ffmpeg
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ffmpeg [2023-04-24 22:37:01] mi [Extract single frames] |
ffmpeg [2025-03-20 19:39:18] (current) mi [Add pseudo-timecode] |
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| -maxrate 6M -bufsize 6M | -maxrate 6M -bufsize 6M | ||
| </code> | </code> | ||
| + | |||
| + | Or set an average bitrate, without using ''-crf'' (see [[https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate|Limiting the output bitrate]]) | ||
| + | |||
| + | |||
| + | <code bash> | ||
| + | -b:v 4M -maxrate 6M -bufsize 10M | ||
| + | </code> | ||
| + | |||
| ==prores | ==prores | ||
| * Prores proxy: -profile:v 0 | * Prores proxy: -profile:v 0 | ||
| Line 53: | Line 61: | ||
| -vf "scale=iw/2:-2" # same (half width and height), but height divisible by 2 | -vf "scale=iw/2:-2" # same (half width and height), but height divisible by 2 | ||
| etc. | etc. | ||
| + | </code> | ||
| + | |||
| + | ==Deinterlace | ||
| + | |||
| + | See https://ffmpeg.org/ffmpeg-filters.html#yadif : | ||
| + | |||
| + | > yadif=mode:parity:deint | ||
| + | > defaults: 0(send_frame=one frame for each frame) : -1(auto=auto detection of field order) : 0(all=all frames) | ||
| + | |||
| + | <code bash> | ||
| + | -vf "yadif=0:-1:0" | ||
| </code> | </code> | ||
| Line 115: | Line 134: | ||
| See also ffmpeg's [[https://trac.ffmpeg.org/wiki/Create%20a%20thumbnail%20image%20every%20X%20seconds%20of%20the%20video|Create a thumbnail image every X seconds of the video]]. | See also ffmpeg's [[https://trac.ffmpeg.org/wiki/Create%20a%20thumbnail%20image%20every%20X%20seconds%20of%20the%20video|Create a thumbnail image every X seconds of the video]]. | ||
| - | ==Animated webp | + | ==Images to video |
| + | |||
| + | With numbered frames, the numbering must start at 0: "frame0000.png", "frame0001.png", "frame0002.png", ... | ||
| + | ===Animated webp | ||
| Frames to animated .webp : | Frames to animated .webp : | ||
| Line 129: | Line 151: | ||
| ffmpeg -i my-animation.gif -c vp9 -b:v 0 -crf 41 my-animation.webm | ffmpeg -i my-animation.gif -c vp9 -b:v 0 -crf 41 my-animation.webm | ||
| </code> | </code> | ||
| + | |||
| + | ===Jpegs to mp4 | ||
| + | |||
| + | 1 .jpg image = 1 frame : | ||
| + | |||
| + | <code bash> | ||
| + | in="image%03d.jpg" # image000.jpg to image999.jpg | ||
| + | out="image-to-video.mp4" | ||
| + | ffmpeg -framerate 25 -i "$in" -c:v libx264 -crf 18 -pix_fmt yuv420p "$out" | ||
| + | </code> | ||
| + | |||
| + | To start on a specific numbered frame, use ''-start_number''. Example staring at "image150.jpg": | ||
| + | |||
| + | <code bash> | ||
| + | in="image%03d.jpg" # image000.jpg to image999.jpg | ||
| + | out="image-to-video.mp4" | ||
| + | ffmpeg -start_number 150 framerate 25 -i "$in" -c:v libx264 -crf 18 -pix_fmt yuv420p "$out" | ||
| + | </code> | ||
| + | |||
| + | Slideshow with 1 .jpg = 1 second : | ||
| + | |||
| + | <code bash> | ||
| + | fps=25 | ||
| + | out="slideshow-glob.mp4" | ||
| + | ffmpeg -framerate 1 -pattern_type glob -i '*.jpeg' -c:v libx264 -crf 20 -g $fps -pix_fmt yuv420p -r $fps "$out" | ||
| + | </code> | ||
| + | |||
| + | If the size of the frames is uneven (eg. 512x459), it needs to be set to an even size, or there will be this error: | ||
| + | |||
| + | > ''height not divisible by 2 (512x459)'' | ||
| + | > ''Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height'' | ||
| + | |||
| + | In this case, specify the size. For example: ''-s 512x460'' | ||
| + | |||
| ==Audio | ==Audio | ||
| Line 199: | Line 255: | ||
| for t in {0..11}; do ffmpeg -nostats -i "$in" -map 0:a:$t -filter_complex ebur128 -f null - > $(printf "ebur-$in-a%02d.txt" $t) 2>&1 ; done | for t in {0..11}; do ffmpeg -nostats -i "$in" -map 0:a:$t -filter_complex ebur128 -f null - > $(printf "ebur-$in-a%02d.txt" $t) 2>&1 ; done | ||
| + | |||
| + | |||
| + | ==Delay track | ||
| + | To add a delay to the start of an input, use ''-itsoffset offset'' before the input file. | ||
| + | |||
| + | See [[https://superuser.com/a/983153/53547|this answer]] for [[https://superuser.com/questions/982342/|In ffmpeg, how to delay only the audio of a .mp4 video without converting the audio?]] | ||
| + | |||
| + | For example, to merge an audio and a video file, but having the audio start 440 ms. later (11 frames at 25 fps): | ||
| + | |||
| + | ffmpeg -i "$video_file" -itsoffset 0.440 -i "$audio_file" -map 0:v -map 1:a -c copy "ff-resync-video_audio.mp4" | ||
| + | ===Syntax for time duration | ||
| + | ''[-][HH:]MM:SS[.m...]'' or ''[-]S+[.m...][s|ms|us]'' | ||
| + | See https://ffmpeg.org/ffmpeg-utils.html#time-duration-syntax | ||
| Line 217: | Line 286: | ||
| - | == Add pseudo-timecode | + | == Timecode |
| + | === Change existing timecode | ||
| + | |||
| + | f=OriginalFile.mxf | ||
| + | newtc="00:00:00:00" | ||
| + | out=NewTC_File.mxf | ||
| + | ffmpeg -i "$f" -map 0:v -map 0:a -codec copy -movflags use_metadata_tags -timecode "$newtc" "$out" | ||
| + | |||
| + | === Add pseudo-timecode | ||
| Example with Fuji .MOV files, to add the "Create Date" time as a timecode: | Example with Fuji .MOV files, to add the "Create Date" time as a timecode: | ||
| Line 244: | Line 321: | ||
| done | done | ||
| </code> | </code> | ||
| + | |||
| + | If the exiftool command gives the error "End of processing at large atom (LargeFileSupport not enabled)", add the ''-api largefilesupport=1'' option so the exiftool line becomes: | ||
| + | |||
| + | <code bash>t=$(exiftool -api largefilesupport=1 -CreateDate "$f" | awk '{print $NF}');</code> | ||
| + | |||
| + | For .wav files from a Zoom, instead of ''-CreateDate'', use ''-DateTimeOriginal'' : | ||
| + | <code bash>t=$(exiftool -DateTimeOriginal "$f" | awk '{print $NF}'); tc="$t:00";</code> | ||
| ==Diff | ==Diff | ||
| Line 277: | Line 361: | ||
| $ ffmpeg -i "$filename" -map 0:a -codec copy -hide_banner -loglevel warning -f md5 - | $ ffmpeg -i "$filename" -map 0:a -codec copy -hide_banner -loglevel warning -f md5 - | ||
| - | $ ffmpeg -i input.mp4 -map 0 -c copy -f streamhash -hash md5 - | + | $ ffmpeg -i "$filename" -map 0 -c copy -f streamhash -hash md5 - |
| ... | ... | ||
| 0,v,MD5=50224fec84bc6dfde90d742bcf1d2e01 | 0,v,MD5=50224fec84bc6dfde90d742bcf1d2e01 | ||
| 1,a,MD5=1d2a32ed72798d66e0110bd02df2be65 | 1,a,MD5=1d2a32ed72798d66e0110bd02df2be65 | ||
| + | |||
| + | $ ffmpeg -i "$f" -map 0 -c copy -f streamhash -hash md5 "$f.stream.md5" | ||
| See also: | See also: | ||
| Line 297: | Line 383: | ||
| # or | # or | ||
| -hide_banner -loglevel info -stats</code> | -hide_banner -loglevel info -stats</code> | ||
| + | |||
| + | ===Edit metadata=== | ||
| + | |||
| + | See [[https://superuser.com/questions/834244/how-do-i-name-an-audio-track-with-ffmpeg/835069|How do I name an audio track with ffmpeg]]: | ||
| + | |||
| + | ffmpeg -i input.mp4 -map 0 -c copy -metadata:s:a:0 title="One" -metadata:s:a:1 title="Two" -metadata:s:a:0 language=eng -metadata:s:a:1 language=spa output.mp4 | ||
| ==Examples | ==Examples | ||
/docs/dokuwiki/data/attic/ffmpeg.1682368621.txt.gz · Last modified: 2023-04-24 22:37:01 by mi
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