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Questions tagged [mp4]

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-1 votes
1 answer
528 views

Can I download MP3, MP4, WAV files to the iPhone and play them from Files?

I have private MP3, MP4 and WAV files that are not available via the itunes store, as they are private. I use Linux, so how can I download them from a web server, save them on the iPhone, manage them ...
1 vote
0 answers
241 views

Why does this MP4 video not play on iOS?

Open with the document App, only the file name and file type will be displayed, and the general video can be played directly. So, I switched to AVplayer to play this video with only sound but no ...
1 vote
1 answer
2k views

mp4 media file opens as text document

I've downloaded a video which is being shown as a document file in finder. When clicked on, it opens with TextEdit instead of QuickTime player. When I run the following command in terminal, file vid ...
4 votes
1 answer
3k views

How do I get ffmpeg to encode using constant quality with h264_videotoolbox hardware acceleration for Macs? [closed]

Background info: Apple provides hardware acceleration support for encoding h264 and h265 videos through VideoToolbox. ffmpeg has built-in support for VideoToolbox through the h264_videotoolbox codec. ...
2 votes
1 answer
4k views

Simply Trimming MP4 Videos On Mac [duplicate]

So I have a simple task that I do a lot: trimming a video's head and tail off. On Windows, I open the photo, click edit, drag the bars to where I would like to cut, and I save. It will save as mp4 and ...
1 vote
0 answers
272 views

Quicktime player : Default window size

I'm using manim (Python) to create animations. When I preview the 4k MP4 files it generates with Quicktime player, the app displays the whole content at its original size. But I would like those MP4 ...
0 votes
0 answers
92 views

What tool to edit subtitles embeded in mp4 video?

What tool can I use to edit the subtitles embedded in my MP4 video on osx 12.5 ? I tried Aegisub, it loads my video but not its subtitles. Then I tried Jubbler (7.0.3) which froze at video opening. $ ...
1 vote
1 answer
916 views

Why does Photos recognize EXIF data in a .MOV but not an .MP4?

I have a script that I wrote that uses HandBrakeCLI to convert files from .MOV to .MP4, but then also attempts to preserve various EXIF metadata by using exiftool by using the -TagsFromFile operation ...
3 votes
6 answers
18k views

how to split an mp4 into separate clips?

I have a 3-hour long .mp4 video that has sensible breaks roughly every 30 minutes or so. I want to export this into multiple videos of each section, but have run into nothing but problems trying to ...
13 votes
5 answers
23k views

Best way to merge mp4 files

Got a bunch of .mp4 videos (info shows H.264 Video + AAC Audio) that are chapters of a larger video. I'd like to merge them, but not sure which is the best way. I don't have Quicktime Pro, but I'll ...
173 votes
6 answers
132k views

Convert .mov to .mp4

I want to convert .mov to .mp4! I saved the video from iMovie but it is in .mov format! How do I convert it to .mp4? I'm using a MacBook and I want to share it to my phone, but my phone can't open ....
23 votes
2 answers
28k views

Terminal tool to join mp4 videos

I would like to join mp4 videos like I join pdfs by pdfjoin. Is there any default tool to join videos?
0 votes
1 answer
2k views

How can I copy an MP4 to my Apple TV and play it locally without the Apple TV Mac app?

I want to play an MP4 clip on loop on my Apple TV (4th gen). But I want to do this in an area where the Wi-Fi signal is spotty (ruling out AirPlay). Apparently the Apple TV Mac app supports copying of ...
-2 votes
1 answer
119 views

What exactly does avconvert do with multiPass and disableFastStart parameters?

I don't understand exactly what the avconvert —multiPass and —disableFastStart parameters do. Reading the manpage didn't get me any further. Thank you for an answer
0 votes
0 answers
19 views

How to see when audio playing on mp4

I have mp4 files that are lengthy videos. The sound is purposefully only on during important parts. I'm trying to find a way to visually (or automatically?) find the time periods of the video when ...
-1 votes
1 answer
340 views

vlc: convert multiple files

I want to convert multiple files from .mov to .mp4. I have used vlc for converting single files. Can I batch convert using vlc? I know it is possible on windows, and I have found many tutorials.
9 votes
2 answers
5k views

"open with" default app not working

Mac OS 10.14.3 [Mojave]: QuickTime Player is set as the default app for Finder's "open with" for .mp4 files on my Mac. This is what I want. But when I double-click an mp4 file, the kid3 app [a tag ...
0 votes
1 answer
269 views

Convert m4a with cover to mp4

I've a m4a file with cover attached using mp4art; however Youtube doesn't support m4a. Supported formats - https://support.google.com/youtube/troubleshooter/2888402?visit_id=637603848977966877-...
0 votes
0 answers
50 views

ISO/IEC 13818-3 - Does apple iTunes have documentation on standards for audio file's uploaded for streaming and the iTunes store

Documentation related to the ISO/IEC 13818-3 standard. The standard for information technology, generic coding of moving pictures, and associated audio information systems. I would like to know before ...
0 votes
2 answers
1k views

OpenToonz: How to install ffmpeg for mac osx el capitan when only static ffmpeg builds for macOS 64-bit are available at ffmpeg.org?

I'm trying to install ffmpeg on my mac OS X El Capitan version 10.11.6 Mid 2009 so I can use it's libraries: ffmpeg.exe, ffplay.exe, ffprobe.exe and be able to import/export mp4 and gif files to ...
66 votes
5 answers
83k views

Export MOV to MP4 with Quicktime on Yosemite

I have a screen capture of my computer screen using QuickTime's Screen Recording feature, but that saves it to an MOV format. I'd like to export it to MP4. Is that possible without installing anything ...
8 votes
4 answers
11k views

Software for splitting or trimming MP4 video without transcoding

I occasionally need to trim an MP4 video or split a clip out of the middle. Up to now I've been using a great app called MPEG Streamclip which has all the features I want: super light weight, opens ...
0 votes
0 answers
2k views

No Audio on macOS QuickTime MPEG-4 Video

I am wondering what can be preventing the Quicktime player from playing the audio track alongside a video. The files I have are MPEG-4. When launched on macOS QuickTime, there is no sound. I tested ...
21 votes
3 answers
22k views

How to convert a .mov file to mp4 file? [duplicate]

How do I convert a .mov file to .mp4? There are a lot of converter tools. But I fear there are a lot of virus infected ones. How would you convert a movie .mov file to .mp4?
1 vote
3 answers
556 views

Converting AVCHD files to mp4

I have recently recorded some college lectures using my Canon handycam. The files I seem to have are in AVCHD format. I'd like to know if there is a relatively fast method to convert them into .mp4 ...
2 votes
3 answers
3k views

How do I encode mp4 files with H.264 (or x264) codec in AVIDemux?

I am trying to get AVIDemux set up with the X264 codec using this tutorial. The following is what goes down when I get to the ./configure --enable-mp4-output command Thomas-Phillipss-MacBook:x264 ...
-1 votes
1 answer
268 views

What program can convert .mp4 files created in Keynote to .swf files?

I have created a number of MPEG-4 (.mp4) files from Keynote on my Mac. I now need to use these on a website, but have been told by the website owners that they require the files in ShockWave Flash (....
3 votes
1 answer
13k views

How to Convert a Webex ARF File on OSX (a Mac)

My company is in the habit of adopting Windows-centric solutions. The latest is Webex for hosting and recording meetings. Webex records the meeting and makes the file available for download in the ...
1 vote
1 answer
1k views

What's the maximum necessary size in pixels for a video for iPhone?

I'm exporting MOVs from Flash, then converting them to mp4 with Handbrake. The video will scale to the screen size, but I would prefer it to scale down, rather than scale up. So, what are the ...
0 votes
1 answer
117 views

Saving .mp4 file to iCloud drive, saying need more space but drive saying 147GB available!

I have Macbook Pro, Sierra, 10.12.6. I have activated iCloud and it shows I have 147GB available. I am trying to copy 20GB .mp4 files to the iCloud and it is telling me I am out of space??? How do ...
5 votes
1 answer
1k views

change metadata tag before importing mp4 into iTunes to Music Video

I am a DJ and use record pools to download music and music videos. This is a legal source of mp3 and mp4 of music singles remixed/edited from the album version. My current workflow is: Hazel will ...
0 votes
1 answer
38 views

Why can't I Airplay a certain sound file in iTunes?

I have this one file that, when I play music in iTunes using Airplay, always makes iTunes revert to use the computers internal speaker. When this specific track is finished, next track is again ...
5 votes
2 answers
11k views

Can .mp4 files infect my Mac with malware/adware/spyware?

Coming from Windows background, I'm usually very paranoid about the files I download, but one time I did something stupid - I downloaded some video files that were hosted in https://openload.co/ (not ...
7 votes
3 answers
5k views

Can you change an MOV to an MP4 without transcoding?

How can change video container from .mov to .mp4 without touching the video itself? Preferably a GUI app. I have a bunch of videos in .mov and since .mp4 is more widespread I want to use that, but I ...
-1 votes
1 answer
950 views

Protected Audio File - Removing DRM on old iTunes Purchases to play Music on non-Apple Devices

I would like to learn how to remove the Digital Rights Management copy protection off of iTunes purchases I made prior to 2009 so that I can make use of my entire music library on my Android ...
1 vote
2 answers
13k views

Rotate a video taken on an iPhone, and save it as an MP4

I was recording a video on an iPhone and I had it "upside down" by mistake, meaning the camera was in the bottom-right corner rather than the top-left. When I watch the video on my Mac in Quicktime, ...
6 votes
7 answers
8k views

How to fully automate video conversion to mp4, iTunes friendly format?

I am looking to implement a fully automated solution that will pick video files from an incoming directory, process them and put the result to iTunes special "Automatically Add to iTunes" directory. ...
2 votes
0 answers
5k views

iTunes won't sync MP4s to iPod

I have iTunes 11.0.2. For the first time ever I have downloaded some MP4s from YouTube - the ones that say share with anyone and everyone if you can, so I thought I would. I was able to upload or ...
6 votes
5 answers
25k views

How to watch a .ts video file on an iPad

I've got a .ts video file on my harddrive, and I would like to transfer it to my iPad to watch it there. Here's some data about the file in question: Size: 3.5 GB 1 Video Stream: h264, 1920x1080 2 ...
0 votes
1 answer
5k views

Videos failing to download to iPad from Canon Camera

I am using a Canon Vivia HF R500 to take videos and downloading them to my iPad Air 2 via a USB to Lightening connection. This has been working flawlessly for me for months. I open Photos, connect the ...
0 votes
1 answer
237 views

Automating Creation of Hundreds of Symlinks in Finder

What's going to be the most painless way to automate the creation of hundreds of symlinks? My iTunes Movies folder contains each .mp4 film in an individual folder. These folders are named for the ...
0 votes
1 answer
185 views

Transferring M4V/MP4 files into iTunes

I'm moving my iTunes library to another computer that already had iTunes on it (both are Windows-based). On the original computer, video files loaded and played fine (I sync to an Apple TV). I tried ...
0 votes
2 answers
399 views

iTunes movie classification

I have a few .mp4 files that I have added to iTunes. Some are classified as Home Movies and other are My Movies. I was wondering if there is any way to change this maybe by converting to a certain ...
2 votes
2 answers
14k views

Handbrake x264 encodes .m4v/.mp4 not accepted in iTunes

It seems like every once in awhile, when using Handbrake to encode a DVD rip to x264 with either the mp4 or m4v extension, I can't add the resulting file to my iTunes Library. When dragging and ...
0 votes
1 answer
1k views

Auto add subtitles into the MP4 videos?

I am using Handbrake to convert various movies to MP4 format, so they can be played by iPhone/Ipad... but by default Handbrake does not include the subtitles inside the output files. I am looking for ...
4 votes
3 answers
1k views

How can I delay audio in an mp4 file?

How can I delay the audio (relative to the video stream) in an MP4 movie file and save the result?
1 vote
1 answer
8k views

QuickTime Player > Export Clips

I've got an mp4 in QuickTime which has been split into several clips. How do I export these separately as audio tracks?
7 votes
2 answers
8k views

Convert a bunch of MKV files to MP4 to read them in iTunes

I have a bunch of mkv files that are encoded as MPEG-4 video and AC-3 audio. I usually use Subler to convert the mov into mp4 to read them in iTunes, but the AC-3 audio is unreadable by Subler or ...
1 vote
1 answer
100 views

How to burn a dvd on 10.8

I have a .mp4-file I want to burn to a DVD to then watch on a dvd player and have automatically loop infinitely (can you program that into the dvd or is it to do with the dvd player?) What would you ...
1 vote
0 answers
174 views

Video plays in QuickTime but not in Itunes

This video plays just fine in Quicktime but in Itunes the video plays but the screen stays black. The audio however, does play just fine. I think my video has the right codec?