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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Handbrake Output Visually Freezes on Interstitial
I downloaded an m3u8 stream using a Chrome plugin, and it created an mp4 file which I can play fully in VLC.
Next, I am attempting to use Handbrake to encode this file to be played on an old iPod Nano....
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compare two video then cut the different
I have 2 video files with the same content, but coming from a different source. They have a slight difference in 'cut' and language dubbing, meaning one can be missing a shot compared to the other.
I ...
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Issues with transcoding to a MXF container
I'm new here, so hi to all :).
I'm new to FFmpeg too, and I'm trying to transcode a HEVC file to a mxf file and I'm having some issues. The original file is a rip I made from a Bluray HDR movie a ...
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FFmpeg recover_mp4 help
ive been using ffmpeg and recover mp4 to try and restore a dashcam video from a car accident. im a beginner using this method/ software and im running into this issue. not sure how to "increase ...
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ffmpeg - Slow down video and loop/repeat audio
I am trying to use ffmpeg to slow down a video speed by 25% (75% speed) without changing the audio speed.
ffmpeg -i input_video.mkv -filter:v "setpts=1.3*PTS" "SlowVideo25.mp4"
On ...
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Why is my rendered video output larger than imported files?
I have imported multiple video files (roughly 3h30min / roughly 11GB). I have stripped out the Audio and reduced my total cuts to roughly 2m12sec. I have tried multiple render video output formats, ...
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FFprobe not showing frames data
As a beginner I don't know much about ffprobe and other video editing command line tools. Please guide me here.
I am trying to download a video with yt-dlp and trim it to the nearest key-frame of my ...
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How can I change/reduce the bitrate of AVI files using Adobe Premiere Pro CC or other tools?
I'm using Eprime and Experiment Builder which requires files in AVI format (AVI-XVid). The files are quite small already (various 2 second clips under 1mb), but are still too large which crash the ...
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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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FFmpeg for m2t and Sony Bravia - not working
-f mp4 -c:v libx264 -preset veryslow -tune grain -profile:v high422 -flags +ildct+ilme
I am preparing video to be streamed (DLNA) from my NAS to an older Sony Bravia. I have successfully created ...
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How to fix the difference between duration of ffmpeg input and output?
I am trying to generate a video from a bunch of png images and audio using the command:
/usr/bin/ffmpeg -y -framerate 30 -pattern_type glob -i 'images/*.png' -i audio.wav -c:v libx264 -b:v 0 -crf 18 -...
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How to delete the very last frame of a video using ffmpeg / mencoder / transcode or any other?
I am trying to delete the very last frame of a video using ffmpeg / mencoder / transcode / or any other free linux application.
Here is what I have so far, and it's only extracting it, it's not ...
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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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What x264 encoder is better for upscaling pixel art? Is it x264 8bit or 10bit?
I mostly use Virtualdub2 to upscale my videos (although I am looking for other methods) via two resize filters, Nearest Neighbor and Lanzcos3. Recently I am looking at the x264 encoder to encode my ...
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Do modern devices support decoding 4:4:4 pixel formats?
I am recording and distributing relatively low motion screen content (not games). Using h264, fine text often appears very blurry due to the poor subsampling with 4:2:0 and 4:2:2 pixel formats. With 4:...
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best way to publish low latency video on ffmpeg
I am trying to publish a stream of live video that need to get to the client side in under 3 sec in latency.
I am using vMix to capture a 720p/50 stream from a camera, that by virtual camera letting ...
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ffmpeg max resolution surpassed
I'm creating a sprite sheet for my website which will be used as an animated background mask on a button hover. The only issue I'm having is creating the sprite sheet mask
I have 297 720p images I ...
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ffmpeg showing "Thread message queue blocking" error while encoding (non real time)
Hope someone can help me. I'm using ffmpeg to extract the frames from an old video as images, batch enhancing and upscaling the images, then renecoding the images together with the original audio to a ...
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Free software for batch basic editing and down-sampling
I have a bunch of TV shows in HD that I want to down-sample to SD and at the same time strip out the titles and credits.
Handbrake has great encoding and can handle batches, but I can't find a way to ...
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How to generate decryption key from m3u8 manifest? (OR) How to decrypt an excrypted MP4 using URI and IV?
I am downloading an HLS video which is AES-128 encrypted. The issue is that the downloaded video is also encrypted and hence, not viewable.
The website is serving 2 M3U8 manifests:
The first ...
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Adobe Media Encoder (Why is it not using all the available power)
System Spec:
16 core 3950x
Nvidia rtx 3080
64gb of ram
1tb nvme
2tb ssd
4tb hdd
Software
AfterEffects - v17.5.1 (build 47)
MediaEncoder - v14.7 (build 17)
Problem:
So I'm outputting a fairly complex ...
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How to fix Encoding Overloaded in OBS Studio?
I want to record a programming tutorial with OBS Studio in 1080p 30FPS. I have never changed the encoder, the output format is MP4. Although my computer has very good hardware, I get Encoding ...
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Which rate control algorithm best preserves quick movement?
I gathered the following rate control algorithms are commonly used when encoding modern video formats like h264, HEVC or VP9.
With a constant quantizer (-qp in terms of ffmpeg) all frames are encoded ...
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How to get ffmpeg/x264 to use same parameters as input?
I'm trying to accomplish a smart rendering workflow using ffmpeg/x264. In short, get ffmpeg to segment the input file. Locate the segment(s) with changes to be made. Re-encode altered segments with ...
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Encode still image video effectively in FFMPEG
FFMPEG can make video from MP3 file and still image:
ffmpeg.exe -loop 1 -i "img.png" -i "%1" -c:v libx264 -tune stillimage -shortest "%1.mp4"
But it honestly encodes the ...
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Suitable codec and settings to encode videos that can be scrubbed back and forth for making transcripts
For scientific purpose, I'm encoding videos that are going to be transcripted. Since in the process of transcription the person who does the transcription needs constantly to jump back and forth in ...
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Largest input image size when encoding a video?
I got a bunch of really large 16 bit videos, approaching 65535×65535 pixels in size. These are essentially high quality timelapse panoramas. I want to convert them to a 7680×4320 movie (8K UHD, 8 bit)....
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Encoding to the same H.264 size as YouTube
I am unable to re-encode an H.264 video that I downloaded from Youtube back to its original size. The MediaInfo is pasted below. The size of the video stream is 20 MB.
I decoded the video into raw YUV ...
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FFMPEG 9600x1080 5 video
FFMPEG 9600x1080 5 video stitching outputs black video
Hello everyone. I’m trying to merge 5 1920x1080 videos into a one big 9600x1080 clip. I’m using FFMPEG for it with the following script:
ffmpeg -...
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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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Can you fix videos with "error: more than 5 seconds of late video" without re-encoding with ffmpeg?
I have obtained a video, ffprobe for it shows:
$ ffprobe test-000000.mp4
ffprobe version 4.2.7-0ubuntu0.1 Copyright (c) 2007-2022 the FFmpeg developers
...
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '...
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How output multiple stats file for multiple output?
I'm launching encoding ffmpeg using GPU with 2 outputs: one using H264_NVENC and one using HEVC_ENV.
To enable video stats output I'm putting -vstats before input file. To specify output of video ...
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How to re-encode leaving only every Nth frame in?
I have several hours of CCTV footage that I'd like to reasonably quickly skim. If there was a way to take every say 60th frame from it and put together a video from those frames that would be perfect.
...
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Why, in FFmpeg with libx265 the timestamp tbn parameter is always 1k even when it seems not logical?
I encode with ffmpeg and noticed that when I encode a y4m video in 29,97 FPS into a h265 video with libx265, the parameter of the two videos are the following :
original y4m :
29.97 fps, tbc : 29.97 ...
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Understanding YouTube Video Color
When I upload a video to YouTube, the white areas become grey and the colors seem a bit washed out.
This is how it looks locally:
And this is how it looks on YouTube (Screenshot from Firefox):
This ...
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How to know which ffmpeg encoders are hardware accelerated?
On any given build of ffmpeg, ffmpeg -encoders will list which encoders can be used for encoding video.
Of the encoders listed, how can I tell which ones use hardware acceleration?
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Recommended Encoding for VHS to Digital to be Followed by Post Processing
I have VHS tapes that I want to digitize. I started this using something like Pinnacle's Dazzle. I notice that the only encoding options were for compressed video, which could lead to quality ...
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Recording dozens of videostreams simultaneously - software & hardware stack advice required
I have a task to record multiple web-based (HLS) streams simultaneously; we're talking about ~20 streams with possible scaling to ~50 in the future. Each stream comes as an individual link, 1080p, no ...
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Re-encoding Lossy formats with Lossless formats
I was re-encoding videos downloaded from YouTube with Lossless H.264 (using FFmpeg) because I'm experimenting with CRF=0.
I found that resulting videos are much bigger (1 gigabyte) than the original ...
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ffmpeg demuxer file size
I have used ffmpeg to concatenate two MKV containers with both files having AV1 codec like so:
ffmpeg -f concat -i input.txt -c copy "out.mkv"
Interestingly enough, the first file has ...
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How to convert an mkv file with hevc encoding to mkv with avc
I have some mkv files with a hevc encoding which is not allowing me to burn to disc in covertxtodvd as it shows no video track as the encoding isn't supported, i was wondering if it was possible to ...
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How to mux JPEG into TIFF?
I understand that I can decode and then re-encode JPEG to TIFF using:
ffmpeg -i input.jpeg -pix_fmt rgba output.tiff
But instead I want to do lossless muxing from JPEG into a TIFF container/format. ...
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Different decode performance in two similar H.264 videos
I have two, at first glance very similar mp4 files (A & B), each of them created by different capture software.
File
Captured using
codec
resolution
fps
bitrate
A.mp4
Elgato 4K Capture Utility
h....
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How to encode for YouTube with ffmpeg?
I just read Recommended upload encoding settings article from official google support. I think this is the best settings for encoding my youtube videos.
Can you help me find out how to encode that ...
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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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RTMP VS NDI-HX with now WIFI6
I'm trying to make a decision which all boils down to this. When it comes to streaming wirelessly (over WIFI) in a local network to a streaming PC/server, is it better to use NDI-HX or RTMP. Most ...
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What causes, and how to avoid artifacts on uncompressed video?
Wondering what in particular could be causing visual artifacts on uncompressed video and how to avoid it. I am assuming it is due to the encoding, but would need confirmation as I'm not an expert on ...
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Issues in trimming a video with FFmpeg
I have a .webm video captured through a web browser. Using ffmpeg, I want to trim it into its first 30s without re-encoding and quality degradation. But I have issues doing it and ffmpeg complains ...
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FFmpeg saturates memory + CPU usage drops to 0% during very basic conversion of PNG files to MP4 video
I have this Python function that runs ffmpeg with minimal options from the Windows command line:
def run_ffmpeg(frames_path, ffmpeg_path=notebook_directory):
'''
This function runs ffmpeg.exe ...
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What is the correct MPEG-2 FourCC?
In my attempts to encode a video to MPEG-2 in an MOV (which seems to be a valid combination, at least according to Wikipedia), using ffmpeg (-vcodec mpeg2video) and other tools, I have become ...
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