8 août

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

• 14:06
  How can i mux H264 stream into MP4 file via libavformat - Brian Newest 'ffmpeg' Questions - Stack Overflow
  I want to realize an application that firstly decode a multi-media file(such as test.mp4 file, video codec id is H264), get a video stream and an audio stream, then make some different in the audio stream, at last encode the video stream(use libx264) and audio stream into a result file(result.mp4). To promote the efficiency, i omitted the decode and encode of video stream, i get the video packet via function "av_read_frame", then output it directly into the result file via function "av_write_frame". But there is no picture in the output file, and the size of output file is fairly (...)

7 août

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

• 17:49
  FFMPEG screen recording for windowed frames [closed] - Vibhor Karnawat Newest 'ffmpeg' Questions - Stack Overflow
  So I want to do screen-recording using ffmpeg for all windows application.FFMPEG normally is working for most of the application but I don't get any frames when application is windowed full screen , Which Later I find out it is because those frames goes for gpu, and ffmpeg can't access gpu frames So I tried to build the ffmpeg with directX that is d3d11grab but I am not able to do So I have cloned the ffmpeg-msvc github and added the nvenc paths and using below command to build it ./configure \\ --toolchain=msvc \\ --prefix=/mingw64 \\ --enable-gpl (...)
• 21:04
  How to handle DHAV (.dav) video streams? - Mateus Henrique Newest 'ffmpeg' Questions - Stack Overflow
  I have a WPF app where I need to handle DHAV (.dav) video stream on runtime from a Digital Video Recorder (DVR). I'm using an SDK that can be found here Dahua SDK search SDK: General_NetSDK_Eng_Win64_IS_V3.052.0000002.0.R.201103 I need to handle every single frame from the video stream, convert it to a BitmapImage and then displays it in a WPF Image control. Something like: MJPEG Decoder The problem is that I can't find any documentation on how to handle that data and the samples from the SDK doesn't show that either, instead they are built with WinForms (...) -- Dahua SDK search, MJPEG Decoder
• 15:13
  How to finalize LL-DASH stream MPD file using Shaka Packager - Arjit Newest 'ffmpeg' Questions - Stack Overflow
  I'm using Shaka Packager with FFmpeg piping to produce LL-DASH live streams from an NGINX-RTMP input. Streaming works fine, but when the publisher stops streaming, Shaka Player continuously trying to fetch & throws 404 errors for segment files that don’t exist. For example, if the last segment is 29.m4s, the player still tries to fetch: GET http://localhost:8080/dash/stream/480p_30.m4s 404 (Not Found) GET http://localhost:8080/dash/stream/720p_31.m4s 404 (Not Found) Even though the stream ended at segment 29. Shaka-packager: "$SHAKA_PACKAGER_BIN" (...)
• 06:14
  How to write a video stream to a server? - The Mask Newest 'ffmpeg' Questions - Stack Overflow
  Recently been playing with ffmpeg and it's powerful abilities. Working on a cool project where I'm trying to create a live video stream using FFMPeg. The client(reactJs) and server(nodeJS) are connected via web-socket. The client sends the byte packets to server and the server then spawns an ffmpeg process and serve it to an nginx server. Client(live-stream.js): const stream = await navigator.mediaDevices.getUserMedia( video: true, audio: true, ); videoRef.current.srcObject = stream; const ingestUrl = `ws://localhost:8081/ws` const (...)

6 août

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

• 18:37
  How to append dummy frames to FFmpeg pipe after EOF to prevent Shaka Packager from stopping (LL-HLS/LL-DASH)? [closed] - Arjit Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a live streaming pipeline where I pipe FFmpeg into Shaka Packager to generate LL-HLS and LL-DASH output from an RTMP stream. Scenario: FFmpeg receives the RTMP stream and pipes the output to Shaka Packager. When the RTMP publisher stops streaming, FFmpeg naturally ends, sending an EOF (end-of-file) to the pipe. This causes Shaka Packager to stop processing, as it closes its read stream on EOF. What I want: Before FFmpeg terminates, or even after, I want to append 5 seconds of black dummy frames (video + silent audio) to the pipe, so (...)
• 21:20
  Shaka Packager + FFmpeg piping: EXTINF durations are incorrect (0.033 instead of 2s) in HLS playlist [closed] - Arjit Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFmpeg and Shaka Packager(piping) to create a low-latency HLS (LL-HLS) stream from an RTMP input. pipe: VIDEO_720P_FIFO="$OUTPUT_BASE_DIR/video_720p.pipe" VIDEO_480P_FIFO="$OUTPUT_BASE_DIR/video_480p.pipe" AUDIO_FIFO="$OUTPUT_BASE_DIR/audio.pipe" mkfifo "$VIDEO_720P_FIFO" mkfifo "$VIDEO_480P_FIFO" mkfifo "$AUDIO_FIFO" shaka-packager: "$SHAKA_PACKAGER_BIN" \\ "in=$VIDEO_720P_FIFO,stream=video,format=mp4,init_segment=$STREAM_OUTPUT_DIR/720p_init.mp4,segment_template=$STREAM_OUTPUT_DIR/720p_\\$Number\\$.m4s,bandwidth=3000000,hls_nam
• 19:35
  Could not find com.arthenica:ffmpeg-kit-full:6.0-2 [closed] - gabocalero Newest 'ffmpeg' Questions - Stack Overflow
  I started receiving this message when I build my project > Could not find com.arthenica:ffmpeg-kit-full:6.0-2. Searched in the following locations: - https://dl.google.com/dl/android/maven2/com/arthenica/ffmpeg-kit-full/6.0-2/ffmpeg-kit-full-6.0-2.pom - https://repo.maven.apache.org/maven2/com/arthenica/ffmpeg-kit-full/6.0-2/ffmpeg-kit-full-6.0-2.pom - https://jcenter.bintray.com/com/arthenica/ffmpeg-kit-full/6.0-2/ffmpeg-kit-full-6.0-2.pom - https://jitpack.io/com/arthenica/ffmpeg-kit-full/6.0-2/ffmpeg-kit-full-6.0-2.pom - (...) -- project's github page,

5 août

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

• 19:31
  Convert audio files to mp3 using ffmpeg [closed] - Hrishikesh -Rishi- Choudhari Newest 'ffmpeg' Questions - Stack Overflow
  I need to convert audio files to mp3 using ffmpeg. When I write the command as ffmpeg -i audio.ogg -acodec mp3 newfile.mp3, I get the error: FFmpeg version 0.5.2, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 1 / 52.20. 1 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 built on Jun 24 2010 14:56:20, gcc: 4.4.1 Input #0, mp3, from 'ZHRE.mp3': Duration: 00:04:12.52, start: 0.000000, bitrate: 208 kb/s Stream #0.0: Audio: mp3, 44100 Hz, (...)
• 14:04
  FFmpeg audio encoder new encode function - mattobob Newest 'ffmpeg' Questions - Stack Overflow
  I would like to update an AV Audio encoder using function avcodec_encode_audio (deprecated) to avcodec_encode_audio2, without modifying the structure of existing encoder: outBytes = avcodec_encode_audio(m_handle, dst, sizeBytes, (const short int*)m_samBuf); where: m_handle AVCodecContext dst, uint8_t * destination buffer sizeBytes, uint32_t size of the destination buffer m_samBuf void * to the input chunk of data to encode (this is casted to: const short int*) is there a simply way to do it? I'm trying (...)
• 13:04
  very low latency streaminig with ffmpeg using a webcam - userDtrm Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to configure ffmpeg to do a real-time video streaming using a webcam. The ffmpeg encoder command I use is as follows. ffmpeg -f v4l2 -input_format yuyv422 -s 640x480 -i /dev/video0 -c:v libx264 -profile:v baseline -trellis 0 -subq 1 -level 32 -preset superfast -tune zerolatency -me_method epzs -crf 30 -threads 0 -bufsize 1 -refs 4 -coder 0 -b_strategy 0 -bf 0 -sc_threshold 0 -x264-params vbv-maxrate=2000:slice-max-size=1500:keyint=30:min-keyint=10: -pix_fmt yuv420p -an -f mpegts udp://192.168.1.8:5001 The ffplay command used to display the video (...)

4 août

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

• 20:07
  Command-line streaming webcam with audio from Ubuntu server in WebM format - mjtb Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to stream video and audio from my webcam connected to my headless Ubuntu server (running Maverick 10.10). I want to be able to stream in WebM format (VP8 video + OGG). Bandwidth is limited, and so the stream must be below 1Mbps. I have tried using FFmpeg. I am able to record WebM video from the webcam with the following: ffmpeg -s 640x360 \\ -f video4linux2 -i /dev/video0 -isync -vcodec libvpx -vb 768000 -r 10 -vsync 1 \\ -f alsa -ac 1 -i hw:1,0 -acodec libvorbis -ab 32000 -ar 11025 \\ -f webm /var/www/telemed/test.webm However (...)
• 17:28
  Why does ffmpeg command work in terminal but not subprocess.call - Brian Newest 'ffmpeg' Questions - Stack Overflow
  I reviewed the "similar questions", but those seem to refer to using the full path for ffmpeg to ensure using the same version, which I am already doing so posting my question. I am using a Mac runnning Sequoia 15.5, python 3, and ffmpeg 4.2.1. I'm trying to write a script that can convert flac to mp3 320k. If I use the following command in terminal everything works as intended: /usr/local/bin/ffmpeg -i "/Volumes/MainData/Media/Media Server/_Stage/03 - People Like Us - Aaron Tippin.flac" -b:a 320k -map_metadata 0 -id3v2_version 3 "/Volumes/MainData/Media/Media (...)
• 12:39
  How to stop ffmpeg remotely? - Adam Newest 'ffmpeg' Questions - Stack Overflow
  I'm running ffmpeg on another machine for screen capture. I'd like to be able to stop it recording remotely. FFMPEG requires that q is pressed to stop encoding as it has to do some finalization to finish the file cleanly. I know I could kill it with kill/killall however this can lead to corrupt videos. Press [q] to stop encoding I can't find anything on google specifically for this, but some there is suggestion that echoing into /proc//fd/0 will work. I've tried this but it does not stop ffmpeg. The q is however shown in the terminal (...)
• 00:27
  VFR input + h264_nvenc - output bitrate is based on initial frame rate when I want it to be time based [closed] - hedgehog90 Newest 'ffmpeg' Questions - Stack Overflow
  I have an HLS stream produced from a live VFR source in ffmpeg. The source consists of blocks of varying frame rate. The first 30 minutes might be 24fps, the next 30 minutes ⓐ 60fps. Although it is not standard for HLS to be VFR, it appears to playback perfectly well on various platforms I've tested. When I use the libx264 encoder with -crf + -maxrate parameters, I can get my desired bitrate per stream despite potentially wild frame rate fluctuations. But when I use the h264_nvenc encoder with -cq + -maxrate parameters (and practically every configuration (...)
• 05:00
  Shaka Packager not adding #EXT-X-ENDLIST to HLS playlist after stream ends - Arjit Newest 'ffmpeg' Questions - Stack Overflow
  I am using Shaka Packager for live streaming with HLS & DASH output. My setup is like this: RTMP stream is published to NGINX-RTMP. On exec, I start a transcoder (FFmpeg) and packager (Shaka Packager). On exec_publish_done, I stop both processes. Here’s the command I use to start Shaka Packager: "$SHAKA_PACKAGER_BIN" \\ "in=$VIDEO_720P_FIFO,stream=video,format=mp4,init_segment=$STREAM_OUTPUT_DIR/720p_init.mp4,segment_template=$STREAM_OUTPUT_DIR/720p_\\$Number\\$.m4s,bandwidth=3000000,hls_name=720p" \\  (...)

3 août

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

• 22:27
  How do I deploy Whisper.cpp stream.wasm on an EC2 instance? [closed] - tosUser Newest 'ffmpeg' Questions - Stack Overflow
  How do I deploy the whisper.cpp stream.wasm demo on a EC2 instance? The demo is available from the following git: https://github.com/ggml-org/whisper.cpp/tree/master/examples/stream.wasm I am fairly far along, but the program hangs on Preparing ... I do not know what is causing the issue. Here are the steps I have taken. (I am trying to make it brief, and provide more detail as necessary.) I cloned the repository and built it locally. It runs properly. I created an EC2 instance running Amazon Linux 2023, and uploaded the Whisper.cpp files to it. I (...) -- https://github.com/ggml-org/whisper.cpp/tree/master/examples/stream.wasm
• 19:55
  Vulnerability in file processing [closed] - alex Newest 'ffmpeg' Questions - Stack Overflow
  I have discovered a vulnerability in the file processing service. If I create an MPD file with a link inside it, then when processing with ffmpeg, an attacker can receive a request to their server, which can lead to serious security issues. Once they know the IP address, they can launch an attack. I'm not quite sure how to deal with this. Are there any libraries for analysing files for malicious content? Yes, I thought about restricting the container's network interface or running file processing services in a sandbox, but I still know very little about combating malicious code (...)

2 août

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

• 04:47
  Can not add tmcd stream using libavcodec to replicate behavior of ffmpeg -timecode option - Sailor Jerry Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to replicate option of command line ffmpeg -timecode in my C/C++ code. For some reasons the tcmd stream is not written to the output file. However the av_dump_format shows it in run time Here is my minimal test #include extern "C" #include #include #include #include #include #include #include bool checkProResAvailability() const AVCodec* codec = avcodec_find_encoder_by_name("prores_ks"); if (!codec) std::cerr << "ProRes codec not available. Please install FFmpeg with ProRes (...)
• 04:31
  ffmpeg libx264 settings to keep exact colors - vinni Newest 'ffmpeg' Questions - Stack Overflow
  does anyone have an idea how I need to edit these ffmpeg settings to keep the original colors? I'm trying to convert a video, but need to absolutely keep the rgb colors, as it's going to be embedded into a website with a background color. The parameters look currently like this: '-acodec aac -ac 2 -ab 160k ' '-vcodec libx264 -preset slow -profile:v baseline -level 25 ' '-maxrate 10000000 -bufsize 10000000 -vb 1200k -f mp4 ' '-threads 0'  (...)