I'm trying to convert a gif file to webm file using the below which works fine however I’m wondering is it also possible to reverse it as well using ffmpeg or would I need to reverse it using imagemagick first then cover it using ffmpeg
ffmpeg -i your_gif.gif -c:v libvpx -crf 12 -b:v 500K output.webm
Any help is appreciated
The script posted here might help you.
This one seems to be in bash but ripping the commands should work on Windows as well.
https://github.com/WhatIsThisImNotGoodWithComputers/ffmpeg-webm-scripts
These are the relevant lines of code (note that they need to edited for your setup):
ffmpeg -i "${INPUT_FILE}" -ss $START_TIME -to $TO_TIME -an -qscale 1 $TEMP_FOLDER/%06d.jpg
cat $(ls -r $TEMP_FOLDER/*jpg) | ffmpeg -f image2pipe -vcodec mjpeg -r 25 -i - -c:v libvpx -crf 20 -b:v $FRAMERATE $CROPSCALE -threads 0 -an $OUTPUT_FILE
You basically have to convert all stills to jpgs and then back into webm, but in reverse order.
From ffmpeg --help, you can see what codecs ffmpeg supports with ffmpeg -codecs. ffmpeg -codecs|grep -i gif on mine says it supports gif.
ffmpeg checks extensions to get file type if you don't override,
ffmpeg -i onoz.webm onoz.gif
does the trick just fine.
Related
ffmpeg -f avfoundation -i "1:0" -vf "crop=1920:1080:0:0" -pix_fmt yuv420p -y -r 30 -c:a aac -b:a 128k -f flv rtmp://RTMP_SERVER:RTMP_PORT/STREAM_KEY
Hello guys, the above command works pretty well. It records the audio/video of the computer. But what I want to do is pipe a repeating video or image(png/jpeg/gif), so that there is no live video feed from the computer, but just the image on the stream with the audio.
How would you go about doing this?
Also, if you know any programming interfaces that can do this same thing, please give suggestions. Because I would rather not use a CLI.
I think you should be able to achieve this by using -loop and some -map:ing. I can't test with avfoundation myself but something like this works for me:
ffmpeg -loop 1 -i image.png -i file_to_take_audio_from.mp4 -vf "scale=1920:1080:0:0" -pix_fmt yuv420p -r 30 -c:a aac -b:a 128k -map 0:v -map 1:a output.mp4
Replace -i file_to_take_audio_from.mp4 with -f avfoundation -i "1:0" and output.mp4 with -f flv rtmp://RTMP_SERVER:RTMP_PORT/STREAM_KEY.
Also you might be able to skip -vf if the image has correct resolution.
Hope that helps!
Use none or no value at all (:0) for the video device index and provide a secondary input:
ffmpeg -f avfoundation -i :0 -i image.png ...
There's a loop option for images such as animated GIFs and -stream_loop for input streams.
You can use the FFmpeg APIs directly instead of CLI.
I need to convert tiff images into h265 file.
I'm using the following command:
ffmpeg -y -framerate 30 -i input.tiff -c:v libx265 -x265-params no-open-gop=1:min-keyint=4:keyint=4:bitrate=60 -preset medium -f ssegment -segment_time %ST% "outputfile.265" 2>&1
I get an output of "error At least one output file must be specified".
What am i missing?
Is there anything i need to do to activate my use of 265?
Im using ffmpeg vs.3.4.1
Thanks in advance!
As Mulvya said, please share full log. Because this worked for me:
ffmpeg -y -framerate 30 -i ./lzw.tiff -c:v libx265 -x265-params no-open-gop=1:min-keyint=4:keyint=4:bitrate=60 -preset medium -f ssegment -segment_time 0:0 "outputfile-%03d.265" 2>&1
The tiff file downloaded from here: http://users.wfu.edu/matthews/misc/graphics/formats/formats.html
I am trying to create a video output from multiple video cameras.
Following the example given here Presenting more than 2 videos using FFmpeg
and other similar examples.
but Im getting the error
Output pad "default" for the filter "src" of type "buffer" not connected to any destination
when i run
ffmpeg -i /dev/video1 -i /dev/video0 -filter_complex "[0:0]pad=iw*2:ih[a];[a][1:0]overlay=w[b];[b][2:0]overlay=w:h" -shortest output.mp4
Im not really sure what this means or how to fix it.
Any help would be greatly appreciated!
Thanks.
When using the "padding" option, you have to specify which is the size of the output image and where you want to put the input image
[0:0]pad=iw*2:ih:0:0
tested under windows 7 with file of same size
ffmpeg -i out.avi -i out.avi -filter_complex "[0:0]pad=iw*2:ih:0:0[a];[a][1:0]overlay=w" -shortest output.mp4
and with WebCam Cap (vfwcap) and a still picture (as i have only o=1 WebCam). BTW you can see how to scale one the source to fit in the target (just in case your source have different resolution)
ffmpeg -y -f vfwcap -r 10 -i 0 -loop 1 -i photo.jpg -filter_complex "[0:0]pad=iw*2:ih:0:0[a];[1:0]scale=640:480[b];[a][b]overlay=w" -shortest output.mp4
under Linux:
ffmpeg -i /dev/video1 -i /dev/video0 -filter_complex "[0:0]pad=iw*2:ih:0:0[[a];a][1:0]overlay=w" -shortest output.mp4
if it doesn't work test a simple record of video 1 and after of video 0 and check their properties (type, resolution, fps).
ffmpeg -i /dev/video1 -shortest output1.mp4
ffmpeg -I output1.mp4
If you still have issue, update your question with ffmpeg console output (as text) for video and video 0 capture and also of the call with the overlay
I am using FFMPEG to convert uploaded videos to .flv, after conversion the flv video doesn't have information about it's duration. So the user cannot rewind/forward, replay or see a specific part of it. The code is as follows:
"ffmpeg -i $srcfile_path -s 320x240 -ar 44100 -b 2048k -r 12 $desfilepath";
Please help. Thanks in advance.
I ran the following command and it worked.
"ffmpeg -i $srcfile_path -f flv - | flvtool2 -U stdin $desfilepath"
This requires flvtool installed on your system. I am using an FFMPEG and FLVTOOL2 enabled server, so it worked.
That's very strange, I have been using ffmpeg to convert videos from one format to another without any issues. See example below:
ffmpeg -i input.avi -b:a 192K -b:v 2400 -s hd720 -c:v mpeg2video output.mpg
I am sure you know the syntax.
How to convert image and music to video? I would like YouTube video. I like FFMPEG command or other Ubuntu free software. I would like: *.mp3 + *.jpg = *.flv
Here is an example using a recent ffmpeg syntax:
ffmpeg -loop 1 -i image.jpg -i music.mp3 -shortest -c:v libx264 -crf 20 -tune stillimage -c:a copy output.mkv
This example will copy the audio instead of re-encoding to preserve quality. Adjust quality if desired with the CRF option. See the FFmpeg and x264 Encoding Guide for more information.
Super User (another StackExchange site) is a better place for ffmpeg usage questions since Stack Overflow is programming specific.
Today I was in need of merging an image and an audio file into a video file. Since none of the answers that I found on SO worked for me, I'm leaving here what worked for me after trial and error:
ffmpeg -loop 1 -t 205 -i audio.mp3 -i image.jpg -crf 20 test.flv
Where 205 is the duration of the input mp3 file in seconds -> 3:25 minutes.
(Tested with FFmpeg SVN-r13582)