What is the fastest why of create a thumbnail from a video by FFmpeg or anything else in WPF c#? look at the code in what I have tried section it takes about 3 seconds How can I reduce it What I have tried: string Arguments = @"-ss " +...

WPF

ffmpeg

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,...

ffmpeg

[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...

Windows

ffmpeg

[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.

Windows

ffmpeg

Using FFMPEG in C# project

17 Mar 2017 by Ahmad_Mustafa

There is a Long process to use FFmpeg in C#. I have some Questions about it when i use it in c# project and make some software using it and give to some one all the things we install to setup Other person needs these things as well ? Is there any Other easy way to setup FFmpeg in c# Project....

How to start audio and video capture /merge audio and video using aforge ffmpeg in C#

11 Jul 2017 by Ahmad_Mustafa

use this proc.StartInfo.Arguments = string.Format("-i {0} -i {1} -acodec copy -vcodec copy -map 0:0 -map 0:1 {2}", Wavefile, video1, strResult);

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...

C++

ffmpeg

Stream Player Control

25 Dec 2019 by Alexander Iacobciuc

In this article you will find an implementation of a stream player control.

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...

ffmpeg

video

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.

WinForms

ffmpeg

Opencv_ffmpeg module crash (IP camera)

27 Nov 2016 by Arthur V. Ratz

Normally, in this code, at the beginning, you declare two variables: VideoCapture cap; Mat img; You normally open the camera by invoking cap.open("http://192.168.0.101:8080/video?x.mjpeg"); method and then perform a loop to retrieve each frame from the camera device storing them into a frame...

C++

ffmpeg

OpenCV

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

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

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...

C#5.0

frame

ffmpeg

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...

Delphi

ffmpeg

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...

Delphi

ffmpeg

Another FFmpeg.exe C# Wrapper

6 Apr 2015 by Bjørn

Using the FFmepg.exe to create video snapshots

Invoke FFmpeg to export frames

5 Apr 2015 by Bjørn

Using ffmpeg DLLs directly in C# to extract frames and create a thumbnail sheet

Converting Video with FFmpegCore

23 Feb 2021 by Bohdan Stupak

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

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...

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...

C#5.0

frame

ffmpeg

the color format convert

11 Nov 2013 by chinahyin

nRet = av_image_alloc(pSrcBuff,nLines,nSrcWidth,nSrcHeight,AV_PIX_FMT_YUV420P,16) ; nDstBuffLen = av_image_alloc(pDstBuff,nDstLines,nSrcWidth,nSrcHeight,AV_PIX_FMT_RGB24,1) ; if (nDstBuffLen

C++

ffmpeg

media

Vash - A GDI+ Flash-Like Vector Animation Program

27 Apr 2016 by Clayton Rumley

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

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...

C++ mp3 decoding library

23 Mar 2012 by CPallini

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

C++

ffmpeg

MP3

Kinect C# Basketball shooting game ............

8 Feb 2013 by D-Will Barredo

Does anyone have a simple sample kinect game program using C#

ffmpeg

How to combine/merge a video and a gif using FFMPEG?

18 Feb 2018 by Donald jeffers

Please refer to this link. I hope this helps.

ffmpeg

GIF

video

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(); ...

ffmpeg

RTSP re streaming (converting) HLS streaming

20 Oct 2012 by Eldor Primov

Hi communityIs it possible to re stream RTSP to HTTP streaming? here http://superuser.com/questions/58722/how-do-i-configure-ffserverffmpeg-to-fetch-a-live-stream-in-one-format-and-outp it says to use ffmpeg and mplayer to receive and save rtsp then stream to http, but not so clear. can...

ffmpeg

HTTP

how to switch between multiple video streaming?

5 Dec 2012 by Eldor Primov

Hello community,I am struggling with switching between multiple live streams. For example, I have five live streaming servers streaming(HTTP or RTSP) and I want to put some broker between those (five) streaming sources and destination so that output to the destination would be one video...

HTTP

ffmpeg

video

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++

ffmpeg

How to start audio and video capture /merge audio and video using aforge ffmpeg in C#

16 May 2016 by Eranga Dayarathne

I have Created audio and video capture method and Save thee two file in to my location.after these two file merge in to one avi format file.in the final output file audio run first and video take delay. how to fix it. I used ffmpeg.exe for merge.are there many system for capture audio and...

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...

C++

ffmpeg

stream

Vb.net aforge video capture - memory is consumed and the camera freezes

11 Aug 2021 by Eyadox

I wrote code using Aforge to capture the Video from the camera and its working fine. My problem is when I just start the Camera in the preview mode only without recording, the camera (preview window) freezes after 15 or 20 seconds. Then I noticed...

the color format convert

10 Dec 2013 by farhad Najib

HiTry it:$ ffmpeg -s 352x288 -i foreman_cif_frame_0.yuv f.pngffmpeg version N-46810-g7750c48 Copyright (c) 2000-2012 the FFmpeg developers built on Apr 21 2013 11:12:24 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5) configuration: --enable-gpl --enable-libx264 --enable-libmp3lame ...

C++

ffmpeg

media

Screenrecorder using ffmpeg

24 Aug 2020 by Fazi_13

i am getting below the messages in cmd [dshow @ 05bdd9c0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8) [gdigrab @ 05c51800] Thread message queue blocking; consider raising the...

ffmpeg

What's the best method for rendering a decoded frame?

18 Apr 2019 by Fueled By Decaff

You are trying to perform UI(User Interface) operations on a thread that is not the UI thread. Either create and display the Bitmap in the backgroundWorker1_ProgressChanged method or use this.Invoke to execute code on the Form UI thread and generate the Bitmap and display it in the method...

ffmpeg

Bitmap

How to create video streaming for local network using C#

20 Jul 2018 by Gerry Schmitz

How to webcast using Microsoft Expression Encoder[^]

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

webcam

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...

C++

ffmpeg

OpenCV and FFMPEG connection

12 Mar 2014 by godspeed123

HiI accessed my webcam using OpenCV, and I am getting Mat of the RAW image, I want to pass this into ffmpeg to encode the stream, how do I go about doing this?Thanks in advance.

C++

ffmpeg

OpenCV

image becomes vertical lines after RGB -> YUV420 back to -> RGB conversion

14 Mar 2014 by godspeed123

HiI have a RGB24 image which I am saved on file, I am using sws_scale to convert it to YUV420 and then I wanted to verify if the conversion was done correctly so I tried converting it back to RGB24 to view the results. And all I see is vertical white and black bars. What am I doint...

C++

ffmpeg

Trying to setup MJPEG encoder in ffmpeg in C++

14 Mar 2014 by godspeed123

Hi ThereI am trying to get MJPG encoding working, I have AV_CODEC_ID_MPEG1VIDEO working, but when I switched to AV_CODEC_ID_MJPEG I get an error -22The code fails on the last part with "could not open codec".Any help would be greatly appreciated!This is the code:AVCodecID...

C++

ffmpeg

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!

C++

ffmpeg

RTSP stream encoded image using FFMPEG in C++

6 Apr 2014 by godspeed123

HiI have used ffmpeg to encode a h264 image stream, I now want to send this out using RTSP, but I dont know how to begin this. Is there a tutorial or sample code that shows setting up of a RTSP stream and sending it out using ffmpeg in RTP/UDP and C++.Any help would be greatly...

C++

ffmpeg

use of av_sdp_create from an encode AVPacket

11 Apr 2014 by godspeed123

HiI was able to encode a raw image to h264, and now I want to be able to transmit it to RTSP using live555. I want to create a sdp so I can put it into live555, so after a bunch of searching I found there is a function av_sdp_create, but I dont know how to use it... The first argument is...

C++

ffmpeg

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...

C++

ffmpeg

how to put a raw char * to AVPacket

20 Apr 2014 by godspeed123

HiI have a compressed image stored in a char * and I want to put it back to an AVPacket so that I can put it into a ffmpeg decoder. Can someone show how to do this? Any sample or tutorial would be greatly appreciated.Thanks in advance

C++

ffmpeg

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

C++

ffmpeg

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,...

C++

ffmpeg

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.

C++

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...

C++

ffmpeg

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...

C++

ffmpeg

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...

C++

ffmpeg

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...

C++

ffmpeg

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[^]

ffmpeg

image becomes vertical lines after RGB -> YUV420 back to -> RGB conversion

30 May 2014 by Ha Viet

At least, you have wrong typo atsws_scale(sws_ctx, frame2->data, ..)You need to change it tosws_scale(final_sws_ctx, frame2->data, ..)

C++

ffmpeg

Vb.net aforge video capture - memory is consumed and the camera freezes

23 Aug 2020 by Hank Williams

Have you tried using the Aforge VideoSourcePlayer control instead of the picturebox control? I think the VideoSourcePlayer control is more suited to your needs.

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) =...

C++

ffmpeg

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...

ffmpeg

directshow

installing ffmpeg to work with visual studio 2012 in c#

1 Jun 2013 by Hitesh Rohilla

how to import ffmpeg functionality in visual studio 2012 in c#?

C#4.0

VS2012

ffmpeg

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...

watermark

ffmpeg

video

installing ffmpeg to work with visual studio 2012 in c#

6 Jun 2013 by Hitesh Rohilla

Well after a more search i found a opensource ffmped code sample as well as library of ffmpeg with dll at codeplex website at FFmpeg Wrapper. It has source code from where i comes to know that i have to put 4 files with my project to achieve inbuilt functionality. so i put everything available...

C#4.0

VS2012

ffmpeg

How to watermark a video Dynamically using ffmpeg

19 Jun 2013 by Hitesh Rohilla

I want to create a video with watermark change its position to corners every 2 minutes. i found this nice sourceAdding a dynamically positioned watermark to a video via ffmpegbut that don't work to create logo at random corner locations...all the four outputs in code mentioned in...

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...

ffmpeg

video

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

RTC

streaming

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...

ffmpeg

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 =...

C++

ffmpeg

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...

ffmpeg

video

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....

DirectX

ffmpeg

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...

Windows

ffmpeg

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);...

Windows

ffmpeg

What's the best method for rendering a decoded frame?

18 Apr 2019 by ilostmyid2

In the following code, I need to know whether I used a proper method for rendering frames obtained after decoding and rescaling. Besides, I get exception. I don't know what the exception is, since I see red x instead of images after some time. using System; using System.Collections.Generic;...

ffmpeg

Bitmap

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),...

C++

ffmpeg

Using libav, how to force RTSP stream over TCP?

14 Aug 2023 by ilostmyid2

By using ffmpeg or ffplay you may specify -rtsp_transport tcp switch to force the rtsp stream be opened via tcp. In programming, I'm using libav to open the rtsp stream with the following code: AVDictionary *options = NULL; av_dict_set(&options,...

Ubuntu

ffmpeg

Merge many video files using splicer.

1 Mar 2022 by j ongamer13

Hello, I am trying to make a program that copies a specific video until the total length is longer than a specified amount. I need help trying to join them. Here is my joining code. // videos is a List containing a list of every single...

ffmpeg

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 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...

ffmpeg

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...

C++

ffmpeg

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 =...

ffmpeg

video

How to Record Twitch Streams Automatically in Python

20 Jan 2017 by Junian Triajianto

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

Python

PHP

ffmpeg

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.

C++

ffmpeg

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...

C++

ffmpeg

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.

C++

ffmpeg

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...

How to create image from byte[] send by RTP packets

11 Jul 2017 by KarstenK

Why are you sending TCP and receiving UDP packets??? Use TCP alsp on the receiver side. You should use the Image.Save() with a parameter to enforce jpeg. image.Save(path, ImageFormat.Jpeg); Else check for other problems, like the transmitted data and its size.

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.

VisualC++

C++

ffmpeg

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...

C++

ffmpeg

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.

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...

C++

ffmpeg

stream

How to create video streaming for local network using C#

20 Jul 2018 by Ledrunning

Hello! I have been working on the solution to develop video streaming services on server side using C#. In my case I need to implement videostream from file (or other stream, not any devices) to local network via Ethernet for clients. I try use AForge.NET Framework and AForge.FFmpeg.dll...

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...

C++

ffmpeg

encoding

How to convert H264 video file to MP4 file with audio

13 Mar 2022 by lingeswararaj.s

How to convert H264 video file to MP4 file with audio. When i am converting H264 to MP4, i could not get the audio when playing the video. What I have tried: I tried converting H264 file to MP4 file using ffMPEG. Its converted but audio is not...

ffmpeg

opening jpg image after saving from ffmpeg not working

30 May 2013 by link_that

In my project I am saving videos, converting formats to .swf using ffmpeg. Converting and saving the videos is working fine, but I have a problem with creating the thumbnails. It saves a "picture.jpg" but there is no image. looking at the thumbnail its only got the normal photoviewer sign which...

ASP.NET

ffmpeg

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

ffmpeg

Streaming webcam over RTSP

2 Jun 2012 by magic.on

VLC steams with RTSP, check some sites on google "stream webcam vlc"

streaming

ffmpeg

webcam

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

WinForms

ffmpeg

Video Transcoding and Streaming on the fly

13 Mar 2016 by Maxim Komlev

Experiment of Video Transcoding and Streaming on the fly to all major internet browsers (just to video tag) without Flash or Silverlight

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,...

ASP.NET

ffmpeg

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) //...

ASP.NET

ffmpeg