Questions tagged [transcode]

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Does Intel Quick Sync capability differ between i3 and i7 CPUs?

I am building a NAS and I want to narrow down my CPU and GPU requirements. Does Quick Sync capability between i3 and i7 Quick Sync-capable CPUs differ in any way, or do both lines carry the same Quick ...
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Ffmpeg: Is it possible to use -itsoffset option without transcoding for live RTMP streams?

I am using -itsoffset option for delaying the video track of a live RTMP stream by few seconds but the problem is that I must use -c:v libx264 or other codecs, I cannot use -c:v copy, I want to use ...
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What is the suitable H/W compatibility for av-1 encoding

Some videos are transcoded, h264 on ARM machine, h265 on Intel Skylake and av-1 on Intel RocketLake. File savings are better with av1 at the same quality but still at a high computational cost. Avg ...
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Transcoding h265(3840x2160, 25fps) into h264(1280x720, 5fps) and h264(3840x2160, 25fps). RTSP in and RTSP out using qsv

So hardware: E-2224G - Intel® UHD Graphics P630 Reolink 820A 4k PoE security camera So I've setup a dockerfile to get rtsp server and all the right ffmpeg tools with intel drivers: FROM aler9/rtsp-...
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FFmpeg transcode piped mp4 with MOOV at end - but I can read it twice

I need to transcoding an MP4 file using that I can only access via a stream. The MOOV atom is at the end of the file. I do not have the ability to seek to a specific part of the file, only read a pipe ...
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Internal working of vmafmotion filter

The objective was to check how dynamic a given video is and based on that we tweak the bitrate of the video with an internal algorithm, keeping the quality minimally changed and saving the space. For ...
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Jellyfin on Debian 10 not loading videos, but it can load songs

I can start by showing a list of the files I have stored under the "movies" directory for jellyfin. I don't have much of them, just some to do testing: total 2677800 drwxr-xrwx 2 sisyphus ...
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2 votes
2 answers
1k views

Parallel transcoding with FFmpeg on M1 Mac

I'm trying to determine how effective an M1 Mac would be for transcoding video using FFmpeg (specifically resizing and adjusting bitrate). I can do single transcodes using a command like this: ffmpeg -...
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how to convert a given video file to all possible codec/container format combinations

I posted the same question in Video Production StackExchange site 8 days and there is not even a single answer to that up till now. So now I decided to try my luck here in Superuser site. My semi-...
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FFMPEG - audio crackling when merging wav files [duplicate]

i'm merging two audio files into 1 with a acrossfade filter. Here is my acrossfade filter config: acrossfade=d=10:o=1:curve1=cbr:curve2=cbr; The merge is working well for .mp3 files, but when one(or ...
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FFMPEG - Merging .wav files with acrossfade and getting audio crackling

i'm merging two audio files into 1 with a acrossfade filter. Here is my acrossfade filter config: acrossfade=d=10:o=1:curve1=cbr:curve2=cbr; The merge is working well, but for some files it results in ...
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Issue transcode MPEG2 to DNxHD120

I use the software Kdenlive in Archlinux OS to transcode a 1 hour of video (1:12 :10) in Mpeg2 format in 1440x1080px 50i to DNxHD120 1920x1080 25p. Kdenlive print those parameters in the transcode's ...
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ffmpeg libx264 is noisy

After converting video with ffmpeg to H264, my video is noisy. ffmpeg -i http://192.168.1.10:5530/bysid/106 -map 0:v:0 -map 0:a:0 -c:v libx264 -c:a mp2 out.mkv Normal: Noisy subtitle: Same result ...
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When transcoding DVD contents, should I keep the 29.97 framerate?

I'm using handbrake to transcode (the main stream of) a DVD into a x265+AAC file, using the handbrake application. The source material has a frame rate of 29.97 fps. My question: When transcoding, ...
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FFMPEG - Transcoding webm to mp4 - wrong duration

I have a webm file that I want to convert to a mp4 file. The result is a mp4 file with a different duration than the webm (much longer). Webm file (via WeTransfer, example.webm, 421kb) About the ...
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Thumbnail disappears when transcoding AVI to MP4 with ffmpeg

When I try to convert an very old avi to a mp4 with ffmpeg, the thumbnail disappears. Is there a way to preserve the thumbnail or auto-generate one directly from the video stream, for example, using ...
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How to have Windows 7 store its desktop wallpaper file TranscodedWallpaper.jpg on a RAM disk (RAM drive)?

Windows 7 (and later versions, to my knowledge) stores the current desktop's wallpaper as a transcoded image file named TranscodedWallpaper.jpg. In Windows 7, the location of this file isX:\Users\<...
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4 votes
2 answers
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Is FDK-AAC still better than FFmpeg's native AAC encoder?

I wrote this about a year ago while working through my own way trying to compile a FFmpeg for Windows, based on the premise in the FFmpeg wiki that: The Fraunhofer FDK AAC codec library. This is ...
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Is there way to increase speed of adding subtitles to a WEBM video?

With MP4 I used this command ffmpeg -i INPUT.mp4 -vf ass=SUBS.ass -c:v libx264 -preset ultrafast -crf 22 -c:a copy OUTPUT.mp4 which has helped to increase the speed. But there are some problems with ...
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Automatically convert files to h265 in a certain folder

What I am currently doing Everything is running on freenas (linux). I always have to go into the shell and start a script to transcode everything inside the folder. To be exact: I go to the shell and ...
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1 vote
2 answers
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Can I transcode a file with FFmpeg and read the output file on-the-fly?

I have a .M3U8 stream and I can download it and convert it with FFmpeg: ffmpeg -protocol_whitelist file,http,https,tcp,tls -i "org_file.m3u8" -c copy -bsf:a aac_adtstoasc output.mp4 However I can't ...
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what is the limitation on max cuda instances for video transcoding?

I have set up Nvidia V100 card on Azure Nc6s_v3 virtual machine. I have set up the latest CUDA driver and SDK. I compiled sample programs from "Video_Codec_SDK_9.0.20" and verified the max parallel ...
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Why do audio files converted from OPUS to M4A have a much higher bitrate?

When doing: youtube-dl -xf bestaudio/best <link to playlist> ...I get a lot of OPUS files at relatively "normal" bitrates like 130kbps. However, when I run the same command with the ...
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3 votes
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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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How to handle stream with ffmpeg and GPU

So in my project, I need to capture a video stream, decode the video, run the individual frames through an object detection algorithm and then play the output as a video. This whole operation is ...
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1 vote
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Unable To Transcode 8 Sources In One Instance Real Time (FFmpeg)

Just the other day I posted about my inability to transcode a multitrack video real time, -rc-lookahead ended up being the solution. However this was when recording fairly static signals, when each ...
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Multitrack Video Does Not Transcode Real Time

Recently this Github page, dedicated to bypassing Nvidia's encode limit, added windows support: https://github.com/keylase/nvidia-patch/tree/master/win Up until now I've been encoding my 5 live ...
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ffmpeg transcode twice compress further?

I have a collection of avi videos (say A). I first convert them into MPEG4 Part2 (say B) using ffmpeg -i ${inname} -vf scale=340:256,setsar=1:1 -q:v 1 -c:v mpeg4 -g 12 -f rawvideo ${outname}. The ...
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FFmpeg 4 versus version 2.2 very slow transcodes in VMWare CentOS 6 container

Whist using "ffmpeg version n4.0.1" I've noticed that on CentOS6 host within a VMware container the video transcoding takes almost twice as long as "ffmpeg version 2.2.1". Benchmarks below, ran 3 ...
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2 votes
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Getting Intel Quicksync working in Ubuntu 16.04 in headless mode for HW transcoding

/dev/dri and /usr/lib/dri doesn't exist. vainfo returns: error: can't connect to X server! error: failed to initialize display Aborted lspci | grep VGA returns: 00:02.0 VGA compatible controller: ...
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Reject DTS-HD MA

I have couple of video files containing both regular DTS as well as DTS-HD MA audio tracks. I want to get rid of the DTS-HD MA audio streams during transcoding, but have not figured out how to do so. ...
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1 vote
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bash script variables not proper

I updated it a little bit, but I'm still not getting the results I should be getting: #!/bin/bash find "$1" -type f | while read filename do videoCodec=$(ffprobe -v error -select_streams v:0 -...
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Ffmpeg transcoding video .vob (vcodec MPEG-2)

I want to transcode a file .vob to get the bitrate 1500 with 16/9 ratio I execute this command ffmpeg ffmpeg -i /path/video.vob -vcodec libx264 -vf scale=1280:-2 -strict experimental -b:v 1308k -b:a ...
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3 votes
1 answer
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Why is Plex Server transcoding file that can be direct played?

I've installed Plex Media Server in my Raspberry Pi 3. It works perfect but it doesn't have enough CPU power to transcode (when it tries the video freezes every two or three seconds). One of my Plex ...
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Intel i5 Kaby Lake Hardware-Assited transcoding of video and audio to VP9 and FLAC using ffmpeg

I have about 30 gigabytes of video (mostly MP4, some MKV and webm) I need to transcode to 8-bit VP9 with Free Lossless Audio Codec (FLAC) audio in an MKV container from various input codecs (AAC audio;...
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Maximising efficiency of my M4A music playlist

Reading this answer here and questions like: What lossy audio formats are more (or less) "efficient"? Are there any perceptible differences between the sound quality of 192 versus 320 kbps ...
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openload.cc How can I extract encoding settings of videos?

My customer needs streaming service for his IP cameras and he ask me about same output quality as videos in openload.cc but I can´t simulate similar quality.I tried several encoding combination but ...
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Any alternatives to VLC transcode for online stream?

I have 2 favorites public radio stations that I always wanted to listen on the phone but due to high quality 192kbps I was not always to listen because it needed good connection. Now using windows VLC ...
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1 vote
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Stuttering in VLC-Transcode

I'm trying to transcode a working internet stream to something my Dreambox could play. My current status is that I can play it on my desktop and on Dreambox, however, there is some constant ...
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2 votes
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Transcode Multiple Video Files at a Time in VLC

I am using VLC to transcode video files, in the convert/save menu it lets you select multiple files, but when you click Convert, it just converts the first file in the list. Ideally I would be able to ...
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Bulk transcoding ISO/IMG to MP4/MKV

I need a tool/script to help me convert my collection of DVD's to MP4. I've started using Plex instead of playing each image-file directly and it's quite a pain in the butt to manually convert a ...
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FFMPEG stop working with no error

I am using FFMPEG to create a video using pictures as input. I never had a problem with it, but now for some jobs I can't get correct outputs, some of them are broken. Using FFPROBE to check the ...
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handbreak does not extract subtitles

i have a personal DVD i am trying to backup to a medium that will not go the way of the 5" floppy... when i "rip" it via handbreak, i select subtitles, then i click "add all" and the subtitle does ...
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How do I transcode/compress mp4 source files on the Linux command line?

I have some rather large mp4s produced by my phone. They aren't very long, so they're probably not very compressed. What's an example of using a command line Linux tool to transcode one of these to ...
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How to batch convert to mp4 with arista-transcoder?

I dont understand how to list valid preset names and select the Computer - H.264 preset available in the arista-gtk listing. When I batch convert like arista-transcode -p "Computer - H.264" *.wmv the ...
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ffmpeg equivalent for -movflags faststart for audio

I have several video and audio files on my server that I wish to stream. I have converted all video files to mp4 and audio files to aac. Now I am streaming both type of files but it seems audio ...
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Downsampling and streaming video over a LAN (WiFi)

I have a Linux file server at home, and I'd like to watch video stored on it on my desktop. A very simple solution comes very close: use any old HTTP server to serve up the files, and view them in ...
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Transcode RTMP Live stream to multiple clients

I regularly follow livestreams on the website picarto.tv. The website uses RTMP for streaming, and therefore requires flash to show the video source. Many (mobile/embedded) devices don't have flash ...
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Cut an FFmpeg video based on frames not a timecode

I want to cut a video with FFmpeg using something similar to the code below: ffmpeg -i movie.mp4 -ss 00:00:03 -t 00:00:08 -async 1 cut.mp4 However I want to specify -ss and -t in frames instead of ...
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Can a processor gpu still be used for video transcoding if the motherboard is disabled from using processor gpu?

I am planning to get the following motherboard and cpu. Asrock Rack e3c224d4i-14s Intel Xeon e3-1276v3 However, after reading the spec sheet on Asrock Rack/Intel Ark, the above mentioned motherboard ...
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