Questions tagged [transcode]

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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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44 views

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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140 views

Transcode h265 to h264 “on the fly” for software NVR

I wonder if anyone has experience with transcoding h265+ to h264 in real-time? I'm having an IP-cam that only outputs h265 that I would like to use for surveillance purposes. The camera is the latest-...
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15 views

Streaming to Double or copy RTMP servers with ffmpeg [duplicate]

my current code on windows :loop title test ffmpeg -re -i "http://iptv.ts" -c:v libx264 -s 1280x720 -preset veryfast -minrate 2100k -maxrate 3100k -bufsize 3100k -pix_fmt yuv420p -g 50 -c:a ...
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57 views

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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1answer
34 views

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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1answer
43 views

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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1answer
1k views

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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34 views

How to mux Vorbis audio and VP9 into WebM format with MKVToolnix?

I downloaded 2 files from Youtube with the Kaner Youtube Downloader (a Firefox Extension). A VP9 file in the webm container An opus file in the ogg container How do I mux them both into a webm ...
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34 views

ffmpeg - constant frame-rate AND fixed bitrate

I am totally new to this and I am trying to transcode a video (.mp4) to make it having constant framerate and fix output bitrate (for video 24M, audio 240K). I have tried: ffmpeg -i <input> -...
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90 views

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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1answer
91 views

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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20 views

real time stream udp ts mpeg2 to localhost rtsp mp4

I am with a volunteer emergency service organization and a novice ffmpeg user. We would like to transcode & stream a real time udp ts mpeg2 Ethernet feed to my PC localhost via rtsp mp4. From the ...
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1answer
2k views

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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188 views

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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2k views

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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2answers
492 views

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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469 views

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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212 views

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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1answer
99 views

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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1answer
181 views

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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1answer
400 views

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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883 views

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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1answer
248 views

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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1answer
51 views

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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1answer
261 views

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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1answer
5k views

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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2answers
2k views

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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1answer
801 views

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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0answers
1k views

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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1answer
696 views

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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356 views

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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1answer
5k views

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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1answer
2k views

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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1k views

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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346 views

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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1answer
385 views

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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1answer
237 views

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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2answers
2k views

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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0answers
205 views

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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1answer
2k views

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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2answers
3k views

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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0answers
178 views

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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0answers
1k views

FFmpeg - Transcode video and keep original EXIF metadata in the transcoded file?

I am trying to transcode a video from a .mov (recorded with the iPhone) and add the original metadata (EXIF) to transcoded file, how can I achieve that? The original video contains EXIF metadata, etc. ...
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1answer
3k views

FFmpeg - Cut video into segments, transcode them individually, then concatenate & output to .ts

This is a follow-up question to audio error when concatenating clips using ffmpeg What I'd like to achieve is the following: Cut an input video into chunks Transcode each chunk (video and audio) ...
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1answer
319 views

Converting problematic 9.99fps video to something standard (ffmpeg?)

I recently got some CCTV video released to me via a FOIA/PA request. I'd like to put up the full version on YouTube, as well as version edited w/ Final Cut Pro. However, Handbrake, Quicktime, Final ...
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0answers
37 views

How can I transcode “faster playback speed” videos? [duplicate]

I'd like to transcode a video to have faster playback speed, for use on mobile devices / chromecast. VLC has this capability, but it seems to only work during playback. For example, if I use the ...
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0answers
2k views

How can I reduce the choppiness of my ffmpeg conversions

Here are the options I'm sending ffmpeg: ffmpeg. -i input.flv -crf 18 -profile:v baseline -level 3.0 -pix_fmt yuv420p -preset veryslow output.mp4 Here's the input file: http://ct.recorder.s3....
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2k views

Why does VLC cut off the end of my video when transcoding?

I am trying to "bake in" a custom made subtitle file (Advanced SubStation Alpha) for a short (3:46) video. However, despite trying an assortment of commandline options, VLC seems to always cut off the ...
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1answer
4k views

Transcoding Video to QuickTime Animation (RLE)

I need to transcode video created using the Camstudio Lossless Codec into the QuickTime RLE format in order to get it to work with some other software. What methods can I use to convert the video? I ...