We have a request to append output/timecode into metadata starting from frame 0.
It is done in nuke with addtimecode node, starting at frame 0 and timecode as 00:00:00:00 with a prefix of "output"
I'm trying to do it with ffmpeg but nto able to get it :(
I have tried with -metadata output/timecode="00:00:00:00" It didn't work
Metadata fields are dependent on your output format.
Related
I'm new to FFMPEG and I'm having a really hard time understanding the documentation: https://ffmpeg.org/ffmpeg-all.html#aspectralstats
I want to get the centroid value for an audio file using command line.
ffmpeg -i file.wav -af aspectralstats=measure=centroid -f null -
I get the following errors
[Parsed_aspectralstats_0 # 000002a19b1b9380] Option 'measure' not found
[AVFilterGraph # 000002a19b1c99c0] Error initializing filter 'aspectralstats' with args 'measure=centroid'
Error reinitializing filters!
Failed to inject frame into filter network: Option not found
Error while processing the decoded data for stream #0:0
Conversion failed!
What am I doing wrong?
The measure option was added mere 4 weeks ago. So, yeah, you probably missed it by a couple days. Grab the latest snapshot if you want to only retrieve the centroids. The snapshot you have should get you the centroids along with other parameters if you just call aspectralstats (no options).
Also, the aspectralstats outputs only goes to the frame metadata and not printed on stdout by default. So you need to append ametadata=print:file=- to your -af.
ffmpeg -i file.wav -af aspectralstats=measure=centroid,ametadata=print:file=- -f null -
<Shameless plug> FYI, if you're calling it from Python, I have implemented an interface for this in ffmpegio if interested.</sp>
I am attempting to create a online radio application using FFMPEG - an audio only DASH stream.
I have a directory of mp3 clips (all of the same bitrate and sample size) which I am encoding to the AAC format and outputting to a mpd.
This is the current command I am working with to stream a single mp3 file:
ffmpeg -re -i <input>.mp3 -c:a aac -use_timeline 1 -use_template 1 -window_size 5 -f dash <out>.mpd
(Input and output paths have been substituted for < input >.mp3 and < output >.mpd in this snippet)
I am running a web server and have made the mpd accessible on it. I am testing the stream using VLC player at the moment.
The problem:
Well, the command works, but it will only work for one clip at a time. Once the next command is run immediately proceeding the completion of the first, VLC player will halt and I need to refresh the player to continue.
I'm aiming for an uninterrupted stream wherein the clips play in sequence.
I imagine the problem is that a new mpd is being created with no reference to the previous one, and what I ought to be doing is appending segments to the existing mpd - but I don't know how to do that using FFMPEG.
The question: Is there such a command to append segments to a previously existing mpd file in FFMPEG? or am I coming at this problem all wrong? Perhaps I should be using FFMPEG to format the clips into these segments, but then adjusting the mpd file manually.
Any help or suggestions would be very much appreciated!
I use ffmpeg to record rtsp stream, it work good but the output file got some proble, when I use use K-Lite Codec Pack to open the output (avi) file the video cant be seek, forward, backward and dont display video time. It lock like i am viewing streaming.
here is the command i used
ffmpeg -i rtsp://27.74.xxx.xxx:55/ufirststream -acodec copy -vcodec copy abc.avi
video playing error with K-Lite Codec Park image
Looks like header file not been updated on output file. It's recommended to close output file by pressing "q" button while ffmpeg reads input stream to properly finalize output file.
I transcoding via FFmpeg (video codec - h264, container - MPEG-TS) output writing to local file (out.mpg). When FFmpeg dropped I restarted it with output to the same file (out.mpg). After this my video player shows incorrect file duration due to new FFmpeg process start counting PCR from 0.
Can I set starting pcr value at start FFmpeg ?
Run FFmpeg with key -copyts solved this issue.
I have media files in various formats that I want to be able to segment using ffmbc, same acodec, vcodec and container as original. I would like to be able to maintain the timecode data e.g. start_delay, from the original to destination media files ( with the segmented offset taken into account ).
At the moment when I copy using the command -i inputfile.mxf -vcodec copy -avodec copy outputfile.mxf ( segmenting options omitted ) the output file start timecode is set to 00:00:00.
The original files are mainly in .mxf and .mov container formats.
Is there a command for this that I am missing?
My bad, I clearly did not try the obvious. The command for setting the start timecode is: -timecode HH:MM:SS:FF