7 mai

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

• 07:30
  Run "scrcpy" Commands And Throws Error "libopenh264.so.7 is missing" / "openh264 disabled" - 息子運命 Newest 'ffmpeg' Questions - Stack Overflow
  I try to run scrcpy command like what I did before, and proved if it's worked not just once. scrcpy -m 540 -S but after re-installing my OS and use Fedora OS with dnf package manager, I got errors with output below. WARN: Demuxer 'audio': stream explicitly disabled by the device WARN: [FFmpeg] libopenh264.so.7: cannot open shared object file: No such file or directory: libopenh264.so.7 is missing, openh264 support will be disabled ERROR: Demuxer 'video': could not open codec ERROR: Demuxer error [server] INFO: Device screen turned (...)
• 04:49
  FFMpeg avformat_write_header always returns < 0 - gabe.roze Newest 'ffmpeg' Questions - Stack Overflow
  We've asked a freelancer to build a video encoder with FFMPeg for iOS but there is a bug and the freelancer is no longer available. I very inexperienced in FFMpeg and video encoding and am trying to debug this error. From what I understand, we're attempting to create an output file and create a header for it however, avformat_write_header is always less than zero. If I comment it out, it does not work - (BOOL) writeHeaderWithError:(NSError *__autoreleasing *)error AVDictionary *options = NULL; // Write header for output file int (...)
• 01:59
  FFMPeg is not generating output video file - Rayam Tanta Newest 'ffmpeg' Questions - Stack Overflow
  Could you please help me on the below? Whats wrong in the below command, am not seeing output file ffmpeg -y -framerate 30 -start_number 1 -loop 1 -i "C:\\Intel\\images%d.jpg" -i "C:\\Intel\\audio\\synthesized_audio.wav" -analyzeduration 2500000 -probesize 5000000 -c:v libx264 -pix_fmt yuv420p -c:a aac -strict experimental -shortest -muxers -f mpg "C:\\Intel\\output.mpg" string imagesDirectory = ⓐ"C:\\Intel\\images"; string audioFile = ⓐ"C:\\Intel\\audio\\synthesized_audio.wav"; string outputVideo = ⓐ"C:\\Intel\\output.mpg"; string ffmpegCommand = $"ffmpeg -y (...)

6 mai

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

• 17:37
  FFMPEG transcoding as 59.979960 fps instead of 60 fps [closed] - RJQ Newest 'ffmpeg' Questions - Stack Overflow
  I am transcoding an image sequence to a 10 frame 60fps .mov files using the first command below. I am then concatenating the exported videos using the second command below. Transcode ffmpeg -y -r 60 -probesize 13M -start_number 1001 -i 'input_video.%04d.jpeg' -c:v libx265 -pix_fmt yuv420p10le -crf 28 -preset slower -tag:v hvc1 -vf lut3d='output_lut.cube' -r 60 -frames:v 10 -movflags faststart output_video_0001.mov Concatenate ffmpeg -y -f concat -safe 0 -i input_concat_list.txt -c copy output_concat.mov I expected the final file from the (...)
• 18:57
  How do I make libavformat reconnect when connection is reset by peer? - user24897675 Newest 'ffmpeg' Questions - Stack Overflow
  I am opening a network file via HTTPS like this: avformat_open_input(&m_format, "https://www.example.com/file.mp4", nullptr, nullptr); It works, however sometimes connection is closed and this is logged: [tls ⓐ 0x7f600ba690] Error in the pull function. [tls ⓐ 0x7f600ba690] IO error: Connection reset by peer [mov,mp4,m4a,3gp,3g2,mj2 ⓐ 0x7f6007e450] Packet corrupt (stream = 0, dts = 24188928). [aac ⓐ 0x7f60324800] Input buffer exhausted before END element found I found it possible to setup reconnection by logs from this post. Here are their (...)
• 18:18
  Multiple fadeIn/fadeOut effects in one audio file with ffmpeg - farw Newest 'ffmpeg' Questions - Stack Overflow
  I have some problem to add several fade effects to one audio file. When I try to use a command like this: ffmpeg -y -i /home/user/video/test/sound.mp3 -af "afade=t=in:ss=0:d=3,afade=t=out:st=7:d=3,afade=t=in:st=10:d=3,afade=t=out:st=17:d=3,afade=t=in:st=20:d=3,afade=t=out:st=27:d=3" /tmp/test.mp3 then my output audio file has a fadein and fadeout applied only once. All the next effects don't get applied. Is there any possible way to apply several fade effects to the same audio file? Also, what is the difference between ss and st parameter in this (...)
• 17:44
  How to set "ch_layout" in ffmpeg 6.1? - Steven porite Newest 'ffmpeg' Questions - Stack Overflow
  In 6.1 Ffmpeg, it use "ch_layout" to replace the "channel_layout" and "number". The "ch_layout" is "AVChannelLayout *" type. This type is defined in channel_layout.h, some kind of "ch_layout" is defined in this file too. If I want to use the "av_dict_set_int()" set the "ch_layout" to "AV_CHANNEL_LAYOUT_STEREO", what should I fill to the "value"? /** * Macro to define native channel layouts * * ⓐnote This doesn't use designated initializers for compatibility with C++ 17 and older. */ #define AV_CHANNEL_LAYOUT_MASK(nb, m) \\ /* .order */ (...)
• 11:21
  The maximum recursion level for setlocal has been reached [closed] - pengfei liu Newest 'ffmpeg' Questions - Stack Overflow
  ⓐecho off setlocal enabledelayedexpansion rem 设置源视频文件夹路径和目标视频文件夹路径 set source_folder=F:\\BaiduNetdiskDownload\\dhm\\uploaded set target_folder=C:\\Users\\SF-ZJ-442\\Desktop\\target_folder rem 确保目标文件夹存在，如果不存在则创建 if not exist "%target_folder%" mkdir "%target_folder%" rem 设置目标分辨率（例如：1280x720） set target_resolution=1080:1920 echo start....... echo "%source_folder%\\*.mp4" rem 遍历源文件夹中的所有视频文件 for %%i in ("%source_folder%\\*.mp4") do ( rem 提取文件名和扩展名 set "filename=%%~ni" set "extension=%%~xi" rem 构建目标文件路径 set (...)
• 13:13
  is it possible to read mp3 id3 tags in php using ffmpeg? if so then how? [closed] - Assassiŋ Shaɖow Newest 'ffmpeg' Questions - Stack Overflow
  Hi i have a few mp3 files in my server which constantly change and i need the mp3 id3 tags for people to know what song is being played at the moment preferably via php . I am a complete noob at this so any help is helpful.
• 14:05
  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 (...)
• 02:02
  How to customize the spectrograms generated with ffmpeg or SoX? [closed] - Mark I Newest 'ffmpeg' Questions - Stack Overflow
  I found code to batch generate spectrograms of music files I have with SoX and ffmpeg, and while they work I'd like to customize the spectrograms they generate to make them look "nicer", more like Spek's. Specifically, I want to change the x axis' time format from s to mm:ss, the font, the frequency format, and add some info about the file above the spectrogram. I can't find anything in their documentation, so what parameters would I have to add to the sox or ffmpeg commands to make their output look more like (...) -- like this?
• 08:35
  Convert png images to HEVC with alpha video via ffmpeg [closed] - foxhable Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a video from a sequence of png images in the HEVC with alpha codec via ffmpeg. After the command ffmpeg -i a%d.png -r 30 -c:v hevc_videotoolbox -allow_sw 1 -alpha_quality 1 -vtag hvc1 ffmpeg-hevc.mov I get a video with a transparent background that opens in QuickTime, but not Safari. Info about this video via ffprobe: ffprobe .\\ffmpeg-hevc.mov Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\\ffmpeg-hevc.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf61.3.103  (...) -- video
• 07:39
  How to clone last frame when using overlay in ffmpeg? - mikezang Newest 'ffmpeg' Questions - Stack Overflow
  I use this code to slide previous and next pages up, this is no problems, can I remove png file 1970～1979-last.png and use the last frame of video file 1970～1979.mp4 to instead it? script-01.txt color=white:864x504[c]; [0:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s0]; [1:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s1]; [c][s0]overlay=y=0-h*t[c]; [c][s1]overlay=y='if(between(t,0,18),max(H-h*t,0),max(0-h*(t-18),0-H))'[v], [v]tpad=stop_mode=clone:stop_duration=10[s2]; [s2]drawtext=fo
• 06:28
  How to use pyav or opencv to decode a live stream of raw H.264 data? - Dery Newest 'ffmpeg' Questions - Stack Overflow
  The data was received by socket ,with no more shell , they are pure I P B frames begin with NAL Header(something like 00 00 00 01). I am now using pyav to decode the frames ,but i can only decode the data after the second pps info(in key frame) was received(so the chunk of data I send to my decode thread can begin with pps and sps ), otherwise the decode() or demux() will return error "non-existing PPS 0 referenced decode_slice_header error" . I want to feed data to a sustaining decoder which can remember the previous P frame , so after feeding one B frame, the decoder return a (...)
• 00:16
  FFmpeg does not detect bitstream filter parameter - FFmpegEnthusiast Newest 'ffmpeg' Questions - Stack Overflow
  I have tried to make a bitstream filter for FFmpeg that drops the nth keyframe for positive numbers and allows the first n keyframes and drops the rest for nonpositive numbers, called "datamosh": ffmpeg -i input.webm -bsf:v datamosh=target=20 -c copy output.webm outputs the error: Option 'target' not found [vost#0:0/copy ⓐ 0x54edc40] Error parsing bitstream filter sequence 'datamosh=target=20': Option not found Here is the code for the "datamosh" bitstream filter: #include "bsf.h" #include "bsf_internal.h" #include (...)

5 mai

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

• 22:43
  Adding a rotating effect on an image using ffmpeg? [closed] - Garry Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to overlay an image on a video, and add subtle rotating effects for that image, left, right, left right, and so on. (see pictures) The rotation works, however the edges are always very jagged and bad quality. Is there a way to improve my filters, or is there a better approach that I can use, without jagged edges? This works, overlays the image.png and applies to rotating effect: ffmpeg -loop 1 -i image.png -i video.mp4 -t 10 -filter_complex (...) -- , ,
• 15:42
  Can I only use video file to countdown at last frame? [closed] - mikezang Newest 'ffmpeg' Questions - Stack Overflow
  I save the last frame to image when I create a video, then I convert image to 10 seconds video and put countdown on it, at last, merge this two videos. I can also use video to countdown but that start from first frame, how can I countdown at last frame? countdown.bat ffmpeg -hide_banner ^ -i "C:\\myvideos\\video.mp4" ^ -filter_complex_script countdown.txt ^ -t 30 -y %2.mp4 countdown.txt [0:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s0]; [s0]drawtext=fontfile='/WINDOWS/Fonts/Arial.ttf':text='%eif\\:10-t\\:
• 14:13
  The question about ffmpeg drawtext filter [closed] - B1GGersnow Newest 'ffmpeg' Questions - Stack Overflow
  I tried to use rockchip(aarch64) hardware acceleration and add a drawtext filter to add watermarks. However, squares appear when multiple Chinese fonts are added. This is my compilation parameter. ./configure --prefix=/usr --enable-gpl --enable-version3 --enable-libdrm --enable-rkmpp --enable-rkrga --enable-filter=drawtext --enable-libharfbuzz --enable-libfreetype --enable-libfontconfig --enable-libfreetype --enable-libfribidi ffmpeg -hwaccel rkmpp -hwaccel_output_format drm_prime -i 1.mp4 -vf (...) -- img1, img2
• 16:30
  FFMPEG Command to convert images to svg [closed] - themujahidkhan Newest 'ffmpeg' Questions - Stack Overflow
  Users are trying to convert images to SVG image on my website, Below I've given a link to the site, more detail on error and code that handles the conversion of media files. You can check out the live site Here. Steps to reproduce the error. Upload the png file, Select SVG as output file Click convert. It is throwing error. Below is the code for that converts users input and gives input based on user preference. // imports import createCanvas, loadImage from "canvas"; import Action from "ⓐ/types"; import FFmpeg (...)
• 20:24
  convert video to audio using ffmpeg - shakti goyal Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert a video to mp3 using ffmpeg library but ffmpeg command is not working, it is returning the code 1 Video conversion to MP3 failed with return code: 1 try final session = await FFmpegKit.execute('-i $videoFilePath -vn -ar 44100 -ac 2 -b:a 192k -f mp3 $audioFilePath'); final returnCode = await session.getReturnCode(); if (ReturnCode.isSuccess(returnCode)) print('Video conversion to MP3 successful!'); else print('Video conversion to MP3 failed with return code: $returnCode');  (...)
• 18:59
  Can you change decoded format with ffmpeg? [closed] - Gunter Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to play some videos from my external hard drive onto my TV. However, it seems Planar 4:2:0 YUV 10 bit LE is too demanding for my TV. The video codec for my videos are h264. I have some other videos that are h264 and are able to run on my TV. When I open them on VLC, their decoded format is blank. The problem just occurs when the decoded format is YUV 10-bit. I'm not too familiar with ffmpeg and I'm not sure what commands I need or if it's possible to change the decoded (...)
• 18:13
  How to change pitch and tempo together, reliably with ffmpeg - Ray C Newest 'ffmpeg' Questions - Stack Overflow
  I know how to change tempo with atempo, but the audio file becomes distorted a bit, and I can't find a reliable way to change pitch. (say, increase tempo and pitch together 140%) Sox has a speed option, but truncates the volume AND isn't as widely available as ffmpeg. mplayer has a speed option which works perfectly, but I can't output without additional libraries. I seem to understand ffmpeg doesn't have a way to change pitch (maybe it does recently?) but is there a way to change frequency or some other flags to emulate changing pitch? Looked quite (...)
• 18:08
  Is there a way to horizontal flip video captured from flutter front camera - JoyJoy Newest 'ffmpeg' Questions - Stack Overflow
  Basically, I'm trying to flip video horizontally after capturing it from flutter front camera. So I start recording, stop recording, flip the video and pass it to another page. I'm fairly new and would appreciate any assistance as my code isn't working I've tried doing so using the new ffmpeg_kit flutter Future flipVideo(String inputPath, String outputPath) async final ffmpegCommand = "-i $inputPath -vf hflip $outputPath"; final session = FFmpegKit.executeAsync(ffmpegCommand); await session.then((session) async final returnCode = await (...) -- ffmpeg_kit
• 16:45
  How to perform Video Trimming & Merging Performance in Mobile App? [closed] - Harpreet Singh.8052 Newest 'ffmpeg' Questions - Stack Overflow
  I am in the process of developing an app that will allow users to trim and merge recorded videos similar to Snapchat and Instagram stories. Currently, I am using FFmpeg for video processing, but it is taking too long to complete. I have come up with an idea to use ExoPlayer to minimize processing time. My plan is to store the trimmed duration of multiple videos and only play the trimmed part when the video is played. ExoPlayer allows playing multiple videos seamlessly, so it will appear as if the videos have been trimmed and merged. However, I am uncertain about how to handle video (...)
• 15:13
  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
• 06:56
  How to improve Video Trimming & Merging Performance for Mobile App [closed] - Harpreet Singh.8052 Newest 'ffmpeg' Questions - Stack Overflow
  I am in the process of developing an app that will allow users to trim and merge recorded videos similar to Snapchat and Instagram stories. Currently, I am using FFmpeg for video processing, but it is taking too long to complete. I have come up with an idea to use ExoPlayer to minimize processing time. My plan is to store the trimmed duration of multiple videos and only play the trimmed part when the video is played. ExoPlayer allows playing multiple videos seamlessly, so it will appear as if the videos have been trimmed and merged. However, I am uncertain about how to handle video (...)
• 09:12
  Running ffmpeg in Docker environment on AWS EC2 [duplicate] - must Newest 'ffmpeg' Questions - Stack Overflow
  I want to use FFMPEG inside my Java application. I want to instal ffmpeg in environment where this app is running. My current Dockerfile: # Stage 1: Build the application FROM maven:3.8.4-openjdk-17 AS build WORKDIR /app COPY pom.xml . COPY src ./src RUN mvn clean install -Dmaven.test.skip=true # Stage 2: Run the application FROM openjdk:17 WORKDIR /app COPY --from=build /app/target/application.jar ./app.jar EXPOSE 8080 CMD ["java", "-jar", "-Dspring.profiles.active=pr", "app.jar"] I simply built a docker image by (...) -- https://hub.docker.com/r/jrottenberg/ffmpeg
• 05:16
  How can I found FFmpeg Error code's meaning? - Birds Newest 'ffmpeg' Questions - Stack Overflow
  I have an issue using FFMPEG. avcodec_send_packet() is returning error code -12. I am trying to find what the meaning of -12 is. I found this page but I can't understand the calculation for -12: How can I find out what this ffmpeg error code means? Can anyone help me? I'm using DXVA2 for decoding. and avcodec_send_packet() function is return -12 after the 20th frame. 20th frame return 21st frame return  (...) -- ,
• 03:50
  PyQt QGraphicsScene Render Scene As Video Format - Alex Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to allow the user to export the scene as an mp4 (video format), the items of the scene consists of QGraphicsVideoItem and multiple QGraphicsTextItem, I need to export the scene as it will allow the user to save the video with the text items. I've found one of the ways to do this but the issue is that it will take hours for a simple 5 seconds videos as it saves every image to a byte to create a video, every image is a millisecond. If I change from millisecond to seconds it could speed up but the video will not look as smooth, is there a more efficient way of doing (...)
• 00:43
  How to horizontal flip video captured from flutter front camera - JoyJoy Newest 'ffmpeg' Questions - Stack Overflow
  Basically, I'm trying to flip video horizontally after capturing it from flutter front camera. So I start recording, stop recording, flip the video and pass it to another page. I'm fairly new and would appreciate any assistance as my code isn't working I've tried doing so using the new ffmpeg_kit flutter -- ffmpeg_kit

4 mai

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

• 23:52
  how to set subtitles quality in ffmpeg - Exorcismus Newest 'ffmpeg' Questions - Stack Overflow
  am trying to burn captions on a video using ffmpeg, for some videos the subtitles quality looks bad similar to the image below... currently the configurations am using are ... .withVideoCodec("libx264") .withAudioCodec("copy") .withOutputFormat("mp4") .outputOptions("-preset veryfast") .outputOptions('-max_muxing_queue_size 1024') how can I differentiate captions quality from video quality ? --
• 13:49
  python 3 using ffmpeg in a subprocess getting stderr decoding error - jdauthre Newest 'ffmpeg' Questions - Stack Overflow
  I am running ffmpeg as a subprocess and using the stderr to get various bits of data like the subtitles stream Id's. It works fine for most videos, but one with japanese subtitles results in an error: 'charmap' codec can't decode byte in position xxx : character maps to Much googling suggests the problem is that the japanese requires unicode, whereas English does not. Solutions offered refer to problems with files, and I cannot find a way of doing the same with the stderr. Relevent Code is below: command = (...)
• 13:31
  Audio file could not be read as PCM WAV, AIFF/AIFF-C, or Native FLAC; check if file is corrupted or in another format - 陳昱廷 Newest 'ffmpeg' Questions - Stack Overflow
  import os import speech_recognition as sr command = "ffmpeg -i videototext.mp4 videototext.mp3" os.system(command) commandwav = "ffmpeg -i videototext.mp3 videototext.wav" os.system(commandwav) AUDIO_FILE = "videototext.wav" r = sr.Recognizer() videototext = sr.AudioFile(AUDIO_FILE) with videototext as source: audio = r.record(source, duration=100) print(type(audio)) print(r.recognize_google(audio)) above is my code,then the error is: Audio file could not be read as PCM WAV, AIFF/AIFF-C, or (...)
• 06:29
  Batch generating spectrograms with ffmpeg or SoX: how to customize their appearance, and is my code so far correct? - Mark I Newest 'ffmpeg' Questions - Stack Overflow
  I have a .flac music library, and for organizational and quality assessment reasons I want to have spectrograms of every song in it. After finding out that the program I usually use to view them, Spek, doesn't offer a batch export option, I have found ways to batch generate spectrograms with both SoX and fmpeg. Below you can find the two scripts I've got, which take as an input a folder which contains flac files or subfolders containing flac files, and output their spectrograms (with the same names as their corresponding flacs) to an output folder with the same structure as the (...) -- this is what the output looks like:, this is what it outputs: , Spek outputs
• 05:55
  Ffplay dual monitor setup - Alexandr Zarubkin Newest 'ffmpeg' Questions - Stack Overflow
  How can I launch ffplay on the second monitor in full screen mode? I need to play a video file while analyzing video player output to get current position in the file being played.
• 02:11
  How to split one overlay script to multiple part scripts? - mikezang Newest 'ffmpeg' Questions - Stack Overflow
  I can slide 30 images from left to center and countdown 10 seconds, then keep slide to left..., but run this script more than hours... script.txt [0:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s0]; [1:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s1]; ... [29:v]scale=864:504:force_original_aspect_ratio=decrease,pad=864:504:-1:-1,setsar=1[s29]; [s0]split=2[bg][v]; [bg]drawbox=c=white:t=fill[bg]; [bg][v]overlay=x='if(between(t,0,10),max(W-w*(t-0),0),max(0-w*(t-10),0-W))', dra -- , ,

3 mai

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

• 09:43
  Muxing together a .ts file and a sub file causes playback issues in video and audio [closed] - Meta83 Newest 'ffmpeg' Questions - Stack Overflow
  So I have a .ts file and a converted .dvb sub file (.SRT TO .DVB) that I want to mux togheter using FFMPEG. The mux is a success and the file plays fine in VLC or other modern divce.However I have an older divce (around 10 yeras old) where playback has issues, whenever a line of subs is displayd the picture and and audio gets corrupted and frezzes up and as sson there are no lins everything looks good again and so on. Note that subs are displayd correctly and they are not affected by the issue, only picture and audio is. I have tried using diffrent command without any luck but here (...)
• 09:04
  HEVC with alpha [closed] - foxhable Newest 'ffmpeg' Questions - Stack Overflow
  I trying create HEVC with alpha video from png images through ffmpeg. When i try, it outputs a video that works, has a transparent background and opens in QuickTime, but does not open in Safari. Then i try creating in prores 4444 codec and convert from macOS Context Menu -> Encode Selected Video Files with HEVC 1080p and Preserve Transparency. It has work - video with transparent background, open in QuickTime and in Safari. So i tried understand what a difference in meta data and only what i find its working video has HVEC encoder, but not working has Lavc61.5.103 (...) -- example of working video
• 22:51
  Xvfb records a black screen - Vivek Newest 'ffmpeg' Questions - Stack Overflow
  I am trying a record a video by running xvfb inside a docker image. No matter what I do it gives me black screen. Screen size same in xvfb and ffmpeg and puppeteer. It will would really great if someone can help. start-xvfb.sh --------------------------------------------------------------------- # Start Xvfb Xvfb :99 -screen 0 1280x720x24 & # Set the display environment variable export DISPLAY=:99 # Run the application (assuming it starts with npm start) npm run dev Dockerfile FROM node:lts-alpine3.19 # (...) --
• 15:07
  encoding XDCAM MXF with FFMPEG [closed] - Mark Yang Newest 'ffmpeg' Questions - Stack Overflow
  Trying to encode XDCAM HD422 MXF with FFMPEG But can't know specific setting for encoder/format/mux Anyone can show me sample code or give some advice for that ?
• 07:45
  Specify percentage instead of time to ffmpeg - user779159 Newest 'ffmpeg' Questions - Stack Overflow
  To get a thumbnail from an image halfway through the video I can do ffmpeg -ss 100 -i /tmp/video.mp4 -frames:v 1 -s 200x100 image.jpg. By using -ss 100 it gets a thumbnail at 100 seconds (which would be halfway through the video assuming the video is 200 seconds long). But if I don't know the exact length of the video, in my application code I would need to use something like ffprobe to first determine the length of the video, and then divide it by 2 to get the thumbnail time. Is there a way to get ffmpeg to get the thumbnail at the percentage of the video you (...)

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 (...)

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", (...)
• 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 (...)