Questions tagged [codec]

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

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8 views

Alternative to XVID?

What codecs are good for upscale encoding while saving space and preserving the quality of the video? I am looking for something that is good with animation, gaming, 2D, etc.
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902 views

Format and codec for a video with 5760×1080

For an art installation I need to project on 3 projectors (1920×1080). My playback setup is: 1 PC with Windows 7, SSD, NVIDIA GeForce GTX 980 and 3 projectors (1920×1080). The video I need to ...
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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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Deduplicating video codec

Say I have a 10 second video that I want to loop 1000 times (not just loop-play it in its presentation form, but have the actual video file be 10000 seconds long). This video will contain the same ...
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1answer
172 views

Intermediate Codec for Resolve to Adobe Mediaencoder or Premiere Pro

I am editing in Resolve, sometimes I am also just Color Grading in Resolve, so I need an intermediate Codec between Resolve and Adobe Media Encoder or Premiere Pro. The size doesn't matter as much, as ...
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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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1answer
170 views

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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562 views

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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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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5k views

Streamable Container for HEVC (H.265)

flv is a container which can be used to stream videos while they are being encoded. flv supports h.264 codec. However, flv doesn't support hevc codec. Is there any container for hevc which is ...
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248 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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1answer
381 views

AVI Capture in VirtualDub: MP3 Compression

I would like to capture my old VHS tapes to my HDD. I already was successful installing the xvid codec which gives me an acceptable video compression. But somehow I am not able to set audio ...
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58 views

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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Triming ogg files to an exact number of samples

Let me begin by saying that I'm not sure on which site on the Stack Exchange network I should post this, as the central theme is essentially codec internals. Background I would like to be able to ...
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1answer
198 views

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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Frame rate (FPS) multiplied by duration (sec) isn't equal to total frames

On a YouTube video stats, apparently, the frame rate is 30 fps: Total video length is 1:32 i.e. 92 sec. Total frames = frame rate x time Total frames = 30 x 92 = 2760 So why are frames reported as ...
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Efficient (small size) lossless encoding of video where just few localised pixels changes every so often

I want to record efficiently (space-wise) a screen area which has certain charateristics, akin to a video presentation of a software : it is a window on my computer where a program runs. Not a video, ...
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1answer
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Convert a non-supported/obscure codec to a supported codec

I currently work with a team of researchers and we are obtaining data from videos that are encoded with SMB8, they are AVI files. We couldn't find anything on the SMB8 codec online unfortunately. We ...
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Convert to ProRes with ffmpeg adds unwanted contrast to footage

I'm trying to convert H.264 footage from a Panasonic EVA1 camera to Apple ProRes with ffmpeg. However no matter which setting I use, the output file has slightly more contrast than the original input ...
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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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I changed the .mp4 extension of my video to .mpg and it still opens and plays fine (in VLC and in Windows Media Player). Why is this so?

I'm uploading a file to an external system that accepts only mpg or mpeg extension files. I had a mp4 file so I changed the mp4 extension to mpg and I was able to upload the file into the system. ...
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1answer
554 views

FFMPEG - MAC OS Cannot Capture from Black Magic UltraStudio (Thunderbolt)

I have Black magic UltraStudio Express that captures SDI or HDMI and Connected to MacBook via Thunderbolt when I list devices I get the Audio but not the video : $ ffmpeg -f avfoundation -...
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16k views

how to get vdpau hardware acceleration using ffmpeg?

I am developing a multimedia player using ffmpeg. I am trying hard to get hardware acceleration through ffmpeg using vdpau hardware accelerator. I didn't get any success so far. Below I have mentioned ...
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How I can play an Amazon Prime Video movie with Dolby Digital Plus audio using Chrome browser in my PC?

Currently my web browser Chrome (last version 80) cannot play Dolby Digital Plus audio. I know this audio is used in other devices like Apple TV, Roku, or Amazon Fire TV for example. According to ...
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How to decode a 2D video with H264 by FFPMEG?

For one of my projects (https://www.cs.tau.ac.il/~amir1/PS/3d.pdf) I need to use FFMPEG, but I am entirely new to C++ so diving into it will take a lot of time. Is there any code/handy resource ...
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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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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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recording uncompressed or > 150000 kb/S video on a smartphone or tablet

Is it possible to record uncompressed or > 150000 kb/S video on a smartphone or tablet? If so, how and what devices are compatible? I am able to do this with cheap logitech webcams, however the ...
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“True” monochromatic/greyscale video format

Sometimes referred to as "RAW" format, an example of which would be the now outdated CinemaDNG - a format that stores pixels in their pre-demosaiced form, as pure light intensity values as ...
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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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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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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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12 views

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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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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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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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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33k views

How to encode Apple ProRes on Windows or Linux?

Is it also possible to encode video with Apple ProRes on Windows and Linux?
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1answer
4k views

ffmpeg convert mp4 to mov with dnxhd codec

I'd like to convert an mp4 file to DNxHD for use with DaVinci Resolve. Here is my attempt of doing the conversion using ffmpeg: C:\FFMPEG\bin\ffmpeg.exe -i "H:\Downloads\test.mp4" -vcodec dnxhd "...
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131 views

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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How does YouTube encode my uploads and what codec should I use to upload?

Related to What codecs/formats are appropriate for full motion video recording for youtube? I'm wondering exactly how I can expect Youtube to handle my videos. I know they have a rather zealous ...
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FFmpeg :How to convert to XDCAM HD-422 correctly? (or how to force frame order to BBIBBPBBPBBPBBI like XDCAM HD-422 )

I exported some XDCAM HD-MXF files with Adobe Premiere and Edius,both exported files are the same, I was surprised to see the order of their frames because they are like this : BBIBBPBBPBBPBBI... But ...
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1answer
35 views

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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HVEC codec with a .mov extension

Specs for a job I'm working on is HVEC codec with a .mov extension. Media encoder only gives me the option to export HVEC as a .mp4. How do I export or convert to a HVEC with a .mov extension?
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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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1answer
32 views

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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77 views

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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54 views

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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2answers
836 views

Video codec for simple animation?

I am generating an animation in Matlab, composed of simple diagrams. The images are characterized by fine structures, strong contrasts and mostly discrete colors, e.g. there are few-pixels wide black ...
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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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