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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14 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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32 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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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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52 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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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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76 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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34 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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14 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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18 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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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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81 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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45 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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24 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 ...
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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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1answer
436 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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74 views

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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19 views

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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49 views

embed an image in an MP3 and convert to MP4

The Situtation: I have the following situation: about 150 mp3 files, about 1 hour to 3 hours long, I need a quick way to convert it to mp4 with a standardized and unique thumb / cover art image that ...
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1answer
72 views

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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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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1answer
69 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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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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46 views

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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92 views

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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29 views

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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1answer
90 views

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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897 views

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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34 views

concat a/v desync (only in MPC-HC)

I'm concatenating .ts chunks intended for an HLS player into a single .mp4 video. Unlike in other questions these chunks possess same stream properties, However, some chunks have audio stream shorter ...
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29 views

ovelays not embedding properly and no audio

I have a bunch of small mp4 files (without audio), and an mp3 audio file. Using the concat protocol, I concatenated them with -shortest flag ffmpeg -f concat -safe 0 -i "list.txt" -i ".....
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Should I keep any of the auxiliary files associated with an .MTS file?

When recording on a video camera, it not only generates the video in .mts format, but also some auxiliary files in various other folders that seem to be bookmarking cues and thumbnails for the video ...
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31 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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1answer
152 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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1answer
55 views

Why "mat2" show over 90 lines of metadata for video file

I bought a video and see a lot of meta data. What do these metadata mean (overview summary)? Is there something like watermarking to track who the owner is? mat2 -s video.mp4 [+] Metadata for video....
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1k views

Convert Horizontal 1920x1080 mp4 video to Vertical 1080x1920 mp4 with Actual content size of 1080x608

How to convert horizontal 1920x1080 mp4 video to vertical 1080x1920 mp4 with actual content size of 1080x608 I know ffmpeg can do it, but don't know how to do it.
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539 views

Is it possible to extract frames from corrupted mp4?

I have an mp4 file that I'm trying to recover. The file is missing a moov atom. I've tried all the usual utilities like ffmpeg, remoover, untrunc but all of them failed. I'm wondering now if it is at ...
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158 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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255 views

Widely compatible video format with lossless audio

I'm a software developer. My software produces animated video files with music. The video files should be compatible with a wide range of software, and they should have excellent audio quality. The ...
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1answer
101 views

How to cut part of MP4 file using FFmpeg without reencoding?

I have MP4 file. It's duration is 18 minutes 22 seconds. I want to cut part form 7:35 to 14:01 and to save this part as another MP4 file without reencoding. How to do it using FFmpeg?
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50 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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283 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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2k views

Video artifact removal and restoration - How can it be done? (Really?)

I have been researching this for the past couple of days, and all I could find on the subject were a bunch of research papers, a demonstration video of a model that isn't publicly available, and a ...
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Why does audio not work for this mp4 when played on IPad with headphones plugged?

I'm hosting this video : https://itype.techforge.com.au/assets/videos/repeated/WordRat.mp4. It seems to work fine unless you happen to be on an IPad and plug the headphones in. With the headphones ...
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1answer
379 views

Can ffmpeg calculate a new starting keyframe when being asked to split/copy on a non-keyframe?

I understand from a question here that keyframes can (and do) occur anywhere in an h.264 stream, so I'm wondering why most of the advice I see where users want to cut on a specific time or frame (that ...
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1answer
138 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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788 views

ffmpeg non-existing SPS 0 referenced in buffering period

Hello Guys I just wanna ask if this log is normal or not? I'm just curious. I can play the output mp4 without problem. I just want to know what is this log I used ffmpeg version 4.2 because the ...
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3answers
719 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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