Ffmpeg remove timestamps

Ffmpeg remove timestamps

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Super User is a question and answer site for computer enthusiasts and power users. It only takes a minute to sign up. Some timestamps are not correct for reasons Can I process the file and have only the timestamps regenerated without reencoding? I've tried this. As an input option, ignore any timestamps stored in the file and instead generate timestamps assuming constant frame rate fps.

I've also tried the suggestion mentioned here at the bottom:. This also doesn't change the timestamps in the outfile. Any other way to perform this task?

Timestamps are kind of metadata, so I think it should be possible somehow. It turns out that the -r option only works for raw stream data. This can be an H. The -vsync option is used to control output timestamps, not the -r option. The drop parameter resets input timestamps and generates new ones. The -r option before the input tells FFmpeg to read the specified number of frames in constant mode. Sign up to join this community.

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Can ffmpeg fix Timestamp inconsistencies in mpeg2 files?

FFmpeg: recreate timestamps without reencoding Ask Question. Asked 3 years, 3 months ago. Active 2 months ago.Note that this filter is not FDA approved, nor are we medical professionals. Nor has this filter been tested with anyone who has photosensitive epilepsy. FFmpeg and its photosensitivity filter are not making any medical claims.

That said, this is a new video filter that may help photosensitive people watch tv, play video games or even be used with a VR headset to block out epiletic triggers such as filtered sunlight when they are outside. Or you could use it against those annoying white flashes on your tv screen. The filter fails on some input, such as the Incredibles 2 Screen Slaver scene. It is not perfect. If you have other clips that you want this filter to work better on, please report them to us on our trac.

See for yourself. We are not professionals. Please use this in your medical studies to advance epilepsy research.

If you decide to use this in a medical setting, or make a hardware hdmi input output realtime tv filter, or find another use for this, please let me know. This filter was a feature request of mine since FFmpeg 4. Some of the highlights:. We strongly recommend users, distributors, and system integrators to upgrade unless they use current git master. FFmpeg 3. This has been a long time coming but we wanted to give a proper closure to our participation in this run of the program and it takes time.

Sometimes it's just to get the final report for each project trimmed down, others, is finalizing whatever was still in progress when the program finished: final patches need to be merged, TODO lists stabilized, future plans agreed; you name it. Without further ado, here's the silver-lining for each one of the projects we sought to complete during this Summer of Code season:.

Stanislav Dolganov designed and implemented experimental support for motion estimation and compensation in the lossless FFV1 codec.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am trying to modify an HLS segment transport stream, and preserve its start time with ffmpeg.

Here's my command line:. Therefore, an extra 1. If "copyts" is provided, this is added to the timestamp value from the input stream. It is possible to override this delay using the "muxdelay" flag; in that case the delay gets set to zero. Now, why 0. I wish I know the answers, presumably it's there in the spec somewhere. But for now, this would have to do.

Learn more. Asked 5 years ago. Active 5 years ago. Viewed 15k times. Here's my command line: ffmpeg -i fileSequence1. Bala Bala 1 1 gold badge 5 5 silver badges 14 14 bronze badges. I did try -vsync 0but no luck. The same delay persists.

I was able to workaround this by adding a negative offset using the "itsoffset" flag.

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Active Oldest Votes. I decided to dig a little in the source to understand what's happening. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Programming tutorials can be a real drag. Featured on Meta.Search everywhere only in this topic. Advanced Search. Classic List Threaded. Jeremy Whitaker. Reset Timestamps for mp4 Video Segments. My goal is basically to take an mp4 video file as input, and segment it into smaller mp4 videos which can then be played one after another in VLC.

The problem is that whenever I try to play the segmented mp4 video files in VLC, there seems to be a pause between each of the video files by some factor of the segment length. For example, if I'm segmenting a 30 second mp4 video file into 6 5-second long mp4 video segments, VLC will pause for 5 seconds after playing the first video segment, for 10 seconds after playing the second video segment, for 15 after the third, and so on.

It is meant to ease the playback of the generated segments. It is set to 0 by default.

ffmpeg remove timestamps

I think this issue has been discussed before, but I was wondering if it's even possible to make it so that there's no delay between the mp4 video segments when playing them back in VLC. I suspect that it has something to do with the individual segments' metadata, since VLC also has a 5 second delay when I try to play only the 2nd mp4 video segment from the example above. I'm beginning to think that this issue might actually be pretty complicated, so any help would be greatly appreciated.

Here's an example ffmpeg command that I use and it's terminal output: ffmpeg -i webcam. This one doesn't give me an error, but there's a delay between the segments when playing them back in VLC: ffmpeg -i webcam. Carl Eugen Hoyos. Re: Reset Timestamps for mp4 Video Segments. I tested this here with a random input sample and -vcodec mpeg4 and it works fine including vlc playbackplease test without external libraries x and report back. This worked for me as well. Thank you so much for your help.

Free forum by Nabble. Edit this page.The FFmpeg resampler provides a high-level interface to the libswresample library audio resampling utilities.

Reset Timestamps for mp4 Video Segments

In particular it allows one to perform audio resampling, audio channel layout rematrixing, and convert audio format and packing layout. Set the number of input channels. Default value is 0. Set the number of output channels. Set the number of used input channels. This option is only used for special remapping. Set the internal sample format. Default value is none. This will automatically be chosen when it is not explicitly set.

See ffmpeg-utils the Channel Layout section in the ffmpeg-utils 1 manual for the required syntax. Set the center mix level. It is a value expressed in deciBel, and must be in the interval [,32]. Set the surround mix level. Set maximum output value for rematrixing. This can be used to prevent clipping vs. A value of 1. For swr only, set resampling phase shift, default value is 10, and must be in the interval [0,30].

Use linear interpolation when enabled the default. Default is enabled. Set cutoff frequency swr: 6dB point; soxr: 0dB point ratio; must be a float value between 0 and 1.

For soxr only, the precision in bits to which the resampled signal will be calculated. For swr only, simple 1 parameter audio sync to timestamps using stretching, squeezing, filling and trimming.

Setting this to 1 will enable filling and trimming, larger values represent the maximum amount in samples that the data may be stretched or squeezed for each second. Default value is 0, thus no compensation is applied to make the samples match the audio timestamps. For swr only, assume the first pts should be this value. For example, this could be set to 0 to pad the beginning with silence if an audio stream starts after the video stream or to trim any samples with a negative pts due to encoder delay.

The default is 0. Must be a non-negative double float value, default value is 1. Must be a non-negative double float value, default value is 0. For swr only, set Kaiser window beta value.

Must be a double float value in the interval [2,16], default value is 9. For swr only, set number of used output sample bits for dithering.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Video Production Stack Exchange is a question and answer site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation.

It only takes a minute to sign up. Don't see any frames duplicated. The message you quoted - More than frames duplicated - is not ffmpeg's analysis of the input.

FFmpeg duplicates or drops frames when the input and output framerates differ. You need to use the mpdecimate filter to remove duplicates in the input:. Sign up to join this community.

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ffmpeg remove timestamps

FFmpeg - dropping duplicate frames Ask Question. Asked 3 years ago. Active 9 months ago. Viewed 17k times. FFmpeg knows about duplicate frames in the input video stream as it outputs a message like this: More than frames duplicated Is there some way to tell it: "Not include duplicates into the output stream, please?

MarianD MarianD 1, 2 2 gold badges 8 8 silver badges 23 23 bronze badges. Without any details, my guess would be to add -vsync 0 as an output option. Mulvya - Thanks - by your answer it seems that I misunderstood the cited message. It probably says about duplicated time stamps and not about identical frames - which is my problem. I have many groups of identical frames and my goal is to put only 1 exemplar of successive identical frames into the output stream. Mulvya - To be honest I don't know if I really have groups of identical frames - I deducted it only from playback of the video.

ffmpeg remove timestamps

Your -vsync 0 didn't help. Need to see command and full console log. Mulvya - Thank for your goodwill, I added them into my question.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. How to remove a few seconds from. I have test.

This avoids re-encoding, but you can only cut on key frames, so it may not choose the duration you want. Concatenate with the concat demuxer :. You can try to do this without re-encoding, but since you can only cut on keyframes it will possibly not align with your desired cut times, so if you need accuracy you'll need to re-encode:.

See FFmpeg Filter Documentation for details on each filter. I think u have to cut the video to 2 parts then merge them together. In eg below first cut starts at and length is 11 minutes, second cut starts at 11 mins 10 sec, and length is 10 mins.

Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Ask Question. Asked 2 years, 5 months ago. Active 5 months ago. Viewed 7k times. Demo Django Demo Django 95 1 1 silver badge 5 5 bronze badges. Active Oldest Votes. Fast but possibly not accurate This avoids re-encoding, but you can only cut on key frames, so it may not choose the duration you want. Create segments: ffmpeg -t -i input. JerQ JerQ 41 3 3 bronze badges.

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