Questions tagged [libav]
An open source audio/video library.
Inexperienced with videos and looking for advice for dealing with incorrect avi framerate and possible alternatives
Hi there I am aiming to record 1 hr videos at 500x375) from a raspberry pi (running 64-bit bullseye) which need to be recorded in such a way that they can endure unexpected program termination or ...
Using ffprobe to detect black frames outputs duplicate results
I'm using ffprobe to detect black frames of a video. However, the output produces duplicate entries for each black_start and black_end. Looking for help in figuring out why it duplicates these results....
ffmpeg: VAAPI can't do nearest neighbor scaling?
I've been using ffmpeg on my laptop for some time and I could have sworn that scale_vaapi had an option to set the flags to nearest neighbor. I need nearest neighbor scaling because I'm converting low-...
MP4 Video created with ffmpeg C++ api does not show in OSX
I am writing a MP4 video from scratch using the C++ API (libav* 4.1.1). This video can be played back just fine using ffplay or VLC. But the Finder Preview and the Quicktime Player on OSX (10.13 and ...
Are ffmpeg prores files reliable enough to be used in production/broadcast environment?
Recently I'm transcoding a lot of material that I wish to use in broadcast and production environment where they use all sort of macs and apple software. I'm not very fan of apple computers and I ...
How is possible for YouTube and Vimeo transcode so fast?
For the bit I read YouTube and Vimeo rely on servers powered by some modified libs i guess like libavcodec and tools like ffmpeg in a serious custom build. Let's assume a transcode to h264 but the ...
Libav/ X264 failed to compile with Hi422p profile and mp4 container support [closed]
My goal is to encode several videos from SD PAL captured in ProRes(HQ) 422 10bit through AJA Kona 3 to H264 with Hi422p profile in .mp4 container. I work on Mac OSX 9. I try the last x264 10bit ...
avconv: How to blur scenes?
I want to blur some scenes with avconv The ffmpeg command -find it here- is: ffmpeg -i input.avi -vf "boxblur=enable='between(t,22,113)'" -codec:a copy output.avi doesn't work with avconv ...
Invalid timebase converting videos from Galaxy S3
I have a video that I recorded on my phone and would like to flip horizontally. I am using the following command: avconv -i 20131117_220136.mp4 -vf "hflip" 20131117_220136.flipped.mp4 I get the ...
Deinterlace by dropping even lines from command line
I want to make an interlaced video with 50fps into a 25fps progressive, in the process i'm also reducing the size of the frame. Currently i am using avconv and there are deinterlacing options, however,...