17
votes
Accepted
convert KAZAM video file to a file, playable in windows media player
Your KAZAM video features YUV444P pixel format which WMP may not support without extra filters. Using ffmpeg, run
ffmpeg -i in.mp4 -pix_fmt yuv420p -c:a copy -movflags +faststart out.mp4
You can ...
- 32.3k
5
votes
Accepted
RTSP to RTMP converting fails after specific time only when IP camera enters night mode
I've solved the issue by rebuilding the timestamps from scratch with -use_wallclock_as_timestamps 1 and -fflags +genpts.
/usr/bin/ffmpeg -use_wallclock_as_timestamps 1 -i "rtsp://${source}" -fflags +...
- 191
5
votes
How to get FFMPEG to join non-sequential image files? (skip by 3s)
For the missing sequence part, I used 2 liner
CONCAT=$(echo $(ls *.png | sort -n -t _ -k 2) | sed -e "s/ /|/g")
ffmpeg -framerate 25 -i "concat:$CONCAT" -c:v libx264 -profile:v high -pix_fmt yuv420p ...
- 151
3
votes
"ffmpeg" set fontsize and font
I did solved this with " "
"subtitles=subtitle.srt:force_style='FontName=ubuntu,Fontsize=30'"
- 235
3
votes
Accepted
Add semi-transparent box around subtitle
Use
ffmpeg -i movie.mkv -strict -2 -vf "subtitles=subtitle.srt:force_style='FontName=ubuntu,fontsize=30,BorderStyle=3,OutlineColour=&H80000000',scale=720:-1" -qscale:v 3 Movie.avi
See Style ...
- 32.3k
3
votes
Crop selected area in all videos
Basic command is
ffmpeg -i in.mp4 -vf crop=iw:ih-25:0:0 -c:a copy out.mp4
Note that MP4s usually require the dimensions to be even, so the command above will actually crop 26 pixels from the bottom.
...
- 32.3k
3
votes
How to encode Apple ProRes on Windows or Linux?
This is the command line I have used to encode ProRes 4444. If you do not include -bits_per_mb you will get low res results in Windows 10. Many posts do not mention this little aspect.
ffmpeg -y -f ...
- 31
3
votes
Accepted
Export multiple clips from one video as separate files
I did it with shotcut. Credit to: https://forum.shotcut.org/t/export-one-track/7503/3
Steps
Load video into shotcut
click+drag video down to timeline
move playhead to desired position & Split at ...
- 141
3
votes
Accepted
Convert TTML Subtitles to STL or SRT in Linux
The ttconv Python package will do it. It can be installed with pip.
- 48
2
votes
What is good software for camera recording under Linux?
OBS (Open Broadcaster Software) is multi-platform (OBS is widely used in video game streaming). I haven't tried it yet myself for multiple cameras, but I know it supports at least one (as many ...
- 21
2
votes
120fps 720p footage with real time playback on Ubuntu? + editing?
If I read this right, you want to watch your 120fps videos at 0.25 their real speed, seeing every single frame but at 30fps. That's what I do (GoPro 3+, 720p, 120fps) but it's a bit involved.
I use ...
- 121
2
votes
Can I use a Linux Render Farm with a MAC Workstation running Adobe Premiere?
There are two steps, broadly speaking, to rendering a project in a NLE such as Premiere.
First step is for the NLE to generate the uncompressed final composite image for each output frame. This is ...
- 32.3k
2
votes
Accepted
FFMPEG add resize to my comand
Use
ffmpeg -i movie.mkv -strict -2 -vf "subtitles=subtitle.srt:force_style='FontName=ubuntu,fontsize=30',scale=720:-1" -qscale:v 3 Movie.avi
All filters applied to a single input should be ...
- 32.3k
2
votes
Accepted
ffmpeg cut same video to multiple pieces
Use ss/to as input options. This seeks at the demuxer stage, which is much faster.
ffmpeg -ss 00:22:23.345 -to 00:22:25.846 -i input.mp4 ...
You'll need a very recent build of ffmpeg (> Nov 19 2017)
- 32.3k
2
votes
FFmpeg with OpenCL support - Ubuntu 18.04
OpenCL is not what you need.
In https://trac.ffmpeg.org/wiki/HWAccelIntro, see the section on “FFmpeg API Implementation Status” — Notice that OpenCL is not applicable for encoding and decoding, only ...
2
votes
Audio/video sync software for Linux (preferably open source)
I assume that you have a sound channel recorded on the camera which is in sync with the picture. In that case you only have to find the offset between the audio channels.
This tool claims just that: ...
- 121
2
votes
Encode a small proxy file with multiple audio streams for editing on Linux
I've come up with this ffmpeg command:
ffmpeg -i original.mkv -c:v libx264 -tune animation -crf 35 -x264opts keyint=10 -pix_fmt yuv420p -c:a pcm_s16le -map 0 proxy.mkv
What this will do:
use h.264 ...
- 141
2
votes
Accepted
ffmpeg log missing "dup" and "drop" key-value pairs
If no frames are dupped or dropped, then those fields are not printed.
If you need a definitive statement, add -progress filename to print progress report to a file and search for dup_frames and ...
- 32.3k
2
votes
Accepted
DaVinci Resolve ignores MOV (QuickTime) metadata
I wrote a simple LUA script extension that can be executed from Workspace > Scripts toolbar after copying the script to {resolve directory}/Fusion/Scripts/Comp. Here's the source code. Currently ...
- 195
2
votes
Accepted
DaVinci Resolve Python 3.6 not found
Based on strace is seems that fuscript binary searches for libpython2.7.so and libpython3.6.so
$ /opt/resolve/libs/Fusion/fuscript -l py3
DaVinci Resolve Script Interpreter
Copyright (C) 2005 - 2020 ...
- 195
1
vote
Accepted
Combining two video fields into one (to create an interlaced video)
Use
ffmpeg -i top.avi -i bottom.avi -filter_complex vstack,il=l=i:c=i -c:v ffv1 il.avi
See docs for http://www.ffmpeg.org/ffmpeg-filters.html#vstack and http://www.ffmpeg.org/ffmpeg-filters.html#il
- 32.3k
1
vote
Nvenc produces corrupted video
Ok, this is a known bug in ssrr: https://github.com/MaartenBaert/ssr/issues/658
SOLUTION: You can use OBS, which is compatible with NVENC.
- 143
1
vote
Accepted
How to use MELT or FFMPEG for layering of a video (i.e. shifting an overlay of the same video by one frame to remove flicerking from LEDs)?
You would carry that out, like this:
ffmpeg -i in.mp4 -filter_complex \
"[0]split=2[base][shifted]; \
[shifted]setpts=PTS+1/TB/FRAME_RATE,format=yuva444p,colorchannelmixer=aa=0.50[shifted]; \
...
- 32.3k
1
vote
How to fix interlaced mpeg2 video marked as progressive?
Sorry for the late reply. For anyone wondering, the video actually is progressive. The next line in the mediainfo shows 2:3 pulldown, which is a software added telecine (soft telecine). You can also ...
- 11
1
vote
Is there an app that can automatically separate scenes/clips from a video file and export them?
Most professional quality video editing software has this kind of functionality. You can take a look at DaVinci Resolve, which is available for free on Linux. This article has more details about how ...
- 19.3k
1
vote
Accepted
How to split video in small clip?
General speaking, you can not split already encoded video into some chunks with arbitrary length without re-encoding.
The simplest way to make a cut is to get content between IDR frames. You could ...
- 36
1
vote
Accepted
Audio/video sync software for Linux (preferably open source)
It's a webtool but seems interesting:
https://github.com/allisonnicoledeal/VideoSync
This other is open, but - AFAIK - just for Windows:
https://github.com/protyposis/AudioAlign
- 36
1
vote
Stream desktop (linux) with FFMPEG to VLC
No need to use ffmpeg here:
Open VLC, go to Media > Open Capture Device and set Capture Mode to Desktop
Also see:
https://wiki.videolan.org/Documentation:Modules/screen/
https://wiki.videolan.org/...
- 132
1
vote
"ffmpeg" set fontsize and font
Remove the space.
ffmpeg -i movie.avi -strict -2 -vf subtitles=subtile.srt:force_style='FontName=ubuntu,Fontsize=30' -qscale:v 3 out.avi
- 32.3k
1
vote
Adobe Premiere Pro Rendering in Linux
At the moment, Adobe Premiere Pro struggles to run properly on the systems it supports--Windows 10 and Mac OS 10.10. As of today, Adobe does not even recommend running it on Mac OS 10.11! Premiere ...
- 4,730
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