Questions tagged [video-encoding]

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0answers
13 views

Why are my colors separated/shifted when using obs/v4l2sink/v4l2loopback?

Im using OBS with v4l2sink and v4l2loopback to edit my video for a remote trainig. The preview in obs looks fine, but the video has some serious color shifts in any tool I try to display the ...
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0answers
39 views

Reduce file size from a list of video files in a directory using ffmpeg

I have a series of video files in a directory whose file sizes need to be reduced. They all share the same container (.mp4). So, I would like a command that, for every individual input, an output ...
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0answers
41 views

Vapoursync with Linux Mint 19.1

I am trying to install SVP (SmoothVideo Project) on Linux Mint 19.1 and I am running into problems with Vapoursynth installation. When I try to do the part "Building 3rd-party apps from sources -> ...
0
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1answer
467 views

Stream Intel RealSense camera to network using Raspberry Pi 4 with FFMpeg

Good day all So I have trying to stream my Intel Realsense D435 camera to my local network. After reading up on many different sites, tutorials, etc I figured out the following: What can I do with ...
0
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1answer
224 views

Cut dvbsub from MPEG-TS with ffmpeg

I have a bunch of MPEG-TS files, originally created by a hardware TV-recorder. ffprobe lists their content like so: Input #0, mpegts, from 'recording.ts': Duration: 02:14:57.67, start: 87544.254878,...
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0answers
90 views

Command line VOB to AVI/MP4 with good quality and deinterlace

I have some VOB files, grabbed from DVDs. I need to make AVI/MP4 files for uploading online. The original resolution is 720p and I want 720p, but need to scale as the pixels are not square (720x480 to ...
1
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1answer
42 views

Does ffmpeg support dropping chroma information when encoding dynamic scenes?

Video encoders use a lot of techniques to fit the bitrate restrictions. With high compression level even the simple MJPEG compression may partially or totally discard the chroma information. I wonder ...
-2
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1answer
655 views

Using ffmpeg to Compressed a Two Frame Video

I'm trying to use Ubuntu Linux 19.04 to convert an OpenShot video into a more efficient file-size. The video only contains two still images, and 20 minutes of audio, but for each file-type I save-as, ...
2
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2answers
2k views

Trans-coding hevc / x265 video file using VLC and viewing it on a chromecast

I've been successful at getting VLC to stream a x264 encoded file from a network file share to an old chromecast (which mine doesn't support hevc / x265 directly) using the commands below. vlc -vv --...
3
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0answers
8k views

How to significantly lower a video file size with ffmpeg without quality loss?

I see there are videos on youtube with 1080p resolution that are more than 10 minutes long and only 50-60 mb in size. I have a video only 3 minutes long and only 720p resolution but unable to bring ...
3
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1answer
498 views

IMX6 ADV7180 : no /dev/media0

I am using kernel 4.14.24 from kernel.org on a KARO-TX6Q and an ADV7182 on a custom board. With the kernel 4.1.15 from KARO git, I used the adv7180_tvin driver modified to work with adv7182. This ...
0
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1answer
18 views

Random lines during screen recording playback

Every time I record or screencast my desktop, once I play it back I get random lines appearing now and then, no matter what media player I use. They're either black or they show fragments of my ...
-1
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1answer
47 views

Accelerating Video Conversion

I like to compress large video files before storing them to hard disk. In Fedora-29-bash, I currently use the following ffmpeg command for re-encoding; it balances compression with quality: ffmpeg -...
0
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1answer
181 views

Cannot send desktop capture to ffserver?

I am simply trying to send a ffmpeg stream consisting of a desktop capture to a local ffserver: # ffserver >/dev/null 2>&1 & # ffmpeg -video_size 1600x900 -framerate 25 -f x11grab -i :...
1
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1answer
1k views

Stream/broadcast live video to local network (without VLC)

I am trying to make a perfect mobile webcam fitting my needs with the RPI and camera module I have here already. I run Arch both on the RPI and on the Laptop I intend as the "client". I have the cam ...
1
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0answers
304 views

trim video files via audio track information

Is there a way to pass a folder of .mp4 files and trim them by audio track? Say the first 20 seconds has no loud audio and the last 20 seconds has no loud audio, is there a way to remove the first and ...
1
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1answer
253 views

Split 4 Track WAV file into 2 stereo WAV files

The audio recorder my friend has can record 4 tracks at the same time, but unfortunately i records into a 4-track WAV file. The problem i have is that the DAW i use only accepts mono or stereo WAV ...
0
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0answers
142 views

h.264 video codec in konqueror

Visiting the page https://www.youtube.com/html5 from within konqueror I saw that the H.264 video codec is not supported. My question is: Is it possible to enable it for konqueror in any way? I'm ...
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1answer
1k views

H.264/MPEG-4 from PNG frames: how to, and how to tune compression

I often create digital animations by preparing all the frames in .png format (with minimal compression), that I need to convert to video format for upload to websites such as reddit, instagram, gfycat....
1
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0answers
269 views

Patching fourcc code INZI

I am using Ubuntu 16.04 64 bit to try to capture RGB and Depth images from a Realsense SR300 depth camera. I have installed the appropriate SDK etc, and the camera is being recognised and producing ...
1
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1answer
212 views

Create CBR TS file from MXF file

I am looking for a way to create CBR TS file from a high bitrate MXF input file. I have tried to use ffmpeg, but apparently it doesn't do a good job of creating CBR output file so right now I am a bit ...
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0answers
188 views

Convert corrupted VideoCD for uploading to YouTube

I have some home videos on VideoCDs and I would like to transfer to YouTube so I can share them with family. I backed up the CD images on my drive with dd and playing back those images with mplayer ...
3
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1answer
833 views

Hardware accelerated h.264 transcoding on i.MX6

Preface: I have a lot of .mts video recordings (mainly 576 to 720 lines) I need to cut and transcode to lower bitrate h.264. Nowadays I do this on with an all-in-one tool on my 2009 Core2Duo MacBook, ...
1
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1answer
886 views

Find all videos by codec (and not by container formats or MIME type)

How can I get the list of all my videos with the used video codec? I found some intersting commands like mediainfo, ffmpeg or exiftool but they giving a lot of informations only by one video. The ...
8
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1answer
1k views

Handbrake new VP9 codec is grayed out

Handbrake new VP9 codec is grayed out and could not be used. I installed Linux Mint fresh from ppa repo that is referenced on their homepage. libav and the vpx-tools are installed. What have I ...
1
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1answer
1k views

Adjusting keyframe rate ffmpeg/v4l2 Logitech C920 to YouTube Live

I am trying to stream video from a Logitech c920 to YouTube live via ffmpeg. I have a setup that works in Twitch, but YouTube rejects the stream with the message: Please use a keyframe frequency ...
3
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1answer
1k views

CUDA Context for NVENC not found after system suspend

Context I recently updated my nVidia drivers to 375.26 and recompiled FFmpeg N-83180-gcf3affa and OBS 17.0.2-5-g43e4a2e (sorry if these numbers don't mean anything, I'm not quite sure what version ...
1
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1answer
560 views

FFMPEG glue MPEG TS

I have movie split in many parts with duration 10-30 seconds. All movies are MPEG TS files. I want to merge them. I try to make following: ffmpeg -f concat -i join.txt OUTPUT.TS and ffmpeg -i "...
0
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1answer
5k views

“MPEG-1/2 does not support 3/1 fps” when sending webcam to ffserver

I am unable to send a stream to my ffserver. I started the server with ffserver -f /etc/ffserver.conf & where ffserver.conf has not been modified. I tried sending a webcam stream with ffmpeg -...
0
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1answer
1k views

What is the format name to have a MP4 video as output in ffmpeg?

The following command ffmpeg -f alsa -ac 2 -i plughw:0,0 -f video4linux2 -s vga -i /dev/video0 -f ogg - > video.mp4 Does not produce a .mp4 video. I want to replace -f ogg with -f <mp4 ...
4
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0answers
962 views

Don't wait for audio stream with ffmpeg/avconv using named pipes

I have two named pipes, audio_conv and video, for s16le and h264 streams, respectively. I want to convert them to webm format on fly. Data to these pipes proceeds from my application, that parses ...
1
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0answers
195 views

Encoder to msrle format with FFMPEG

I need to create some files for an old windows API, for a video playback. The native windows files which works with this old API have the format of MSRLE. They are used as small animations during copy,...
2
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1answer
751 views

Handbrake on Debian not aware of x265 despite installed

I am about to convert a lot of old MKV files encoded with x264, which at the moment are un-downloadable, to more efficient HEVC (x265, H.265) format, using HandBrake software. My system being Debian ...
1
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1answer
570 views

Add filters to ffmpeg presets

I would like to add filter parameters under ffmpeg preset (e.g. -spre directive). Suppose a simple test.ffpreset under ~/.ffmpeg like this: vcodec=h264 bitrate=1200 acodec=copy How do we add hqdn3d=...
0
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1answer
544 views

ffmpeg bash script segment template

I was trying to control ffmpeg file segment function through a bash script to cut a large movie file into smaller pieces. I took a look at the documentation here but this doesn't really cover what I ...
6
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2answers
9k views

Convert image based subtitle to text based subtitle inside MKV file

How do I convert a hdmv_pgs_subtitle (which is image based) to a text based subtitle in a MKV file? I have tried ffmpeg -i in.mkv -c:v copy -c:a copy -c:s mov_text out.mkv but that results with the ...
1
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1answer
2k views

Convert .264 to .mp4 using avconv

I have a video file (with no audio stream) taken from a Lorex CCTV DVR. The video file has a suffix of ".264" which I assume means its format is raw h264. I cannot play this video on certain ...
1
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2answers
1k views

avconv commandline for downsampling HD video to SD

I'm trying to downsample a HD video recorded by TVheadend to SD size using the following command: avconv -i infile.ts -map 0:v -map 0:a:0 -map 0:a:1 -c copy -c:v mpeg2video -r 25 -qscale:v 2 -s:v ...
1
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0answers
3k views

How to re-encode file A.mp4 with the same settings as B.mp4?

I have a MP4 file with AAC audio and H264 video, let's call it B.mp4. I also have file A.mp4 with the same picture resolution, but: different FPS possibly different audio/video bitrate different ...
0
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1answer
761 views

gstreamer dependencies in HandBrake on fedora

I'm running HandBrake on Fedora 23. The "show preview" feature is not able to actually play video, raising two popups: "Missing GStreamer plugin: MPEG-4 AAC Decoder" and "Missing GStreamer plugin: H....
2
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3answers
5k views

ffmpeg: nvenc mit crf option - very low bitrate

I bought a new computer some time ago. I installed nvenc for ffmpeg to encode my videos with the H.264 codec. To optimize I used the -crf option but something went wrong. I want to encode a full ...
1
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1answer
1k views

ffmpeg output.mp4 with size 0

I have a video upload script in php where I exec the following command: exec("/usr/bin/ffmpeg -i ".$folder."/".$filenameIn.".mp4 ".$folder."/".$filenameOut.".flv 2>&1", $output); And the ...
1
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0answers
108 views

What's the canonical way to get individual stream size in a video file?

I have a video file. It contains a video stream, and a couple of audio and subtitle streams. I want to get the size of each of these streams. I've already looked at ffprobe/avprobe and mediainfo, to ...
1
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0answers
232 views

Convert video with broken codec information

I downloaded using youtube-dl from https://www.dr.dk/tv/live/dr2#!/ The saved file is .flv, but it does not play with vlc/mplayer. avconv cannot convert it: $ avconv -i hl.flv hl.mp4 avconv version 9....
2
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1answer
1k views

avconv “Error while opening encoder for output stream” for subtitles?

I'm trying to convert a video changing the audio codec from aac to ac3_fixed: avconv -i input.mkv -c:v copy -c:a ac3_fixed output.mkv However this commands aborts after showing the following output: ...
48
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3answers
104k views

Re-encoding video library in x265 (HEVC) with no quality loss

I am trying to convert my video library to HEVC format to gain space. I ran the following command on all of the video files in my library: #!/bin/bash for i in *.mp4; do #Output new files by ...
0
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1answer
2k views

Convert files from .iso using Linux

I have a number of .iso video files 4.7GB is size. I'd like to convert them to perhaps .avi or .mpg4 format to reduce the size and for playing on equipment that likes files not DVDs. Running Linux ...
2
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1answer
6k views

how to convert MOD video file without loosing quality to modern popular format for TV

I have MOD video file. My LG TV doesn't support MOD. How can I convert MOD video file without loosing quality to modern video format to watch it on different modern TVs?
3
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0answers
319 views

Encoding a video from Unix Timestamps + ms

I have a sequence of images that were taken from a camera that have been saved in a naming convention that contains the unix timestamp as well as milliseconds. For instance, 1333351808430.jpg (I typed ...
1
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1answer
472 views

Avconv creates 0 byte outputfile after applying frame rate reduction

I installed avconv because I am too stupid to install ffmpeg, now I realized I am even more stupid. I tried to reduce the framrate from 30 fps to 24 fps following a very straigtforward tutorial: # ...