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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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 ...
4
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0answers
7k views

moov atom not found

I downloaded this video using youtube-dl's HLS downloader. The video was being HLS streamed using AES-128. Even though I could view it perfectly fine when it was being streamed in the browser, VLC ...
2
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0answers
177 views

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 ...
2
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0answers
328 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 ...
2
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0answers
2k views

Sony AVC vs. MAGIX AVC vs. MainConcept MPEG-2: what's the difference?

In VEGAS Pro 16.0 I'm given (at least) three options if I want to render a 1080p 30fps video for YouTube upload: Sony AVC/MVC, template "Internet 1920x1080-30p" Use this setting to create the ...
2
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0answers
788 views

Extract file thumbnail from mp4 file

I'm currently converting a few mp4 file to mkv. In the process they lose their file thumbnails and I wanted to keep them. So I'm searching for a way to extract the custom thumbnails from the mp4 files ...
2
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0answers
34 views

what encoder can take advantage of 16-core setup? converting/ripping Blu-ray to mp4 format

I'm thinking of upgrading my 6-core setup (single CPU) setup to a 2x8-core/CPU setup. I'm wondering what software will allow me to fully utilize all the cores. I've been using handbrake but I do not ...
2
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0answers
10k views

Using GoPro Studio to edit non-GoPro videos

I'm trying to use GoPro Studio to create a video that includes GoPro video as well as HD video from an iPhone. GoPro Studio was not able to deal with the .MOV file from the iPhone (the audio was ...
2
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0answers
112 views

Set ipad compatible thumbs for mp4 videos based on a frame of the video with command line

I have a directory of 100 mp4 files. All are working well on my ipad but most of them do not have a working thumb. I want to generate these thumbs with a command line command (on macosx) based on a ...
1
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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 &...
1
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0answers
24 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 ...
1
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0answers
109 views

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: ...
1
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0answers
114 views

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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0answers
40 views

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 ...
1
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0answers
24 views

Merge mp3 with jpg and add moving volume as background

I'm trying to put an image with a song and save it as a mp4. But I need some app makes me able to add simple moving edits to the background like Volumes moving Something like this : I wish you can ...
1
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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 ...
1
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0answers
114 views

Screen-Video with 7 FPS (in Davinci Resolve - or other tools?)

I currently edit/cut a lot of computer screen recording footage. The original mp4 files have 7 FPS and I am totally happy with that quality. If I now edit the files in Davinci Resolve 16, the lowest ...
1
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0answers
671 views

MP4 Video created with ffmpeg C++ api does not show in OSX

I am writing a MP4 video from scratch using the C++ API (libav* 4.1.1). This video can be played back just fine using ffplay or VLC. But the Finder Preview and the Quicktime Player on OSX (10.13 and ...
1
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0answers
3k views

What's wrong with VLC seeking and/or MKV created by ffmpeg?

I have creeated a video using FFmpeg. It is a result of putting 4 videos together, tiled, using -filter_complex with overlays. Following the how-to here, I have it created as MKV. When playing this ...
1
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0answers
12 views

Audio in source footage cuts out and starts over a third of the way through (Premiere Pro CS6)

This is a very odd issue that I have been experiencing with a particular video clip. I have a 2 hour long clip that stops the audio at exactly 00:45:21:03 and starts over, as in the audio from the ...
1
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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 ...
1
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0answers
561 views

Change resolution according to bandwidth at the start of the video

The use case described here is very much the same as the YouTube's feature where a lower resolution of the video is selected if the user's network speed is low. But, I'd like to do this only at the ...
1
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0answers
1k views

FFMPEG MXF -> MP4 - Cannot get proper audio on output file

I am software developer working on a project that requires my video files to be an mp4 format, as this is what most vendors support. I am trying to use ffmpeg, to rewrap the MXF file, into an mp4. ...
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0answers
78 views

ffmpeg h264 crashes IE intermittently

First for moderators, this is relevant because I have incorporated ffmpeg in a program to render videos needed for a web-app. My problem is that the videos I render randomly crash IE 11. Other ...
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0answers
357 views

Losing audio in re-encoding with ffmpeg

I have some DVDs I want to save MP4s from. The video files are VOB files. I can play them if I change the extension to .mp4, but I can't use the seek bar in Windows Media Player. Also, the files are ...
1
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0answers
2k views

Switching between H.264 video streams on the fly?

I have several H.264 encoded MP4 files, as well as still images. From these I want to generate a single video stream that I can broadcast. The stream will be composed of alternating still images and ...
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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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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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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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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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0answers
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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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 ...
0
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0answers
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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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 ...
0
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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
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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0answers
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 ...
0
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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 ...
0
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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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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 ...
0
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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
157 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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0answers
59 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 ...
0
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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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0answers
130 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 ...
0
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0answers
36 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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0answers
37 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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0answers
30 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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0answers
13 views

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 ...