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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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 ...
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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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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 ...
qwr's user avatar
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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 ...
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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 ...
mrjayviper's user avatar
2 votes
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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 ...
payne's user avatar
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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 ...
Sucrenoir's user avatar
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How to convert camrec to mp4 using ffmpeg?

I raise such problem but in the same post I raise the solution. The first thing to know is that the .camrec format (from Camtasia) is a compressed file, so we must first decompress these files before ...
GIO's user avatar
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168 views

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 ...
Podis's user avatar
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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 ...
Daniel's user avatar
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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 &...
5t1nger's user avatar
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62 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 ...
Нестор Алексеев's user avatar
1 vote
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283 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: ...
Greg's user avatar
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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: ...
Greg's user avatar
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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 ...
Programming Guy's user avatar
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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 ...
Karam Abdullah's user avatar
1 vote
1 answer
65 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 ...
JZK's user avatar
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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 ...
Christopher's user avatar
1 vote
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907 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 ...
Daniel Walz's user avatar
1 vote
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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 ...
Ondra Žižka's user avatar
1 vote
0 answers
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 ...
Bristol's user avatar
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1 answer
364 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 ...
Earl of Sandwich's user avatar
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0 answers
654 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 ...
Vijeth Aradhya's user avatar
1 vote
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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. ...
Busturdust's user avatar
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0 answers
79 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 ...
Conley Johnson's user avatar
1 vote
0 answers
392 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 ...
abalter's user avatar
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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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Handbrake Output Visually Freezes on Interstitial

I downloaded an m3u8 stream using a Chrome plugin, and it created an mp4 file which I can play fully in VLC. Next, I am attempting to use Handbrake to encode this file to be played on an old iPod Nano....
Matt Mc's user avatar
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How to Stabliize Video when foreground and background are similar?

I have a video of a lizard. The lizard matches its environment very well making it difficult for predators and algorithms to distinguish it from the background. I've tried using 3 different online ...
Al Lelopath's user avatar
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0 answers
3 views

Command to get only one audio track in output specified by language code with ffmpeg

Ffmpeg Command to get video with only English audio or only one language audio I tried running ffmpeg -i input_video.ext -map 0:v -map 0:a:language=eng -c:v copy -c:a copy -map_metadata -1 -sn output....
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Why is my rendered video output larger than imported files?

I have imported multiple video files (roughly 3h30min / roughly 11GB). I have stripped out the Audio and reduced my total cuts to roughly 2m12sec. I have tried multiple render video output formats, ...
Mark's user avatar
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0 answers
18 views

FFmpeg recover_mp4 help

ive been using ffmpeg and recover mp4 to try and restore a dashcam video from a car accident. im a beginner using this method/ software and im running into this issue. not sure how to "increase ...
taylor thomas's user avatar
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38 views

Gray screen issue after recovered video with ffmpeg

After recovered ".mp4" videos from mobile phone, some videos were corrupt. I used the FFMPEG method to fix the videos. Some CMD commands below; First Code: recover_mp4.exe good.mp4 --analyze ...
Mark's user avatar
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How much better is Thunderbolt external HDD for video editing?

For the two activities of transferring 10GB-large mp4 (.mts) video files from external HDD to laptop, and editing these same files directly on the connected external HDD drive, how much better/...
user610620's user avatar
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41 views

Converting MTS to MP4 gives strange artefacts

I am converting video taken with various personal cameras in .MTS format to mp4 in order to reduce the file size. I am getting some strange artefacts and I wonder what simple mistake I am making? ...
beneix's user avatar
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24 views

How to add subtitles choices to MP4

So I have a Mp4 file, and I want to add multiples subtitles choices to it that will stay forever. A bit like how YouTube, like there are the subtitles choices, and you select which one you want or ...
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why does video need to be in video container files? and why do those file need to be in multimedia container files?

this might be a tough question but i feel the need to ask why does video need to be in video container files? and why do those file need to be in multimedia container files? when people where first ...
how to handbrake 's user avatar
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11 views

Do mobile phones really record in these odd framerates?

I received several video files for editing that were recorded on a mobile phone. (Samsung G11, if it matters.) When I brought the files into VEGAS (still using version 15.0 Platinum), it reports some ...
Theodore's user avatar
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1 answer
83 views

Grey overlay when reading mp4 files in WMP

For a few days, when I play a mp4 video in Windows Media Player (WMP), there is something like a grey filter/overlay. Thus, the whites are greyish and blacks lack depth. This problem is only ...
Sulli's user avatar
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Change default subtitle track in Dolby Vision mp4

I need change default subtitle track in dolby vision mp4 file. I'm tried to remux via ffmpeg - but after that my tv tell me - the file not supported. For example - on default track 3 i have forced ...
ilw's user avatar
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1 answer
4k views

"Non-monotonous DTS in output stream 0:0 This may result in incorrect timestamps in the output file." error

Adding all mp4 file in the directory with FFMPEG . my usual command: ffmpeg -f concat -safe 0 -i <(for f in ./*.mp4; do echo "file '$PWD/$f'"; done) -c copy output.mp4 This shows below ...
Shezan's user avatar
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1 answer
229 views

DVD similar menu for USB with mp4 movies that work on SmartTV with USB?

I have converted my old VHS-movies to MP4 and put them on a USB to be able to watch them on my smartTV which works well. However, I want a DVD-simular menu where I can have a description, and maybe a ...
Xtreme's user avatar
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0 answers
395 views

ffmpeg to output something video/mp4; codecs="avc1.42401f" can read

I have a webapp that plays a video through the MediaSource API. The codec is set to video/mp4; codecs="avc1.42401f" and I cannot change that. I'm able to play the following file https://...
Sam's user avatar
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0 answers
47 views

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 ...
theateist's user avatar
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248 views

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 ...
captcoma's user avatar
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0 answers
259 views

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 ...
Agado Hain's user avatar
0 votes
1 answer
516 views

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 ...
Zombo's user avatar
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929 views

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 ...
KurtM's user avatar
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0 answers
76 views

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 ...
Anton's user avatar
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0 answers
208 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 ....
peacelover007's user avatar