30 avril

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

• 19:43
  Error transcoding with FFmpeg: Error: Output format hls is not available - asif mohmd Newest 'ffmpeg' Questions - Stack Overflow
  I can successfully transcode videos to multiple resolutions with ffmpeg without using hls commands in .outputOptions. However, an error titled "Error transcoding with FFmpeg: Error: Output format hls is not available" appears when I try to include HLS in that. I updated to the most recent version of ffmpeg. verified that it possesses hls. ffmpeg static was tried. Not working at all.updated version installed. FFMpeg static was tried. Why does it say "There is no output format available in hls"? my ffmpeg installed in C i will provide my full code: Note:In Mac this code (...)
• 18:24
  How to apply the same FFMPEG slide transition for every slide in a sequence? - will Newest 'ffmpeg' Questions - Stack Overflow
  I have an ffmpeg command to create an MP4 video from a sequence of N x JPEG slides. That is, I do not know how many slides there are in the sequence, it is just a directory of JPEG-s. I'd like to apply a common slide transition for every slide in the sequence. All the examples I've read seem to need to know how many slides there are before the filter is written. The idea is to use one (simple) transition/filter for every slide. So far the script looks like this: play_duration="-framerate 1/10" # 10 seconds for testing ffmpeg \\ $play_duration \\  (...) -- How to Create a Slideshow from Images using FFmpeg
• 17:38
  (C_UDP Socket Programming) How can I convert binary file to video format? - user24723398 Newest 'ffmpeg' Questions - Stack Overflow
  I am practicing UDP socket programming. My code's functions are below. Connect Server-Client and send "hello" message each other (it is working). Then Server is sending video file to client (problem). Transfer video file to client is working. But it is written in binary so I can't open the video. So I try to use ffmpeg to convert the video, but it doesn't work. Is there something wrong in my code? How can I transfer a received file to a video file? My environment is MacOs. Server.c (Server Code): #include #include (...)
• 16:44
  How to create an MP4 from images - King Saozer Newest 'ffmpeg' Questions - Stack Overflow
  I would like to merge all the *.png* images into a single .mp4 video file. But the file does not read on windows.11 Media Player I tried this command ffmpeg -y -i "screenshots/*.png" "screenshots/merged/video.mp4"
• 16:42
  Error when concatenating video files from different sub directories using ffmpeg in win10 command prompt? - Roasty247 Newest 'ffmpeg' Questions - Stack Overflow
  I have thousands of videos that are written by a device (RP116) in structured subfolders: device > date > hour > minute.mp4 Every folder has up to 60 minute-long videos. I would like to combine them into a single .mp4 file with ffmpeg in windows command prompt. I can do this within a single folder with the following: C:\\Users\\mjroa\\Desktop\\RP116\\20220513\\20>(for %i in (*.mp4) do ⓐecho file '%i') > mylist.txt ffmpeg -acodec aac -hide_banner -f concat -i mylist.txt -c copy test.video.concat.mp4 The text file is in the format: file (...)
• 16:41
  Muxing H264 packets into a MPEGTS container using libav* - Lucen Newest 'ffmpeg' Questions - Stack Overflow
  I'm writing a C++ program where I need to encode packets in h264 format and mux them to a MPEG TS container. For the encoding part, I based my code on the encode_video example (https://ffmpeg.org/doxygen/trunk/encode_video_8c-example.html#a9) provided in FFMPEG documentation, and it seems to work fine. In particular, I generate a std::vector of packets which I sequentially write to an output .ts file for debug. Such .ts file plays fine with SMPlayer, and a ffproba command gives >> ffprobe -print_format json -show_format -show_streams out.ts Input #0, h264, from (...) -- https://ffmpeg.org/doxygen/trunk/encode_video_8c-example.html#a9, https://ffmpeg.org/doxygen/trunk/mux_8c-example.html
• 16:03
  HLS. FFmpeg: error when loading first segment - rus_99_pk Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to download a streaming video using ffmpeg. There is a file in the format *.m3u8. BUT, if everything was so simple, I would not have come here. There are a number of nuances: It cannot be downloaded by specifying a link to the file If you upload the file and look at its contents, there will be: #EXT-X-KEY:METHOD=AES-128,URI="[KEY],IV=[IV] With a URI, the task is easy to solve; just specify the value list.m3u8. I end up getting: Error when loading first segment (...) -- Trace log
• 15:47
  RTSP server: setting the window title when using ffplay to stream from an RTSP url - tamirg Newest 'ffmpeg' Questions - Stack Overflow
  I have an RTSP server running, and when im calling ffplay and streaming a video from that server, there's a specific title for this window. i know i have the -window_title param for ffplay, but i want to know if its possible to change that name from the RTSP server side? when running the RTSP server is there anyway to set the "name" that would be shown whenever someone is streaming using ffmpeg?
• 15:06
  Why does my script return 0 when it fails? Bash, Whisper, ffmpeg - d-b Newest 'ffmpeg' Questions - Stack Overflow
  I have a bash script that executes whisper on all sound files in a directory. Whisper uses ffmpeg to decode sound files to a format it can handle. One of the files in the directory was corrupt and caused ffmpeg to fail. The first time I executed my script it returned 1 when it hit that file but when I try to reproduce the error it always returns 0. Here is the log from the first run when 1 was returned: Traceback (most recent call last): File "/Users/db/Library/Python/3.11/lib/python/site-packages/whisper/audio.py", line 48, in load_audio .run(cmd=["ffmpeg", (...)
• 11:32
  FFmpeg - HLS MUXER producing 0 bytes chunks as well as ) bytes manifest [closed] - Mohideen Irfan Newest 'ffmpeg' Questions - Stack Overflow
  My ffmpeg code produces 0 bytes chunks as well as 0 bytes manifest. can someone tell what may be the cause for that. AVPacket contains the data too. Whether the data is valid or not valid that's off-topic here, right? As it writes any data into the muxer right? But why I am receiving ffmpeg log like: [hls ⓐ 0x617000084280] write_packet_common size:128 dts:192060 pts:192060 [hls ⓐ 0x617000084280] compute_muxer_pkt_fields: pts:192060 dts:192060 cur_dts:186030 b:0 size:128 st:1 [hls ⓐ 0x617000084280] av_write_frame: pts2:192060 dts2:192060 [hls ⓐ 0x617000084280] Opening (...)
• 13:36
  FFmpeg produces empty file sometimes - Matan Malka Newest 'ffmpeg' Questions - Stack Overflow
  I am currently using ffmpeg and attempting to convert multiple PNG files to MP4 video. My command is: ffmpeg -y -r 10 -i "videos-reporter/MC4xMzg3NDI1MTY2Mjg1MTk=/b8a7ee17d8ecfd199edbc5edc9691698/screenshots/%04d.png" -vcodec libx264 -pix_fmt yuv420p -vf "scale=1200:trunc(ow/a/2)*2","setpts=3.0*PTS" "videos-reporter/MC4xMzg3NDI1MTY2Mjg1MTk=/b8a7ee17d8ecfd199edbc5edc9691698/video.mp4" Sometimes, I'm unsure when the ffmpeg creates a 1kb empty video file that cannot be played. [0-1] stderr: ffmpeg version N-47683-g0e8eb07980-static (...)
• 10:57
  HLS audio stream choppy in iOS and Mac Safari - but ok in Chrome, VLC - Elliot Newest 'ffmpeg' Questions - Stack Overflow
  I have an HLS stream that seems to have the audio cut out and then return randomly. This only occurs on iOS devices, and Safari on Mac OS. It works fine on Desktop VLC, but not iOS VLC (as in, the audio never cuts out). More confusing still - if we have multiple developers listening to the same HLS stream on different devices at the same time, we all hear the audio cut out and the return at the same time. So clearly something is wrong with the stream itself. We create a dash stream from FFMPEG, and then create an HLS manifest in parallel. transcoder // Right now this (...)
• 10:33
  FFmpeg uses xface to merge videos without transition effects - soapbar Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -i ./first.mp4 -i ./first.mp4 -filter_complex "xfade=transition=circlecrop:duration=1:offset=4,format=yuv420p" -y output.mp4 FFMPEG version 6.1.1, the video is generated normally without any error prompts, but the generated video does not have any transition effects. output ffmpeg version 6.1.1-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2023 the FFmpeg developers built with Apple clang version 11.0.0 (clang-1100.0.33.17) configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig (...)
• 09:42
  how to receive livestream chats from different platforms using rtmp? - rutujp78 Newest 'ffmpeg' Questions - Stack Overflow
  I want to create StreamYard clone, I knew till the part where we can start the livestream for multiple platform at once using RTMP links and ffmpeg, but I want to know to receive chats from platform. I did livestream on YT and Insta but not able to figure out the chats part. import http from 'http' import path from 'path' import spawn from 'child_process' import express from 'express' import Server as SocketIO from 'socket.io' const app = express(); const server = http.createServer(app); const (...)
• 09:12
  How to create video from a stream webcam and canvas? - Stefdelec Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to generate a video on browser from different cut: Slide: stream from canvas Video: stream from webcam I just want to allow user to download the video edit with slide1 + video1 + slide2 + video2 + slide3 + video3. Here is my code: const canvas = document.getElementById('myCanvas'); const ctx = canvas.getContext('2d'); const webcam = document.getElementById('webcam'); const videoPlayer = document.createElement('video'); videoPlayer.controls = (...) -- https://jsfiddle.net/Sulot/nmqf6wdj/25/
• 02:13
  Forwarding an RTSP stream from IP camera to youtube [closed] - cbake Newest 'ffmpeg' Questions - Stack Overflow
  I have an IP camera (Foscam FI9800P) capable of sending an RTSP stream (I've confirmed using VLC the stream works). I want to stream the video from that camera to youtube. I'm guessing the camera can't send it to youtube directly, so I need a device in the middle. Something like: IP Camera --> Raspberry Pi --> Youtube live Ideally I'd like to do this without re-encoding the video along the way. ffmpeg appears to be able to do this, but it has many options and I haven't been able to figure out all its command line options.  (...)
• 07:07
  How to slide mutiple images left continuously? - mikezang Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg to slide images from left to center as below: #slide 1st image from right to center #countdown 10 seconds #slide 1st image from center to left and in the same time #slide 2nd image from right to center #countdown 10 seconds #... ffmpeg -loglevel quiet -loop 1 -i input.png -filter_complex "split=2[bg][slider];[bg]drawbox=c=black:t=fill[bg];[bg][slider]overlay=x='max(W-w*t,0)':y=0" -t 10 -y output.mp4 There is black background between two images, I want to the preious page keep slide from center to left and next page slide (...) --
• 07:06
  The bot doesn't play music (discord.py) - Naydar Newest 'ffmpeg' Questions - Stack Overflow
  The code works fine, but when using the command in guild the bot enters the voice channel but doesn't play music, immediately console gives: ffmpeg process 56560 successfully terminated with return code of 3199971767. import discord import youtube_dl import ffmpeg import requests from discord.ext import commands class music(commands.Cog, name = 'music'): def __init__(self, bot): self.bot = bot self.is_playing = False self.is_paused = False self.music_queue = [] self.YTDL_OPTIONS = 'format': (...)
• 04:33
  ffmpeg: Could not find tag for codec none in stream #1, codec not currently supported in container - Kracozebr Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record video from my ip camera stream with ffmpeg in command line fmpeg -rtsp_transport tcp \\ > -i rtsp://192.168.0.250/stream1 \\ > -c copy \\ > -map 0 \\ > -f segment \\ > -segment_time 60 \\ > -segment_format mp4 \\ > "/home/video/stream-%010d.mp4" and got the next output: ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu (...)
• 04:17
  Transcode to webm utilizing multiple threads / processors - ensnare Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to utilize my multiple processors for my webm conversion but no matter what I do the process is single-threaded and takes forever. Is this possible? Any sample conversion strings? -threads 8 Just gets ignored. Thanks.
• 03:59
  ffmpeg merge audio and video from ytdl-core, outputs an mp4 with no time (no seekable) - Andreu Newest 'ffmpeg' Questions - Stack Overflow
  i'm trying to merge video and audio from ytdl-core with ffmpeg and export it to user in mp4. The output video apears without time (inifit duration) and can not seek or navigate to another point of the video. app.get('/downloadmp4', async (req, res)=> let url = req.query.url; if (!ytdl.validateURL(url)) return res.sendStatus(400); let title = 'video'; let info = await ytdl.getInfo(url); title = info.videoDetails.title.replace(/[^\\x00-\\x7F]/g, ""); res.header('Content-Disposition', `attachment; (...)
• 03:42
  fluent ffmpeg => how to trim and concate parts of video into one output file without writing many output files. Make a most efficient solution - Shreyansh Gupta Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently working on a online video website and i need to make a quick preview of videos using random timestamps and duration of the video. Suppose the video is of 15 min then i want to cut out some parts like -> 1. from 00:00:40 take out next 2s 2. from 00:01:20 take out next 2s 3. ... and so on until the new video becomes 15s How can i do this with fluent-ffmpeg in the nodejs project Can i get the most efficient way of doing this without writing many output files and then concating them separately and removing then later Only concating the (...)

29 avril

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

• 22:14
  Resampling function produces audio with noise - kitty uwu Newest 'ffmpeg' Questions - Stack Overflow
  I have function for resampling one channel of audio (as a float array): int resample_and_save(float *audio_input, int input_sample_rate, int output_sample_rate, int input_num_of_samples, const char *output_file) AVChannelLayout ch_layout = AV_CHANNEL_LAYOUT_MONO; SwrContext *swr_ctx = swr_alloc(); uint8_t* resampled_data = NULL; float *audio_output = NULL; int ret = 0; if (!swr_ctx) fprintf(stderr, "Could not allocate resampler context\\n"); return -1; av_opt_set_chlayout(swr_ctx, "in_chlayout", &ch_layout, 0);  (...)