3 mai

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

• 04:27
  Error transcoding with FFmpeg: Error: Output format hls is not available - asif mohmd Newest 'ffmpeg' Questions - Stack Overflow
  I am using FFmpeg library to transcode a video file into multiple resolutions and create an HLS (HTTP Live Streaming) master playlist. It takes a video file as input but its does give me the output with HLS playlist.I got a error called "Output format hls is not available". Only the Output directory is creating I am using FFMpeg 7.0 full build version and also tried older versions and ffmpeg essentials and also tried chocolatey. if i remove the implementation of HLS from this code.it will create 4 different resolution videos in my output. Note:I just tried this same (...)

2 mai

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

• 12:57
  FFmpeg - MP4 file converted from PNG files is not playable [closed] - StamShamen Newest 'ffmpeg' Questions - Stack Overflow
  I am attempting to use FFmpeg and JavaScript to convert multiple PNG files to an MP4 video. However, sometimes the output video is not playable (1kb) and no error appears in the output. This is the command that I run: ffmpeg -y -r 25 -i "videos-reporter/123/screenshots/%04d.png" -c:v libx264 -preset medium -crf 20 -pix_fmt yuv420p -vf "scale=1200:trunc(ow/a/2)*2,setpts=3.0*PTS" -threads 4 "videos-reporter/123/video.mp4" Output of playable video: Input #0, image2, from (...)
• 21:18
  How to create chunks of videos (.ts) and .m3u8 file from a mp4 video? - Nafisur Ahmed Newest 'ffmpeg' Questions - Stack Overflow
  I need to create chunks of videos (.ts) of fixed duration (say 5 or 10 seconds) from a mp4 video. And also I need the chunks in different formats (260p, 480p, 720p, 1080p). I'm able to create the chunks and m3u8 using the command below: ffmpeg -i input.mp4 -g 60 -hls_time 10 out.m3u8 but not able to create for different resolutions as mentioned above.
• 21:03
  Output image twice in ffplay - Sun Tzun Newest 'ffmpeg' Questions - Stack Overflow
  I need to show two similar images from a webcam side-by-side. I can achieve this with this piped command, but it runs with a few seconds latency: ffmpeg -f dshow -i video="Logi C310 HD WebCam" -filter_complex "[0:v][0:v]hstack=inputs=2[v]" -map "[v]" -f matroska - | ffplay - I'd prefer to do the same in just ffplay. I'd also like to have the resulting image cropped to a square size or to the size of the original image (like if the picture from webcam gets divided by half and the halfs took each other places). What I need in this end is a tool that (...)
• 20:01
  Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (360p.m3u 8) has not been used for any stream. - Marc Archenault Newest 'ffmpeg' Questions - Stack Overflow
  I am receiving this warning from ffmpeg. The job runs and all the videos seem to output correctly. I have 2 hls, 1 mp4 with overlay + A single thumbnail. The warning: Stream #1:0: Video: png, rgba(pc), 500x38, 25 tbr, 25 tbn, 25 tbc Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (360p.m3u 8) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of s ome encoder which was not actually used for any stream. The windows (...)
• 18:52
  convert video to audio - ffmpeg - shakti goyal Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert video to audio using ffmpeg in flutter based application but command is not working. Is there something wrong with the command? void convert(File pickedVideo) async Directory applicationDocDirectory = await getApplicationDocumentsDirectory(); final outputPath = '$applicationDocDirectory.path/output-audio-$const Uuid().v1().mp3'; final session = await FFmpegKit.execute('-i $pickedVideo.path -vn -acodec mp3 $outputPath'); final returnCode = await session.getReturnCode();  (...)
• 15:01
  How trim last frames from old mp4 video and merge new to it in one ffmpeg command? [closed] - mikezang Newest 'ffmpeg' Questions - Stack Overflow
  I have a full time old mp4 video and a newest video, I want to trim frames from old video, then merge new to old trimed to build a new full video, can I do it in one ffmpeg command without reencode? Something like oldFull.mp4 - lastFrames) + new.mp4 = newFull,mp4 If old full frames are oldFrames, and want to remove last frames as removeFrames, how can I merge new.mp4 to OUT? ffmpeg -i IN -c copy -bsf:v noise=drop=between(n\\,removeFrames\\,oldFrames) (...)
• 14:24
  convert video to audio using ffmpeg - flutter - shakti goyal Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert video to audio using flutter ffmpeg kit package but it is returning ReturnCode 1 which is false this is the command Directory applicationDocDirectory = await getApplicationDocumentsDirectory(); outputPath = '$applicationDocDirectory.path/output-audio-$const Uuid().v1().mp3'; FFmpegKit.execute('-i $widget.pickedVideo.path -vn -ar 44100 -ac 2 -b:a 256k -f mp3 $outputPath'); is something wrong with the (...)
• 10:16
  When creating ffmpeg segments instead of "-t" I cannot move inside the resulting MP4 file [closed] - pavlii Newest 'ffmpeg' Questions - Stack Overflow
  We are using ffmpeg for grabbing X11 session and we had changed a bit the commant run. I will write only the different part of the command; the rest were maintained so are not important for this problem: ffmpeg ..... -t 00:14:58 (old command) ffmpeg ..... -f segment -segment_time 900 -strftime 1 (new command) Resulting files are (in both cases) MP4. But in new - using segments - variant I am able to open the file in VLC player as usual but I cannot do any location inside. So I have to wait for example 700s to see what had happened at that time - I cannot use VLC slider to (...)
• 13:34
  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 (...) --
• 13:05
  "fmpeg" has no attribute "input" - Robin Singh Newest 'ffmpeg' Questions - Stack Overflow
  I had previously built this youtube downloader but when I tested it recently; it stopped working. from pytube import YouTube import ffmpeg import os raw = 'C:\\ProgramData\\ytChache' path1 = 'C:\\ProgramData\\ytChache\\Video\\\\' path2 = 'C:\\ProgramData\\ytChache\\Audio\\\\' file_type = "mp4" if os.path.exists(path1 and path2): boo = True else: boo = False while boo: url = str(input("Link : ")) choice = int(input('Enter 1 for Only Audio and Enter 2 For Both Audio and Video \\n: (...)
• 12:54
  FFMPEG C Library: Encoding h264 stream into Matroska .mkv on MacOS - KaisoHHH Newest 'ffmpeg' Questions - Stack Overflow
  FFMPEG C Library: Encoding h264 stream into Matroska .mkv container creates corrupt files Above is the related question, and the answer of allocating memory for extradata of codec context works. But on MacOS, with the encoder videotoolbox, this approach creates corrupted video file for any container, including mp4 and mkv. But what it does better for mkv is that at least the corrupted file is not 0 size. I was wondering what is the correct way to encode stream to mkv on MacOS? Below is my code initiating the outputcodec auto path = previewPath.toStdString(); // (...)
• 10:19
  I was trying to render a gif over an video created from a single image by adding an audio stream, but the gif is not rendering [closed] - Madhur Arora Newest 'ffmpeg' Questions - Stack Overflow
  the gif is not rendering !ffmpeg -i /content/lipsync_facerefine_studio/assets/7cbdde.jpg -stream_loop -1 -i /content/lipsync_facerefine_studio/temp/c0703.gif -i /content/lipsync_facerefine_studio/lipsync/temp/48409e30-a572-42ac-9893-cf24f3cd866d.wav -filter_complex "[1]fade=in:st=0:d=2.5:alpha=1,scale=499.99999999999994:375.0[layer1];[0][layer1]overlay=x='if(lt(t,2.5),81.0-(w/2)+t*(w/5.0),81.0)':y=81.0:shortest=1[overlay1];" -map 2:a -map '[overlay1]' /content/lipsync_facerefine_studio/temp/temp.mp4 (...)
• 11:38
  encoding XDCAM MXF with FFMPEG [closed] - Mark Yang Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to encode to an XDCAM HD422 MXF file with FFMPEG. I've searched but cannot find the right command line arguments to use. What command line arguments are required to encode a XDCAM-compliant output file?

1er mai

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

• 22:51
  Python library to extract metadata from video file stored in variable, rather than on filesystem - Adam J. Kessel Newest 'ffmpeg' Questions - Stack Overflow
  Is there a standard solution for extracting metadata (like aspect ratio, codec, etc) from video data stored in a Python variable, rather than from a file on disk? I see people point most often to ffmpeg-python for video metadata analysis, but as far as I can tell, it can only operate on a filename rather than an object in memory. One possible workaround is to tell ffmpeg-python to use stdin pipe as input and then output the contents of the variable to that pipe, but this seems cumbersome. If ffmpeg-python accepted a file handle rather than filename, you could use BytesIO, but this (...)
• 23:03
  AWS MediaConvert generating double length video - user1hjgjhgjhggjhg Newest 'ffmpeg' Questions - Stack Overflow
  I am new to aws media convert. I am trying to convert the video but the final output video becomes double the length from the original one. for example if I have a video 30 seconds long, it will create 60 seconds long final video. Below is my son. "Queue": "arn:aws:mediaconvert:us-west-2:730335xxxxx:queues/Default", "UserMetadata": , "Role": "arn:aws:iam::73033541xxxx:role/service-role/MediaConvert_Default_Role", "Settings": "TimecodeConfig": "Source": "ZEROBASED" , "OutputGroups": [ "Name": "DASH ISO", "Outputs": [  (...)
• 11:16
  List of FFMPEG audio formats and their file extensions - vaid Newest 'ffmpeg' Questions - Stack Overflow
  I've tried to find information about this but to no avail. What audio formats and their file extensions are supported by FFMPEG? Is there a command that can list them all?
• 09:33
  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/

30 avril

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

• 16:42
  Error when concatenating video files from different sub directories using ffmpeg in win10 command prompt? [closed] - 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 (...)
• 16:03
  HLS. FFmpeg: error when loading first segment [closed] - 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
• 16:44
  How to create an MP4 from images [closed] - 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"
• 21:59
  Why does a command in my Bash-script return 0 even when it fails? Python, 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", (...)
• 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 (...)
• 16:41
  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
• 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 (...)
• 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.  (...)
• 07:06
  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);  (...)
• 19:23
  Ffmpeg cpp libav randomly uses high cpu and less gpu or uses high gpu and less cpu with hw accel - cngkyt Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg as library with cpp the integration of library is perfectly done i am using AVFilterGraph as audio resampler and video pixfmt converter. I cannot share code because it is a complete library and contains too many files but i can assure there is no problem about code but maybe approach. My whole class is based on the transcode example of ffmpeg text The problem is when i run my program that encodes approx 90 streams it starts with 25% cpu usage 80% gpu encode usage %85 gpu decode usage with 100% sm utilization or it starts with 80% cpu (...) -- text
• 17:16
  Can't find error in function for changing sampling rate - kitty uwu Newest 'ffmpeg' Questions - Stack Overflow
  I have function for changing sampling rate of audio (only one channel): int change_sampling_rate(float *audio_input, int input_sample_rate, int output_sample_rate, int input_num_of_samples, float **audio_output, int *result_num_of_samples) AVChannelLayout src_ch_layout = AV_CHANNEL_LAYOUT_MONO; AVChannelLayout dst_ch_layout = AV_CHANNEL_LAYOUT_MONO; struct SwrContext *swr_ctx; swr_ctx = swr_alloc(); int ret; if (!swr_ctx) fprintf(stderr, "Could not allocate resampler context\\n"); ret = AVERROR(ENOMEM);  (...) -- https://jmp.sh/s/USFPaGnHXVuKFVYarYpm, https://jmp.sh/s/jbmWbPTwkdDujAocmi56
• 12:04
  How to get the video resolution from a File in Dart/Flutter? - Fractale Newest 'ffmpeg' Questions - Stack Overflow
  I was using video_player to do the rest of the metadata extraction I need but I didn't find a way to get the resolution with this package.
• 11:11
  How do I properly include libraries in meson? - inThe-FLesh Newest 'ffmpeg' Questions - Stack Overflow
  I am building a project that uses the ffmpeg libav libraries and I can't seem to get meson to compile with them. I have tried including just the headers but then definitions can't be found. I then compiled all of the source files I needed, and that didn't work either. I have compiled the whole thing into objects and plan to link them but I feel there should be an easier way.
• 08:34
  How to specify --extra-cflags and --extra-ldflags when cross compiling? - H. Yong Newest 'ffmpeg' Questions - Stack Overflow
  I am using the cross compiler aarch64-none-linux-gnu. Now I am trying to compile ffmpeg for aarch64 for a board with arm cpu. My question is when I run script like: export SYSROOT=/mnt/d/Libs/cross-compilers/arm-gnu-toolchain-13.2.Rel1-x86_64-aarch64-none-linux-gnu/aarch64-none-linux-gnu/libc ./configure --prefix=/usr/local \\ --enable-cross-compile \\ --cross-prefix=$CROSS_PREFIX \\ --sysroot=$SYSROOT \\ --arch=aarch64 \\ --target-os=linux \\ --host-os=linux \\ --enable-libvpx \\ --extra-cflags="-I/usr/local/include/vpx" \\  (...) -- aarch64-none-linux-gnu
• 09:13
  Why ffmpeg concat results wrong fps? How to avoid it? - Jinglong Newest 'ffmpeg' Questions - Stack Overflow
  I have several mp4 video files and want to concat there video streams into a new mp4 file. The command I used shows below: ffmpeg -f concat -safe 0 -i concat.txt -an -c:v copy -y out.mp4 The fps of result does not meet expectations. For example, there are two input wrote in concat.txt: file temp_result_0.mp4 file temp_result_1.mp4 file duration number of frames fps tbr temp_result_0.mp4 60.0 1200 20 20 temp_result_0.mp4 0.1 2 20 20 out.mp4 6
• 06:08
  Index error with moviepy when running on aws - Hardik Patel Newest 'ffmpeg' Questions - Stack Overflow
  I am getting this error: "MoviePy error: failed to read the duration of file %s.\\n" OSError: MoviePy error: failed to read the duration of file https://delivery.gettyimages.com/downloads/1490392845?k=20&e=AnE-X_nyTRBG5QvUm1OnnCZEOURkdWAdDeQJTmDW8Eo41FL7u_ROCopEha5N-Kwh-fxBr44QIe5s2vzAUchlcVs91TwSlJTMOKWYSTraamKCPRcJv19CqNZRB_FgLaW_. The funny thing is that for the same line of code: video_duration = VideoFileClip(getty_url).duration when running on my mac, it is running fine. However when running from an aws server I am getting this error: [2024-04-29 (...) -- https://delivery.gettyimages.com/downloads/1490392845?k=20&e=AnE-X_nyTRBG5QvUm1OnnCZEOURkdWAdDeQJTmDW8Eo41FL7u_ROCopEha5N-Kwh-fxBr44QIe5s2vzAUchlcVs91TwSlJTMOKWYSTraamKCPRcJv19CqNZRB_FgLaW_

28 avril

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

• 21:48
  How to yt-dlp extract youtube audio-only to 32-bit float 48000 .wav? [closed] - Rowe Morehouse Newest 'ffmpeg' Questions - Stack Overflow
  My use case: Extract just the audio from a youtube URL directly to a .wav at 32-bit float 48000. Preferably without any post process args or secondary passes or after-the-fact conversion or muxing. I want f32le, aka PCM_f32le, aka PCM 32-bit floating-point little-endian, which is supported by ffmpeg. Also want 48000 sample rate, as stated. Is this possible? My current command: yt-dlp -f bestaudio --extract-audio --audio-format wav --audio-quality 0 What do I need to add to achieve my use case / (...)
• 18:55
  adb screenrecord display only screenshot, it does not stream the screen [closed] - hexols Newest 'ffmpeg' Questions - Stack Overflow
  I have an Android TV, I want to stream its screen in my Ubuntu PC. I used this command: adb shell screenrecord --output-format=h264 - | ffplay - and after waiting for a while it displays the screenshot of the TV. But I want to display live stream of the Android TV. I also used the following command as well but got the same result: adb exec-out screenrecord --bit-rate=16m --output-format=h264 --size 800x600 - | ffplay -framerate 60 -framedrop -bufsize 16M - How can I achieve this using this command? Or is there a way to achieve it with another way by (...)
• 22:07
  Can't find error in function for changing sampling rate [closed] - kitty uwu Newest 'ffmpeg' Questions - Stack Overflow
  I have function for changing sampling rate of audio (only one channel): int change_sampling_rate(float *audio_input, int input_sample_rate, int output_sample_rate, int input_num_of_samples, float **audio_output, int *result_num_of_samples) AVChannelLayout src_ch_layout = AV_CHANNEL_LAYOUT_MONO; AVChannelLayout dst_ch_layout = AV_CHANNEL_LAYOUT_MONO; struct SwrContext *swr_ctx; swr_ctx = swr_alloc(); int ret; if (!swr_ctx) fprintf(stderr, "Could not allocate resampler context\\n"); ret = AVERROR(ENOMEM);  (...) -- https://jmp.sh/s/USFPaGnHXVuKFVYarYpm, https://jmp.sh/s/jbmWbPTwkdDujAocmi56
• 21:04
  Dynamic ffmpeg crop, scale & encoding code seems to break when the crop size changes - Blindy Newest 'ffmpeg' Questions - Stack Overflow
  The following code works perfectly as long as I only move the crop rectangle, however as soon as I change its size I no longer get frames out of my filter (av_buffersink_get_frame returns -11). It's crazy, even after the size changes, if it eventually changes to the original size that frame will go through, then it will go back to no longer providing frames. Would anyone happen to know what I'm doing wrong? My filter setup (note the crop & scale combination, it should (I think?) scale whatever I crop to the output video size): // buffer source -> buffer sink (...)
• 16:35
  How to Convert 16:9 Video to 9:16 Ratio While Ensuring Speaker Presence in Frame? - shreesha Newest 'ffmpeg' Questions - Stack Overflow
  I am tried so many time to figure out the problem in detecting the face and also it's not so smooth enough to like other tools out there. So basically I am using python and Yolo in this project but I want the person who is talking and who the ROI (region of interest) is. Here is the code: from ultralytics import YOLO from ultralytics.engine.results import Results from moviepy.editor import VideoFileClip, concatenate_videoclips from moviepy.video.fx.crop import crop # Load the YOLOv8 model model = YOLO("yolov8n.pt") # Load the input (...)
• 13:22
  Convert a sequence of exr files to mp4 using moviepy - 0xbadf00d Newest 'ffmpeg' Questions - Stack Overflow
  I have a sequence of exr files which I want to convert into a video using moviepy. When Since the colors in the exrs need be converted (otherwise the video appears almost black) I need to specify a color transfer characteristic. When I run ffmpeg directly using ffmpeg -y -apply_trc iec61966_2_1 -i input_%d.exr -vcodec mpeg4 output.mp4 everything is working perfectly fine. However, if I read the exrs using clip = ImageSequenceClip("folder_to_my_exrs/", fps = 24) and try to write the video using .write_videofile("output.mp4", codec = "mpeg4", ffmpeg_params = (...)
• 13:01
  Converting DAV to MP4 and OGG - mackowiakp Newest 'ffmpeg' Questions - Stack Overflow
  I want to prepare WEB page containing films from security camera recorders. Each recorder transmit video files in DAV format so each film is converted to MP4 format by script, using such syntax: ffmpeg -y -i movie.dav -vcodec libx264 -crf 24 movie.mp4 So I included in HTMLv5 code such entry: It works correctly with Chrome but not with Firefox. For proper work in FF it is necessary add link to OGG file. So correct HTMLv5 syntax for both browsers should look like this: Can anybody help (...)
• 10:43
  How to run ffmpeg with hardware encoding when using --filter_complex to hardcode subtitles? [closed] - user2006141 Newest 'ffmpeg' Questions - Stack Overflow
  I'm converting MKV files and hardcoding subtitles into MP4 format. I have over 100 files and want to speed the process up by enabling hardware encoding. I am able to hardware encode without hardcoding the subtitles via --filter_complex but as soon as I apply the filter it errors out. Here is my command line that works perfectly fine. ffmpeg -i input.mkv -filter_complex "[0:v:0]subtitles='input.mkv':si=0[v]" -map "[v]" -map 0:a:1 -c:a copy -map_chapters -1 "output.mp4" Here is my command line that works with hardware encoding without --filter_complex  (...)
• 04:26
  How to Play Multiple Streams with FFPLAY at the Same Time using RTSP Url - Bilal Ahmed Yaseen Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to play live stream coming from the server with RTSP URL. A sample RTSP URL is given below: rtsp://username:passwordⓐmachine_ip/42331536059e9f21 Actually, this stream is the call between two participants (caller & called). But when I play this URL with FFPLAY, I get just one stream(called) while I should get both streams (caller and called). I am using the following command: ffplay rtsp://username:passwordⓐmachine_ip/42331536059e9f21 Am I missing some parameters along with this command to fetch all (...)
• 00:22
  Python pydub issue: Can't repoen a wav file after it as been reencoded by ffpeg [Silved] - Trent Tompkins Newest 'ffmpeg' Questions - Stack Overflow
  Solved by Michael Butscher. Updated code is now in the repo in the fixed branch. Thanks! I have a python script that reads in all the *.wav files in a directory and saves them in a folder called output after it adjusts their volume. lower.py: import os from pydub import AudioSegment as ass # get the current working directory current_working_directory = os.getcwd() all_files = os.listdir(); while len(all_files) > 0: file = all_files.pop() song = ass.from_wav(file) song = song - 16  (...) -- https://github.com/tibberous/ChangeWavVolume/tree/fixed

27 avril

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

• 17:59
  ffplay cannot play video after being encoded and decoded with vvenc and vvdec [closed] - TompyCZ Newest 'ffmpeg' Questions - Stack Overflow
  After encoding a video sequence named crowd run, from https://media.xiph.org/video/derf/, the 2160p version with ffmpeg integrated with vvenc and vvdec according to this tutorial https://github.com/fraunhoferhhi/vvenc/wiki/FFmpeg-Integration, and then decoding it back, when I want to compare it with vmaf, or play it with ffplay, i get the following error Format yuv4mpegpipe detected only with low score of 1, misdetection possible! [yuv4mpegpipe ⓐ 000001ce93ee4ec0] Header too large. (file path replaced with this text): Invalid argument I encoded it using this (...) -- https://media.xiph.org/video/derf/, https://github.com/fraunhoferhhi/vvenc/wiki/FFmpeg-Integration
• 16:03
  Convert SDR-JPEG to HDR-AVIF [closed] - Jonas Janzen Newest 'ffmpeg' Questions - Stack Overflow
  I would like to convert a jpg file into an avif file that is to be saved in HDR10-capable metadata (PQ curve, 2020 color space, 10 bit). The idea is to save normal SDR images in HDR-capable containers so that they can be displayed in all their glory on HDR-capable displays. I want to play with inverse tone mapping, to manipulate the output, so I implemented in Python via subprocess. So far I just want the input image to be saved in AVIF as HDR and look the same at the end as before, so that I can then make changes in the next step. I used the following command for (...) -- enter image description here, enter image description here
• 18:44
  Using ffmpeg to resync an encoded video [closed] - Marc Mouton Newest 'ffmpeg' Questions - Stack Overflow
  I am encoding a few videos with av1an and svt-av1-psy. I have one file with audio that goes out of sync. I usually encode the audio in opus, but even remuxing the original stream result in out of sync. It seems the new av1 video is shorter of 831ms compare to original. Using mkvtoolnix to set -831ms and use the "correct video timing..." option result in a file that is not far of being well sync, but no quiet perfect and the total lenght of the video is even shorter. So is there any way to use the original h264 video file as a reference for the new AV1 (...)
• 05:05
  How to use CUDA to decode video in FFmpeg.AutoGen? - JongSeong Kim Newest 'ffmpeg' Questions - Stack Overflow
  FFmpeg.AutoGen version: 7.0 Following is similar with Program.cs in "FFmpeg.AutoGen.Example" directory. var sourceSize = vsd.FrameSize; var sourcePixelFormat = AVPixelFormat.AV_PIX_FMT_CUDA; var destinationSize = sourceSize; var destinationPixelFormat = AVPixelFormat.AV_PIX_FMT_BGRA; VideoFrameConverter vfc = new VideoFrameConverter(sourceSize, sourcePixelFormat, destinationSize, destinationPixelFormat); However, when 'ffmpeg.sws_getContext' is called, ffmpeg shows below error message. ffmpeg error message: [swscaler ⓐ 000001b7af30aa00] (...)
• 00:47
  Sample rate conversion doesn't work (SWR) - kitty uwu Newest 'ffmpeg' Questions - Stack Overflow
  I need to write function in C that changes sample rate of one audio channel (float linear array). I have this now: int resample_audio(float *audio_input, int input_sample_rate, int output_sample_rate, int input_num_of_samples, float *audio_output, int *result_num_of_samples) SwrContext* swr_ctx = swr_alloc(); if (!swr_ctx) fprintf(stderr, "Could not allocate SwrContext\\n"); return -1; av_opt_set_int(swr_ctx, "in_channel_layout", AV_CH_LAYOUT_MONO, 0); av_opt_set_int(swr_ctx, "out_channel_layout", AV_CH_LAYOUT_MONO, 0);  (...)

26 avril

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

• 18:30
  FFmpeg RTSP Recording: Video Timestamp Does not Match With Recorded MP4 File Timestamp [closed] - lastpeony4 Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently testing by streaming a 30 fps example flv video using a local Happy-Time RTSP server. This is the flv file i am streaming with RTSP: I recorded the video with below ffmpeg command: ffmpeg -i rtsp://127.0.0.1:6555/test30fps.flv -c copy test30fps.mp4 The resulting video appears visually satisfactory, yet there's a discrepancy between the displayed time on the video and the actual duration of the video file. Although the MP4 file duration is correct (endRecordingTimeMs-startRecordingTimeMs= mp4 file duration), the time displayed within (...) -- ,
• 14:11
  Multithreading decoding A/V streams via FFmpeg + JNI + Android NDK causes artifacts - tretdm Newest 'ffmpeg' Questions - Stack Overflow
  It would seem that if I mute the callback for reading the audio buffer, then they disappear. FFmpeg decoding issues in picture I'll attach the code below to make it easier for you to understand what the problem is: ffwrap.cpp static void *audioDecoderThread(void *arg) AudioDecoder *audioDec = (AudioDecoder*) arg; audioDec->prepare(); audioDec->start(); static void *videoDecoderThread(void *arg) VideoDecoder *videoDec = (VideoDecoder*) arg; videoDec->prepare(); videoDec->start(); // ... void (...) -- FFmpeg decoding issues in picture
• 09:01
  How to Terminate a Process Normally Created using ProcessBuilder - Bilal Ahmed Yaseen Newest 'ffmpeg' Questions - Stack Overflow
  I am creating Processes using ProcessBuilder in my Java Application. The created process executes some FFMPEG commands which actually copy the RTSP streams in specified destination media file. ProcessBuilder builder = new ProcessBuilder("ffmpeg", "-i", RTSP_URL, "-f", fileFormat, destFilePath); Process processToExecute = builder.start(); I want to close the process before it completes its execution. So, If I run this FFMPEG command directly in windows CMD and then press 'CTRL+C' after 5 seconds then process get terminates with status '2'. And I (...)