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FFMPEG QUESTIONS

ffmpeg 0.5 flv to wav conversion creates wav files that other programs won't open
ffmpeg 0.5 flv to wav conversion creates wav files that other programs won't open
I hope this helps you . Try having ffmpeg directly operate on the input/output files, instead of piping data into and out of ffmpeg:ffmpeg -i INPUT_FILE.FLV -vn -acodec pcm_s16le -ar 16000 -ac 1 -f wav OUTPUT_FILE.WAV
TAG : ffmpeg
Date : November 22 2020, 07:01 PM , By : p2sk
encode video in reverse?
encode video in reverse?
seems to work fine No, it isn't possible using ffmpeg to encode a video in reverse without dumping it to images and then back again. There are a number of guides available online to show you how to do it, notably: http://ubuntuforums.org/showthread.p
TAG : ffmpeg
Date : November 17 2020, 07:01 PM , By : Rickipedia
What does “has_b_frames” mean in FFprobe output?
What does “has_b_frames” mean in FFprobe output?
seems to work fine has_b_franes in general indicates whether there's video delay i.e. is the frame presented in same order as decoding. The actual attribute being referenced depends on the specific bitstream format. For H264, it's the maximum expecte
TAG : ffmpeg
Date : October 14 2020, 12:00 AM , By : ZyNc ELiTeZ
How to sync multiple rtsp inputs in ffmpeg?
How to sync multiple rtsp inputs in ffmpeg?
around this issue Try adding -fflags nobuffer -flags low_delay -strict experimental before -i. you may see few currupted frames at the beginning since there is no reference frame.
TAG : ffmpeg
Date : October 06 2020, 09:00 PM , By : Luis
ffmpeg compilation with --arch=x86_64 always compiles with x86
ffmpeg compilation with --arch=x86_64 always compiles with x86
hop of those help? Don't worry you've got an x86_64 ffmpeg. The mentioned message is normal for x86_64 compilation as ffmpeg configure combines all x86 architectures in one 'x86' arch:
TAG : ffmpeg
Date : October 06 2020, 08:00 PM , By : Peter Tippett
ffmpeg same bit rate in hls file across resolutions
ffmpeg same bit rate in hls file across resolutions
fixed the issue. Will look into that further Add the -b:v option per output with the appropriate stream specifiers like your other options. The resulting BANDWIDTH values will change accordingly.Other stuff:
TAG : ffmpeg
Date : October 06 2020, 05:00 PM , By : Adam Shatzkamer
Speed up video encoding
Speed up video encoding
seems to work fine The question is if I could always use this idea to produce html5 compatible video
TAG : ffmpeg
Date : October 04 2020, 08:00 AM , By : Paul Beck
How to decode MP4 file use GPU use ffmpeg.autogen?
How to decode MP4 file use GPU use ffmpeg.autogen?
I wish this helpful for you You need change VideoStreamDecoder class:First you need to configurate your AVCodecContext with using HWDevice of your machine. Something like this:
TAG : ffmpeg
Date : October 03 2020, 06:00 PM , By : shinsenai
Video capture by FFMPEG with closed captions data
Video capture by FFMPEG with closed captions data
Does that help Encoding EIA-608 captions into the video file has been an outstanding feature request for some time. There is currently an open issue for adding support to ffmpeg and it has not yet been addressed.This request comes up on mailings list
TAG : ffmpeg
Date : October 03 2020, 03:00 AM , By : MaxM
FFmpeg can't stream AAC files from stdin?
FFmpeg can't stream AAC files from stdin?
Hope that helps The m4a is a MPEG-4 Part 14 (MP4) container and not raw AAC and might require seeking. You might be able to pipe it if the moov atom is placed at the beginning of the file (ie. when using faststart) but you're better off with the inpu
TAG : ffmpeg
Date : October 02 2020, 12:00 PM , By : rainu
how to solve ffmpeg video merging complain about parameters mismatching
how to solve ffmpeg video merging complain about parameters mismatching
should help you out The concat filter is complaining about the mismatch in resolutions between the two videos. Resize one of them to the size of the other.Below, I rescale and pad the intro to the size of the main video.
TAG : ffmpeg
Date : October 01 2020, 11:00 PM , By : Mark Blackwell
FFMPEG curtain effect slideshow from images
FFMPEG curtain effect slideshow from images
I wish did fix the issue. I have bunch of images that i have to convert to slideshow with curtain effect. currently i am running this command that convert images to video.
TAG : ffmpeg
Date : September 20 2020, 01:00 AM , By : junkverse
UDP Receiver needs to start before udp sender
UDP Receiver needs to start before udp sender
around this issue You need to send SPS/PPS data periodically if you want to have random access. If you don't, this data will only get send in the very beginning. This information is critical for decoding a H.264 stream. Consider adding h264parse befo
TAG : ffmpeg
Date : September 14 2020, 10:00 AM , By : pandurang Chavan
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