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Vash - A GDI+ Flash-Like Vector Animation Program

by Clayton Rumley

There are those who think I am crazy, and this just might be the proof.

Another FFmpeg.exe C# Wrapper

by Bjørn

Using the FFmepg.exe to create video snapshots

How to Record Twitch Streams Automatically in Python

by Junian Triajianto

Using the power of Livestreamer and FFmpeg, twitch stream can be recorded every time a user goes online.

Converting Video with FFmpegCore

by Bohdan Stupak

A simple snippet of how you can convert video in .NET Core

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All Articles

Ffmpeg

16bit PCM streams merge?

9 Jul 2014 by godspeed123

Hi ThereI am using ffmpeg and I am able to receive PCM audio packets from 3 different mics to one program, I want to be able to merge the audio and then save it to file, but I dont know how to merge these audio inputs, I am receiving packets from each mic one at a time and I dont have a...

16bit PCM streams merge?

10 Jul 2014 by Albert Holguin

Assuming your input is synched in time and you're using the same PCM sampling on all channels... just make a "mixer"...http://stackoverflow.com/questions/5126169/programmatically-merging-two-pieces-of-audio/5126209#5126209[^]That's one example, but I'm sure you can find a handful of examples...

970530 - how to decode by GPU in ffmpeg

20 Aug 2018 by ilostmyid2

platform: Windows application: WinForm application language: C# decoder: ffmpeg Hi We're using ffmpeg to decode frames sent via network to us. The program is written in C# and uses FFmpegInvoke as well as the required DLL's like avcodec-56.dll and avutil-54.dll for decoding the frames. We need...

970530 - how to decode by GPU in ffmpeg

20 Aug 2018 by Jochen Arndt

Start by reading HWAccelIntro – FFmpeg[^]. For usage with the API check if an appropriate decoder is available and select that for decoding (requires that the library has been built with support for that decoder): // C/C++ example to use the DXVA2 decoder AVCodec* decoder =...

971029 - directx vs ffmpeg

18 Jan 2019 by ilostmyid2

hi i'm in the process of deciding how to decode received video frames, based on the following: 1. platform is Windows. 2. frames are encoded in H264 or H265. 3. GPU should be used as much 4. certainly we prefer less coding and simplest code. we just need to decode and show the result on screen....

971029 - directx vs ffmpeg

18 Jan 2019 by RickZeeland

Maybe the easiest way is to use LibVLC (which use ffmpeg too), see example here: .net - How to streaming video via VLC api in C# - Stack Overflow[^]

971108 - ffmpeg doesn't use GPU

28 Jan 2019 by ilostmyid2

I got the latest version binaries of ffmpeg from here[^]. When I examine CPU and GPU usages when I play a video by its ffplay, I see that GPU is used during play. Not much using of CPU also indicates it. But when I get the latest version sources from the original site, I can't use GPU. To...

971108 - ffmpeg doesn't use GPU

28 Jan 2019 by RickZeeland

See answers here: GPÜ-accelerated video processing with ffmpeg - Stack Overflow[^]

971130 - I get invalid argument error in avcodec_send_packet

19 Feb 2019 by ilostmyid2

In the following code: int CplayerDlg::play() { FILE *fp = fopen("video_files/1010.brf", "rb"); ASSERT(fp); RecordFrame rf; RecordHeader hdr; ASSERT(fread(&rf, sizeof(rf), 1, fp) == 1); ASSERT(rf.frameType == FRAME_TYPE_HEADER); ASSERT(fread(&hdr, sizeof(hdr), 1, fp) == 1);...

980210 - what is wrong while providing arguments for sws_scale?

30 Apr 2019 by ilostmyid2

In the following code, I can't figure out what's wrong: uint8_t *dstData[4]; int dstLinesize[4]; AVPixelFormat convertToPixFmt = AV_PIX_FMT_RGBA; int ret; // ... printf("tmp_frame format: %d (%s) %dx%d\n", tmp_frame->format, av_get_pix_fmt_name((AVPixelFormat)tmp_frame->format),...

980210 - what is wrong while providing arguments for sws_scale?

30 Apr 2019 by KarstenK

Normally the error message is more correct than the code written by some beginner. So I think you have mismatched some data or data types. Here is some working code with sws_scale which may show you to get it work. I think you should review the naming of your variables and their usage in the...

[Resolved] Batch file open incorrect

5 Jun 2015 by Adrian Andrei

Hi!I'm creating a screen recorder using FFMpeg.All works, if i double click a .bat file i obtain a .mkv file.But, automatic, if i open the .bat file using Process.Start("Path to batch file"), the batch file fails because all %% from the .bat are replaced with %. I tried to escape using...

[Resolved] Batch file open incorrect

5 Jun 2015 by Adrian Andrei

Check the autos.Check if ffmpeg images folder is the Process.WorkingDirectory.Check if images are png files.Check if there are some problems with your code.

A video file was not opened yet

21 May 2014 by Pavan Kumar

While recording video by ffmpeg VideoFileWriter class, i am getting error like 'A video file was not opened yet'here is my code : private void butStart_Click(object sender, EventArgs e) { try { FinalVideo = new...

AAC Encode

17 Feb 2012 by potluri_suresh

Raw Audio data is encoded to AAC compression using ffmmpeg library.

Accessing Microphone with FFMPEG and C++

7 Jun 2014 by godspeed123

HiI have access to a webcam through FFMPEG but now I want to grab the audio using FFMPEG and C++. Is there an example or tutorial on how to do this, and make sure it syncs up with the video?Thanks in advance

Accessing Microphone with FFMPEG and C++

7 Jun 2014 by Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Read the discussions at...1. ffmpeg recording sound from program and microphone[^]2. Easy Way to grab desktop sound with Sox[^]BlogFFmpeg Multiplexing Live Webcam and Microphone Streams[^]

accessing webcam in ffmpeg in C++

12 Mar 2014 by godspeed123

Hi I have been looking through the ffmpeg documentation and samples provided with the library and I can not figure out how to acquire a live stream from a webcam, I know it is possible, but can not figure out how to do this.Does anyone have a tutorial or some sample code to access a...

accessing webcam in ffmpeg in C++

12 Mar 2014 by Sergey Alexandrovich Kryukov

There are different aspects of this problems. Pretty much everything is described here:https://trac.ffmpeg.org/wiki/StreamingGuide[^],https://trac.ffmpeg.org/wiki/How%20to%20capture%20a%20webcam%20input[^],https://trac.ffmpeg.org/wiki/Streaming%20media%20with%20ffserver[^],see also:...

adaptive compression with ffmpeg

26 Jan 2016 by paunescuionica

I'm currently developing an application which will enable visualizing images from different sources (mostly IP cameras) in browser (in a HTML5 video element). The UI will allow for matrix view so, normally 16 or more cameras will be displayed at the same time.From cameras I get MJPEG streams...

Add timestamp in video using FFMPEG

2 Mar 2015 by AmbiguousName

Hello there. I have tried a number of options to convert a RAW mp4 file into mp4 file and showing the timestamp in it. These options are given as under//////////////////////// FIRST METHOD//// Option timestamp cannot be applied to input file. You are trying to apply input option to...

Amerge filter in ffmpeg with C/C++

14 Jul 2014 by godspeed123

Hi ThereI want to merge 2 audio streams together in C/C++ and I think I have to user amerge to do so. I have the 2 audio streams decoded in 16 bit PCM format and I want to merge them properly into one audio file. I looked around for amerge filter example but couldnt find any. Does anyone...

Amerge filter in ffmpeg with C/C++

14 Jul 2014 by nv3

The problem seems to be that you don't have a clear idea what it means to "merge" two audio streams. What you probably mean is to mix both audio signals in a way that an audio mixer would do. For that to be possible, the samples of both streams must be taken at the same points in time, i.e. the...

Another FFmpeg.exe C# Wrapper

6 Apr 2015 by Bjørn

Using the FFmepg.exe to create video snapshots

Audio decode to noise on iOS but ok on windows

30 Nov 2016 by Charly LEE

the input mp3 is single channel with 32000 sample rate, 16bit signed.I am using ffmpeg 2.6 to decode mp3 on ios9.3.2 pad. It get white noise only. but it works on windows.I record the decoded PCM to file and use tool to play it. when I changed the bit set to 32. I can hear the original sound...

Audio decode to noise on iOS but ok on windows

30 Nov 2016 by KarstenK

the solution looks really simple. AVPacket avpkt; av_init_packet(&avpkt); // set values AFTER init avpkt.data = encode_packet->data; avpkt.size = encode_packet->data_length;I am a bit confused that your old code works on Windows. But I know that the Objective-C runtime...

avcodec_encode_audio2 error nb_samples > frame_size

7 Jun 2018 by godspeed123

Hi ThereI want to encode audio using FFMPEG, but the problem is the nb_samples of the AVFrame is 22050 but the frame_size of the encoder is 1152. So how can I use avcodec_encode_audio2 function with this. Does anyone have an example of a way to do this?Thanks in advance.

avcodec_encode_audio2 error nb_samples > frame_size

7 Jun 2018 by entangledloops

You need to use a buffer, like a FIFO. See here: FFmpeg/transcode_aac.c at master · FFmpeg/FFmpeg · GitHub[^]

C++ mp3 decoding library

23 Mar 2012 by Member 8751161

I am exhausted searching for a c++ mp3 decoding library, preferably free (like lgpl) and cross-platform or for windows and mac. Can anyone suggest such library and post some tutorial for using it?ffmpeg and sdl (sdl_sound, sdl_mixer) aren't compiling. I am unable to get mpg123 working - is it...

C++ mp3 decoding library

23 Mar 2012 by CPallini

It looks[^] you may actually (cross) compile ffmpeg.

C++ mp3 decoding library

24 Mar 2012 by vonpik

What exactly you want to do with decoded file? a) If you want to play it, use irrKlang. I used it, is easy to understand. There are C++ and C# bindings. It also support many of files (*.mp3, *.ogg, *.wav, *.flac, *.ogg even *.mod (amiga modules). irrKlang have to licenses, free and...

C++ mp3 decoding library

24 Mar 2012 by Sergey Chepurin

How about BASS audio library [^]"BASS is an audio library for use in software on several platforms. Its purpose is to provide developers with powerful and efficient sample, stream (MP3, MP2, MP1, OGG, WAV, AIFF, custom generated, and more via OS codecs and add-ons), MOD music (XM, IT, S3M,...

Can framebuffer create a buffer for adding queses of images for fast rendering?

30 May 2020 by Member 14816523

Hi, I am working on the OpenGL Application. which can open and read multiple video file frames. so, in output is can play three different videos at the same time without async frames rendering. what are odds get the sync frames rendering? After...

Combining two videos one short one long and repeat short one again and again ffmpeg

15 Jun 2013 by Hitesh Rohilla

I want to combine two videosvideo details-------------1. Movie1.mp4 Video duration 62 seconds2. Movie2.mp4 Video duration 8 secondsI want to combine [overlay] these two videos with ffmpeg but what i want is that Movie2.mp4 repeat itself again and again and Movie1.mp4 runs as...

Convert a video from a format to another on MAC OSx using FFMPEG API

6 Aug 2014 by Aashish_stellar

Hello Guys, I am working on ffmpeg using its libraries on mac OSx. I am trying to transcode a video. For this I am using this : const char* inFileName = "C:\\abc.avi"; av_register_all(); AVFormatContext* inContainer = NULL; if(avformat_open_input(&inContainer, inFileName, NULL,...

Convert bmp to yuv and save

20 Apr 2013 by liaoyuandeyehuo

I use this way to convert bitmap to yuv Save bitmap to video (libavcodec ffmpeg) and then save the buffer like this: FILE* fp=fopen("aha.yuv","w"); if(!fp) return NULL; fwrite(outPic->data[0],nbytes,1,fp); fwrite(outBuffer,nbytes,1,fp); fclose(fp); but it has only several lines.All most all of...

Convert bmp to yuv and save

21 Apr 2013 by merano

1. Please format your Source with code tag like thisFILE* fp=fopen("aha.yuv","w");if(!fp) return NULL;fwrite(outPic->data[0],nbytes,1,fp); fwrite(outBuffer,nbytes,1,fp);fclose(fp);2. You should use fopen() in binary mode3. Can´t see writing you Fileheader or Bitmap-Header,...

Convert raw files to mp4 video using C++ with ffmpeg

4 Oct 2017 by StefanAdmin@123

I want to convert a raw files to mp4 video format using ffmpeg and i want to implement it using C++. How do i go about it. I have configured libs and include folder in visual studio set up.I will be glad if i could get a useful link or sample code in C++. What I have tried: I don't know how to...

Convert raw files to mp4 video using C++ with ffmpeg

4 Oct 2017 by KarstenK

You best start at the ffmpeg documentation site. I also like to mention the ffmpeg examples. Maybe that stackoverflow answer helps you in your problem. It is a complex library so you will have to learn a lot.

Converting Video with FFmpegCore

23 Feb 2021 by Bohdan Stupak

A simple snippet of how you can convert video in .NET Core

Create ffmpeg.c using vc++

14 Mar 2013 by OSHO580

Hello friends,I want to develop wrapper class in VC++ 2010 of ffmpeg.c. is it possible or not . If it possible please guide me how can i start to do this work. I have already started but i got lot of linker error. I have also mentioned extern "C" for header file . I have also included all lib...

Creating a livesource audio class for live555

19 Aug 2014 by godspeed123

HiI am trying to setup live555 to stream rtsp with an ondemandserver from a microphone, but I am not sure how to do so. I have attempted to do this by overriding OnDemandServerMediaSubsession and FramedSource, but I am running into issues where I hear a bit of sound for half a second and...

Decoding video packets received from tcpreplay using C++/qt

11 Sep 2020 by Sharma Dilip

I have a PCAP file having the encoded video data. I am using TCPReplay to broadcast this PCAP data to my server. In my server I have written a QT UDP socket program to receive these packets. I am able to receive these packets successfully in my...

Decoding video packets received from tcpreplay using C++/qt

11 Sep 2020 by KarstenK

You should contact the folks of tcpreplay. Normally you have some decoding functions which are doing the jobs. Best is to search for some sample code.

Encode Playback device capture audio data and write an mp3 file

15 Oct 2013 by CodingHell

I'm working on a project in which I'll have to encode my audio data.I can capture the audio and create a .wav file but I want to compress it and make it an mp3 or .aac file.I'm using ffmpeg for encoding.If someone has done this.. Please help me.If necessary I'll post my code and...

Encode to 4K resolution - ffmpeg

6 Jan 2021 by Richard MacCutchan

See ffmpeg Documentation[^]

Error in complexfilter in fluent-ffmpeg

4 Jun 2023 by Nobunaji

Hi, i have the following complex_filter in a fluent-ffmpeg function : .complexFilter([ { filter: "volume", options: [string], inputs: "1", outputs: 'audio', eval: 'frame' }, { filter:...

Error when I use aforge FFMPEG

10 Sep 2016 by Richard MacCutchan

See VideoFileReader Class[^] for instructions on installation and usage.

Error when I use aforge FFMPEG

10 Sep 2016 by ghasem110deh

hi guy'si use Aforge lib in my project for capture image and record live video from webCam ...but when use ffmpeg.dll to save AVI file from webCam send this Error :private VideoFileWriter FileWriter = new VideoFileWriter(); FileWriter.Open("test.avi", 460, 500, 25,...

ffmpeg adding watermark to video

8 May 2012 by AR1988

HiDoes anyone know how to use the ffmpeg tool to add a watermark to a video,if anyone does please I need the syntax and the resources required if addition dlls are to be introduced.Thanks in advance.

ffmpeg adding watermark to video

8 May 2012 by Manfred Rudolf Bihy

Here is a video that hows you how to do it: Add a Watermark to a Video with ffmpeg[^]. This video shows how to do it under unix. If you're on windows just vhook the watermark.dll instead of watermark.so.Please always try something first!Regards,Manfred

ffmpeg audio pts/dts C++

10 Jul 2014 by godspeed123

Hi ThereI am trying to understand the pts value in an audio encoded packet in ffmpeg.I checked my timebase to be 1/44100and some pts values : 70754080000, 70759090000, back to back packet pts values.I dont know how to convert that to real time. I would imagine it having...

ffmpeg audio pts/dts C++

11 Jul 2014 by KarstenK

read the avformat.h there stands:/* AVPacket.pts, AVPacket.dts and AVPacket.duration timing information will be * set if known. They may also be unset (i.e. AV_NOPTS_VALUE for * pts/dts, 0 for duration) if the stream does not provide them. The timing * information will be in...

FFMPEG encodin audio from PCM to AAC in C++

17 Jun 2014 by godspeed123

Hi ThereI am looking for some code that will allow me to to convert PM audio to AAC. I have written an attempt at it but I keep getting error -22 when trying to do the econding. Code is written below. Any help would be greatly appreciated!while( res = av_read_frame( pFormatCtx,...

FFMPEG encodin audio from PCM to AAC in C++

17 Jun 2014 by KarstenK

you have better chances by searching ffmpeg contacts direct.Looks like here is some sample code available.

FFMPEG encodin audio from PCM to AAC in C++

17 Jun 2014 by Sergey Alexandrovich Kryukov

I have one specific advice for you: build the utility ffmpeg.exe and give it the command-line arguments likeffmpeg -i someInputFile.wav outputFile.aacRun it under the debugger and see what happens. This is a great library and utility, but it's very big and have some legacy "noise" in it, due...

FFmpeg Filters Every Youtuber Needs

5 Nov 2023 by V. Subhash

A simple fix for excessively bright video and low-volume audio

ffmpeg has memory leak

23 Jul 2014 by SoSoLue

I got some question, in my code,this project will get video stream from camera,and encoder with ffmpeg lib and x264,then both save in a .mp4 file, upload to rtmp server.now, when I stop get stream and encode,VS2012 show the memory leak, but it cant locate the memory leak code.can...

Ffmpeg not creating file running through .NET like when in CMD

16 Aug 2018 by Member 13948830

I am working on a small project that needs to use ffmpeg to pull out some video from the main video. I have called the following within a command prompt and get my 8 second video named correctly in the folder: ffmpeg -ss 00:47:25 -t 8 -i C:\\Personal\\TestData\\MainVideo.mp4 -vcodec copy...

Ffmpeg not creating file running through .NET like when in CMD

16 Aug 2018 by Member 13948830

This is what I did to finally get it to work var processStartInfo = new ProcessStartInfo(@"C:\FFmpeg\bin\ffmpeg.exe"); processStartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; ...

Ffmpeg output log in text file using C#

9 Nov 2017 by arunavachowdhury

This is a simple code to create ffmpeg log output in a file instead of console. But this code doesn't create an output log file wherein the same arrangements when used in command prompt it works. Can anybody help in this? what more needs to be done to get the output in the log file? Regards...

Ffmpeg output log in text file using C#

8 Nov 2017 by Richard MacCutchan

A quick check with your debugger would show you that your parameters are wrong as you have unescaped backslashes in your strings. So the code: string fullPath = "d:"; string fileName= "wildlife.wmv"; string pathfile = "D:"; process.StartInfo.Arguments = "-i \"" +...

Ffmpeg output log in text file using C#

9 Nov 2017 by arunavachowdhury

Tried with the above code but its not working. When we run ffmpeg with the same code we need to remove the final "\" after ffmpeglog.log to generate the log. When I am using " -i \"d:\\wildlife.wmv 2> \"D:\\ffmpeglog.log\"" The log is not generating but cannot remove the "\" from the string...

FFMPEG RTMP stream to MPEGTS conversion

3 May 2018 by Hitesh Rohilla

I am not a pro in FFMPEG but since working on it on non-frequent bases I tried to search for the solution but didn't get one However, I get one for RTSP FFMPEG -rtsp_transport tcp -i "rtsp://://" -f mpegts -codec:v mpeg1video -b:v 800k -r 30 - But my streaming is...

FFMPEG Watermark process if very slow

3 Jun 2013 by Hitesh Rohilla

I am working on a video processing project and using ffmpeg for watermarking. I achieve exactly what i want but the problem is that the process is very very slow.I am using a Intel Smart 2nd gen family Core-i5 Processor with 4GB RAM on a 32 bit operating system Microsoft Windows-8 on a...

FFMPEG write header error

9 Jun 2016 by Member 11549235

Hi, I'm working on a FFMPEg Project and trying to write a file with a stream. But when I call avformat_write_header it always throws an errr. Here's the code:AVCodecContext *codecctx; AVFormatContext *fmtctx; fmt=av_guess_format(NULL,filename,NULL); if(!fmt) printf("Das Format kann...

FFMPEG write header error

8 Jun 2016 by Jochen Arndt

Like Richard I do not know ffmpeg well. But the documentation for avformat_write_header[^] states for the first parameter:Quote:Media file handle, must be allocated with avformat_alloc_context(). Its oformat field must be set to the desired output format; Its pb field must be set to an...

FFMPEG write header error

9 Jun 2016 by Member 11549235

The Problem is i forgot to call avio_open. Now I'm trying to add a png Image to the stream, but don't know how to convert it to an useable Frame. Can you give me some hints?

FFMPEG: Once encoded data, how to send out via RTP/UDP via FFMPEG

16 Mar 2014 by godspeed123

Hi ThereI have a h264 encoded stream in ffmpeg, but i want to transfer it out via RTSP, RTP/UDP, I know FFMPEG has the capability but I dont know where to start. I there a C++ tutorial showing this, or some sample code to start with?Thanks in advance!

h264 compressed data, how to extract PPS/SPS

20 Apr 2014 by godspeed123

Hi ThereI have used ffmpeg to compress raw data to h264. Few questions, when the image is compressed is the PPS/SPS going to be at the front of each compressed frame? I see that there is a 0001 in front of the data, is there some way of passing the frame to a h264 dump application to...

H264/MP4 live stream from ffmpeg does not work in browser

20 Sep 2018 by paunescuionica

I cannot visualize a H264/MP4 stream generated by ffmpeg in Chrome, IE, Edge. It works only in Firefox. My testing environment is Windows 10, all updates done, all browsers up to date. What I have tried: I have a source MJPEG stream, which I need to transcode to H264/MP4 and show it in...

Hello I Need A Some Istructions To Use Ffmpeg, I Would Like A Code To Get Media File Info

16 Jul 2014 by Vlad Budeac

var player = new WindowsMediaPlayer();var clip = player.newMedia(file.FullName);lblLenght_.Text = (TimeSpan.FromSeconds(clip.duration)).ToString(); ShellFile shellFile = ShellFile.FromFilePath(file.FullName);lblFPS_.Text = (shellFile.Properties.System.Video.FrameRate.Value /...

Hello I Need A Some Istructions To Use Ffmpeg, I Would Like A Code To Get Media File Info

16 Jul 2014 by Sergey Alexandrovich Kryukov

Do on simple step, look not at FFMPeg application, but at FFProbe. You can always download its source code and see what it does. Then, you can either start FFProbe as a separate process with appropriate command-line parameters, redirect its output stream StandardOutput (and StandardError) and...

How can I catch devices using ffmpeg and C#?

26 Oct 2017 by Graeme_Grant

You want to "capture" the output? This should answer your question: Capturing console output from a .NET application (C#) - Stack Overflow[^]

How can I catch devices using ffmpeg and C#?

26 Oct 2017 by hsafavi

I want to catch devices using ffmpeg.exe. i used Process class and related ffmpeg command but no success What I have tried: i used following code but the output is nothing!! i think it happens because the process exited as soon as process.start() executed. how can i do that? static void...

How can I catch devices using ffmpeg and C#?

1 Feb 2024 by El Bunda7

I had the same issue. I was redirecting the standard output, but FFmpeg outputs text messages to the standard error. static void Main(string[] args) { ProcessStartInfo startInfo = new ProcessStartInfo(); ...

How Can I Get File Is Uploaded Or Not

18 Dec 2015 by Member 11324668

Hi i have a simple question, i have window service that run in specific interval.Now i have one issue when user upload a big file and during same time window service run and convert that file to mp4 using ffmpeg but original video is not uploaded completely. therefor converted video does not...

How Can I Get File Is Uploaded Or Not

18 Dec 2015 by Jochen Arndt

Your FTP server should know which files are actually being uploaded.A good implemented server would also lock the file even for reading while the upload is in progress. Then your service might detect the new file but will be not be able to open it.If there is no read lock, there should...

how can I learn directshow and ffmepg

25 Jul 2013 by hbbiao

looking for advice on how to learn directshow and ffmpeg.i have compiled some projects available on the internet ,but i still can't quite understand ,especially how to syncronize audio and video ,is timestamp contained in the file container like avi, mpeg,or included somewhere else ,because i...

How can I record sound card to mp3 with ffmpeg in windows?

18 May 2019 by son0nline

How can sound be recorded programmatically in Windows into mp3? What I have tried: Nothing - this is an old question that deserve an answer for the rest of the Code Project community.

How can I record sound card to mp3 with ffmpeg in windows?

18 May 2019 by Michael Haephrati

I would start here[^] and follow the guidelines.

How do I broadcast live audio in node.js?

19 Jun 2020 by Jo Aqra

I'm trying stream live audio to a wide range of clients in a web browser. My current solution : Dotnet core 3.1 console application -receive the audio data over UDP -trimming the first 28 bytes of each received packet -and send the processed...

How do I create a proper numpy using ffmpeg to use with opencv

10 May 2021 by Member 15192080

Hi everyone, I'm trying to convert with ffmpeg-python every frame of a video in a numpy array that could work with opencv What I have tried: Here my code: for i in (frames): out, _ = ( ffmpeg ...

How do I make a C# win form program that breaks a video down to frames, then put those frames back together to make a video?

30 Jul 2015 by Atom Scott

First, I'm fairly new to see sharp so I'm looking for a thorough and easy to understand answer.How do I make a C# win form program that breaks a video down to frames, then puts those frames back together to make a video?I also want to be able to select which frames to extract by setting an...

How do I make a C# win form program that breaks a video down to frames, then put those frames back together to make a video?

30 Jul 2015 by CHill60

If you can't understand the code presented we are unlikely to be able to help you much in a Quick Answers Forum! However - your first link - you can put the code wherever you like. A button click event would be appropriate, amongst other options.The missing reference on your 2nd link is...

How do I sync audio when playing video at different rate using FFMPEG and SDL

1 Sep 2021 by bazzabahuloo

Hi I have an AVPlayer written in Delphi using the FFMPEG libraries. This basically implements a video player as per FFPLAY but under Delphi. I want to add variable speed video playback to this player, which is easy on the video side as you...

How do I sync audio when playing video at different rate using FFMPEG and SDL

2 Sep 2021 by bazzabahuloo

I managed to get this working for me by making a change in the stream reader thread for Audio when video is playing at anything other than normal speed. I am not sure this is the correct place, but it seems to work well at both high and low...

How Do I Use Ffmpeg To Upload Video Files

24 Aug 2014 by Member 10235977

I am trying to upload video files in an ASP.NET website using C#. I have downloaded ffmpeg library files from www.afterdawn.com/software/audio_video/convert_video/ffmpeg.cfm"and pasted it in a folder ffmpeg. my ffmpeg has a subfolder also named ffmpeg contaiing files ffmpeg.exe,...

How Do I Use Ffmpeg To Upload Video Files

24 Aug 2014 by Sergey Alexandrovich Kryukov

This approach can work, but you are not doing all appropriate steps. First of all, you need to formulate the question accurately. FFMpeg has nothing to deal with "uploading" (however, it can be very helpful for downloading files delivered through some streaming protocol, a tool which is hard to...

How do I use ffmpeg work on a website on server

9 Oct 2014 by Member 10235977

I am trying to use ffmpeg to convert a video to mpg on my ASP.NET site (C#)My code is as follows:string videoname = name of video uploaded on site in folder Videos without extenstion; string videoext = extension of video //or example .mpg) //...

How do I use ffplay seek after 26.5hour when the m3u8 file is big than 26.5hour

29 Aug 2016 by hansonzou

the particulars is i save a rtsp stream to ts file by ffmpeg per 10 second , it may last for a long time(more than 26.5hour), when it done, it will save a m3u8 file, after that, i use ffplay to play then m3u8 file, if i want to seek to 26.7hour , the play must be stoped. -----PTS (sec) =...

How do I use ffplay seek after 26.5hour when the m3u8 file is big than 26.5hour

29 Aug 2016 by KarstenK

The only way I see is to split the files in parts with playtime less but roughly the 26.5 h and than compute the offset and seek the correct subfile.

How do you create a custom FFMPEG IO-context with std::ifstream?

26 Jun 2021 by Eric Stevens 2021

I've been referencing this article about how to create a custom IO-Context with FFmpeg, but he invoked the use of an IStream interface. I am simply just trying to use an std::ifstream object in order to create the Context and proceed with opening...

How do you create a custom FFMPEG IO-context with std::ifstream?

26 Jun 2021 by KarstenK

It looks like you missed some steps to create working code with not initializing your audio_file. It needs to be created before used. Maybe you read some ffmpeg tutorial to start. The ffmpeg is tricky so stick the documentation and working code...

How I cam create video from sequence images

26 Mar 2020 by Member 14129828

I tried to create a video from a sequence image using FFmpeg in c#. I wrote this code but I didn't get the output how to solve this problem...thanks What I have tried: public void Execute() { using (var...

image-processing

How I cam create video from sequence images

26 Mar 2020 by Maciej Los

Please, take a look at answered question: Converting Images into Video using C#[^] You can also be interested in this project: GitHub - mmaitre314/PictureMovie: Create MP4 videos from JPG/PNG/GIF/BMP images[^] Other links:...

image-processing

How may I free pkt in an ffmpeg write frame method

28 Feb 2014 by radnix

GreetingsI'm looking at an ffmpeg source code example at :http://svn.perian.org/ffmpeg/ffmpeg.c[^]In the code, I'm focusing on a method that writes the video frame.Here is that method:static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx,...

How may I free pkt in an ffmpeg write frame method

4 Mar 2014 by radnix

Well, I did finally get it working and will post my particular solution here with the hope it may help others. Oh, almost forgot. If you have a suggestion for change to this code, please do:static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx,...

How may I free pkt in an ffmpeg write frame method

5 Jun 2015 by Igor Oleynikov

AVPacket new_pkt = pkt;int a = av_bitstream_filter_filter(m_bsfDecoderContext, out_stream->codec, NULL, &new_pkt.data, &new_pkt.size, pkt.data, pkt.size, pkt.flags & AV_PKT_FLAG_KEY); av_free_packet(&pkt); pkt.data = new_pkt.data; pkt.size =...

How to achieve playback of DirectShow filter at difference rates

26 Jul 2015 by parisonj

Hi,Does anyone have any good tips or practical experience on controlling the playback rate of video/audio streams?Using SetRate() doesn't seem to give me reliable (smooth) results, certainly above values of 2.0, and often locks up completely.Ideally, I need to typical rates of x1, x2,...