At its basis, an FFmpeg command is relatively simple. After you have installed FFmpeg (see instructions here), the program is invoked simply by typing ffmpeg at the command prompt.
ffmpeg
Subsequently, each instruction that you supply to FFmpeg is actually a pair: a flag, which designates the type of action you want to carry out; and then the specifics of that action. Flags are always prepended with a hyphen.
For example, in the instruction -i input_file.ext, the -i flag tells FFmpeg that you are supplying an input file, and input_file.ext states which file it is.
-i input_file.ext
-i
input_file.ext
Many FFmpeg commands use filters that manipulate the video or audio stream in some way: for example, hflip to horizontally flip a video, or amerge to merge two or more audio tracks into a single stream.
The use of a filter is signalled by the flag -vf (video filter) or -af (audio filter), followed by the name and options of the filter itself. For example, take the convert colourspace command:
-vf
-af
ffmpeg -i input_file -c:v libx264 -vf colormatrix=src:dst output_file @@ -116,6 +113,7 @@
ffmpeg -i input_file -c:v libx264 -vf colormatrix=src:dst output_file
For more information, check out the FFmpeg wiki Filtering Guide.
ffmpeg -i input_file.ext -c copy -map 0 output_file.ext
This script will rewrap a video file. It will create a new video video file where the inner content (the video, audio, and subtitle data) of the original file is unchanged, but these streams are rehoused within a different container format.
Note: rewrapping is also known as remuxing, short for re-multiplexing.
It may not be possible to rewrap a file's contents to a new container without re-encoding one or more of the streams within (that is, the video, audio, and subtitle tracks). Some containers can only contain streams of a certain encoding type: for example, the .mp4 container does not support uncompressed audio tracks. (In practice .mp4 goes hand-in-hand with a H.264-encoded video stream and an AAC-encoded video stream, although other types of video and audio streams are possible). Another example is that the Matroska container does not allow data tracks; see the MKV to MP4 recipe.
In such cases, FFmpeg will throw an error. If you encounter errors of this kind, you may wish to consult the list of transcoding recipes.
ffmpeg -i input_file.mkv -c:v copy -c:a aac output_file.mp4
This will convert your Matroska (MKV) files to MP4 files.
.mp4
ffmpeg -i input_file -c:v prores -profile:v 1 -vf yadif -c:a pcm_s16le output_file.mov
This command transcodes an input file into a deinterlaced Apple ProRes 422 LT file with 16-bit linear PCM encoded audio. The file is deinterlaced using the yadif filter (Yet Another De-Interlacing Filter).
prores
prores_ks
-c:v prores_ks -profile:v 4
ffmpeg -i input_file -c:v libx264 -pix_fmt yuv420p -c:a copy output_file
This command takes an input file and transcodes it to H.264 with an .mp4 wrapper, keeping the audio the same codec as the original. The libx264 codec defaults to a “medium” preset for compression quality and a CRF of 23. CRF stands for constant rate factor and determines the quality and file size of the resulting H.264 video. A low CRF means high quality and large file size; a high CRF means the opposite.
libx264
For more information, see the FFmpeg and H.264 Encoding Guide on the FFmpeg wiki.
ffmpeg -i input_video_file.mxf -i input_audio_file.mxf -c:v libx264 -pix_fmt yuv420p -c:a aac output_file.mp4
This will transcode MXF wrapped video and audio files to an H.264 encoded MP4 file. Please note this only works for unencrypted, single reel DCPs.
ffmpeg -i input_file -map 0 -dn -c:v ffv1 -level 3 -g 1 -slicecrc 1 -slices 16 -c:a copy output_file.mkv -f framemd5 -an framemd5_output_file
This will losslessly transcode your video with the FFV1 Version 3 codec in a Matroska container. In order to verify losslessness, a framemd5 of the source video is also generated. For more information on FFV1 encoding, try the FFmpeg wiki.
ffmpeg -i concat:input_file1\|input_file2\|input_file3 -c:v libx264 -c:a copy output_file.mp4
This command allows you to create an H.264 file from a DVD source that is not copy-protected.
Before encoding, you’ll need to establish which of the .VOB files on the DVD or .iso contain the content that you wish to encode. Inside the VIDEO_TS directory, you will see a series of files with names like VTS_01_0.VOB, VTS_01_1.VOB, etc. Some of the .VOB files will contain menus, special features, etc, so locate the ones that contain target content by playing them back in VLC.
ffmpeg -i input_file -c:v libx265 -pix_fmt yuv420p -c:a copy output_file
This command takes an input file and transcodes it to H.265/HEVC in an .mp4 wrapper, keeping the audio codec the same as in the original file.
Note: FFmpeg must be compiled with libx265, the library of the H.265 codec, for this script to work. (Add the flag --with-x265 if using the brew install ffmpeg method).
--with-x265
brew install ffmpeg
ffmpeg -i input_file.wav -write_id3v1 1 -id3v2_version 3 -dither_method rectangular -out_sample_rate 48k -qscale:a 1 output_file.mp3
This will convert your WAV files to MP3s.
A couple notes
ffmpeg -i input_file -i input_file_to_append -filter_complex "[0:a:0]asplit=2[a][b];[b]afifo[bb];[1:a:0][bb]concat=n=2:v=0:a=1[concatout]" -map "[a]" -codec:a libmp3lame -dither_method modified_e_weighted -qscale:a 2 output_file.mp3 -map "[concatout]" -codec:a libmp3lame -dither_method modified_e_weighted -qscale:a 2 output_file_appended.mp3
This script allows you to generate two derivative audio files from a master while appending audio from a separate file (for example a copyright or institutional notice) to one of them.
ffmpeg -i input_file.wav -c:a aac -b:a 128k -dither_method rectangular -ar 44100 output_file.mp4
This will convert your WAV file to AAC/MP4.
A note about dither methods. FFmpeg comes with a variety of dither algorithms, outlined in the official docs, though some may lead to unintended, not-subtle digital clipping on some systems.
Transform a video file with 4:3 aspect ratio into a video file with 16:9 aspect ratio by correct pillarboxing.
ffmpeg -i input_file -filter:v "pad=ih*16/9:ih:(ow-iw)/2:(oh-ih)/2" -c:a copy output_file
-c:a copy
-an
Transform a video file with 16:9 aspect ratio into a video file with 4:3 aspect ratio by correct letterboxing.
ffmpeg -i input_file -filter:v "pad=iw:iw*3/4:(ow-iw)/2:(oh-ih)/2" -c:a copy output_file
ffmpeg -i input_file -filter:v "hflip,vflip" -c:a copy output_file
Transform a SD video file with 4:3 aspect ratio into an HD video file with 16:9 aspect ratio by correct pillarboxing.
ffmpeg -i input_file -filter:v "colormatrix=bt601:bt709, scale=1440:1080:flags=lanczos, pad=1920:1080:240:0" -c:a copy output_file
ffmpeg -i input_file -c:v copy -aspect 4:3 output_file
4:3
16:9
-c:v copy
This command uses a filter to convert the video to a different colour space.
1. Out of step with the regular pattern, -color_trc doesn’t accept bt470bg; it is instead here referred to directly as gamma. In the Rec.601 standard, 525-line/NTSC and 625-line/PAL video have assumed gammas of 2.2 and 2.8 respectively. ↩
-color_trc
bt470bg
E.g. for converting 24fps to 25fps with audio pitch compensation for PAL access copies. (Thanks @kieranjol!)
ffmpeg -i input_file -filter_complex "[0:v]setpts=input_fps/output_fps*PTS[v]; [0:a]atempo=output_fps/input_fps[a]" -map "[v]" -map "[a]" output_file
These examples use QuickTime inputs and outputs. The strategy will vary or may not be possible in other file formats. In the case of these examples it is the intention to make a lossless copy while clarifying an unknown characteristic of the stream.
ffprobe input_file -show_streams
The possible values for -color_primaries, -color_trc, and -field_order are given in the Codec Options section of the FFmpeg docs - scroll down to near the bottom of the section.
-color_primaries
-field_order
ffmpeg -i input_file -c:a copy -vn output_file
This command extracts the audio stream without loss from an audiovisual file.
ffmpeg -i input_file -filter_complex "[0:a:0][0:a:1]amerge[out]" -map 0:v -map "[out]" -c:v copy -shortest output_file
This command combines two audio tracks present in a video file into one stream. It can be useful in situations where a downstream process, like YouTube’s automatic captioning, expect one audio track. To ensure that you’re mapping the right audio tracks run ffprobe before writing the script to identify which tracks are desired. More than two audio streams can be combined by extending the pattern present in the -filter_complex option.
ffmpeg -i input_file -af pan="stereo|c0=c0|c1=-1*c1" output_file
This command inverses the audio phase of the second channel by rotating it 180°.
ffmpeg -i input_file -af loudnorm=print_format=json -f null -
This filter calculates and outputs loudness information in json about an input file (labeled input) as well as what the levels would be if loudnorm were applied in its one pass mode (labeled output). The values generated can be used as inputs for a 'second pass' of the loudnorm filter allowing more accurate loudness normalization than if it is used in a single pass.
These instructions use the loudnorm defaults, which align well with PBS recommendations for target loudness. More information can be found at the loudnorm documentation.
print_format=summary
ffmpeg -i input_file -af aemphasis=type=riaa output_file
This will apply RIAA equalization to an input file allowing correct listening of audio transferred 'flat' (without EQ) from records that used this EQ curve. For more information about RIAA equalization see the Wikipedia page on the subject.
ffmpeg -i input_file -af loudnorm=dual_mono=true -ar 48k output_file
This will normalize the loudness of an input using one pass, which is quicker but less accurate than using two passes. This command uses the loudnorm filter defaults for target loudness. These defaults align well with PBS recommendations, but loudnorm does allow targeting of specific loudness levels. More information can be found at the loudnorm documentation.
Information about PBS loudness standards can be found in the PBS Technical Operating Specifications document. Information about EBU loudness standards can be found in the EBU R 128 recommendation document.
ffmpeg -i input_file -af loudnorm=dual_mono=true:measured_I=input_i:measured_TP=input_tp:measured_LRA=input_lra:measured_thresh=input_thresh:offset=target_offset:linear=true -ar 48k output_file
This command allows using the levels calculated using a first pass of the loudnorm filter to more accurately normalize loudness. This command uses the loudnorm filter defaults for target loudness. These defaults align well with PBS recommendations, but loudnorm does allow targeting of specific loudness levels. More information can be found at the loudnorm documentation.
ffmpeg -i input_file -c:v copy -c:a pcm_s16le -af "aresample=async=1000" output_file
ffmpeg -f concat -i mylist.txt -c copy output_file
This command takes two or more files of the same file type and joins them together to make a single file. All that the program needs is a text file with a list specifying the files that should be joined. However, it only works properly if the files to be combined have the exact same codec and technical specifications. Be careful, FFmpeg may appear to have successfully joined two video files with different codecs, but may only bring over the audio from the second file or have other weird behaviors. Don’t use this command for joining files with different codecs and technical specs and always preview your resulting video file!
For more information, see the FFmpeg wiki page on concatenating files.
ffmpeg -i input_file -c copy -map 0 -f segment -segment_time 60 -reset_timestamps 1 output_file-%03d.mkv
ffmpeg -i input_file -ss 00:02:00 -to 00:55:00 -c copy -map 0 output_file
This command allows you to create an excerpt from a video file without re-encoding the image data.
Note: In order to keep the original timestamps, without trying to sanitise them, you may add the -copyts option.
-copyts
ffmpeg -i input_file -t 5 -c copy -map 0 output_file
This command captures a certain portion of a video file, starting from the beginning and continuing for the amount of time (in seconds) specified in the script. This can be used to create a preview file, or to remove unwanted content from the end of the file. To be more specific, use timecode, such as 00:00:05.
ffmpeg -i input_file -ss 5 -c copy -map 0 output_file
This command copies a video file starting from a specified time, removing the first few seconds from the output. This can be used to create an excerpt, or remove unwanted content from the beginning of a video file.
ffmpeg -sseof -5 -i input_file -c copy -map 0 output_file
This command copies a video file starting from a specified time before the end of the file, removing everything before from the output. This can be used to create an excerpt, or extract content from the end of a video file (e.g. for extracting the closing credits).
ffmpeg -i input_file -c:v libx264 -filter:v "yadif, scale=1440:1080:flags=lanczos, pad=1920:1080:(ow-iw)/2:(oh-ih)/2, format=yuv420p" output_file
Note: the very same scaling filter also downscales a bigger image size into HD.
ffmpeg -i input_file -c:v libx264 -vf "yadif,format=yuv420p" output_file
This command takes an interlaced input file and outputs a deinterlaced H.264 MP4.
ffmpeg -i input_file -c:v libx264 -vf "fieldmatch,yadif,decimate" output_file
The inverse telecine procedure reverses the 3:2 pull down process, restoring 29.97fps interlaced video to the 24fps frame rate of the original film source.
ffmpeg -i input_file -c:v video_codec -filter:v setfield=tff output_file
-c copy
ffv1
v210
ffmpeg -i input file -filter:v idet -f null -
null
-
E.g For creating access copies with your institutions name
ffmpeg -i input_file -vf drawtext="fontfile=font_path:fontsize=font_size:text=watermark_text:fontcolor=font_colour:alpha=0.4:x=(w-text_w)/2:y=(h-text_h)/2" output_file
-filter:v
ffmpeg -i input_video file -i input_image_file -filter_complex overlay=main_w-overlay_w-5:5 output_file
main_w-overlay_w-5:5
ffmpeg -i input_file -vf drawtext="fontfile=font_path:fontsize=font_size:timecode=starting_timecode:fontcolor=font_colour:box=1:boxcolor=box_colour:rate=timecode_rate:x=(w-text_w)/2:y=h/1.2" output_file
Note: -vf is a shortcut for -filter:v.
ffmpeg -i input_file -ss 00:00:20 -vframes 1 thumb.png
This command will grab a thumbnail 20 seconds into the video.
ffmpeg -i input_file -vf fps=1/60 out%d.png
This will grab a thumbnail every minute and output sequential png files.
ffmpeg -f image2 -framerate 9 -pattern_type glob -i "input_image_*.jpg" -vf scale=250x250 output_file.gif
This will convert a series of image files into a GIF.
Create high quality GIF
ffmpeg -ss HH:MM:SS -i input_file -filter_complex "fps=10,scale=500:-1:flags=lanczos,palettegen" -t 3 palette.png
ffmpeg -ss HH:MM:SS -i input_file -i palette.png -filter_complex "[0:v]fps=10, scale=500:-1:flags=lanczos[v], [v][1:v]paletteuse" -t 3 -loop 6 output_file
Simpler GIF creation
ffmpeg -ss HH:MM:SS -i input_file -vf "fps=10,scale=500:-1" -t 3 -loop 6 output_file
This is a quick and easy method. Dithering is more apparent than the above method using the palette filters, but the file size will be smaller. Perfect for that “legacy” GIF look.
ffmpeg -f image2 -framerate 24 -i input_file_%06d.ext -c:v v210 output_file
ffmpeg -r 1 -loop 1 -i image_file -i audio_file -acodec copy -shortest -vf scale=1280:720 output_file
This command will take an image file (e.g. image.jpg) and an audio file (e.g. audio.mp3) and combine them into a video file that contains the audio track with the image used as the video. It can be useful in a situation where you might want to upload an audio file to a platform like YouTube. You may want to adjust the scaling with -vf to suit your needs.
ffplay -f lavfi "amovie=input_file, asplit=2[out1][a], [a]abitscope=colors=purple|yellow[out0]"
This filter allows visual analysis of the information held in various bit depths of an audio stream. This can aid with identifying when a file that is nominally of a higher bit depth actually has been 'padded' with null information. The provided GIF shows a 16 bit WAV file (left) and then the results of converting that same WAV to 32 bit (right). Note that in the 32 bit version, there is still only information in the first 16 bits.
ffplay -f lavfi "amovie='input.mp3', astats=metadata=1:reset=1, adrawgraph=lavfi.astats.Overall.Peak_level:max=0:min=-30.0:size=700x256:bg=Black[out]"
ffplay -f lavfi "movie='input.mp4', signalstats=out=brng:color=cyan[out]"
ffplay input_file -vf "split=2[m][v], [v]vectorscope=b=0.7:m=color3:g=green[v], [m][v]overlay=x=W-w:y=H-h"
ffmpeg -i input01 -i input02 -filter_complex "[0:v:0]tblend=all_mode=difference128[a];[1:v:0]tblend=all_mode=difference128[b];[a][b]hstack[out]" -map [out] -f nut -c:v rawvideo - | ffplay -
ffprobe -i input_file -show_format -show_streams -show_data -print_format xml
This command extracts technical metadata from a video file and displays it in xml.
See also the FFmpeg documentation on ffprobe for a full list of flags, commands, and options.
ffmpeg -i input_file -map_metadata -1 -c:v copy -c:a copy output_file
Bash scripts are plain text files saved with a .sh extension. This entry explains how they work with the example of a bash script named “Rewrap-MXF.sh”, which rewraps .mxf files in a given directory to .mov files.
“Rewrap-MXF.sh” contains the following text:
for file in *.mxf; do ffmpeg -i "$file" -map 0 -c copy "${file%.mxf}.mov"; done
e.g., if an input file is bestmovie002.avi, its output will be bestmovie002_suffix.avi.
Variation: recursively process all MXF files in subdirectories using find instead of for:
find
for
find input_directory -iname "*.mxf" -exec ffmpeg -i {} -map 0 -c copy {}.mov \;
As of Windows 10, it is possible to run Bash via Bash on Ubuntu on Windows, allowing you to use bash scripting. To enable Bash on Windows, see these instructions.
On Windows, the primary native command line programme is PowerShell. PowerShell scripts are plain text files saved with a .ps1 extension. This entry explains how they work with the example of a PowerShell script named “rewrap-mp4.ps1”, which rewraps .mp4 files in a given directory to .mkv files.
“rewrap-mp4.ps1” contains the following text:
Note: the PowerShell script (.ps1 file) and all .mp4 files to be rewrapped must be contained within the same directory, and the script must be run from that directory.
Execute the .ps1 file by typing .\rewrap-mp4.ps1 in PowerShell.
.\rewrap-mp4.ps1
Modify the script as needed to perform different transcodes, or to use with ffprobe. :)
ffmpeg -i input_file -f framemd5 -an output_file
This will create an MD5 checksum per video frame.
You may verify an MD5 checksum file created this way by using a Bash script.
ffmpeg -i input_file -af "asetnsamples=n=48000" -f framemd5 -vn output_file
This will create an MD5 checksum for each group of 48000 audio samples. The number of samples per group can be set arbitrarily, but it's good practice to match the samplerate of the media file (so you will get one checksum per second).
ffprobe -f lavfi -i "movie=input_file:s=v+a[in0][in1], [in0]signalstats=stat=tout+vrep+brng, cropdetect=reset=1:round=1, idet=half_life=1, split[a][b];[a]field=top[a1];[b]field=bottom, split[b1][b2];[a1][b1]psnr[c1];[c1][b2]ssim[out0];[in1]ebur128=metadata=1, astats=metadata=1:reset=1:length=0.4[out1]" -show_frames -show_versions -of xml=x=1:q=1 -noprivate | gzip > input_file.qctools.xml.gz
This will create an XML report for use in QCTools for a video file with one video track and one audio track. See also the QCTools documentation.
>
ffprobe -f lavfi -i "movie=input_file,signalstats=stat=tout+vrep+brng, cropdetect=reset=1:round=1, idet=half_life=1, split[a][b];[a]field=top[a1];[b]field=bottom,split[b1][b2];[a1][b1]psnr[c1];[c1][b2]ssim" -show_frames -show_versions -of xml=x=1:q=1 -noprivate | gzip > input_file.qctools.xml.gz
This will create an XML report for use in QCTools for a video file with one video track and NO audio track. See also the QCTools documentation.
ffmpeg -report -i input_file -f null -
This decodes your video and displays any CRC checksum mismatches. These errors will display in your terminal like this: [ffv1 @ 0x1b04660] CRC mismatch 350FBD8A!at 0.272000 seconds
[ffv1 @ 0x1b04660] CRC mismatch 350FBD8A!at 0.272000 seconds
Frame crcs are enabled by default in FFV1 Version 3.
ffprobe -f lavfi -i movie=input_file,readeia608 -show_entries frame=pkt_pts_time:frame_tags=lavfi.readeia608.0.line,lavfi.readeia608.0.cc,lavfi.readeia608.1.line,lavfi.readeia608.1.cc -of csv > input_file.csv
This command uses FFmpeg's readeia608 filter to extract the hexadecimal values hidden within EIA-608 (Line 21) Closed Captioning, outputting a csv file. For more information about EIA-608, check out Adobe's Introduction to Closed Captions.
If hex isn't your thing, closed captioning character and code sets can be found in the documentation for SCTools.
Side-by-side video with true EIA-608 captions on the left, zoomed in view of the captions on the right (with hex values represented). To achieve something similar with your own captioned video, try out the EIA608/VITC viewer in QCTools.
ffmpeg -f lavfi -i mandelbrot=size=1280x720:rate=25 -c:v libx264 -t 10 output_file
ffmpeg -f lavfi -i smptebars=size=720x576:rate=25 -c:v prores -t 10 output_file
ffmpeg -f lavfi -i testsrc=size=720x576:rate=25 -c:v v210 -t 10 output_file
Test an HD video projector by playing the SMPTE colour bars pattern.
ffplay -f lavfi -i smptehdbars=size=1920x1080
Test a VGA (SD) video projector by playing the SMPTE colour bars pattern.
ffplay -f lavfi -i smptebars=size=640x480
Generate a test audio file playing a sine wave.
ffmpeg -f lavfi -i "sine=frequency=1000:sample_rate=48000:duration=5" -c:a pcm_s16le output_file.wav
pcm_s16le
16
le
Generate a SMPTE bars test video + a 1kHz sine wave as audio testsignal.
ffmpeg -f lavfi -i smptebars=size=720x576:rate=25 -f lavfi -i "sine=frequency=1000:sample_rate=48000" -c:a pcm_s16le -t 10 -c:v ffv1 output_file
Modifies an existing, functioning file and intentionally breaks it for testing purposes.
ffmpeg -i input_file -bsf noise=1 -c copy output_file
Note: ffmpeg must be compiled with the tesseract library for this script to work (--with-tesseract if using the brew install ffmpeg method).
--with-tesseract
ffplay input_file -vf "ocr,drawtext=fontfile=/Library/Fonts/Andale Mono.ttf:text=%{metadata\\\:lavfi.ocr.text}:fontcolor=white"
Note: FFmpeg must be compiled with the tesseract library for this script to work (--with-tesseract if using the brew install ffmpeg method)
ffprobe -show_entries frame_tags=lavfi.ocr.text -f lavfi -i "movie=input_file,ocr"
ffmpeg -i input_one -i input_two -filter_complex signature=detectmode=full:nb_inputs=2 -f null -
ffmpeg -i input -vf signature=format=xml:filename="output.xml" -an -f null -
Play an image sequence directly as moving images, without having to create a video first.
ffplay -framerate 5 input_file_%06d.ext
Notes:
If -framerate is omitted, the playback speed depends on the images’ file sizes and on the computer’s processing power. It may be rather slow for large image files.
-framerate
You can navigate durationally by clicking within the playback window. Clicking towards the left-hand side of the playback window takes you towards the beginning of the playback sequence; clicking towards the right takes you towards the end of the sequence.
ffmpeg -i input_file -map 0:v:0 video_output_file -map 0:a:0 audio_output_file
This command splits the original input file into a video and audio stream. The -map command identifies which streams are mapped to which file. To ensure that you’re mapping the right streams to the right file, run ffprobe before writing the script to identify which streams are desired.
Create an ISO file that can be used to burn a DVD. Please note, you will have to install dvdauthor. To install dvd author using Homebrew run: brew install dvdauthor
brew install dvdauthor
ffmpeg -i input_file -aspect 4:3 -target ntsc-dvd output_file.mpg
This command will take any file and create an MPEG file that dvdauthor can use to create an ISO.
.mpg
ffprobe -f lavfi -i movie=input_file,signalstats -show_entries frame=pkt_pts_time:frame_tags=lavfi.signalstats.YDIF -of csv
This ffprobe command prints a CSV correlating timestamps and their YDIF values, useful for determining cuts.
pkt_pts_time
-of
-print_format
ffmpeg -i input_file -filter:v drawbox=w=iw:h=7:y=ih-h:t=max output_file
This command will draw a black box over a small area of the bottom of the frame, which can be used to cover up head switching noise.
ffmpeg -re -i ${INPUTFILE} -map 0 -flags +global_header -vf scale="1280:-1,format=yuv420p" -pix_fmt yuv420p -level 3.1 -vsync passthrough -crf 26 -g 50 -bufsize 3500k -maxrate 1800k -c:v libx264 -c:a aac -b:a 128000 -r:a 44100 -ac 2 -t ${STREAMDURATION} -f tee "[movflags=+faststart]${TARGETFILE}|[f=flv]${STREAMTARGET}"
I use this script to stream to a RTMP target and record the stream locally as .mp4 with only one ffmpeg-instance.
As input, I use bmdcapture which is piped to ffmpeg. But it can also be used with a static videofile as input.
bmdcapture
ffmpeg -h type=name
ffmpeg -i input_file *****code goes here***** output_file
This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info! This is all about info!