I want to attach several GIFs and then change the FPS to 10.
ffmpeg -f concat -safe 0 -i 1.txt -filter:v fps=fps=1 -c copy output.gif
Executing the above command will result in the following error:
Filtergraph 'fps=fps=10' was defined for video output stream 0:0 but codec copy was selected.
Filtering and streamcopy cannot be used together.
Except for filter options to adjust the FPS, the following error will not occur, but another problem will occur.
Remove -c copy because you can't stream copy and filter the same stream at the same time.
ffmpeg -f concat -safe 0 -i 1.txt -filter:v fps=10 output.gif
Related
I have one image and one video. I would like to add image as video just before actual video so i can stream video with intro frame for 5 seconds.
I found one command and full fill my requirement but in that command image added at the end of the video and i need beginning of the video. Let me share command below:
ffmpeg -i 1.mp4 -loop 1 -t 5 -i 2.jpg -f lavfi -t 5 -i anullsrc -filter_complex "[0]split[base][full];[base]trim=0:5,drawbox=t=fill[base];[1][base]scale2ref=iw:ih:force_original_aspect_ratio=decrease:flags=spline[2nd][base];[base][2nd]overlay='(W-w)/2':'(H-h)/2'[padded];[full][0:a][padded][2:a]concat=n=2:v=1:a=1[v][a]" -c:v libx264 -c:a aac -strict -2 -map "[v]" -map "[a]" output.mp4
Image should be resize dynamically according to the video resolution.
Best solution will be appreciate from bottom of heart.
ffmpeg -i 1.mp4 -loop 1 -t 5 -i 2.jpg -f lavfi -t 5 -i anullsrc -filter_complex "[0:v]trim=0:5,drawbox=t=fill[base];[1][base]scale2ref=iw:ih:force_original_aspect_ratio=decrease:flags=spline[2nd][base2];[base2][2nd]overlay='(W-w)/2':'(H-h)/2'[padded];[padded][2:a][0:v][0:a]concat=n=2:v=1:a=1[v][a]" -c:v libx264 -c:a aac -map "[v]" -map "[a]" output.mp4
No need for the split filter.
Do not re-use labels. Each output label must be unique. For example, you used [base] several times. So I renamed the next one [base2].
Order of video is determined by the order given to the concat filter. I re-arranged it so [padded][2:a] plays before [0:v][0:a].
-strict -2 hasn't been needed since 2015 (it was for the AAC encoder). You don't need that unless your FFmpeg is very old.
avconv -y -i input.avi -b 915k -an -f mp4 -ar 44100 -f s16le -ac 2 -i /dev/zero -acodec libfaac -ab 128k -strict experimental -shortest -vcodec libx264 output.mp4 -loglevel fatal
First of all, this seems to be an old version of avconv, since the command line has changed since then (but not too much).
So, let's break it down:
-y
This answers 'yes' to questions like "do you want to overwrite the output file".
-i input.avi
This gives the program the file input.avi as an input
-b 915k
This asks to change the bitrate to 915 Kibibytes per second
-an
This removes all the audio from the output.
-f mp4
Sets up MP4 as the format of the output file
-ar 44100
This sets audio sampling rate of the following input file.
-f s16le
This sets the format of the audio of the following input file.
-ac 2
This sets number of channels of audio to two.
-i /dev/zero
This adds another input file that consists entirely of zero input
-acodec libfaac
This reencodes the audio (silence most likely) with libfaac
-ab 128k
Setting the audio bitrate to 128 Kbps
-strict experimental
Allows avconv to use nonstandard approaches while encoding.
-shortest
Ends encoding when the shortest of the inputs has ended. This is needed because /dev/zero will never end.
-vcodec libx264
This sets the library to do the video encoding. The codec will be (unfortunately) h264
output.mp4
This is the name of the output file
-loglevel fatal
Fatal messages will be written as the log, and that's it.
In the future you may find man avconv to be your friend.
I have a problem that to save Output RTP as a file.
(Is that a possible? Am I Right?)
Trans-coding goal as below:
1. Save the RTP stream to file in local storage using FFMPEG.
2. Input is file.
3. Output is RTP stream file.
I`m using that.
./ffmpeg -re -i ../Video_Sample/03.Fashion_DivX720p_ASP_87s_1000k_720p.mp4 -c:v libx264 -b:v 1000k -preset superfast -an -f rtp -y test.rtp
But I got a message like that :
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
How can I fix it?
RTP is the Real-time Transport Protocol and not a file.
If you want to stream your mp4 file you could do it as followed:
ffmpeg -re -f mp4 -i ../Video_Sample/03.Fashion_DivX720p_ASP_87s_1000k_720p.mp4 -vcodec libx264 -b 1000k -preset superfast -an -f rtp rtp://hostadress:port
Did you mean rpt (Report File) file?
I have troubles with setting constant output bitrate. Every time I try I am getting same bitrate as input (I wanna downrate the file)
As input I have MPEG2/MPEG-A file.mpg with VBR 10Mb
As output I want MPEG2/MPEG-A file.ts with CBR 8Mb
avconv -i file.mpg -codec copy -b 8M -maxrate 8M -minrate 8M -bufsize 4M -f mpegts file.ts
Is there something wrong there? Can you suggest me better parameters so I can get better output quality?
-codec copy tells avconv to just copy the first video, audio and subtitle bitstream of the input to the output. There will be no re-encoding, so any of -b, -maxrate, -minrate or -bufsize don't make sense.
So:
Remove -codec copy.
Use -b:v instead of -b since -b alone is ambiguous and could refer to both video and audio.
Copy the audio stream with -c:a copy.
In essence:
avconv -i file.mpg -b:v 8M -maxrate 8M -minrate 8M -bufsize 4M -c:a copy -f mpegts file.ts
Here is the command that I am using to add a logo to a stream
avconv -f alsa -i pulse -f x11grab -s hd720 -i :1.0+nomouse -vf "movie=logo.png [watermark]; [in][watermark] overlay=10:10 [out]" -acodec libvo_aacenc -vcodec libx264 -threads auto -f flv rtmp://server
How can I add a second picture to the stream? Is there a way to do this without using -filter_complex as it's not available?
Thank you.
Yes, just add another set of movie and overlay filters. Something like (split over multiple lines for clarity)
-vf "
movie=logo1.png [watermark1];
movie=logo2.png [watermark2];
[in][watermark1] overlay=x1:y1 [watermarked1];
[watermarked1][watermark2]overlay=x2:y2[out]
"