30 mai

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

• 05:18
  Duplicate class I'm already using ffmpeg_kit_flutter_audio in my code: 5.1.0-LTS for audio conversion video_editor: ^2.1.0 - Rafael Dos Santos Coladelo Newest 'ffmpeg' Questions - Stack Overflow
  I'm already using in my code: ffmpeg_kit_flutter_audio-5.1.0-LTS for audio conversion, when you put the video_editor: ^2.1.0 general the error, is there any way to solve it? FAILURE: Build failed with an exception. What went wrong: Execution failed for task ':app:checkDebugDuplicateClasses'. A failure occurred while executing com.android.build.gradle.internal.tasks.CheckDuplicatesRunnable Duplicate class com.arthenica.ffmpegkit.Abi found in modules jetified-ffmpeg-kit-audio-5.1.LTS-runtime (...) -- https://help.gradle.org
• 04:03
  Is it possible to pregenerate m3u8 file? (the playlist only) and skip the transcoding? - Jonathan Lightbringer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a media server, and only want to transcode video when it's played. However I need the playlist in advance so that the client play can load the video metadata. Is this possible? I want to do something like this: Client -> GET m3u8 (pregenerated in advance) Client -> GET ts -> Transcode only this single ts file Client -> GET ts -> Transcode only this single ts file Client -> GET ts -> Transcode only this single ts file I don't want to transcode the entire video at once, I want to be able to only transcode the part that is (...)

29 mai

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

• 21:53
  Moviepy not updating FFmpeg Version after FFmpeg Install? - The_ Game12 Newest 'ffmpeg' Questions - Stack Overflow
  I've been toying around with MoviePy, and recently switched a project to a new computer at home to continue messing around with it. However, I tried running what I had previously written (which ran perfectly fine on the other computer) and I get this: OSError: MoviePy error: failed to read the first frame of video file ./Gameplay/minecraft- gameplay2.mp4. That might mean that the file is corrupted. That may also mean that you are using a deprecated version of FFMPEG. On Ubuntu/Debian for instance the version in the repos is deprecated. Please update to a recent (...)
• 16:10
  Rounded corners in subtitle (Advanced Substation Alpha [.ass]) - Leander Mihm Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to have rounded corners with the BorderStyle 4 in .ass (Advanced Substation Alpha)? I only found out that the BorderStyle 4 exists, because I was looking at this stackoverflow. Is there any good and complete documentation of the Advanced Substation Alpha format? I'm currently using the following configuration: BorderStyle=4 Outline=10 --
• 13:26
  How to correctly apply select filter after trim in ffpeg? [closed] - lakhan dhingra Newest 'ffmpeg' Questions - Stack Overflow
  I am using the following ffmpeg command to trim and select certain portions of the video. ffmpeg -v verbose -i test.mp4 -filter_complex \\ "[0:v]trim=start=5:end=40,setpts=PTS-STARTPTS[v_trimmed]; \\ [v_trimmed]select='between(t,10,20)',setpts=N/FRAME_RATE/TB[v]; \\ [0:a]atrim=start=5:end=40,asetpts=PTS-STARTPTS[a_trimmed]; \\ [a_trimmed]aselect='between(t,10,20)',asetpts=N/SR/TB[a]" \\ -map "[v]" -map "[a]" -y -r 30 output_video.mp4 The above command errors out with the following trace [h264 ⓐ 0x12570a0e0] Reinit context to (...)
• 07:52
  avformat_open_input not read only? is a bug? [closed] - qyt Newest 'ffmpeg' Questions - Stack Overflow
  I'm recording my screen on Windows using the command: ./ffmpeg -f gdigrab -framerate 30 -i desktop -c:v libx264 -crf 20 -preset ultrafast -max_muxing_queue_size 1024 -hls_time 5 -hls_list_size 10 -hls_flags delete_segments -hls_segment_filename "d:\\\\1\\\\file%03d.ts" "d:\\\\1\\\\playlist.m3u8" Then I use the function avformat_open_input to open this m3u8 file, but after calling this function, the m3u8 file stops updating. When I use the command ./ffmpeg -i D:\\1\\video.m3u8 -c copy -f mpegts "srt://xxxxx?streamid=#!::h=live/qyt,m=publish", the test results are the same. However, when I (...)
• 13:26
  How to create a video of a precise duration from a single image or by trimming a video using FFmpeg? [closed] - aas Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a video from a single image with a very specific duration of 0.09375 seconds using FFmpeg. I've tried various commands, but I can't seem to get the exact duration I need. The closest I've gotten is 0.080000 seconds. It doesn't always have to be something like 0.09375, but I wanted to have an example for it. I've also tried trimming a video, but from what I've read so far, the encoding of the video can be a problem. Even after trying different FFmpeg commands or using MoviePy directly, I've never arrived at the desired (...)
• 15:10
  In Advanced SubStation Alpha (Ass file) how can I animate each word as it is spoken? - Nick Powers Newest 'ffmpeg' Questions - Stack Overflow
  Hello I am trying to get Ass (Advanced SubStation Alpha) code to animate (highlight in green) each word as it is spoken and then have it revert back to white afterwards. What happens with my code is very odd. At first I cannot even see any text. It then appears with multiple lines overlapped, partially hanging off the screen. From this point it "kind of" works. I can see the desired highlighting happening but because the text is all jumbled and overlapping it can hardly be called a success. In case it is relevant I am using ffmeg to burn in the subtitles. I am using the following (...)
• 14:11
  Coordinates with file format .ASS - Alex Newest 'ffmpeg' Questions - Stack Overflow
  I'm grabbing my text coordinates that I want to use for the file format .ASS and for centering on a 1080 by 1920 video, I have an application that displays where the text is on the video and can retrieve the position, an example of centered position is 310 by 800. When I try to set the position of the text inside the .ASS with those positions it doesn't write the caption where is meant to be. Could some explain how a .ASS positioning works. If use 200 px by 200 px as positioning it places it way further than the center even though the video its a 1080x1920 video, shouldn't (...) -- ,
• 13:47
  Get access to SDL texture pixels - chugadie Newest 'ffmpeg' Questions - Stack Overflow
  Is there anyway (besides the documented slow method) to get access to the texture pixels from an SDL2 texture? SDL_RenderReadPixels says Warning: this is a very slow method and should not be used frequently. I want to point an ffmpeg AVFrame->data over to the texture pixels and have it encode what's in the texture. Basically, screen grab a texture after rendering and blending several textures together. SDL_LockTexture() gives write-only access to the pixels. The docs also say not to expect pixel data to be present in the pointer returned to you. Is it possible with (...)
• 07:46
  easy normalization with FFmpeg - joberry Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to write software to edit audio files. One aspect of this software is a normalization function. Until now, I have been normalizing audio with Audacity. Now, I want to normalize them using FFmpeg from a C# application. I looked into the documentation of FFmpeg and saw that there are different types of normalization. Additionally, FFmpeg has a lot of settings, which I find overwhelming. For Python, I found a nice library that makes it easy to normalize audio: from pydub import AudioSegment from pydub.effects import normalize def (...)
• 07:33
  Issues with Publishing and Subscribing Rates for H.264 Video Streaming over RabbitMQ - Luis Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a project to stream an H.264 video file using RabbitMQ (AMQP protocol) and display it in a web application. The setup involves capturing video frames, encoding them, sending them to RabbitMQ, and then consuming and decoding them on the web application side using Flask and Flask-SocketIO. However, I am encountering performance issues with the publishing and subscribing rates in RabbitMQ. I cannot seem to achieve more than 10 messages per second. This is not sufficient for smooth video streaming. I need help to diagnose and resolve these performance (...)
• 06:09
  FFMPEG command error : audio device not found - Yash Rajput Newest 'ffmpeg' Questions - Stack Overflow
  So, basically i am making a google meet audio recorder (bot) and i wanna automate the audio recording process as soon as i enters into the meet. but my the code is not working as expected. I'm using the FFMPEG to record the audio and save it to the local machine at the desired location but it's throwing the error as shown in the picture.Error that i am getting I am using the correct name of my audio input device but still it's showing the same error , there's only one input audio driver installed on my machine as you can see it in a picture.name of audio (...) -- Error that i am getting, name of audio input device/driver, FFMPEG command
• 00:49
  How to get the dimensions of the first input in ffmpeg - Arjen Newest 'ffmpeg' Questions - Stack Overflow
  I have the following command: "ffmpeg -i video.mp4 -i input.png -filter_complex [1:v]scale=iw*(iw/920):-1[scaled];[0:v][scaled]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2 -c:v libx264 -c:a aac -strict experimental -pix_fmt yuv420p -y output-scaling.mp4" In the scale section, it takes the width of the input.png but i want the width of the video.mp4. Is this possible?

28 mai

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

• 12:11
  Problems using Intel Quick Sync H.264 Encoder with FFMPEG (shared) [closed] - Michael Werner Newest 'ffmpeg' Questions - Stack Overflow
  OS: Windows 11 Pro IDE: Visual Studio 2022 PL: C++ Libraries: FFMPEG shared (own x64 Windows build with libmfx) I am trying to encode frames from a framegrabber card with Intel Quick Sync Encoder using libmfx in FFMPEG shared / libav but I am getting an error always. The "same" procedure using ffmpeg.exe of same build works fine. I increased the FFMPEG logging level to the maximum level. The avcodec_send_frame function always returns -22 (which means "Invalid argument"). And I do not get more information from the log output /console. The only (...)
• 22:51
  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 (...)
• 19:48
  Can't write packet with unknown timestamp av_interleaved_write_frame(): Invalid argument - jagvetinte Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to convert a .ts file with this output to mkv: ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers built with Apple clang version 12.0.0 (clang-1200.0.32.27) configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt (...)
• 17:51
  how to fix Non-monotonous DTS in output stream 0:1; when using ffmpeg - xiao xin Newest 'ffmpeg' Questions - Stack Overflow
  When I use ffmpeg to convert m3u8 to mp4, I get some warning, ffmpeg -i xx.m3u8 -c copy demo.mp4 warning is Non-monotonous DTS in output stream 0:1; previous: 3277744, current: 3276712; changing to 3277745. This may result in incorrect timestamps in the output file. Non-monotonous DTS in output stream 0:1; previous: 3277745, current: 3277736; changing to 3277746. This may result in incorrect timestamps in the output file. what should I do to fix (...)
• 15:16
  ffmpeg not recording frames - RCam Newest 'ffmpeg' Questions - Stack Overflow
  I am using Python to record 5 second videos from 3 webcams at once using ffmpeg. The recordings repeat at intervals of ~25 seconds. The code seems to work except intermittently a recording from one of the cameras will be 0 seconds long. There don't seem to be any obvious errors, and the file is created it just doesn't contain any frames. The key components of the code are: def take_vid1(path1, video_length, sampleN): dt = datetime.now().strftime("%Y_%m_%d_%H_%M_%S") save1 = os.path.join(path1, dt+'_1'+sampleN+'.mp4') command (...) -- https://drive.google.com/file/d/1VKBBsf8pZbqNyYLE6o2C0kFHeBAh2kZ1/view?usp=sharing
• 15:35
  Error with recording headless browser in ruby - KPEBETKA Newest 'ffmpeg' Questions - Stack Overflow
  We want to create a headless browser and record and stream a page in it. To do this, we use Ferrum and ffmpeg. But there is only one image in the output video, although the video duration is correct. Code: require 'ferrum' x = Ferrum::Browser::Xvfb.new(OpenStruct.new( window_size: [1920, 1080] )) x.start b = Ferrum::Browser.new(xvfb: true, browser_options: 'display': ":#x.display_id" ) b.goto 'https://google.com' ffmpeg_command = "ffmpeg -y -video_size 1920x1080 -framerate 25 -f x11grab -i :#x.display_id (...)
• 12:26
  How to tell whether the colors in a video frame decoded by FFmpeg are pre-multiplied by alpha? - smokris Newest 'ffmpeg' Questions - Stack Overflow
  When I decode video frames with FFmpeg (avcodec_decode_video2(), sws_scale()), with some videos (e.g., ProRes4444), I get colors pre-multiplied by alpha, and with other videos (e.g., QuickTime PNG), I get colors that aren't pre-multiplied by alpha. How can I tell whether the colors are pre-multiplied? Alternatively, how can I tell FFmpeg to always provide either pre-multiplied or un-pre-multiplied ("straight alpha") colors?
• 11:03
  FFMpegCore .Net cuts off the fist few (~1.5) seconds of audio - Tim Newest 'ffmpeg' Questions - Stack Overflow
  I want to use FFMpegCore to convert some audio files to raw pcm. I noticed that this always cuts off ~1.5 seconds of my audio from the start. I check my input stream, saved it to HD all good. If use it from cli with the same arguments everything seem fine. I tried -ss 0, no luck. This behavior is observed with .wav (RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 44100 Hz), same issue with different sample rate. I tested mp3 works fine. public async Task ConvertToPcmStreamAsync(Stream inputStream) var outputStream = new MemoryStream(); var (...)
• 12:57
  FFmpeg find_package not found - YoungCoder Newest 'ffmpeg' Questions - Stack Overflow
  CMake cannot find FFmpeg even though everything is right setup. I used vcpkg to install ffmpeg I can't find any information to setup ffmpeg with CMake. I'm on Windows 10 with Visual Studio. Get findFFMPEG and put in ffmpeg folder but doesn't solve the issue. change the folder name to FFMPEG capital letters but still doesn't solve the issue. I get this error: Severity Code Description Project File Line Suppression State Details Error CMake Error at CMakeProject1/CMakeLists.txt:15 (find_package): By not providing "FindFFMPEG.cmake" in (...)
• 10:38
  How to change HLS quality in ijkplayer for flutter or alternative solutions? - gh05t Newest 'ffmpeg' Questions - Stack Overflow
  Hi can anyone help me with this issue, we decided to use the flutter ijkplayer as it's the only player on flutter that supports the option to change playback speed, but it doesn't have the option to change the hls quality, and neither does any other player as per my findings, if anyone knows please share. As for what I've tried, I download the file and split it into 4 files with each file having only one video and audio stream and use a button to change the file. I also tried to look into changing the tracks from master with the player but while FFMpeg does (...) -- github
• 10:10
  ffmpeg streaming an image failure - deonst Newest 'ffmpeg' Questions - Stack Overflow
  I am trying stream a static image on the network. Everything I have tried yet so far has failed: Examples: ffmpeg -y -stream_loop -1 -r 1 -i text2.png -vcodec libx264 -crf 17 -pix_fmt yuv420p -f mpegts udp://239.1.250.12:1234 File is generated but unplayable by VLC or any other TS capable device. ffplay complains about input frame errors but still produces a picture after a few seconds. Tried this for youtube solution as well to a local file. ffmpeg -f image2 -loop 1 -i text1.jpg -re -f lavfi -i anullsrc -vf format=yuv420p -c:v libx264 -b:v 2000k -maxrate 2000k (...)