one is using a js library which generates the webm video frame by frame (webm-writer-js). The file size of the videos generated is not that different, the fast one is 60% of the slow one but the difference in speed is 1000% Using the basic ffmpeg syntax -i input.webm output.mp4 the files created with Chrome's media recorder take in fact almost 10x time to be converted. The conversion logs differ slightly but overall look very similar to my novice eyes. On the left the fast (...) -- webm-writer-js,
• 00:25
  Convert video.ts file into video.mp4 using ffmpeg - HorizonBloom Newest 'ffmpeg' Questions - Stack Overflow
  So I tried to convert a file named video.ts into video.mp4 in Python and am getting the error: FileNotFoundError: [WinError 2] The system cannot find the file specified Assuming video.ts is already loaded into the program and subprocess already imported. This is due to the line: >>> subprocess.run(['ffmpeg', '-i', 'video.ts', 'video.mp4']) but I don't know what's the problem. I've opened the video.ts file and it seem to be working fine. Python version (...)

10 July

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

• 17:53
  libavfilter/glslang: Remove unused header - Ben Clayton git.videolan.org Git - ffmpeg.git/rss log
  libavfilter/glslang: Remove unused header The <glslang/Include/revision.h> include was not used, and revision.h has been removed from glslang master. See: https://github.com/KhronosGroup/glslang/pull/2277 [DH] libavfilter/glslang.cpp
• 23:04
  avfilter/vf_chromanr: move thres calculation to filter_frame() - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_chromanr: move thres calculation to filter_frame() [DH] libavfilter/vf_chromanr.c
• 19:37
  avcodec/cbs_jpeg: Fix uninitialized end index in cbs_jpeg_split_fragment() - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  avcodec/cbs_jpeg: Fix uninitialized end index in cbs_jpeg_split_fragment() Fixes: Out of array read Fixes: 24043/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5084566275751936.fuzz Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michaelⓐniedermayer.cc> [DH] libavcodec/cbs_jpeg.c
• 17:14
  avcodec/tiff: Check input space in dng_decode_jpeg() - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  avcodec/tiff: Check input space in dng_decode_jpeg() Fixes: out of array read Fixes: 24034/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5111884337119232 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michaelⓐniedermayer.cc> [DH] libavcodec/tiff.c
• 00:31
  avcodec/mjpeg_parser: Adjust size rejection threshold - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  avcodec/mjpeg_parser: Adjust size rejection threshold Fixes: 86987846-429c8d80-c197-11ea-916b-bb4738e09687.jpg Fixes: Regression since ec3d8a0e6945fe015d16cd98a1e7dbb4be815c15 Signed-off-by: Michael Niedermayer <michaelⓐniedermayer.cc> [DH] libavcodec/mjpeg_parser.c

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

• 16:45
  Accessing SRT transport statistics using ffmpeg - martyn Gilbert Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg built with SRT and am successfully able to send video stream to the destination using SRT. I am wondering if it is possible to get access to the statistics from the SRT connection such as packets sent, packets lost, packets re-transmitted etc. The SRT demo application srt-live-transmit outputs these statistics to the console while running e.g. ======= SRT STATS: sid=226392826 PACKETS SENT: 0 RECEIVED: 514 LOST PKT SENT: 0 RECEIVED: 0 REXMIT SENT: 0 RECEIVED: 0 DROP PKT SENT: 0 RECEIVED: 0 RATE SENDING: 0 RECEIVING: 4.5198 BELATED (...)
• 16:32
  Using ffmpeg to assemble images from S3 into a video - Mass Dot Net Newest 'ffmpeg' Questions - Stack Overflow
  I can easily assemble images from local disk into a video using ffmpeg and passing a %06d filespec. Here's what a typical (pseudocode) command would look like: ffmpeg.exe -hide_banner -y -r 60 -t 12 -i /JpgsToCombine/%06d.JPG However, I'm struggling to do the same with images stored in AWS S3, without using some third party software to mount a virtual drive (e.g. TNTDrive). The S3 folder containing our images is too large to download to the 20GB ephemeral storage provided for AWS containers, and we're trying to avoid EFS because we'd have to provision (...) -- AWS S3, TNTDrive, EFS, FFMPEG concat filter
• 16:17
  no difference between h264 and h264_cuvid - Ruslan Ablyazov Newest 'ffmpeg' Questions - Stack Overflow
  I use libav to decode an RTSP stream. I tried two code options: with auto codec selection and with hardcoded codec. pCodec = avcodec_find_decoder (pFormatCtx->streams[p_InputVideoStreamIndex]->codecpar->codec_id); //pCodec = avcodec_find_decoder_by_name ("h264_cuvid"); LOG (info) name long_name? PCodec->long_name: ""); The avcodec_find_decoder() function returns h264 codec. The problem is that the speed and load on the CPU when using h264 is no different from h264_cuvid. What could be the reason? When I use h264_cuvid, the video card is loaded by 2-3% more.  (...)
• 15:35
  Google Colan installs ffmpeg very slowly - apegdro Newest 'ffmpeg' Questions - Stack Overflow
  I'm using the command '!apt install ffmpeg' and each time I run it in Google Colab it takes anywhere from 10 to 30-40 minutes to finish loading/installing. Anyone got a clue on why is that? And possibly how to fix it? Everything else I run loads in a matter of seconds or a few minutes.
• 14:09
  Edited video produces smaller image that original, even with higher resolution - ceperman Newest 'ffmpeg' Questions - Stack Overflow
  I've a .ts format recording from my Humax, which completely fills the window horizontally when played with VLC. In full-screen it fills the screen horizontally in letterbox style, and the same on the TV when played through my PS/3. All good so far. This is the ffprobe output: Duration: 02:16:37.72, start: 74238.902878, bitrate: 2554 kb/s Stream #0:0[0x931]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 704x576 [SAR 16:11 DAR 16:9], max. 15000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc I used ffmpeg to change the audio track: ffmpeg -i movie.ts (...)

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

• 14:20
  Anomalie #4517: Minipres "site en travaux" return un code 200 - PIerre LASZCZAK Revisions : SPIP
  Wouah! c'est rapide. merci!
• 13:37
  Anomalie #4517 (Fermé): Minipres "site en travaux" return un code 200 - b b Revisions : SPIP
  Corrigé par https://git.spip.net/spip/spip/commit/37bd9372379b81ffc68eebd5a7906e0ac14098be
• 13:33
  Anomalie #4517 (En cours): Minipres "site en travaux" return un code 200 - b b Revisions : SPIP
  Le patch suivant devrait régler le problème, tu confirmes ? diff --git a/ecrire/inc_version.php b/ecrire/inc_version.php index c77eaebb60..64cfc7c84b 100644 --- a/ecrire/inc_version.php +++ b/ecrire/inc_version.php ⓐⓐ -536,7 +536,7 ⓐⓐ if (!(_FILE_CONNECT // Si on est dans le site public, dire que qq s'en occupe include_spip('inc/minipres'); utiliser_langue_visiteur(); - echo minipres(_T('info_travaux_titre'), " " . _T('info_travaux_texte') . ""); + echo minipres(_T('info_travaux_titre'), " " . _T('info_travaux_texte') . "", array('status' => 503)); exit; // autrement c'est une install ad (...)
• 13:17
  Anomalie #4518 (Nouveau): changement de langue d'un article si déplacement dans une autre rubrique - denis - Revisions : SPIP
  Nous travaillons avec des articles dans plusieurs langues gérés avec des liens de traduction. La langue par défaut du site est [en] et donc par défaut les rubriques sont en [en]. Dans chaque rubrique, nous créons des articles qui ont leur propre langue [en,fr,nl] et des liens de traductions. Mais si l'on déplace un article vers une autre rubrique, il transforme automatiquement sa langue en [en] SPIP 3.2.7
• 12:43
  Anomalie #4517 (Fermé): Minipres "site en travaux" return un code 200 - PIerre LASZCZAK Revisions : SPIP
  Bonjour, Lorsqu'un site spip est prêt pour une nouvelle installation, minipres return un code HTTP 200 Vous semble-t-il pertinent de retourner un code 503? Merci!

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

• 12:57
  FFMPEG zoompan for continuous zoom in/zoom out from start duration - Nikhil Solanki Newest 'ffmpeg' Questions - Stack Overflow
  I am creating continues zoomin/zoomout effect for input image using this command: ffmpeg -i combine.mp4 -i image1.jpg -filter_complex "[0]split=2[color][alpha]; [color]crop=iw/2:ih:0:0[color]; [alpha]crop=iw/2:ih:iw/2:ih[alpha]; [colo][alpha]alphamerge[v1]; [1]scale=540*2:960*2, setsar=1, zoompan=z='if(lte(zoom,1.0),1.02,max(1.001,zoom-0.0015))':d=25*0.25:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':s=540x960[v2]; (...)
• 11:11
  FFMPEG creating puzzle pieces video from an image - Nikhil Solanki Newest 'ffmpeg' Questions - Stack Overflow
  I am creating puzzel solving video of a picture. My output must be in w540:h960 and divided puzzel pieces(image pieces) into 4*4=16 pieces puzzel. So, after referring this answer I also followed that: ffmpeg -i background.jpg -i image1.jpg -t 14 -filter_complex "[0]scale=540:960[bg]; [1]split=16[a][b][c][d][e][f][g][h][i][j][k][l][m][n][o][p]; [a]crop=iw/4:ih/4:0*iw/4:0*ih/4[a]; [b]crop=iw/4:ih/4:1*iw/4:0*ih/4[b]; [c]crop=iw/4:ih/4:2*iw/4:0*ih/4[c]; [d]crop=iw/4:ih/4:3*iw/4:0*ih/4[d]; [e]crop=iw/4:ih/4:0*iw/4:1*ih/4[e]; [f]crop=iw/4:ih/4:1*iw/4:1*ih/4[f]; [
• 10:59
  How to send RTP stream to Janus from NGINX RTMP module? - Matéo Newest 'ffmpeg' Questions - Stack Overflow
  This is my first post here, even though this platform has already helped me a lot. So, i'm trying to create a stream and display it in a browser. I have already configured NGINX with the rtmp module and my stream works very well with HLS (between 5 and 10 seconds of latency). Now I would like to set up a low-latency stream and that's why I have installed the janus-gateway webRTC server that allows to take in input an RTP stream and provide in output a webRTC stream. Here's the schema I'd like to follow : OBS -> RTMP -> Nginx-rtmp-module -> ffmpeg -> (...)
• 10:53
  Create dash manifest-file for mp4-videos - Werner Newest 'ffmpeg' Questions - Stack Overflow
  I took a video and created 3 versions of it in different sizes (including a watermark, no audio here) with: ffmpeg -i "input.mov" -i "watermark.png" -an -c:v libx264 -x264opts "keyint=24:min-keyint=24:no-scenecut" -b:v 2400k -maxrate 2400k -bufsize 1200k -filter_complex "overlay=24:960,scale=640:480" -y "output_640_480.mp4" ffmpeg -i "input.mov" -i "watermark.png" -an -c:v libx264 -x264opts "keyint=24:min-keyint=24:no-scenecut" -b:v 3200k -maxrate 3200k -bufsize 1600k -filter_complex "overlay=24:960,scale=800:600" -y "output_800_600.mp4" ffmpeg -i "input.mov" -i (...)
• 10:13
  Truncated prog_index.m3u8 in fluent-ffmpeg - Hassnain Alvi Newest 'ffmpeg' Questions - Stack Overflow
  I am creating a master playlist using fluent FFmpeg but the result prog_index.m3u8 contains last few entries it doesn't include full playlist data Here is the code for generating playlist const bitrate64 = ffmpeg("file.mp3").audioBitrate('64k'); bitrate64.outputOptions([ '-preset slow', '-g 48', "-map", "0:0", '-hls_time 6', '-master_pl_name master.m3u8', '-hls_segment_filename 64k/fileSequence%d.ts' ]) .output('./64k/prog_index.m3u8')  (...)
• 08:52
  FFmpeg "piping" doesn't work with mp4 files? - stlaza Newest 'ffmpeg' Questions - Stack Overflow
  I try the answer from this post and works very well for .webm format. I also try this implementation for mp4 file frames extraction and I got no bytes in stdout. Is there any solution to solve this issue?
• 07:48
  ffmpeg filter_complex concat never completes - seawolf Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to concatenate mp4 files into a single file. I am attempting to use the concat filter directly for reasons independent from this question (so -i list.txt is not a valid solution). All video files in question are between 4 and 20 minutes in length. What I am executing: % ffmpeg -i f01.mp4 -i f02.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" output.mp4 This is my understanding of the form of this command from references such as FFmpeg Filters Documentation: concat and Concatenate Videos Together Using FFMPEG!.  (...) -- FFmpeg Filters Documentation: concat, Concatenate Videos Together Using FFMPEG!
• 03:50
  How to convert RGB to YUV with ffmpeg - Amitrakshar Biszz Newest 'ffmpeg' Questions - Stack Overflow
  I Rendered Some Frames From Blender 3D in png 8-bit Format. There was an ALPHA Channel too! I was Looking for a Way to Convert those RGB Images to YUV.... So I Googled and after tens of hours I found a in which Colors stay the same! Wait, this is not the end of the story.... The Problem is I used a FFmpeg Script (which worked FINE, remember there was a Alpha channel at Input Images), That one below... But I Don't Understand Parts of it.... Well I can Guess what those can mean... ffmpeg -i "%04d.png" -vcodec libx265 -preset slow -crf 18 -pix_fmt yuv420p10le -vf (...) -- Colorspace - FFmpeg Trac/Wiki
• 02:44
  Can javascript MSE play segmented mp4 from the middle? - Elias Wagnerberger Newest 'ffmpeg' Questions - Stack Overflow
  in my current project i have a video stream that ffmpeg encodes to a segmented mp4. that encoded data is piped into an application that sends that data to whomever connects to that application through a websocket. when a client connects i make sure to send the ftyp and the moov boxes first and then send the most recent segments recieved from ffmpeg. on the client side i just pass all binary data from the websocket to MSE. The problem i am facing is that this works if the client is connected from the very start and gets all the fragments that ffmpeg pipes out, but it does not (...)