Questions tagged [codec]

Shorthand for "Encoder/Decoder". A codec allows to convert data into a different representation and decode it again. Codecs are mostly used in signal transmission, e.g. for audio/video playback or streaming.

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30 views

I want send RTP in ffmpeg with encode adpcm_ima_wav i get an error

i have a wave file that i want first encode it and send rtp i get an error from ffmpeg ffmpeg -i audio.wav -acodec adpcm_ima_wav -f rtp rtp://127.0.0.1:2222 give me this error "Unsupported codec ...
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Chrome video decoding GPU or CPU

If I watch a video on the internet in the chrome browser, and the video is encoded with H265 or VP9 (or the future AV1), and I have a Nvidia GPU (GTX 1080): Is the video decoding happening on the GPU ...
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Error Audio codec COD3 when installing Linux Mint 19.3 on Dell Inspiron 3593

When installing Linux Mint 19.3 on laptop DELL Inspiron 3593 4core I5 the installation stops and displays - error "Audio codec COD3" . People advised me to update by connecting to the Internet and ...
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NVIVO 12 - The Media File Format Not Recognized

I installed NVIVO 12 on a windows server 2019 machine and a Windows 7, and still get this error when I'm importing media files with .m4a, .mp3 (low and high quality), and .wav extensions. I wanted to ...
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51 views

VLC VP9 Support?

I am using the VLC Version 3.0.8 on Windows 10 Home 64-bit with an Intel Core i7-9700K CPU @3.60 GHz and 16 GB of RAM, GTX 1070 Ti with a Z390X Gaming X Motherboard So, I have made/encoded a video in ...
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80 views

H.264 video support in Chromium, missing codec?

Been using Chromium for a while, but it occurred to me that most video content does not work. YouTube does, but Vimeo does not, and most video streaming sites as well as random webpages with embedded ...
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29 views

VLC for Windows won't play MP4A audio on live stream

I'm attempting to play back a live H.264 feed in VLC for Windows (latest version). The feed comes from a HDMI to IPTV encoder. In OBS, the feed plays fine, and streams to youtube etc, audio and video ...
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52 views

How do I enable ffdshow support for AVC1 video in the VfW video settings/codecs section?

How do I enable ffdshow support for AVC1 video in the VfW video settings/codecs section? I also don't know how to either get, install or use this VfW thing. The goal is to edit video with VirtualDub ...
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146 views

Video-Codecs in Chromium missing

I use a Version 81.0.4032.0 (Entwickler-Build) (64-Bit) Chromium Browser on my Windows 10 computer. On Facebook Videos and some Gifs are not running. So I opened the Console and found this logs: ...
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How to use the correct WebP encoding?

I am trying to encode some cyclical graphic animations for Wikimedia Commons. The following article says, "The image format WebP that is based on VP8 is supported on commons. It supports both lossless ...
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114 views

Clicks and pops on my video's audio

I'm using Shotcut to make a video for my song. It's just a still image and a simple audio visualisation. I'm planning to upload it to Youtube, and need the audio to be as high quality as possible. I'...
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How can I tell if my TV will support a video based on its tech description [closed]

I'm new to this stuff and a bit confused. Based on Samsung's documentation their TVs(I have relatively new 2019 model) support most video and audio formats. Since I know that they work best with H.264,...
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607 views

ffmpeg: Could not find codec parameters for stream 0 - Video: none (H265 / 0x35363248)

I am trying to find a way to concatenate videos I am getting from an NVR. To my understanding, the video is encoded with H265, but I am not able to find more information on the specific codec (...
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How can I create a video with certain codec?

I am currently testing a video player with DASH contents and I need to create a certain content with two video tracks: one with parameter @codecs = "avc1.4D4028" and the other one with value @codecs="...
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334 views

Compressing Grayscale 8-bit PNG Sequences with ffmpeg

I typically deal with many high-resolution PNG sequences, many of which are RGB (24-bit) or entirely grayscale (8-bit). Because adjacent frames in the sequences are very similar, it is important that ...
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Rpi 4 (Buster) + VLC 3.0.8 What VLC Codec to use with marquee

I am working with a RPi 4B+ (2GB), VLC 3.0.8, an mp4 and marquees. I am running this from the CLI (not using clvc yet but will). Presently, VLC is set to automatically select the Video Codec. I have ...
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How to play 3GP video files?

I've got an Android Umidigi smartphone that records 3GP video files. I'm trying to get these to play on a Windows 7 x64 machine. For these video files, GSpot displays the following information: ...
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148 views

5k player 4k movie H264 codec isn't using hardware acceleration on GTX970 GPU

The machine I am using: OS Windows 10, 6Gb Ram, NVidia 970GTX and AMD FX6300 CPU, the media player is the latest 5k player display is 4k TV and I am trying out 4k movies, but they lag really badly. I ...
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104 views

Do video containers affect video quality ? Or is it just the codec?

Do video or audio file containers (extensions) have any repercussion with the video in itself ? Or is the codec used the only thing that has a repercussion ? For example I have the exact same video ...
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137 views

Extracting AAC LC audio from mp4 using ffmpeg

Here is the info of the file that I am working with General Format : MPEG-4 Format profile : Base Media Codec ID ...
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1answer
395 views

Lossless Video Codec supporting Alpha Channels

Suppose I have a sequence of PNG image files which may or may not contain an alpha channel (assume those that do have an alpha channel actually utilize it). While PNG files themselves have their own ...
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108 views

VLC Playback Stutters with ProRes-encoded Video

I have a 4K 60fps 3.46 GB video file that was encoded from a lossless 8bpc RGB mov video file using the following ffmpeg settings: ffmpeg -i 8bpcRGB.mov -c:v prores_ks -profile:v 2 -bits_per_mb 540 -...
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116 views

Combining MJPEG AVI with PCM WAV and encoding using H264

We are trying to set up an experiment where the subject will listen to auditory stimuli while watching a movie. We generated the WAV audio files using a PCM codec (pcm_s16le). The AVI video was ...
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102 views

Extract Mime Type codecs for MediaSource using FFprobe

I have to extract the codecs e.g. 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"' for the MediaSource API. How can I do this strictly with FFprobe/FFmpeg tools? Do not suggest other tools please.
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How to extract an elementary video stream from Avigilon .ave container?

I would like to figure out how to extract a H.264 video stream from an Avigilon .ave custom container. Unlike with here where they are using ffmpeg to extract the elementary video stream, when I try ...
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353 views

Differences in various ffmpeg h264 encoders

Can anybody explain to me the differences in these h264 ffmpeg encoders? Does any of them use GPU accelerated compression? V..... libx264 libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part ...
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How to get Opera browser v.60 (Appimage) to play Facebook videos (h.264/mp4 codec) on Xubuntu 16.04.6?

I couldn't find a way to play h.264/mp4 videos on Opera-Browser (Appimage) version 60. I've read tutorials about it but only for conventional installed packages via apt-get install or Synaptic, I don'...
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99 views

Converting a mp4 into this webM codec with FFMpeg

There is a game that uses this weird codec and I wanna know how can I convert my own mp4 file into a webm with using the game's webM settings with FFMpeg or any kind of converter. Here are the ...
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137 views

how to use ffmpeg on ubuntu to encode to dnxhr 12 bit

i've been trying to make dnxhr 12 bit files using ffmpeg and it always seems to come out as 10 bit. when i've checked, it seems that my installed ffmpeg says it should be able to do this but ffprobe ...
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67 views

Combining/Merge existing mp4 file to incoming stream buffer(RTMP)

So What i want to do when i start streaming through OBS studio i want the stream to be attached to my existing mystream.mp4 file. Right now it is overwriting old mystream.mp4 /usr/bin/ffmpeg -y -...
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Add a short video to beginning of existing video WITHOUT REENCODING..?

is it possible to add an image or short video to the beginning of an existing video WITHOUT REENCODING? Disclaimer: I am aware that not all video formats support concatenation without reencoding. Let'...
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984 views

How to change Codec ID with ffmpeg

Now I have a mpeg4 file with Codec ID 'isom (isom/iso2/avc1/mp41)'. I need to remake its ID to 'mp42' (I have to save all other settings without changes). what commands I should use in FFmpeg to do ...
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2k views

How to smoothly play .m3u8 files in Windows Media Player

Windows Media Player technically plays .m3u8 files, but it stutters between each of the audio segments. As an example, try playing https://s3.amazonaws.com/cnn-assets/app-assets/cnn-lite/liteaudio....
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295 views

Can MP3 contain AAC?

Can the container format MP3 contain an audio with a codec of ACC? I know that the MP3 container format can contain audio with a codec or MP3 (MP3 is a container and a codec); I thought that was the ...
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207 views

What is the difference between proprietary codecs and open source ones? [closed]

Let's say H.264 is a proprietary codec which is protected by patents owned by various parties. However, there is a open source h264 encoder called "x264". Do I need to pay royalty fee for using open ...
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267 views

How to Extract Video & Audio from a Corrupt File with Codec Id Mismatch (wrong track type)?

The Problem: There is a bunch of video files that can only be played with a custom player and I'd like to reverse engineer it so that the video can be played on common media players (like VLC or MPC). ...
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93 views

MPEG-4 (Base Media Version 2) codec on Debian for using Plex

i run an Plex Media Server, based on Debian 9.9.0. On this sever, are some File with MP42. Playing theese files on my Windows PC, works perfectly, but Playing theese files on the TV App doesnt Work. ...
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484 views

Hardware accelerated encoding using FFmpeg on Intel Atom based platform (UpBoard)

I am working with Intel UpBoard that has an Intel Atom CPU, and want to stream a video from a usb camera to a live stream service. Therefore I am running a h264 encoder that uses h264_qsv codec, which ...
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341 views

Why are wav and mp3 files different lengths in some tools and frameworks?

Using Audacity, I have exported a mp3 file from a very short wav file. Bringing the mp3 file back into Audacity and viewing the wav and mp3 together shows the files as different lengths with (mostly!)...
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209 views

Why isn't -ss option of ffmpeg work accurate when providing exact keyframe

I am using copy stream codec and I need not have negative PTS values in output. This is how the command looks ffmpeg -y -ss 00:44.002292 -to 01:04.022292 -i "https://drive.google.com/uc?authuser=0&...
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11k views

OBS Studio—'Failed to open NVENC codec: Function not implemented

Why do I encounter this error in OBS Studio? Failed to open NVENC codec: Function not implemented. More importantly, what can I do to resolve it so that I can record? This is a new install of OBS ...
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198 views

Is it safe to omit the codec when converting with ffmpeg?

I noticed today that I could encode or transcode video and audio streams using ffmpeg without specifying a codec, due to the fact that it seems to imply the video or audio codec being encoded or ...
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335 views

How to encode a 32 bit ALAC from a RAW using FFmpeg

Trying to compress a 32 bit floating point waveform (raw binary). FLAC is out because it only goes up to 24 bits per sample. ALAC can handle 32 bits per sample. I can encode directly from RAW to ALAC ...
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47 views

Can't change codec on OBS

I have an ASUS N53S with an NVIDIA Geoforce GT540M CUDA 1GB and 6 RAM , I want to use OBS for live streaming on Facebook but i'm having lag during streaming , they told me to change the codec but I ...
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290 views

{kdenlive} Render to webm and mp4 keeps failing: AVStream.codec error

I'm trying to render 39 minutes long video made of a few joined .MOV 1080p Canon clips. I apply a few effects to some of them, the list is (unfortunately, I don't not their exact English name): audio ...
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52 views

ffmpeg transcode loss information [closed]

I have a system taking videos of various formats as input and transcoding them into the same format for storage and processing and semantic analysis such as object detection. First, I wonder is this ...
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1answer
514 views

What's the difference in FFMPEG between using -c:v libx264, -c:v copy and -vcodec copy?

I'm trying to record video and audio from an IP Camera streaming in H.264. I found these different options: -i "camera_url" -c:v libx264 -acodec copy "out.mp4" -i "camera_url" -c:v copy -acodec ...
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213 views

Hardware accelerated mplayer does not render movie in Fedora 26

I bought a GPU for my Linux system just to be able to play movies without any glitches and issues of integrated graphics and get rid of messages like your "system is too slow to ...". Then I ...
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123 views

Why am I listening to different “piano notes” on Videos?

I have a number of MP4 files which are also available on YouTube, since long ago. These videos are basically showing Music Sheets while a Piano is playing them. The piano is not real, so this is ...
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770 views

How do I get Picasa showing MP4 videos?

My research suggests that in order to get MP4s visible in Picasa (on Windows 10) I need to either install QuickTime or a codec pack. [Edit 16 Jan 2020] To save you trying, it turns out that this is ...

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