Ffmpeg drop duplicate frames But if the duplicate was a dropped frame, then interpolating a new frame at the duplicate location would likely be the correct approach for 30fps . mkv) at 25 fps, but every 24th frame is a duplicate of frame 23. Recently, I encountered a situation where FFMPEG dropped the first two frames of a source video when encoding it. 4" -c:v libx264 -y Spider4k60. But surprisingly first frame is duplicated only while transcoding input video with 23. Follow edited yesterday. -vsync 0 suppresses the frame duplication/drop but timing adjustment has to be done manually using setpts filter. So that if I have 20 corrupted frames at the start of a video - they will be replaced with 21st good one. The mpdecimate filter helps to eliminate duplicate frames. 9kbits/s dup=35 drop=0 speed=0. txt -y -fps_mode vfr ProductionVideo. 背景. To keep 1:1 correspondence between input and output frames, add -fps_mode passthrough. I wonder if that's possible to do and if I should continue trying with this approach. I do not care about timestamps, I want a file with all of the input frames at a fixed (higher) frame rate. png -c:v libx264 -r 30 out. 41 bitrate=N/A dup=1 drop=0 speed=11. If I remove frame-dup=1, the video encodes normally just without frame duplication (2). 文章浏览阅读1. Carl Eugen. x版本命令行解码后出现drop或者dup也就是丢帧和多帧的现象，追踪了一下发现是输入视频pts和dts有问题。有个专业属于是：插帧算法因为实际视频中，有变帧率视频通过追踪代码发现是ffmpeg. (assuming you passed in A frame is a candidate for dropping if no 8x8 blocks differ by more than a threshold of hi, and if no more than frac blocks (1 meaning the whole image) differ by more than a threshold of lo. Frames 6-9 are unique and 10 is a duplicate of 9. 2. ts there is no help with frame_drop_threshold attribude, no sample usage found on internet; does not reencode input; does not remove several seconds repeated frames block; Seems ffmpeg helps: just with sequence of same frames FFmpeg duplicates 1st frame, while "Final Cut Pro", "Adobe Premiere CC", "avconv" display only 1 frame with 00:00:00:00 BITC frame= 10 fps=0. Without re-encoding we can only cut the video in I frames which are also key frames. 98 (or more common 23. The timing of the duplicated frames is not entirely consistent, so simply removing every nth frame is not possible. gyan. This will tell you what the framerate SHOULD be. But when I'm just talking during a slide those duplicate frames are dropped. To review, open the file in an editor that reveals hidden Unicode characters. – llogan. Getting 591 frames into a 600 frame requested encoding. 84 bitrate=33727. ffmpeg -i input. Any ideas how to convert it with ffmpeg and keep the audio and video synced? Thanks. FFmpeg duplicates or drops frames when the input and output framerates differ. Removes duplicate frames from video using ffmpeg. Improve this answer. This can be useful in a variety of scenarios, such as reducing file size, removing camera shake, or removing If one wants 24fps with 48 plots per second ("fast forward"), ffmpeg will drop frames. . FFmpeg is a free, open-source command-line program known for its extensive video editing capabilities. 2GB) and no messages By default, the fps_mode is auto, so it may change your fps automatically. rickmakes. It is denoted with the special [D] tag in the status bar, indicating it is a null/drop frame. Go to the "Quick Settings" section to choose 1 or 2 from the drop-down menu of the "De-Duplication I have a video (file name is ben. I think it's also possible to have it remove duplicates as part of a transcode operation ffmpeg -i input. I want to remove duplicate frames This powerful command-line tool can remove duplicate frames and increase the speed of a video without losing its essence. As you can read from subsequent posts there, the developer of Hybrid, Selur, narrowed the problem down to FFMPEG. mp4 -r 30 -y output. A detailed explanation of how the fps filter in ffmpeg Learn how to use the FFmpeg MPDecimate filter to remove duplicate frames and optimize video compression. I used ffmpeg to convert the frames to png and I stepped through them one-by-one and found out that 1 in 5 frames is a duplicate and that pattern is followed perfectly from start to finish. 01:max=3 -r 60 -fps_mode cfr -frame_drop_threshold -2 -map 0 -c copy -c:v h264_nvenc -b:v 400M -preset p7 output. 976, it should drop the duplicates in my The only way I got it working is ffmpeg -r 10 -i video. I tried re-encoding the audio track with -acodec pcm_s16le and streaming without -re. 94 and 29. 0 Lsize=N/A time=00:00:00. 0. ts video from a capture device. Discover the power of the mpdecimate and setpts filters to remove duplicate frames and increase playback speed respectively. The advantage of frame metadata is that frame metadata can be picked up by ffprobe and thus you can export frame metadata in various machine readable formats, including json - as well as with frame numbers. Share. A frame may be based off previous N frames, however there are certain frames (key frame?) that don't depend on previous frames or there is sufficient data from a previous frame to complete the current frame. I asked this yesterday but it was incorrectly closed as a dupe of question:Reduce video frame rate without dropping useful frames The difference between that question and this question is - in that question the user has a video that was, via software, upscaled from a low framerate to a higher one, and they want to bring it back down. You can use the mpdecimate filter to achieve this. 5 fps. I didn't expect fast fix for this bug, but since its an expected behavior and ffmpeg -loglevel level+debug -i input -vf mpdecimate -an -sn -dn -f null - 2>&1 | grep -e Parsed_mpdecimate | grep -e drop_count. The following work, but only when re-encoding: ffmpeg -r 1000 -i input. Some frames will now be shown for longer than others, which is kind of what you described in your Using -r 25 as output argument, duplicates frames. And it's different than the other type of dropped frame where you may have something like 0,1,1,2,3,5. losslessly) Summary of the bug: I have a . Learn more about bidirectional Unicode characters Video notes: https://www. For vlc, any Extracting number of duplicate (or dropped) frames in ffmpeg via C API. Programmatically detect 'packed B-frames' AVI files. 6 and it worked well, it only failed when copying the video stream. removeduplicateframes. avi But not works properly. Note that with -r ffmpeg will simply drop or duplicate frames to your reach your desired value. Doesn't work. mp4 -vf mpdecimate -vsync vfr output. 4) I get about one dropped and one duplicated frame per second. mov even though that is the correct fraction (60/25=2. The X frames have zero changes, so it only takes a few bytes to encode each one. 264 streams there are I frames, P frames and B frames. e. Code:-vf decimate=cycle=3. 0 size= 7076608kB time=00:28:38. If r is specified as an input switch, ffmpeg will duplicate or drop frames as necessary to feed the specified number of frames per second of input to the filter/encoder. I also tried multiple other solutions and none of them seem to work. I'm using the following add ons to the output -r 60 -vsync . 01),st(1,t),lte(t Yes, I need to find the real frame rate of the original video, because repeated frames will affect the AI's effect of increasing the frame rate. 1,117 12 12 Using ffmpeg to drop duplicate frames but the first dup breaks the pattern + Reply to Thread. 33. It is used to remove duplicate or near-duplicate frames from a video file. avi -vsync 0 output. 98) should be recorded at a real-time constant FPS, 100FPS in this case. I used the mpdecimate filter in ffmpeg By default, the fps_mode is auto, so it may change your fps automatically. This works and doesn't drop or duplicate any frames. com/ffmpeg-remove-duplicate-frames-with-mpdecimate-while-retaining-audio/FFmpeg Installation Links: https://www. mp4 correctly makes a 30fps video with no dropped frames. I run ffmpeg -i . 13 bitrate= 2. I really want those frames to be deleted from the count. Summary of the bug: I have a . MP3s don't have indices, so ffmpeg estimates duration via bitrate. Resulting in duplicate frames from either mismatched fields or a failure to apply a proper decimate pattern. For example, instead of frame numbers 0,1,2,3,4,5, you have 0,1,2,2,4,5. mov -r 24 -y output. I used the following commands to increase (double) frame rate of the video. MP4, by default, is a constant frame-rate muxer in ffmpeg, so timestamp gaps created by mpdecimate removing duplicates will be plugged back in by duplicate frames. Thanks Using ffmpeg, I was able to remove duplicate frames from a video using ffmpeg -i in. As an output option, duplicate or drop input frames to achieve constant output frame rate fps. FFmpeg - dropping duplicate frames. If anyone else is ever facing this problem, odd frame rates like 99. dev The fps filter outputs a video with a constant frame rate. The source plays just fine. mp4 -vf "fps=60,fps=fps_mode=duplicate" output. This works ONLY when there are consistent and regular duplicate (not dropped) frames, i. The image sequence muxer duplicates frames based on the frame timestamps in order to maintain a constant output framerate. ffmpeg command to scale, show images at exactly 130bpm. The reason is that I have a very bad webcam video full of repeated frames in unpredictable places and I want to maintain a maximum tollerance of duplicate frames that does not exceed 2 frames (2 equal frames). The original source is 25 fps, so every frame is a duplicate frame. after inspecting video frame by frame it can be observed that the stutter is caused by many frames being duplicated this stutter is present regardless of what is being recorded (game, browser, desktop) but it is easier In vdub2, you can try video => frame rate => process every third frame (decimate by 3) or in ffmpeg. I suspect the problem is more properly characterized as dropping duplicate frames during transcoding. This kind of worked but I couldn't solve the problem with duplicating frames. The removed frames create a gap in the video stream. We can't just remove a random frame from the video stream. VFR stands for Variable Frame Rate. Two inputs of same file with mapping using -map 0:0 -map 1:1. This way you can use FFmpeg to remove duplicate frames every 5th frame in your video without losing the quality of the videoYes, it is possible to remove duplicate frames from videos using FFmpeg. mp4 with the name of your video file and output. But, some footage I have that looks like it was shot at 24fps then edited at 60 has a frame pattern that looks like this: AA BB CC DD EE FFFF Topaz creates new frames like this: Aa Bb Cc Dd Ee Ff fF It ends up FFmpeg does not support drop-frame timecode for anything but 59. Summary of the bug: FFMPEG cannot currently fieldmatch and decimate a yuv input correctly. Since you're increasing video duration, audio should be correspondingly modified as well. But when I tried: ffmpeg -i Spider. But my player won't do 62. drop+duplicate模式：在drop+duplicate模式下，FFmpeg会同时删除和复制帧，以调整帧率到目标 I was recoding a video file and noticed the following irregularity in FFMPEG console output: frame=103119 fps=6. FFmpeg是一套强大的视频、音频处理程序，也是很多视频处理软件的基础。但是FFmpeg的命令行使用起来有一定的学习成本。而ffmpeg-python就是解决FFmpeg学习成本的问题，让开发者使用python就可以调用FFmpeg的功能，既减少了学习成本，也增加了代码的可读性。 When the input stream is VFR, ffmpeg will duplicate or drop frames to generate a CFR stream. mp4 -vf mpdecimate=[options] output. mp4 -vf mpdecimate=hi=64*256:lo=64*5:frac=0. png -frame I want to significantly reduce filesize by dropping frames and speeding it up. 3. In the ffmpeg-user mailing list someone suggested dropping the -re option and trying with uncompressed audio. When I attempt to encode it in a less-bloated format, the resulting output has an incorrect framerate. Commented Sep 12, 2021 at 23:41. I tried the solution by Gyan, but it omits the audio. If you've specified that HandBrake should use a framerate of 23. 97, you can set FRAME_RATE to 29. Learn how to use ffmpeg to optimize screen recordings and reduce their file size without losing visual quality. avi -f framemd5 in-25fps. 文章浏览阅读3. So, I wondered how to use FFmpeg’s mpdecimate to delete duplicates (thus converting to variable frame rate), enhancing only the non-duplicates (thus saving a bunch of time in the process) and then normalize the framerate back to the original 59. Add -vsync 0 to tell ffmpeg to not duplicate or drop frames. Which is what ffmpeg will use as target frame rate in constant frame rate mode for the output. If I use -vcodec copy, the -r 10 looses its power. You need to use the mpdecimate filter to remove duplicates in the input: Command: ffmpeg -i input. Hence the duplicate frame take almost no space to begin with. tiff Result : it works. Hi, Simple Video Editor have an function to select to delete duplicate frames, basicly just drag and drop the video or browse for it and then select Delete Dulicate Frames. Provide details and share your research! But avoid . mp4 -vf mpdecimate -loglevel debug -f null - That'll give you a console readout listing times of frames that FFmpeg thinks are duplicates. I have successfully used mpdecimate in the past to remove duplicate frames, but that always keeps the first frame in the duplicate sequence. For ffmpeg versions older OGV Format plays properly on my computer but transcoding drops (duplicate?) frames. 67 fps, ffmpeg will seek to produce over 500K frames. RTSP to RTMP converting fails after specific time only when IP camera enters night mode. Select Edit -> Cut. 0 q=-0. Change -r to 1000 to keep frames only a millisecond apart. Frames 1-4 are unique and 5 is a duplicate of 4. avi ffmpeg -i . – Gyan. 在优化视频客观全参考算法（主要是 PSNR, SSIM, MS-SSIM ）时，我们首先利用FFmpeg提供的API（avcodec_send_packet()，avcodec_receive_frame()）对输入的两 FFmpeg's default behaviour, when changing frame rate, is to preserve source timing and duplicate/remove frames to match target frame rate. This can be FFmpeg more than 1000 frames duplicated and input height doesn't match. I'm using ffmpeg-2024-04-18-git-35ae44c615-full_build from https://www. avi -vcodec h264 -an -vf "fps=60, setpts=(1/200)*PTS" output_200x_60fps. The latter didn't appear to drop or dupe anything, but the frame count seems off. Navigate to the I frame just after the bad frames. 7 seconds so it displays at about 54/4. This often happens with video capture. I have some videos with duplicated frames and now the video looks not smooth. I can see the framerate drop from 10fps to ~6fps normally and then jump back to The frame rate is 29. Try as I might everything I try with ffmpeg converts the frame rate but changes the number of frames to keep the same duration or changes the duration without altering the framerate. com Tue Oct 2 04:26:02 EEST 2018. Is that possible? I only know the way to remove all duplicate frames with this ffmpeg -fflags +genpts -r 30 -f concat -i input. 0166666. The reason for removing the duplicate frames was to get rid of the jerkiness they caused, but at 9fps, now, I've still got the jerkiness. With X being the amount of frames to keep before dropping a frame, the first duplicate frame is at frame 442, here is the problem, the next duplicate (and the rest) is A little technical, but FFmpeg can be used to find duplicate frames in a clip. 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、 Joel Roth wrote: > Following up my own post. The PTS rescaling method creates and drops frames. I starting using ffprobe to get statistics on the output file. If I pipe to x265, frame duplication works as expected (3) and I see a ~24% decrease in file size. 976, I use FFMPEG through Hybrid as the GUI for my encoding tasks. To prevent any fps change, set -fps_mode passthrough. So, ffmpeg will duplicate frames if the timestamp gaps between frames from the filter output are greater than 1/fps where fps is the nominal frame rate of the stream, and drop frames if they are closer. You'll have to experiment with the metadata selection value 50 to get the right threshold. Then slap a bit’o’noise back on again at the end To change the frame rate without modifying the total length of the video, FFmpeg has to duplicate or drop some frames. mov This method is very slow so be patient. mp4 ffmpeg -itsscale . To achieve this it just duplicates or drops frames as needed. So I have an animated TV show on DVD that isn't interlaced. Of course, this doesn't cause stuttering when playing. Using ffmpeg -framerate 30 -i Rplot%d. To resolve the frame duplication issue, you can leverage FFmpeg's concat demuxer instead of the simpler fconcat method. Duplicate frame detection would also be useful when combined with separatefields filter for duplicate field detection. Commented Jun 12, Transcoding means you'll decode your stream, change framerate (drop frames in simple case) and then encode it again. ffmpeg: same video, same framerate, different number of output frames. 7kbits / With an output rate different than input rate, ffmpeg, by default, will duplicate or drop frames; no interpolation occurs unless you specifically use a filter like minterpolate or framerate. Asking for help, clarification, or responding to other answers. 2 (FPS), while 3601/60 = 60. Unfortunately this process can turn a steady smooth movemen to become clumsy and unnatural in the video. frames] are passed through with their timestamp or dropped so Viewing frame index 3 will show the frame data from frame 2, and is the output I would also expect from FFmpeg. However, the audio went on for FFmpeg will set each incoming frame's timestamp to the time it is received. So by setting the video sync method to constant frame rate, ffmpeg duplicates earlier (non-black) frames to fill in those gaps. Commented Jan 17, 2016 at 8:06. mp4. Ask Question ffmpeg -i input0 -i input1 -filter_complex "[0]scale=175:100:force_original_aspect_ratio=decrease,pad=175:100:-1:-1:color=gray,setsar=1[left];[1]scale=175:100:force_original_aspect_ratio=decrease,pad=175:100: Anyway, ffmpeg is back and I installed it and found the equivalent command that doesn't duplicate frames: ffmpeg -i input_30fps. They are not "duplicate" frames. mp4 with the desired name for the processed video. 01 -i Tell ffmpeg to drop frames to reduce memory usage? 3. The metadata filter keeps all frames which have at most 50% of pixels black. md5 Step 3: Execute the FFmpeg Command. This tightened it up by about 50% of the lost frames. Contribute to QuantumCoded/drop-dupe development by creating an account on GitHub. The select File -> Save. This is codec-agnostic. hackerb9. To remove duplicate frames, use the following FFmpeg command: ffmpeg -i input. 262x seems to say that frame 57 was a duplicate, the total number of duplicates found now = 35, and the total frames dropped is 0. 8. ffprobe returning video stream data twice. ***> wrote: Specifying mpdecimate in the output args is working great for me. Modified 6 years, 8 months ago. So in an area where frames are missing, fps will just duplicate the previous frames. The solution is to set variable frame-rate mode with -vsync vfr. Instead of -r 25 as output, we may use -vsync 0 (passthrough) The -1 index in the third place instructs FFmpeg to drop the third frame. I know I can use mpdecimate together with vfr to drop the second occurrence of the duplicated frame like so: ffmpeg -i input. The output MP4 has these frames dropped out and I have my output with it's start about 1 to 2 seconds delayed from original video, thus resulting in overall less time duration in output video. mp4 -vf mpdecimate,setpts=N/FRAME_RATE/TB out. ffmpeg adds unnecessary frames to output video. To make things even more complicated: The video is 50 fps. The file went from 142 frames and 88 duplicates to 54 frames and no duplicates. mp4, but this encodes the output with mpeg4. I'd prefer to drop the unwanted frames at time of recording but if it must be done as a post-process that is ok however - the video needs to have a timestamp on it, obviously this will interfere with any similarity test so it either needs to be done at time of recording or the similarity test needs to ignore a predefined section of the video Here's a finely tuned filterchain I made for deleting duplicate frames in 120fps recorded 60fps video game footage while ignoring frames where only the mouse cursor moves: ffmpeg -i input. It starts appearing around half time through and stays there until the end. – I further analyzed this issue and found that, it exists even with 2. If I'm reading that correctly then enabling detelecine, and forcing the frame rate to 23. Ffmpeg MPDecimate is a command filter. when you are converting to a lower (not higher) framerate. mp4 However, in my case I want to drop both frames of the duplicate 但是编码期间ffmpeg提示“More than 1000 frames duplicated”，接着是“More than 10000 frames duplicated”；处理另一个类似的视频也出现了类似的情况，甚至多了一个“More than 100000 frames duplicated”。 11. So I am using -ss and -t, but I noticed with VLC that the very first frame is ALWAYS duplicated one time, no matter the file or the duration I choose. 976fps, it will drop those duplicate frames. This is not really a “bug” but a comment on the new “Replace Duplicate Frames” feature. mpdecimate will remove duplicate frames, but by default, FFmpeg will try to generate a CFR (constant framerate) video stream, so it'll duplicate frames as necessary. Make sure Video and Audio are set to Copy, and Output Format is set to MP4. Description: I did my encoding tests using FFmpeg 5. Extract multiples images from multiples videos FFmpeg是一个非常强大的工具，它可以用于执行这样的任务。以下是使用FFmpeg删除视频中顺序重复帧的步骤和示例： 1. Adding -r 15 is the same as omitting it because ffmpeg will inherit the input frame rate by ffmpegにはフレームレートの設定方法がいくつかあるが、同じオプションでも指定場所では効果が違ったりするので一般的な用途のまとめ。オリジナルよりもフレームレートが少ないときは同じように間引かれるが、出力 B‑frames can use both previous and forward frames for data reference to get the highest amount of data compression. " I would like to be able to When the frame rate is changed, ffmpeg will drop or duplicate frames as necessary to achieve the targeted output frame rate. 976 fps!!! When I transcode video with any other fps (24, 25, 29. Converting video where the mouse is moving seems to normally work fine. x版本命令行解码后出现drop或者dup也就是丢帧和多帧的现象，追踪了一下发现是输入视频pts和dts有问题。有个专业属于是：插帧算法因为实际视频中，有变帧率视频通过追踪代码发现 frame= 57 fps=0. 6k次。最近ffmpeg3. Verifying frame rate changes. I assume what you want to do is to keep frames with motion and upto 1 second of duplicate frames but discard the rest. Doesn't work, but it does show dropped frames being duplicated. 1. The concat demuxer requires a more complex input file format How can I delete ALL duplicated frames with ffmpeg and mpdecimate? Ask Question Asked 6 years, 8 months ago. ffprobe show_frames for multiple videos. Using ffmpeg + MPDecimate to get rid of exact duplicate frames (i. mp4 -vf I've successfully used the following command to have it report which frames it believes are duplicates: ffmpeg -i %1 -vf mpdecimate -loglevel debug -f null - 2> dupes mpdecimate fails to drop any of the frames it said it was going to drop and produces a video the full length of the original instead, which of course my shortened audio does ffmpeg -vsync vfr -frame_drop_threshold 1500 -i in. x264, and similarly, x265 store duplicate frames efficiently - we're talking < 100 bytes for a duplicate frame. While I am not in close relationship with C or ffmpeg API, I tried editing fps filter to drop frames that are not in the list. But the length of the output file is still about 4. c中的do_video_out()函数中。 [ffmpeg] My video details : DV-PAL 720x576i , 25FPS , duration=20s , frames=500. This is probably unlikely if the pattern is every 3 frames and I record this game in 60 fps but I drop some frames with random intervals, the footage is mp4 (idk what encoding but I get it using nvidia shadowplay screen recorder) I then convert it to proRes to make it more suitable for editing: -convert video frames to png files with ffmpeg-Find duplicate images (by md5sum or with Total Commander) and delete pngs. Basically frames are just encoded as a packet of data saying, copy the previous frame, and make this change. md5 ffmpeg -i in-25fps. ffmpeg -copyts -i input -c copy -enc_time_base -1 -bsf:v:0 noise=drop=eq(pos\,11291) out This will drop the packet from the first video stream stored at offset 11291 in the input file. 1 version of ffmpeg. 114x. Press the B button (mark-out). The command line can be customized by pressing @KaizerSozay Add -vsync drop in to the command. Maybe unrelated: Note that FFmpeg's mpeg-ps muxer is unable to add this information leads to (many) duplicated and dropped frames, there are ways to work-around iirc. sh This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Duplicate frames dropped when copying Theora streams → Ogg/Theora: Duplicate frames dropped when copying Theora streams: comment:4 by Bernat, 4 weeks ago. Press the A button (mark-in). /pictures/asp_%04d. Reduce video frame rate without dropping useful frames. 97. So, in recreating a 24 hr output sequence at 6. 0kbits/s dup=4 drop=0 speed=0. Frame 3 was dropped and replaced with a copy of frame 2. 环境准备. Default value for hi is 64*12, default value for lo is 64*5, and default value for frac is 0. For example, the original source is variable frame rate, but ffmpeg may decide to change it to According to the documentation, mpdecimate will "Drop frames that do not differ greatly from the previous frame in order to reduce frame rate. The video is exported as 2245 TIFF images (~6. When splitting a video with P-Frame and B-Frame into segments without re-encoding, the dependency chain breaks. avi This command detects and replaces all corrupted frames with the nearest good one. When -ss and -t are placed before the input, ffmpeg resorts to fast seek which relies on the index of the input to allow ffmpeg to start and stop seeking. I saw this post for example. I had to retime the frames after removing the duplicates to get them to play at 24fps, using setpts=N/24/TB. 8 q=25. The former did not report any drops or dupes, but inspecting the frames confirms there were some. -fps_mode vfr (or -vsync vfr in older versions of FFmpeg) disables this behaviour. I frequently have to record meetings at work and a lot of the time, the client screen that I am looking at is not changing while we are talking over On Sun, Sep 15, 2019 at 2:49 PM Blake Blackshear ***@***. However, if it was converted via frame interpolation, there's not much to be done – other than running it through the frame interpolation algorithm again, but I don't know if that would yield particularly good results. mp4 -vf mpdecimate -vsync vfr $filename%05d. – No errors, no warnings, just 0 frames encoded and it exits normally (see 1). mp4 -vf "select='if(gt(scene,0. 3612/60 (clip duration) = 60. So ffmpeg will probe the input's frame rate (6. Nevertheless in ffmpeg documentation I 最近ffmpeg3. I want to delete every 24th frame of the video, and then change to 24 frames a second with audio synched up, and keeping the quality and file size very similar that frames have to be duplicated (what FFmpeg did originally). You are the man ! Ran the entire clip at 24000/1001, only 11 duplicated frames. Likewise: A very basic and pretty in-depth tutorial on how to remove duplicated frames from your clips AUTOMATICALLY without having to manually do it in the video edit Write a new ffmpeg filter. the latest version) to cut a 24 fps matroska file. For example, the original source is variable frame rate, but ffmpeg may decide to change it to constant frame rate automatically, which may result in duplicated and dropped frames. png -vsync 0/1/2/drop -r 24 video. avi -r 50 -filter:v setpts=2*PTS out. If it was done via frame duplication/3:2 pulldown, you could undo the process by dropping the duplicated frames/fields. At the end I have over 130 dropped frames and with the 24fps video that's 5 second difference at the end. 阮一峰——FFmpeg视频处理入门教程 FFmpeg 是一个开放源代码的自由软件，可以运行音频和视频多种格式的录影、转换、流功能。 这里结合自己的实际使用整理FFmpeg常用的命令和参数含义。安装和使用格式 基于Ubuntu系统，只需要简单的apt命令就可以安装。 sudo apt update sudo apt -y install ffmpeg 安装完成之后 If you know the PTS or data offset or packet index of the target frame, then you can use the noise bitstream filter. There are (almost) always frames that depends upon frames from the previous segment or the next segment. Instead of providing a fixed frame rate to FFMPEG/libx264 (-r/-framerate), I would like to specify a variable frame rate with a MAXIMUM value, and allow libx264 to down the frame rate as it sees fit. avi Share. I tried the latest master to see if it failed the same when Codecs use reference frames, and only encode what has changed from the reference. ts -vcodec copy -acodec copy -y out. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. When re-encoding with the -shortest option and starting the stream again, no buffer overrun is explicitly reported, but duplicate frames still appear. See here an example: As described at the beginning, I would refer to the errors as "lost" or "dropped" frames (I don't know what the correct term is). avi -c copy fixed. In order to verify which frames are duplicated or dropped by a frame rate change, you can first generate a sample video: [FFmpeg-user] Why are half the frames "duplicate" ? sean darcy seandarcy2 at gmail. In the output stats, to the right of frame=605, you can see dup=46, which indicates that ffmpeg added 46 duplicated frames. 4. You can imagine this like in the tv show &quot;the dragon prince&quot; (at least the first season). 0 q=29. 0 size= 0kB time=00:00:00. mp4 My suspiscion is that you are having frames with duplicate timestamps since you are joining several different vídeos that have all their own timestamp and changing the video. Is there any way (via script or preferably some parameter in calling ffmpeg that I missed) to extract frames from an avi file and ignore sequentially duplicate frames, thus being able to go through the pictures looking only at the deltas/changes?. 1. How can I prevent ffmpeg from dropping frames I tried every -vsync option and -frame_drop_threshold 0 but nothing worked. However there is a mpdecimate_trim repo that does a good job. mov -r 60 -filter:v "setpts=PTS/2. It basically list all the frames to be dropped (using mpdecimate) and then creates a complex filter to trim all those frames (and the corresponding audio) from the video by splitting In some cases, these duplicated frames can cause synchronization issues or disrupt the overall flow of the final video. Navigate to the I frame just before the bad frames using the slider or the up/down arrow keys. Previous message (by thread): [FFmpeg-user] ffplay RTP: dropping old packet received too late Next message (by thread): [FFmpeg-user] Why are half the frames "duplicate" ? Messages sorted by: 1. 7x Adobe Premiere CC) do NOT duplicate 1st frame. avi -f framemd5 in. FFMPEG VMAF consistently low rating despite quality encode. Is there an ffmpeg incantation that replaces duplicate frames : ffmpeg; FFmpeg Mpdecimate filter for Dummies – Trembit; ffprobe – Reporting duplicated frames with FFmpeg – Stack Overflow I want to use FFMPEG (the latest version) to cut a 24 fps matroska file. The Solution: Fixing the Duplication Problem. 输入帧率大于输出帧率的输出信息 （2）输入帧率小于输出帧率 ，例如： 由于输入帧数量小于输出帧数量，不足的帧将以 重复帧 补全，表现为ffmpeg的输出中 dup 参数持续增大，且可能出现 More than 1000 frames duplicated 的警告。 Specifically a 60 second clip dumped 3601 frames, and omitting vf fps=60 produced 3612 frames. In my case I want the first frame gone too. To check the target framerate, first play your jittery video in a player than can skip frame by frame, and observe the frequency of duplicate frames. avi -r 50 out. 5k次。在使用ffmpeg进行HEVC到MP4的转码过程中，遇到"More than 1000 frames duplicated"等警告。该警告表明视频中存在大量重复帧，而非错误。尽管如此，最终生成的视频仍能正常播放。由于相关问题 The image sequence muxer is set to constant frame rate mode. I am not changing framerates ffmpeg -err_detect ignore_err -i video-with-broken-frames. mp4 使用duplicate模式时，同样可以使用-fps参数指定目标帧率。例如，使用以下命令将视频帧率提高到60fps： ffmpeg -i input. However, the above command removes duplicate frames and puts frames next to each other whereas in order to keep a timecode of sorts it would be a lot more useful to be able to extract PNGs with frame number (video is progressive 60fps) but without all of the duplicates. 67 fps) and drop or duplicate frames to match that rate if the input supplies a different number of frames (per-second). In H. Here frame 1 was duplicated to make up for the dropped frame 4. There may be some hack to remove frames without re-encoding, but it's complicated. A beginner-friendly guide with simple steps. " – osullic. Adding -vsync drop destroys the timestamps and makes the muxer output frames at a constant rate. For example, in VLC, good frames will be display followed be partially corrupted frames followed by complete frames. Replace input. That is, a null frame is effectively a way of repeating the previous frame. 94fps, while somehow preserving the timeline. ffmpeg/libx264 C API: frames dropped from Remove Duplicate Frames from Video Using FFmpeg. In an area of the video where you already have the correct frame rate, the fps filter won't change anything. avi ffmpeg -i in. I need to increase (double) the video frames without any duplicate frame. 确保你的系统中已经安装了FFmpeg。你可以通过在终端或命令提示符中输入ffmpeg -version来检查FFmpeg是否已安装及其版本信息。 2. Encoding configuration and even codec doesn't depend on how your video was encoded initially, so Open the MP4 file. Why? 3. The behaviour you ffmpeg -i <input> -filter:v fps=30 <output> If the input video was 60 fps, ffmpeg would drop every other frame to get 30 fps output. MPDECIMATE and SETPTS. It does seem to work when there are two duplicate frames in a row. the following awk line erases those frames that are not needed when encoding a video with framerate INRATE at 25fps; the final ffmpeg line puts the remaining frames back together; You can check that the frames are identical with the framemd5 filter: ffmpeg -i in. The details and the source video itself are on this post. > > Joel Roth wrote: > > Hi list, > > > > First of all, thanks to the ffmpeg developers and community > > for this awesome software. SInce the output rate is set and mode is constant frame rate, ffmpeg will duplicate the last frame till next input frame is received, or drop if two frames are less than 10ms apart. While it requires some technical proficiency, it offers granular control over the process. 7 = 9fps, which is jerky. > > > > I'm using a two-pass workflow, where I pipe concatenate > > source files in the first pass, then trim and process the > > result in a second pass. Remove duplicate frames from video with ffmpeg and mpdecimate Raw. ffmpeg -i in. Related. 86 bitrate = 116. gat jqol htbfuag lexk fxipcv kchi uaqi kxuzo rfklow idhol dfylizh crzp nmscg lsumnu tpinw