Ffmpeg wait for input. don't rely on stdin to answer if you have a question.

Ffmpeg wait for input. StandardOutput. jpg with the pipe. Example: ffmpeg -reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2 -i input -c:v copy -c:a copy outputfile. The 'timeout' argument works when ffmpeg is acting as a server. 168. It's content is only ffmpeg. Try stdbuf -i10M ffmpeg … and see if it helps … You may iIncrease or decrease the number 10 (in megabytes) to adjust the standard input stream buffering. Nothing gets written to StandardOutput. In your case, your command would look something like: ffmpeg -sample_rate 44100 -f s16le -i - -ar 22050 -codec copy -f wav - In this case, -ar 44100 and -f s16le apply to the input, since they came before the input. mp4 In your case, replace input. Oct 10, 2020 · ffmpeg is often run as an interactive program taking user input from stdin e. Is there an option for ffmpeg to wait for input and if it comes back on, continue the transcoding and output? Feb 6, 2015 · Sometimes you want ffmpeg to ask you whether it should overwrite a file. Opening an input file: video. How can I make ffmpeg fill in these paused sections with silence in the output? Dec 30, 2010 · Example [first ffmpeg transcodes the input stream with adding padding, the output is elementary stream, the second ffmpeg gets elementary stream and encapsulates it into mp4-container]: ffmpeg -i test. 0. h264 -vcodec libx264 -vf pad="width=iw+16:height=ih+16:color=white" -f h264 -y -an - | ffmpeg -i pipe:0 -vcodec copy -y test. Did you try -re ? Carl Eugen When you try to take input from a live rtmp source, ffmpeg and ffplay either don't connect or take an extraordinary amount of time to begin processing data (1-10 minutes, or never). e. bat and 1. mp4 -vf format=yuv420p is for compatibility reasons. I want to run FFmpeg and give the file as input for live streaming. mp4 GIF output. This is the blocking line, it waits for more input from me. By calling this method multiple times, an arbitrary number of input files can be added. Basic Conversion. Mar 5, 2022 · My solution was to use ffmpeg to convert this to MPEG-TS (or something else) that can be played by VLC; I tried different possible solutions, like making a TCP server which exposes this stream, instructing ffmpeg to read the input from there. Jun 8, 2011 · You could use the *-loop_input* command-line option: ffmpeg -loop_input -re -timestamp now -f image2 -r 25 -sameq -i input. Dec 25, 2022 · Is there a flag I need to set for windows? There are 2 possibilities -timeout and -stimeout:-timeout. Sometimes the input stream goes offline for few seconds and ffmpeg stops the process which requires manual restart. or ffmpeg -i INPUT -f mpegts udp://host:port Apr 6, 2020 · So I have an ffmpeg command set up that is converting audio piped in through stdin. Press [q] to stop, [?] for help So its two issues here -i input_url: This is the input file(s). command line example is: Mar 3, 2015 · I'm using a C# process to call ffmpeg like this:-f h264 -i pipe: -an -f mjpeg -q:v 1 pipe: I pipe in the source data stream using the process . Oct 9, 2017 · I have a program which saves game play in a file. series of images ffmpeg -loop 1 -i %03d. Jun 15, 2022 · Here I am trying to stream video using ffmpeg from images and audio file this code below works fine but it is start streaming after stdin closed, I would expect ffmpeg to start processing the pipe input as it is received, and immediately output the result. Parameters: My inputs are TS http or udp. mp4 – Oct 29, 2013 · So I see now its kind of not ffmpeg really hanging, the issue is that my java code which reads the inputstream from the linux process will block since ffmpeg never returns a end of line, which I see now when Im running the command. I need a way to have the current while loop iteration to wait until ffmpeg is complete before continuing to the next. – Add an input file with specified options. exe and ffmpeg and changed the filename to 1. png -t 30 -vf format=yuv420p output. The end result is, files not getting processed. This will ffmpeg -loop 1 -i input. It sits, apparently waiting. BaseStream and get the returned data from . But ffmpeg is complaining that it cannot detect the container type. mts -c:v libx264 test. here of course we don't have the chance to answer "yes" or "no" and -nostdin will make the process to fail and exit when a user interaction is required. 12:4567 This is work well, Mar 9, 2016 · Try to put those options before the input. However, this audio that is being input isn't piped in constantly, and can will stop, sometimes for several seconds, before resuming. g. cmd but neither worked. mp4 but it seems that ffmpeg quits once it reaches the end of the pipe, instead of waiting for new data Jan 28, 2022 · anyhow, think of ffmpeg's idea of "seeking forward" past things the user doesn't want to see when input is from a pipe the same way tail seeks forwards in that same circumstance, by read()ing the content and then ignoring it until it gets to something that is wanted as output; whereas if it's pointing to a real file in a format that's amenable to random access it can take advantage of that Mar 25, 2023 · (And because ffmpeg arguments can be used to write to arbitrary files, "mess you up" in this case could mean someone could build a malicious filename that could cause ffmpeg to overwrite any file of their choice; think about /uploads/vid. Sep 17, 2014 · -pix_fmt yuv420p set pixel format for compatibility since input is an image (JPEGs are often YUV444, which many decoders will not accept)-vf "<options>" sets video filter; scale=3840:2160 specifically scale to 3840x2160 (4K) You will want to use 3840:-1 or -1:2160 if your input is not exactly 16:9 (or whatever your target ratio is). not stream copying): "-ss" is also "frame-accurate" even as input option. I. You must log in to answer this question. As it says in your quote, "wait for incoming connections". Feb 16, 2013 · Stack Exchange Network. Dec 12, 2016 · ffmpeg -v debug -probesize 10000 -r 12 -analyzeduration 0 -vsync 0 -async 0 -i video -f s16le -ar 8000 -analyzeduration 0 -channel_layout mono -i audio_conv -f webm - | ffplay - From ffmpeg log: Successfully parsed a group of options. BaseStream. when it asks if you want to overwrite target file. Set maximum timeout (in seconds) to wait for incoming connections. You can specify multiple input files. Jun 29, 2024 · ͏ The input will be parsed by keyframe, which is very fast. No errors. This is not an answer. exe which used to work. Jan 11, 2016 · I used this command to change the streaming parameters : ffmpeg -i rtp://192. bat. jpg -an -vcodec mpeg2video out. mts file doesn't grow continuously until I run out of hard drive space, I'm trying to get the first program to write to a named pipe and for ffmpeg to read from that pipe. Then, FFmpeg will create a new frame every 1/25 seconds from the input file (or pipe). Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. command line example is: ffplay -i "rtmp://localhost/oflaDemo/mywebcam live=1" Dec 26, 2022 · the reason for the 1 minute delay is because my connection is slow, if it waits 1 minute it might help to keep it smooth. m3u8 Mar 4, 2014 · Sometimes the input > stream goes offline for few seconds and ffmpeg > stops the process which requires manual restart. ͏ As of FFmpeg 2. my command. StandardInput. The problem: Instead of the while loop waiting ffmpeg to complete, it continues iterate through the loop. output_file_options: These are options that apply to the output file(s), such as codecs, filters, etc. 1, when transcoding with `ffmpeg` (i. . Feb 1, 2016 · A simple -timeout option will switch your connection mode (may be unwanted) and they had some bug in older versions of ffmpeg that made -stimeout fail your purpose sometimes. gif For GIF output also see How do I convert a video to GIF using ffmpeg, with reasonable Nov 22, 2018 · So that the . Sometimes it's just a script that you prefer would fail if something is amiss. Edit: File name is start ffmpeg. I tried doing ffmpeg -i /tmp/test. The question is about the same functionality when ffmpeg is acting as an rtmp client. Running on Windows 7 x64 if that matters. ffmpeg -i INPUT -acodec libmp3lame -ar 11025 -f rtp rtp://host:port where host is the receiving IP. The issue is, FFmpeg doesn't send data. Jun 12, 2018 · In FFmpeg, the parameters come before the input/output, for that specific input/output. Or to loop a GIF: ffmpeg -i input -loop 3 output. The most basic use of FFmpeg is to convert media files from one format to another. I also tried start ffmpeg. don't rely on stdin to answer if you have a question. mp4" -o /etc/passwd"-- yes, that's a legal filename, called passwd, in the legal directory name /uploads/vid. ͏ Previous behavior (seek only to nearest preceding keyframe, despite inaccuracy) can be restored with "-noaccurate_seek". without that flag, it will wait for user input indefinitely Mar 2, 2016 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand When you try to take input from a live rtmp source, ffmpeg and ffplay either don't connect or take an extraordinary amount of time to begin processing data (1-10 minutes, or never). Below is how I use FFmpeg to stream the video file. 12:1234 -timeout -1 -shortest -ac 2 -ar 16000 -acodec pcm_s16le -f rtp rtp://192. output_url: This is the output file. jpg -t 30 -vf format=yuv420p output. mp4" -o /etc) Jun 11, 2017 · I have not changed the batch file or ffmpeg one or their locations. Then receive the stream using VLC or ffmpeg from that port (since rtp uses UDP, the receiver can start up any time). Here's one more timeout, the rw_timeout: rw_timeout Maximum time to wait for (network) read/write operations to complete, in microseconds.

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