10 July

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

• 18:52
  Convert video.ts file into video.mp4 using ffmpeg - HorizonBloom Newest 'ffmpeg' Questions - Stack Overflow
  Edit: To anyone having this problem, download ffmpeg (will usually be in a zip), extract, go inside bin directory, and copy path (eg. location of folder\\ffmpeg\\bin). Then type in environment variables in start menu, add this path to the variable named PATH and save. DONE! 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: >>> (...)
• 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 (...)
• 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 (...)

9 July

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

• 23:52
  FFMPEG: Controlling overlay through ZeroMQ in ffmpeg - Michel Newest 'ffmpeg' Questions - Stack Overflow
  For a project we need to manually control an overlay (static image) on top of a video stream. We concluded that we will need ZeroMQ to control this, and we've managed to control an audio filter successfully through ZeroMQ. To achieve this we've considered two options: Use a color filter to control the foreground (image) transparency "Move" the overlay image in front of the video stream, and remove it out of the video canvas We've managed to get both working, but not in combination with ZeroMQ, unfortunately. Example: ffmpeg -loglevel (...)
• 23:35
  FFMPEG: Controlling overlay through zmq in ffmpeg - Michel Newest 'ffmpeg' Questions - Stack Overflow
  For a project we need to manually control an overlay (static image) on top of a video stream. We concluded that we will need zqm to control this, and we've managed to control an audio filter successfully through zqm. To achieve this we've considered two options: Use a color filter to control the foreground (image) transparency "Move" the overlay image in front of the video stream, and remove it out of the video canvas We've managed to get both working, but not in combination with zqm, unfortunately. Example: ffmpeg -loglevel verbose (...)
• 23:21
  Transcode HLS segments individually with FFMPEG - Mathix420 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to transcode a video in HLS, by first splitting the video in segments without encoding changes and then transcode all segments individually. I'm trying to achieve this so I can transcode a video in multiple EC2 instances in parallel to be more time efficient. I am using this scipt right now # Split input file in multiple segments ffmpeg -hide_banner -y -i $input -c copy -map 0 -an -segment_time 4 -reset_timestamps 1 -f segment output%03d.webm # Transcode each segments in multiple resolutions find . -name 'output*.webm' (...)
• 23:16
  ffmpeg resulting in no audio and unplayble video - Chris James Champeau Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to get ffmpeg to work as expected however I am having all kinds of trouble getting it to work. I need to output a webm and h264 for web play. However, the command I am using, while it used to work a few years ago, does not work at all now. Both my webm and h264 do not have audio, and neither will play in any browser. My command for webm is: ffmpeg -y -i "$KMVAR_File" -c:v libvpx -crf 24 -b:v 1000k -vf scale=720:-2 -c:a libvorbis "$KMVAR_webmPath" and my command for mp4 is: ffmpeg -y -i "$KMVAR_File" -c:v libx264 -pix_fmt yuv420p -profile:v (...)
• 22:28
  How is frame data stored in libav? - Wesley S Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to learn to use libav. I have followed the very first tutorial on dranger.com, but I got a little confused at one point. // Write pixel data for(y=0; ydata[0]+y*pFrame->linesize[0], 1, width*3, pFile); This code clearly works, but I don't quite understand why, particulalry I don't understand how the frame data in pFrame->data stored, whether or not it depends on the format/codec in use, why pFrame->data and pFrame->linesize is always referenced at index 0, and why we are adding y to pFrame->data[0]. In the tutorial it says  (...)
• 20:47
  How to extract frames from the In-memory mp4 file (bytes buffer) in Python? - stlaza Newest 'ffmpeg' Questions - Stack Overflow
  Now, my solution extracts images with saving bytes on disk using OpenCV/FFmpeg: from fastapi import APIRouter, UploadFile, File ⓐrouter.post("/") def extract_stream_frames(stream: UploadFile = File(...)): temp_filename = os.path.join(tempfile.gettempdir(), str(uuid.uuid4()) + ".mp4") # print(stream.content_type) local_temp_file = open(temp_filename, "wb") local_temp_file.write(stream.file.read()) local_temp_file.close() try: images = video.sampling(local_temp_file.name, num_frames=Config.IMAGES_PER_STREAM) images = (...)
• 20:17
  ffmpeg create blank screen with text video - kalafun Newest 'ffmpeg' Questions - Stack Overflow
  I would like to create a video consisting of some text. The video will only be 0.5 seconds long. The background should just be some colour, I am able to create such video from a photo, but cant find anywhere how this could be done without a photo, just using text to create such video. Can you help me ? Thanks in advance
• 17:42
  Can I use R to trim a video, like I do with ffmpeg? - Tae Jin Hwang Newest 'ffmpeg' Questions - Stack Overflow
  I have several video files that I need to trim/cut (i.e., cut 00:05:00 - 00:10:00 among 2-hour-long video). I can trim/cut each video by using ffmpeg. However, since I have +100 video files that need to be trimmed, I would like to use R loop function to do it. I've found that there are several R packages that people use for video processing, such as imager or magick, but I cannot find a way to trim a video using R. Can you help me? (...)
• 03:32
  ffmpeg 'or' filter - what's the significance of red and blue? - BETLOG Newest 'ffmpeg' Questions - Stack Overflow
  I'm tinkering with various ffmpeg filters to help me visualise the magnitude of difference certain presets use, and I notice a couple of filters display a lot of certain primary colours. Specifically in this case: red and blue in an 'or' filter, and green in an 'and' filter. It seems useful to be able to tell WHICH input is being indicated, or to understand how the filters act in terms of sequence, and I'm hoping these colourations will help with this. Or at least I'd like to better understand whatever they do represent. In the (...) -- ,
• 17:22
  Android Studio - Append two videos but showing black screen - Darkhmar Newest 'ffmpeg' Questions - Stack Overflow
  First of all hello, When I add another mp4 file at the end of an mp4 file, the video looks completely black screen but I can get the video sounds. If I add a copy of a video to the end of it, I saw that there was no problem, but this is not a scenario I want. I am getting the "text relocations" error when merging with the FFmpeg library. (This problem is fixed when I change this library version, but I have other problems. Therefore, mp4parser is an alternative I see.) The piece of code that allows the videos to be merged is as follows. Thank you from now. private (...)
• 17:09
  Executing shell script on Google Cloud Functions - João Abrantes Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to encode .mp4 videos into hls using FFmpeg. I am using subprocess to call FFmpeg: def transcoder(data, context): """Background Cloud Function to be triggered by Cloud Storage. This generic function logs relevant data when a file is changed. Args: data (dict): The Cloud Functions event payload. context (google.cloud.functions.Context): Metadata of triggering event. Returns: None; the output is written to Stackdriver Logging """ try: input_filename = data['name'].split('/')[-1] #videos have no (...)
• 17:02
  Stream newly generated jpgs as mpegts with ffmpeg - Theodor Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate a mpegts stream from a jpg image that is continuously being overwritten, with the help of ffmpeg. In my current setup another program is writing the new images to an image called "cam0.jpg", with a framerate that varies between 1 to 20 fps, and I use this command to generate a mpegts stream ffmpeg -f image2 -framerate 20 -pattern_type none -stream_loop -1 -re -i cam0.jpg -f mpegts -c:v libx264 -preset superfast udp://127.0.0.1:23000 The stream works fine for a while when it suddenly stops without any obvious error or warning. I have figured out (...)
• 16:48
  Unable to load FFMpeg in file in laravel project - Hatim Ahmad Newest 'ffmpeg' Questions - Stack Overflow
  i'm trying to convert a varity of audio files into a specific audio type of my chossing on my laravel project. on my search i landed on a package called Laravel FFMpeg, i started with a fresh installation with laravel 6.2, and did the installation as it shows on github, as soon as i started using it i had this error : FFMpeg\\Exception\\ExecutableNotFoundException: Unable to load FFMpeg in file C:\\Users\\Hatim\\Desktop\\Projects\\Audio\\vendor\\php-ffmpeg\\php-ffmpeg\\src\\FFMpeg\\Driver\\FFMpegDriver.php on line 55 #0 (...)
• 16:01
  Make a Form with ffmpeg action - Yozuu Newest 'ffmpeg' Questions - Stack Overflow
  I would like to know if it would be possible to create a form with ffmpeg actions on a Rails application. Because there is not a lot of documentation on this. On my application, users can upload a video, but I would like those who can, through a form with for example radio button, to manipulate their video. For example by adding a Reverb effect on the audio. Or add audio over the video. But I can't find documentation on a form with ffmpeg. But how to link ffmpeg action in a form on rails ? If you have an example it will help me a lot. Thank you (...)
• 15:55
  FFMPEG MP3: showfreqs to binary file - Brian Newest 'ffmpeg' Questions - Stack Overflow
  I need to process frames inside an MP3 stream by freq and volume. Using FFProbe [1] I can dump binary data (hex format) using show_data, but I'm not sure how that data represent freq, and volume of the audio track. Using FFmpeg [2] I could generate a video showing freq and volume, but I need to process this data as a binary file, not as a video. eg. open (file_stream) > foreach (row as data) Freq and Volume videos generated from MP3: http://ffmpeg.org/ffmpeg-filters.html#toc-showfreqs ** showfreqs https://gist.github.com/seyoum/4455e9bed74241bfbd640a8083fd38b3 (...) -- http://ffmpeg.org/ffmpeg-filters.html#toc-showfreqs, https://gist.github.com/seyoum/4455e9bed74241bfbd640a8083fd38b3, http://ffmpeg.org/ffprobe.html, http://ffmpeg.org/ffmpeg.html
• 15:02
  av_hwdevice_iterate_types returns an empty list - Ruslan Ablyazov Newest 'ffmpeg' Questions - Stack Overflow
  I used an example https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/hw_decode.c The av_hwdevice_iterate_types function returns an empty list. What could be the reason? And avcodec_find_decoder_by_name("h264_cuvid") returns NULL. FFmpeg version: ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-ladspa --enable-libpulse --enable-libsoxr --enable-libspeex --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --enable-libass --enable-libfreetype (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/hw_decode.c
• 13:40
  How do i set total file duration generating a piped mp4 with ffmpeg? - Mikhail Novikov Newest 'ffmpeg' Questions - Stack Overflow
  My task is to generate (by piping, so that a file can be played at the same time with generation) an mp4 file which is a part of a larger file, with the result looking like a static file link, being seekable before it fully loads (i.e. supporting range headers). Here is how i do it now: ffmpeg -ss $1 -i /root/nextpro-livestream/replay/teststream_hls1_replay.mp4 -t $2 -timecode $3 -codec copy -movflags frag_keyframe+faststart -f mp4 pipe:1 Result is OK (video starts from the right point) except the player does not see the total duration of a file so a (...)
• 13:03
  Using FFMPEG to extract multichannel audio from Quicktime - Jonas Kvist Jensen Newest 'ffmpeg' Questions - Stack Overflow
  So I have a quicktime file with proxy video content and 8 audio tracks. I need to extract the audio into a single multichannel wave file. I think this is probably pretty simple, but I can't find the solution. What I have: ffmpeg -i input.mov -c:a copy output.wav This gives me just a single channel, so there must be some mapping issue going on.
• 12:12
  What is the internal difference between these two modes when getting the psnr value using ffmpg? - peter12 Newest 'ffmpeg' Questions - Stack Overflow
  Option: -psnr as H264 parameter ffmpeg -i input.mp4 -vf -codec:v libx264 -psnr -f mp4 -b:v 100k -pass 1 output.mp4 Option : Comparing input and output with the psnr filter. ffmpeg -i input.mp4 -vf -codec:v libx264 -f mp4 -b:v 100k -pass 1 output.mp4 ffmpeg -i output.mp4 -i input.mp4 -filter_complex psnr -f null –
• 11:57
  How use FFMPEG to merege multiple audios and videos with delay and offset for any streams - Morak Newest 'ffmpeg' Questions - Stack Overflow
  I want to use FFMPEG to merge multiple audios and videos. Materials are: three short audio clips (S1.mp4, S2.mp4, S3.mp4) without video(files only have audio stream), three video clips (V1.mp4, V2.mp4, V3.mp4) without sound(files only have video stream). I have start-time of all materials(i.e: start-time of "S1.mp4" is 0 sec... start-time of "S2.mp4" is 1220.5 sec... start-time of "S3.mp4" is 2500.12 sec... and start-time of "V1.mp4" is 15.22 sec... start-time of "V2.mp4" is 853.99 sec... start-time of "V3.mp4" is 2901.37 (...)
• 10:14
  ffmpeg video splitting less then 10 sec gives black clip - ubuntu 18.04 LTS - vipin Newest 'ffmpeg' Questions - Stack Overflow
  I am using FFmpeg version 4.3-2~18.04.york0 on AWS EC2 server for video splitting, while I split video less then 11 seconds the output.mp4 gives a blank video. I have tried the same thing with my local MAC and Ubuntu 19 but it works fine. ffmpeg -i input.mp4 -ss 00:01:10 -to 00:01:15 -c:v copy -c:a copy output.mp4
• 09:55
  video uploading from app using ffmpeg showing error - Dhananjay Acharya Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to implement video upload from app using ffmpeg. when I m trying to upload video showing this errors. sometime video upload keep on loading. any help. sometimes app freezes and for some videos showing out of memory error when i run in a real device logcat details 2020-07-09 12:48:14.240 5226-7065/com.mik I/OMXClient: MuxOMX ctor 2020-07-09 12:48:14.369 5226-5226/com.mik I/Choreographer: Skipped 32 frames! The application may be doing too much work on its main thread. 2020-07-09 12:48:14.377 5226-5857/com.mik D/AudioManager: getStreamVolume isRestricted (...)
• 09:44
  Recording transport stream to file in ffmpeg - Neil Bernard Newest 'ffmpeg' Questions - Stack Overflow
  I'm streaming a dvb-t mux and I want to dump it to file using ffmpeg on another PC. Here is the command: ffmpeg -i rtp://192.168.1.93:20000 -acodec copy -vcodec copy d34_tw.ts For some reason though its only saving 1 video and 1 audio random pid? not the whole TS? Thoughts? Neil
• 09:19
  Why does ffmpeg burn Chinese subtitles(ass) without word wrap？ - bjjoy Newest 'ffmpeg' Questions - Stack Overflow
  my ffmpeg burn subtitle example ffmpeg burn ass subtitle to mp4. The properties WrapStyle(0:word wrap, 1: the char '\\N' or movie edge force change line, 2: only \\n and \\N change line). English subtitle run OK. Chinese subtitle has no word wrap when WrapStyle=0. -- my ffmpeg burn subtitle example
• 07:41
  FFmpeg adding image watermark to video process is very slow - Tushar Lathiya Newest 'ffmpeg' Questions - Stack Overflow
  I am adding image watermark to video with help of FFmpeg but FFmpeg takes an inordinate amount of time with the below command- String[] cmd = "-i",videoPath, "-i", waterMark.toString(),"-filter_complex","overlay=5:5","-codec:a", "copy", outputPath; so i tried another command which was little bit faster but increase output file size(which i do not want) String[] cmd = "-y","-i", videoPath, "-i", waterMark.toString(), "-filter_complex", "overlay=5:5", "-c:v","libx264","-preset", "ultrafast", outputPath; Some one please explain to me how to (...)
• 05:44
  FFmpeg stream video to rtmp from frames OpenCV python - batata oussama Newest 'ffmpeg' Questions - Stack Overflow
  In the context of indistural project, i developed a real time application to detect person with AI algorithms. In local i get and display videos with OPENCV operating with frames. The objective is to realise a stream video from frames of Opencv to rtmp server FFmpeg seems a good perspective. However, often the stream strats from .mp4 or several .jpg to publish stream video on rtmp server. Thank you.