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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Decode frames from mp4 file while new ones are encoded into a it

I wrote a video player (written in C++ and C#) that shows a live video stream and also encodes it into mp4 file at the same time. I want to also be able to playback (seek backward or forward) the ...
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Can I check if audio was removed from a mp4 video file?

I have a mp4 video file that has no sound. I would like to check if its audio was edited/removed. Can I somehow check this in the meta data? Are there any other hints that the audio was removed? The ...
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Trimming mp4 file with multiple audio tracks

Setup: For recording gaming footage I use OBS together with Voice meeter to split my audio sources for later editing with DaVinci Resolve. I use the "Replay" function of OBS that records the ...
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How can I transcode webcam MP4 footage to ProRes without losing lip-sync?

A client has recorded footage on a webcam and delivered it as MP4 files. I am trying to transcode these files to ProRes 422 LT to work with them in Premiere. However, on doing so, the audio goes out ...
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How can we keep the subtitle track when converting from MKV to MP4 with ffmpeg?

I have an MKV with integrated subtitles as such: I want to keep "English [Full] - [English]" when converting to MP4. Currently I use this command: ffmpeg -i myMovie.mkv -vcodec copy -acodec ...
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FFmpeg embed thumbnail Windows

I have seen commands like this online: ffmpeg -i video.mp4 -i image.png -map 1 -map 0 -c copy \ -disposition:0 attached_pic out.mp4 However these command don't work as advertised with Windows ...
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How to open MP4 video with mp42 codec (hvcC) in Vegas Pro?

Apparently the video is with no content. Vegas pro detects the file but shows a black footage for 8 hours. Thanks in advance. General Complete name : C:\Docs\A09_20220424145630_007....
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Confused about Bitrate

I am recording demos using a screen recorder (Wondershare DemoCreator) which will be uploaded to a video streaming website. The website has certain recommendations for video quality like, Codec: H.264 ...
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DaVinci Resolve 16 - Can you embed markers as chapters into the rendered metadata?

In DaVinci Resolve 16, I see that you can edit the Metadata and that will get embedded into the mp4 container. I also noticed that if an mp4 has embedded Chapters that Resolve doesn't recognize those ...
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MP4 file has incorrect length (duration) and plays back 5x slower than it should

I have five GoToMeeting (GTM) .mp4 recordings that I saved and downloaded from a five-day class I was teaching. Each recording represents each day's appx. 8 hour class duration. I am importing them ...
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Compressing video to specific size accurately

I'm using guide provided at this page to compress videos to specific size with ffmpeg. The sizes I'm aiming are relatively small (8mb wanted compared to 50mb original) and when I'm trying to compress ...
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Merging multiple files but specify the time each file is inserted (alternatively, stretch them to a specified duration)

Situation: 3 hours of video, consisting of 18 H264 mp4 files that should have exactly 10-minutes each but they last just a little bit less (some milliseconds missing). When merging them, I end up ...
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MP4 Playback Compatibility Issues on files with Chapters

I'm trying to distribute an MP4 file with Chapters included, I'm fine if devices not supporting the chapters just ignore them, so long as the video still plays. I recently discovered some devices won'...
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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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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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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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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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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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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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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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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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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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.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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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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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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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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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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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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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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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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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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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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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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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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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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4 votes
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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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Converting m2ts to mp4 with ffmpeg I get empty date fields

I am trying to turn an m2ts to an mp4 and add geotagging metadata to it in the process. I am using the following command ffmpeg -i input.m2ts -movflags use_metadata_tags -map_metadata 0 -metadata ...
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same image MP4 and png color differences

I'm making a 3D animation but, parts of it need to be static. I can use png renders for that, but pang format have slightly another color than mp4's. Because of this, ther's a visible difference when ...
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Video format for instagram

I need convert to the .mp4 video with this requirements. Container: MOV or MP4 (MPEG-4 Part 14), no edit lists, moov atom at the front of the file. Video codec: HEVC or H264, progressive scan, closed ...
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2 votes
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Stabilize MP4 from gyroscope metadata? (Insta360)

I just got an Insta360 One R 1-inch sensor and the footage is shaky as hell. I realised that you need their desktop application to actually stabilise in post-production but since I'm on Linux this is ...
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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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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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Does transcoding or compression occur when importing and editing .mts (.mp4) video files?

If a .mts video file is opened or imported to a project in a video editor like Adobe Premiere Pro, is transcoding going on? Video or audio compression? If so, why, instead of editing the raw file as ...
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Streaming MP4 files through HTTP without HLS or DASH?

I am building a web application that consists of a web client and a server. The web client needs to play a continuous stream of MP4 files to the user, preferably through a player like video.js. The ...
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Moov atom not found on Raspberry Pi platform (Linux)

I have asked this question on innumerable sites but I haven’t been able to get an answer to solve my problem. The question Need help to fix a broken MP4 which lacks a MOOV atom Seems to be on point ...
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Does ffmpeg concat demuxer update the position of the moov atom if present in each video file?

Years ago I asked this question on: stackoverflow about correct syntax using the ffmpeg Concat demuxer to join mp4 files together. One question I hadn't thought to ask at the time was, when joining ...
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VLC doesn't play mp4v video converted with VLC to h264/h265

VLC reports the original video as: Codec: MPEG-4 Video (mp4v) Video resolution: 8192x8192 Frame rate: 7.549296 I am using the Convert / Save option to convert the video using the following profile: ...
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How to convert Fast Mpeg 4v2 (mp4v) with ffmpeg

I have problem with ffmpeg properly recognizing a video encoded with Microsoft Fast Mpeg 4v2 codec. Apparently it's a software codec. VLC plays the video fine. The codec reported by VLC is: Codec: ...
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Store video files on USB, SD card, microSD, or external hard drive?

Working with raw .mts (MP4) video scenes that are about 6.5 GB in size each (but automatically partitioned by the camcorder into separate 10-minute chunks), what arguments are there for not storing ...
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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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