Questions tagged [encoding]

The process and techniques used when storing moving images, sound, metadata and other streams as a digital file.

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251 views

Workflow for trimming, encoding, and publishing videos to the web

Basically, companies will be giving us access to a variety of videos in a variety of formats. We will then download the videos, trim out the important part in a 5 min and/or 10 min chunk. From there,...
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3k views

MP4 video rendering differently on different browsers and different machines

I have asked a similar question before, but we are still having the same issues. Background color of MP4 rendering incorrectly in QuickTime I am trying to encode MP4's for playback on a website. I ...
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How could an 8-bit encoding take more memory than a 10-bit encoding?

I'll start off by saying that I know next to nothing about video encoding and I'm looking for a nice tutorial explaining the basics (I have a technical background and some knowledge of signal ...
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20 views

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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120 views

Resolution loss by chromatic subsampling: is there a workaround?

I was trying to make some recordings of a game (with OBS), but it wasn't really good even with "lossless" options. Some part of the interface was just pixelated... After a while I realized ...
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528 views

FFmpeg/nvenc(cuda): Where is the documentation for h264_nvenc encoder?

I'm trying to use Nvidia's h264_nvenc video encoder with ffmpeg but I can't find a single source of documentation for it. I want to know what options are supported and what they do. The software ...
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307 views

Best export settings for still image with audio

Suppose I have a sequence in Premiere which is an audio track accompanied by a single still non-moving image (e.g. a song and the album art). Being that there is no video (or motion of any kind), what ...
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303 views

severe artifacts pixelation when using cuda rendering premiere pro

In premiere pro when I set the renderer to GPU Acceleration (CUDA), for the timeline and on media encoder export, half the video is completely messed up with lots of pixelation artifacts when I switch ...
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2k views

ffmpeg rtmp server connection issues

I am trying to stream using ffmpeg rtmp using, ffmpeg -i out2.mp4 -c:v copy -c:a aac -listen 1 -ar 44100 -ab 64000 -f flv rtmp://localhost/live The process starts but nothing is happening after ...
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86 views

x264 Downsides of a high CRF (22) intermediary codec between conversions instead of lossless

I have a huge collection of video files that are in the range of CRF 16-20 taking up TB's of space. The only need I have for these originals is that I have to encode them from time to time but the CRF ...
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2answers
874 views

Is using codecs matter if Facebook re-encode all the uploaded videos?

I usually encode with libx265 and libfdk_aac to get good quality and small file size for posting in Facebook. I use ffmpeg as follows. ffmpeg -i input.mp4 -vf -c:v libx265 -c:a libfdk_aac output.mp4 ...
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407 views

How to split video in small clip?

I'm trying to split a video (50-100Mo) into several small clips of a few seconds each. I don't need re-encoding, hence my use of codec copy. However some of the resulting clips don't have any video. ...
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241 views

Problem setting different framerates with FFmpeg map option

I am facing a problem to set video streams framerates with FFmpeg when using the map option. Here is what I want to do: Given an input video file of 60 fps, I want to generate an output file ...
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4k views

How do I avoid objects having flickering edges when I encode a screen recording to mp4 using x264 and ffmpeg?

The Goal I'm creating short tutorials by recording my screen (720p30fps). The content is just a recording of using some desktop software - so mouse moving and opening dialogs, typing, drawing shapes, ...
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244 views

Encoding low bitrate video source file to a higher bitrate

I need to know if there will be any difference in the quality of the encoded video if the bitrate of the source file is, let's say 2000kbps and I encode it to 4000kbps. Any help will be much ...
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860 views

libx265 NUMA pool configuration misleading

I have the following scenario: Using libx265 and a dual-socket system (thus 2 NUMA nodes) I want to encode videos using ffmpeg and libx265. libx265 can be configured to use thread-pools which are ...
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897 views

How to tune ffmpeg libx265 parameters for encoding old sprite based game video?

I'm using ffmpeg libx265 to encode some fun gameplay clips from old games. Typically this means low resolution pixel art, with small sprites moving against a static or scrolling background. The ...
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Suggestions/Ideas for a "Show Me" project for school about Audio or Video Encoding?

Basically, I need to make a quick "Show Me Something Cool" project for my physics class. It could be about anything sciency, that is cool, and that you can explain & demonstrate in class in like 5 ...
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1k views

How to prevent chromatic aberration (green/purple fringing) on an After Effects export?

I'm relatively new to After Effects. I'm building a short ad using a free template I downloaded. I then rendered the project using Adobe Media Encoder on the H.264 Youtube 1080p setting. ...
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2answers
3k views

What are the best codecs and encoding options for a image sequence video?

I am trying to make a video out of an image sequence - Where each frame lasts for a second. The image sequence contains the same object shot from different distances. I'm guessing most default ...
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1answer
879 views

FFmpeg, encode video for 720p @ 4mbps playback

I've been fighting with this dilemma for about a week or two now and I've tried my best to understand it from whatever I can find through google. What I need (or at least I think I need) to do is ...
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628 views

How to stop Sony AVC/MVC encoder from adding 4:3 aspect ratio to 16:9 videos?

I am using Movie Studio Platinum 13 (essentially, light version of Sony Vegas). I am creating a project based on mp4 files recorded on my Sony Alpha camera. These files have pixel resolution ...
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573 views

Which filter and what parameters should I use to deinterlace this video?

I want to use a small part of this video: . It has very bad interlacing that I need to get rid of. I downloaded the mp4 file, which is 1920x1080, 29.971 fps. I don't ...
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532 views

What's the encoding difference impeding playback on iOS?

A video used on a website doesn't want to play on iOS devices. The video was encoded by another person using Sony Vegas, with settings similar to what I used before (although I used Adobe Premiere). ...
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1answer
1k views

How to create MPEG-DASH variants at resolutions where one dimension is not a whole number in pixels?

I've created a bunch of variants and a DASH manifest for Sintel, which more or less works, but does not pass validation. The issue is when I want to scale a video to a specific width, but the height ...
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1k views

Quicktime rendering issue

I am trying to export my composition from AE CC but when I hit 'Render' nothing happens. In status is says 'Rendering' but this is not the case and the cursor looks like it's working but nothing is ...
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1answer
4k views

What are supported stream formats for h.265

I wanted to know what are the possible streaming formats for streaming a video using H.265. Does H.265 support rtsp and rtmp based streaming? Currently, I am using ffmpeg to live stream the camera ...
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1answer
2k views

How to prevent lossy re-encode of low-bitrate videos uploaded to YouTube

I have a huge number of low-res Flash videos (480x270, 30 fps, 800 Kbps) and I want to resample all those videos in 1280x720 with some added spatial sharpening and lomo filters to make them look nicer....
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199 views

Best format to export to in blender

I am using blender video sequence editor feature. When I export my video I have subtle quality loss. There are mild flickering artifacts. I have a couple question related to that. First one, is what ...
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74 views

Exporting to multiple formats

these days we usually have to export our videos to multiple delivery formats - HD variants for projection, and we tend to have different settings for vimeo, youtube, and the other versions we might ...
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3answers
1k views

What setup do I need to record and render at the same time?

I need help figuring out how to record while my computer is rendering. I am very new to video editing, so this is my current workflow. First, I record footage using Fraps (30 fps, 1080p, .avi). I ...
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2k views

Saving disk space, but not quality

I'm pretty new at this... I captured my analog 8mm video tapes in .avi, planning to edit them with Premier. But I need to make space in my external hard drive. I have the Adobe Encoder, but I'm ...
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755 views

Letterbox when converting 4k to 1080p

Got handed a pile of stock footage downloaded from various sites. And found one clip is 4k ( 4096x2160) I put it into AME to reexport it as DNx115 but when I set it to 1920x1080 23.976 I see ...
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374 views

What parameters should I select to get a high quality voice .wav file?

I'm trying to generate a high quality .wav voice-over using Microsoft Speech API. What should be the values of following parameters (they are part of this constructor): int samplesPerSecond, int ...
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596 views

What needs to happen before we expect x265 to be in wide use, along with encoders something like Handbrake available for it?

I know that the project is already out and work has began on it. However, realistically speaking, a large number of things have to happen before it is ready for prime time. (For example, given the ...
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95 views

Why does audio have standard bit rates whereas video does not

I got into live streaming recently and while I was reading up on encoding settings I noticed that even though there are rules of thumb, there doesn't seem to be a standard set of bit rates we could ...
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290 views

Codec/Hardware Advice on real-time encoding multiple HD streams

Does anyone know of what kind of hardware along with any good codecs that could reasonably encode 3 x 1920x1200 60fps DirectShow streams in real time? Preferably a lossless codec but I know at these ...
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767 views

How to ignore file name extensions while replacing source files for online editing in Premiere?

I'm encoding all my source files for offline editing with Premiere Media Encoder. I have MP4 and MTS files, and I thought of converting them all to AVI DV-PAL. Problem is I guess I'll have some ...
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1answer
3k views

Configure file naming & presents in Adobe Media Encoder

I'm running the latest version of Premiere Pro & Encoder (CS6). Encoder has a watch folder capability to automatically encode files, but it defaults to Flash output with a specific preset & ...
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Are video encoders specialized for certain resolutions?

I have wondered if the encoders used by tools like ffpmeg and hardware encoders like NVENC are more efficient for common resolutions like 1920x1080. I've done a few informal tests with a variety of ...
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10 views

Low latency on SRT stream

I am new to this and wondering, how can I get the lowest latency sending an SRT stream? I can’t seem to get under six seconds. Using, latency=10000
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129 views

Extract subtitles in time range using ffmpeg

I have original video (with subs) and cropped version of it (without subs). I need to add subtitles from original video into cropped in appropriate time range. I think the best way to do is: Extract ...
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Why does a h264 encoded video recorded with HTML MediaRecorder on an Intel macbook not play on an m1 macbook with hardware acceleration enabled? [closed]

I've reproduced this issue in a simple sandbox: https://codesandbox.io/s/practical-driscoll-veyc2 (you'll have to open https://veyc2.csb.app/ in a new tab to have the screen recording functionality to ...
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101 views

Build FFmpeg with ".EXE" files of external libraries?

this is my first question on StackExchange! I recently got into building FFmpeg on Windows and build successfully the vanilla and the external library versions of this program! I noticed that it only ...
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Is there a hardware acceleration for audio encoding?

Video encoding with HW acceleration takes way less time than audio encoding. Is there a way to convert ac3 to aac faster?
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What is video hinting?

I've just faced with such thing as hinting videos. Quick research showed me something about the fact that it makes "streaming better" and something about QuickTime Streaming Server. That wasn't really ...
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2answers
1k views

FFMPEG: is it possible to offset output frames from a selection of specific frames?

I'm doing some ffmpeg (4.1.3) transcodings by extracting specific frames from the source, in this case, the source can be either a movie or an image sequence, all working fine with the following ...
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56 views

Is there any "concatenable" video format I can use for sequential streaming?

I'm writing a server and I have to play commercials on demand, so I'm trying to avoid re encoding video. I assume that video containers have headers and meta data, so it would not be possible. Is ...
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184 views

Adobe Encoder Desyncs Video/Audio (MTS to MP4)

I've been trying to transcode an MTS (recorded on a Panasonic) to MP4 with Adobe Media Encoder. The audio/video has consistently gone out of sync. I've matched the source, gone over all the settings, ...
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607 views

Prores ffmpeg questions

I am trying to understand how to use Prores Kostya with FFmpeg, and I have a few questions regarding this: I have a Panasonic G85 and Gopro Hero 7 black which I used to shoot 4k in. For 4k footage, ...

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