Questions tagged [codec]

A 'coder-decoder' computer program capable of encoding and/or decoding a digital data stream or signal.

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What actually distinguishes various MPEG-4 Part 2 video codecs (divx, xvid, mpeg4, msmpeg4v1, mp4v, etc.)

I recently audited a large folder containing a variety of encoded videos from 2002-2014. Using ffmpeg, I extracted and recorded metadata, including the video codec used on the film. An example command ...
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ffmpeg to output something video/mp4; codecs="avc1.42401f" can read

I have a webapp that plays a video through the MediaSource API. The codec is set to video/mp4; codecs="avc1.42401f" and I cannot change that. I'm able to play the following file https://...
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How can I make a smaller video when it has limited unique frames?

I'm currently editing a podcast that is mainly audio with only three unique images shown on screen. However, using h264 encoding gives me a massive file, how can I leverage the limited number of ...
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Suitable alternative to Quicktime RLE for alpha-containing non-cartoon videos?

I'm producing a product that involves a composition of several videos, over alpha layers, and there are surprisingly few options aside from image lists. Quicktime's RLE (Run-Length Encoding) codec ...
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Optimized Parameters of `FFMPEG` for Screen Recording

Windows has a great codec for screen recording called Windows Media Video Screen. It generates artifacts free videos which are highly compressed (small size). I was wondering, what would be the ...
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Ffmpeg How to avoid audio sync when merging videos

I want to merge some videos from a list. Some of them have frozen frames, with silence filling. When I merge them the silence disappears, but the frozen frames are kept. Is there any way to add async=...
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How to open MP4 video with mp42 codec (hvcC) in Vegas Pro?

Apparently the video is with no content. Vegas pro detects the file but shows a black footage for 8 hours. Thanks in advance. General Complete name : C:\Docs\A09_20220424145630_007....
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H264 AVC codec Baseline@L3.1 vs High@L4.2

When I convert a video with ffmpeg, and use mediaInfo to review the metadata, I see the followings for the video codec: Format : AVC Format/Info : Advanced Video Codec Format profile : Baseline@L3.1 ...
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MOV file contains data from "Apple Elementary video MPEG-2 Media Handler" codec. How do I access it in current MacOS?

I am helping a director access an archive file of a documentary. The file is presented as a 3GB MOV. FFmpeg indicates the following: Metadata: major_brand : qt minor_version : ...
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HEVC vs H264 video file size

I am doing some experiments on the file size of recorded videos in HEVC vs the ones recorded in H264 using a simple Android app that I developed. My impression was that videos recorded in HEVC should ...
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Change video codec when capturing video in Android

I trying to write a simple app in Android that captures video and then sends it over the network. Looking at the recorded videos on my device, apparently it uses H264 AVC1 by default. I know my ...
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How can I find out which chroma subsampling (if any) is used in a video file?

If I have a video file, how can I find out which kind of chroma subsampling (4:2:2, 4:2:0), if any, that is used? What I've tried so far: If I open the codec info in VLC I can see that it's in the ...
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Transcoding from AVC to ProRes: Are there any negatives that would happen to the footage?

I've shot a short film and the files are using AVC codec within an .MP4 container. I'm wondering whether transcoding to say Quicktime (ProRes 422 HQ) would have any negatives that come with it. I ...
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ffmpeg video command still with black screen

I am using a screen capture component in delphi that I will use in my program, by enabling the recording option with the command ffmpegLGPL.exe -re -i% PIPE% -c: v h264 -threads 8 -profile: v baseline ...
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Increase video recording efficiency on smartphones

I am working on a smartphone app that records a video and uploads it to the cloud. Now I'm trying to find ways to increase the performance and quality of videos. Given sometimes the bandwidth of the ...
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Adapt video recording and playback according to the device

We have a prototype that records video and shares it to other devices to play. How can we customize the video recording and playback experience, considering mobile vs. desktop and the bandwidth ...
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ffmpeg and ffprobe existing library or an add-on, pros/cons of building one myself

I work with video creation, animation, or fix video elements for several broadcasters in my area. My pipeline includes ffmpeg suite of libraries, and I have written one plugin specifically for ffmpeg ...
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How do you batch resizes of Genesis videos in FFMPEG?

I am trying to a create 4:3 video upscale encodes with Sega Genesis videos that are usually around 320 x 224 using FFMPEG. While I had been advised to use FFMPEG (and AVISynth) in the past, it was ...
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ffmpeg to convert .avi to .mp4 results in error: Could not find tag for codec dvvideo in stream #0, codec not currently supported in container

I'm trying to convert .avi files to .mp4 using ffmpeg, as lossless-ly as possible. I tried this command: ffmpeg -i filename.avi -c:v copy -c:a copy -y filename.mp4 and received this output: ...
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Why is my video file so large when there isn't any video?

Background I am using Final Cut Pro X on a new M1 MacBook Pro (16gb of RAM) on AC power, and I have noticed that when I export the video project (share) the resulting video file is so much larger than ...
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Encode VP9 in mov container with pcm audio

Davinci Resolve's supported Codecs list shows it only supports decoding VP9 if placed in an mov container. Add to that the audio limitations also present on the Linux version and mov is somewhat ...
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What is the difference between lossless and lossy formats?

What exactly are the differences between lossless and lossy codecs? And is one better format better than the other or is it mostly relative?
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What is the difference between .mts and .mp4 video files?

I know that .mts video files use MPEG-4 video compression. But why then don't they just have the .mp4 file name extension? Since they don't, this means they are not digitally nor conceptually ...
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Moov atom not found on Raspberry Pi platform (Linux)

I have asked this question on innumerable sites but I haven’t been able to get an answer to solve my problem. The question Need help to fix a broken MP4 which lacks a MOOV atom Seems to be on point ...
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How to convert Fast Mpeg 4v2 (mp4v) with ffmpeg

I have problem with ffmpeg properly recognizing a video encoded with Microsoft Fast Mpeg 4v2 codec. Apparently it's a software codec. VLC plays the video fine. The codec reported by VLC is: Codec: ...
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Importing uncompressed video into Final Cut Pro without (too much) transcoding

I have recently digitized a VHS tape using VirtualDub. Here is the MediaInfo of the original file. General Complete name : capture.avi Format ...
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How can I put a VP9 video stream into a QuickTime/MOV container?

FFmpeg has no trouble putting all sorts of weird video codecs into QuickTime/MOV containers, including utvideo, hap, snow, ffv1, and cinepak. This makes sense, as it is my understanding that the MOV ...
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Streamable Container for gstreamer with ngnix / RTSP on jetson nano

Im working on this project : https://www.hackster.io/jonmendenhall/jetson-nano-search-and-rescue-ai-uav-9ca547 At  some point I will need to mount my camera (waveshare ; IMX219-77IR) on  top of the ...
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GIF/SVG kind of compression for Video

I am looking for a solution to compress screen recording. Imagine a coding tutorial involving mostly text and windows and almost no graphics other than icons and occasional view of the wallpaper. ...
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HTML5 video lags, but only for certain sections

For this HTML5 video, it runs fine without any playback issues except during a certain clip around the 3:15 mark: https://newtube.app/TonyHeller/X31Kd6s I'm just a simple code monkey and don't know ...
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Can I use ffmpeg to encode a video for Camtasia import?

I'm using ffmpeg to create screencasts. The command looks like this: ffmpeg -f x11grab -framerate 30 \ $(xwininfo | gawk 'match($0, /-geometry ([0-9]+x[0-9]+).([0-9]+).([0-9]+)/, a)\ { ...
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ffmpeg: Unknown decoder 'copy' when concatenating clips

Basically I was following https://video.stackexchange.com/a/15701/26767, which states: This should work faster... ffmpeg -ss 1:00 -t 5 -i in.mkv -ss 2:00 -t 5 -i in.mkv \ -filter_complex "[0][1]...
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How can I find out the codec of a video I have exported from Premiere Pro?

I've exported some videos from Premiere Pro after working on them, but I've forgotten what the codec of the video is. How can I find out the codec of the video? Thanks!
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Hello ffmpeg heroes - please help me with ffmpeg/ffprobe commands to decode a video for me?

I have a sample.mp4 which is currently not playable on VLC or media player and I've checked the FFmpeg values and get the below result? Any help would be greatly appreciated.
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2 votes
1 answer
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Widely compatible video format with lossless audio

I'm a software developer. My software produces animated video files with music. The video files should be compatible with a wide range of software, and they should have excellent audio quality. The ...
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Decrease video size post-editing

I am using a video editing software to edit my videos for YouTube. The scenario is as below: Input file size: 80mb. Input type: webm. My expectation after editing : Video size: around 100mb. (Any ...
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Create 4x2 grid mosaic

trying to create a 4x2 grid from 8 videos using the terminal on a mac. The code I am using is not working: ffmpeg -i input0.mov -i input1.mov -i input2.mov -i input3.mov -i input4.mov -i input5.mov -i ...
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Why does audio not work for this mp4 when played on IPad with headphones plugged?

I'm hosting this video : https://itype.techforge.com.au/assets/videos/repeated/WordRat.mp4. It seems to work fine unless you happen to be on an IPad and plug the headphones in. With the headphones ...
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Valid Slideshow-Video created by ffmpeg is not accepted by Twitter

I create a video from a slideshow using ffmpeg. I have a valid video at the end. VLC plays that video, YouTube also. I want to display the final product directly on twitter. I checked the recommened ...
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Artifact in animation / horizontal lines & double images

I'm using Handbrake, with the H.264 Codec (RF:16). It works pretty well with live action, but it produces odd results whenever I try to back up/encode animations. I've attached a screenshot: Anything ...
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Merge multiple video files using ffmpeg by adding multiple compress options

I would like to merge multiple video files, performing in the same time complex compressing options. How can I do that? The following ffmpeg command resulting this error: Filtergraph 'scale=1280:...
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How do I get Windows Media Player and other tools that depend on system codecs to play this video file?

I have a video file that plays fine in VLC, but only shows 100% black frames in Windows Media Player, and in other applications that depend on system codecs (for example in MATLAB, which is where I ...
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Save video with the exact quality of the source file

I have never had success in saving file with same quality after editing. Either it was much bigger, or quality was worse (square blocks etc). I thought MediaInfo program would help, i used to check ...
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FFMPEG -C:V Copy and -C:V Transcode

When I do it like this, -c:v copy -preset ultrafast -cfr 20 -tune zerolatency and it doesn't work I know that this is excpected because the video codec is copied and all the other parameters such as ...
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FFmpeg convert G.711 Audio to AAC Audio

Is it possible at all to convert G.711 audio to AAC audio in a stream using ffmpeg? My cam is streaming fine in Chrome (video + audio) but all the other browsers have no audio. I would appreciate any ...
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Best render settings for youtube

I am using Vegas Pro as an editing tool for my videos. What codec (currently using x264vfw) and settings are best to render 1080p 60fps video for YouTube if I don't care about either rendering time or ...
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1 vote
1 answer
390 views

Network Stream reloading in a loop (Nginx/RTMP Streaming Server)

As the generic title suggests, I do not know exactly how to explain my problem, neither do I know what could cause it. Hopefully this ends up to be the right place looking for help, as I do not find ...
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Where to get codecs?

I have a two part codec question. I want upload a 100 min video to YouTube. Export size from Premiere Pro is 22GB on disk. Here are the only Codecs I have installed: I'm new to this, and was advised ...
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2 answers
1k views

How to make video play with correct aspect ratio

I have the following issue: I have a video file (h264) that plays with the correct aspect ratio in mplayer. However, if I load it into Intel's Computer Vision Annotation Tool, or if I re-encode the ...
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Best video format for a retired PowerPC (iBook G4)?

We have a retired iBook G4, it plays H.264 quite laggy. My question is what is the best video format optimizing for Battery Life on a PowerPC? Bonus question: Is there a free batch converter for ...
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