Questions tagged [mp4]

A digital multimedia container format most commonly used to store video and audio, but which can also be used to store other data such as subtitles and still images.

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1answer
327 views

ffmpeg - Slow down video and loop/repeat audio

I am trying to use ffmpeg to slow down a video speed by 25% (75% speed) without changing the audio speed. ffmpeg -i input_video.mkv -filter:v "setpts=1.3*PTS" "SlowVideo25.mp4" On ...
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1answer
121 views

I want to convert .mp4 to .ts using H264 at constant framerate 25fps

I've been trying to do this conversion for a couple of days reading through forums ffmpeg -i in1.mp4 -vcodec libx264 -s 720x576 -vf "fps=25"-vsync cfr -b:v 2300k -acodec aac -b:a 128k out1....
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2answers
20k views

Howto Repaire or fix the duration of a mp4 video

I'm having a film that's ffmpeg and other progs claims to be 07:03:52 long, but the real playtime is actually more like 2:35:00 ffprobe video.mp4 ffprobe version 3.0.2 Copyright (c) 2007-2016 the ...
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0answers
2 views

MP4 format - metadata - adding markers for events occuring within the video

I am recording IP camera footage to mp4 files. The cameras also produce events when motion is detected by them. My server receives these events. I would like to insert metadata markers in the finished ...
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1answer
100 views

Need to concatenate several MP4 from Garmin dashcam with telemetry

I have a Garmin 66W dashcam for my work (street mapping surveyor) which produces several 1min. MP4 videos of my journey (60 min. = 60 videos). All these videos have telemetry data on it as metadata (...
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0answers
21 views

How to edit my Playstation 5 4K gameplay?

Members. I'm facing a few issues while trying to edit 4K gameplay footage from my PS5. PS5 has two options to capture gameplay: 1080P (.mp4) 4K (.webm) First, the captured 4K footage extension is ....
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2answers
592 views

How to convert ts to mp4

I have a lot of videos needed to convert from ts to mp4, how can I convert it without losing quality? I mean a lot like 30+ each week. I did a search already but none can do it fast enough, doing it ...
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0answers
8 views

mp4 video became white after rendering in kdenlive

I have cut a little piece in the end of 45 minute video. After rendering, it shows only a white screen and also its size grew from 2gb to 9mb. That was my very first video in kdenlive but I'm sure I ...
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1answer
15 views

imported a movie now it has two audio tracks

ok, so i ripped a dvd with handbrake, converted it to an mp4, i import the mp4 to kdenlive and kdenlive is doing this thing where it's giving me two audio tracks, so at first i thought it was a right ...
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0answers
19 views

How to play Video TS folder in VLC or convert it to MP4

I am trying to play a DVD by copying the contents (a Video TS and a Jacket_P folder) to my computer. I copied the Video_TS and Jacket_P folders from a DVD to my computer. The Video_TS folder has the ...
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1answer
43 views

Premiere Pro on Windows 10 N version - Can't import MP4

I've tried to install various codecs - not working. I still can download whole Media Feature, but that's what I would like to avoid, since N version is way lightier. Can you please advice me how I ...
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1answer
163 views

What is the difference between .mts and .mp4 video files?

I know that .mts video files use MPEG-4 video compression. But why then don't they just have the .mp4 file name extension? Since they don't, this means they are not digitally nor conceptually ...
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1answer
51 views

I have a .ts video containing a 720° video record it with an AllieCam360

Hi I have an AllieCam a camera to record 720 videos 360x2 lenses, the format it use is .ts, the program requires a login online, but the manufacturers drop the business and the web site is offline, so ...
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1answer
723 views

Concat files of different encodings?

I have nearly 130 files that I want to burn onto a DVD as an end result. I've gone down a bit of a rabbit hole and ended up at ffmpeg trying to combine all the files into a single giant 2 and a half ...
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1answer
6k views

How is this .mp4 file 596523 hours long?

I came across this joke mp4 file online. (Warning: direct download link to an 8 mb file.) Media players as well as ffmpeg both list the file as having a length of 596523:14:07.00 (!). My first guess ...
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1answer
131 views

Is public manifest.mpd a issue?

I have a public manifest.mpd file. Is it considered a security issue? It has something called cenc:pssh value so i am bit scared if its okay to be public or not?
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16 views

Splicing attempt with ffmpeg runs without error, but doesn't insert the file

I am trying to do the same thing that the person asking this inserting video clip into another video but keep original audio question is. My text file, concat2.txt, looks like this: file '...
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2answers
55 views

Merging mp4 files and preserving subtitles

I'm in the process of digitizing my entire movie collection. For the most part, it's pretty smooth. I'm using Handbrake to put everything in mp4 format, and it's getting moved to my Plex server. The ...
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1answer
312 views

ffmpeg: How to avoid "start: 0.033333" when extraction audio from mp4

When extracting audio and video separately from a mp4 and recombining again ffmpeg -accurate_seek -ss 30 -t 10 -i input.mp4 -vn output-audio.mp4 ffmpeg -accurate_seek -ss 30 -t 10 -i input.mp4 -an ...
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3answers
830 views

How to solve audio/video sync issue on my mp4 screenrecording?

I'm relatively new to video editing and struggling to solve a problem whereas the video (i.e my lips) is out of sync with the audio (i.e my voice). The beginning of the video is fine but by the end ...
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1answer
129 views

Combine mp4 video and a RTMP stream into 1 RTMP output stream via ffmpeg

I need a ffmpeg command to first feed a mp4 video into a RTMP output stream, then followed by a RTMP input subsequently; what should be the parameters to get it working?
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1answer
89 views

Is my MP4 file size too big?

I am working on a film, which I'm editing, and I rendered the one-hour long video to MP4, and the file size is 64,8 GB, and I think it's absurd, when google says the typical file size for MP4 is 700 ...
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1answer
183 views

ffmpeg mov_text subtitle too small when converting mkv to mp4

I want to remux a mkv file into mp4. I used the following command. ffmpeg -i "input.mkv" -c:v copy -c:a copy -map 0:0 -map 0:1 -map 0:2 -map 0:3 -c:s mov_text "output.mp4" Problem:...
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1answer
26 views

Issue after importing video in Premiere

I imported some videos in Premiere Pro (MOV format, captured with iPhone), but after adding them to the timeline, they start to have issues, like video and sound not sync, and videos that repeat ...
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2answers
2k views

Injecting/embedding/adding/writing metadata to a .mp4 file so it's recognised as 360

I'm working on a library that injects/embeds/writes metadata into a .mp4 file to allow the video to be displayed correctly as a 360 video. The input file is a standard .mp4 file in the equirectangular ...
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2answers
1k views

how can I convert slow motion video into normal speed without losing fps or audio sample rate?

I want to download a slow-motion video playlist (with the frame rate of the videos being either 480 fps or 1000 fps.) and be able to speed up the videos at least 16x without losing the frame rate or ...
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1answer
195 views

How to Merge Multiple MP4 videofiles using concat of ffmpeg while transposing 180 degrees two MP4 videofiles

How to Merge Multiple MP4 videofiles using concat while transposing 180o two MP4 videofiles? Currently, i am using the following ffmpeg (concat) command: ffmpeg -f concat -safe 0 -i VIDEOFILES.txt -...
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0answers
8 views

Removing only chapter data from mp4 not video or audio tracks

I have an mp4 video file with chapters. I would like to keep the video and audio data but not have them separated into chapters. I would preferably like to do this without re-encoding or suffering any ...
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1answer
210 views

ffmpeg convert 1 jpeg frame to 10 sec video

I have a 952x600 jpeg image, generated by a PHP script. I want to create another PHP script that uses ffmpeg, which converts that jpeg image to a mp4 video, which has only 1 frame that lasts for 10 ...
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42 views

Recovering an MP4 file - making an MP4 container with no audio from an HEVC file using ffmpeg

My SanDisk micro SD card with some GoPro Hero 8 HEVC footage had to be formatted, but the video files (MP4) were recovered using a tool called RescuePro Deluxe. But these recovered files couldn't be ...
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1answer
361 views

Issues with transcoding to a MXF container

I'm new here, so hi to all :). I'm new to FFmpeg too, and I'm trying to transcode a HEVC file to a mxf file and I'm having some issues. The original file is a rip I made from a Bluray HDR movie a ...
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1answer
52 views

.EXE VIDEO CONVERT TO MP4

I have a video that extension is .exe. I try to open this file in Windows but I can't. I try to convert this file to mp4 but again return empty file. How can I open .exe video?
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2answers
6k views

Removing Metadata Title in mp4 files

I was able to remove metadata titles in mkv files through mkvtoolnix with this code @echo off for /r %%g in (*.mkv) do ("D:\Programs\MKVToolsNix\mkvpropedit" "%%~g" --tags all:"" --delete title ) I ...
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0answers
14 views

Is it possible to stream video without HLS? with fmp4

I understand as below, is this right? Source Video H.264 -> HLS -> WebSocket -> Hls.js -> fmp4(H264) -> decode -> display A. Make source video recorded in H.264 into HLS using ...
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0answers
18 views

How to mux (or reencode) files from lossless avi to mp4 or mkv using the current FFMPEG?

Exactly what it says on the title, how do you mux avi files that utilize lossless codecs such as Lagarith, Huffyuy, FFV1, etc. to mp4 using FFMPEG? Or do you need to reencode the files as opposed to ...
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2answers
3k views

Possible to stream/append images into an existing mp4?

I've been working on a service that downloads a number of images, saves them to disk, and then uses ffmpeg to create an animation (gif or mp4). This can be fairly intensive in terms of memory and CPU ...
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2answers
11k views

FFMPEG: Loop video to the length of audio

E.g. if video is 1 minute, but audio is 1 hour. Make video loop throughout for 1 hour of the audio track. I use this solution to loop image through the lenght of the audio ffmpeg -y -loop 1 -r 6 -i ...
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0answers
26 views

How can I know if a video file is DASH or HLS?

I'm downloading videos, but some of them are DASH, how can I use ffprobe or ffmpeg to know which are using DASH?
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116 views

Fragmented MP4, speed up initial image (change fragmentation on-the-fly)

I need to remux a live stream from an RTSP container to framgented MP4. Video stream is a h264 baseline one. I can have a very good results with ffmpeg, however, I'm struggling with one key thing: I ...
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2answers
6k views

Is it possible to encode MP4 video with VP9 codec?

Does MP4 support VP9 codec or is it exclusive to WebM?
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1answer
55 views

How do I use the transitions in Davinci Resolve 17?

This program stands in stark contrast of the simple but effective Windows Movie Maker of old, Davinci is not as 'simple' and it seems like it very 'complex' at times. One of the things that I liked ...
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1answer
16 views

How to make DVR-generated MP4 easily playable in Windows?

I have a HAR324-8 DVR, and when I export a video clip, I get an MP4 that I cannot play with Windows Media Player 12, Chrome, or Edge browser. When I open the file with VLC Media Player 3.0.16, it will ...
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3answers
6k views

Possible to use sRGB as mp4 colorspace?

I have an mp4 using h264 that i'm using in the background of a website. It has to blend in with the background image. I've already created ogv and webm videos for firefox and chrome and these work ...
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1answer
27 views

A 2 Gigabyte MP4 file on AWS S3 can be played on Browser instantly (no need to download the whole file before streaming), why? [closed]

I thought when streaming a mp4 file on a browser, the browser needs to download the whole MP4 file before playing, because the player needs to know metadata like video codec, audio codec, etc. and ...
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5answers
198k views

Repeat/loop Input Video with ffmpeg?

I just want to loop a mp4 video with ffmpeg and keep the current settings and codec. For example if input.mp4 is 0:10 long, and I would want to loop it 4 times so output.mp4 is 0:40 long, how could I ...
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0answers
42 views

ffmpeg mp4 does not work on Chrome mobile, plays fine in mobile Safari and Chrome Desktop

The mp4 plays perfectly in Safari mobile and Chrome desktop. For Chrome mobile, it shows a video player that is just a black screen, but the correct video length is shown. Hitting play does not play ...
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1answer
34 views

Should color grading be performed on raw clips, or final sequence?

Camcorders that record in .mts (.mp4) files usually split recorded files according to some maximum time limit per clip. For example, after recording straight for 30 minutes, we might find the entire ...
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0answers
34 views

Re-rendering mp4 with much higher bitrate gives worse quality

So I am recording full playthroughs of video games at 40.000 kbps using OBS. I play through the games in multiple sessions, so I end up with multiple clips. I use the following settings to record my ...
2
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1answer
948 views

Lossless convert 3gp video to mp4 using ffmpeg

I'm trying to get lossless conversion of 3gp to mp4 using ffmpeg. I tried ffmpeg -i input.3gp -vcodec h264 -c:a aac output.mp4 I tried with "libx264" for the video codec, I tried just a ...
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0answers
67 views

Video Stream Loop FFMPEG for YouTube, what is missing here?

I am using FFMPEG for streaming 24/7 mp4 video on youtube. The video is somewhere in 2 minutes, the stream starts but does not go on replay, what should I do? I am using this code: @echo off d: cd &...

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