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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9 views

Corrupt MP4 [recording interrupted]

I was recording an MP4 file using PlaysTV, and my computer had a power fault half-way through the recording. I'm sure that the file contains valid data, it's just that no media player will recognize ...
3
votes
1answer
32 views

Converting WMV to MP4

I just joined this community and hope my question is acceptable since it is quite "noob" like. I have a .wmv video file that is 1280x720 and causes windows media player to abort after excessive ...
0
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1answer
14 views

Can I reproduce video in 1440×1080 12M MP4 on a Full HD TV?

I am interesting in shooting some amatorial videos (family) with a digital camera. At the moment my camera support AVCHD and MP4. I found AVCHD less compatible and more time consuming to process so ...
1
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1answer
41 views

Issues looping a stream with FFMpeg

I'm trying to overlay a video on top of an image. The problem that I'm facing is that the video duration that I want is longer than my input video's duration. To solve this issue, I try to generate a ...
1
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1answer
24 views

App to rotate .mp4 video for Windows or Android

I have an .mp4 format video filmed in portrait format, when currently played on any landscape format device the people appear sideways. I would like a sipmle app for either Windows™ or Android OS to ...
1
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1answer
63 views

Removing MP4 encoding information

Is it possible to remove certain information form a MP4 file? Specifically things like tagging and encoding dates, Writing library and application, Encoding settings... No client needs to know when I ...
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3answers
44 views

Best way to trim and save an existing mp4

If I have an existing MP4/H264 video file and I need to trim the start and end, Then save it as an MP4 again, Are there any recommendations on export settings?
0
votes
1answer
58 views

Convert mkv to mp4 (or webM) with the output file viewable in the process

I'm trying to find a way to convert a MKV file into MP4 and actually already start to view it, while it's still converting. The output file would be viewed via Chrome or Firefox and I would like to ...
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0answers
20 views

Compressing a large MP4 file that is on 2.30mins long

I have been sent a video that is only 2.30 mins long. But is a whopping 168mb, unfortunetely this has to be embedded into an app - so I need it as small as possible. I need to get the file size down ...
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2answers
48 views

Canon Vixia HF R600 - MP4 vs AVCHD

I just bought a Canon Vixia HF R600. It's giving me the option to save files as AVCHD or MP4. I will be importing them to my PC and editing them in Adobe Premiere CC. I'd heard that AVCHD has a ...
0
votes
1answer
17 views

Why is a screencast produced by Quicktime (.mov) is much smaller than the converted MP4 file?

I recently recorded numerous screencasts using Quicktime. The .mov files produced by Quicktime are 2876x1748. To goal was to upload the files to YouTube and so I wanted to convert to the ...
2
votes
1answer
82 views

How can I avoid Quicktime Vulnerability with h.264 encoded MP4 files?

I posted this earlier on SuperUser, but realized that this is likely the more appropriate forum for my question. We have several thousand very large MP4 files that have been encoded over the past ...
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0answers
14 views

saving after effects as mp4 problems

So.. I'm kinda very much a first timer using after effects, a first timer here too, finished a 7 mins long video for an assignment due in two days from now that will decide whether I will pass, but ...
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1answer
43 views

Unedit, remove all edits Video [closed]

How do I remove all edits from my video and view the original footage? I have tried and looked up everything I have gotten closest with after effect and Adobe Media converter.
1
vote
1answer
51 views

inserting video clip into another video but keep original audio

I need to replace video in a larger mp4 file with a smaller mp4 clip - but leaving the original (larger clip) audio intact. So for example I might want the first 2 seconds of SmallClip.mp4 to replace ...
2
votes
0answers
26 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
48 views

Trying to play 2 audio tracks at the same time in MPC-HC

Trying to record some footage, but I have two audio tracks - One track is audio from my PC, and the other track is from my microphone. MPC-HC only lets me play one track at the same time. Any ...
0
votes
1answer
80 views

How can I insert a censor bar into a mp4 movie?

I have a feature film in mp4 format. There is one scene where I just want to place a black censor box to conceal one part of the screen, no more than 7 seconds. I'm a beginner, so my concern is that ...
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0answers
24 views

MP4 Creation for fast startup

I have transport stream source and recorded this with following ffmpeg command line. ffmpeg -y -fflags +igndts -i udp://127.0.0.1:22500 -map 0 -fflags +igndts -codec copy -bsf:a aac_adtstoasc ...
2
votes
1answer
84 views

Does the MP4 HTML5 compatible video type allow for mono audio?

I'm doing some rendering in Vegas Pro and notice that if I select MainConcept (which gives me an HTML5 compatible MP4) the audio tab only has options for the bit rate and the sample rate. Before ...
0
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1answer
39 views

Is there a way to split a mp4 into 2 mp4, one is metadata.mp4 and another is mediadata.mp4

When media data is stored in the end of the mp4 file(it always be there),it is very difficult to extend or delete metadata infos,because metadata will use absolutely offset of this mp4 file to locate ...
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3answers
191 views

Is it possible to create a continuously looping video?

Is is possible to create a continuously looping video? Maybe by editing the container it's in so that it restarts automatically? I have a demonstration video that is playing on a TV in the lobby of ...
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1answer
771 views

How can I ensure that DaVinci Resolve will detect and/or load my .mp4 / .avi files?

New user of DaVinci Resolve, explain-like-I'm-five. =) Have installed and followed instructions for setting up Resolve 12 on my Windows 7 16gb ram computers with GeForce 760 gpu. Initially, Resolve ...
2
votes
1answer
80 views

Avid Media Composer Not Importing MP4s

I just installed Avid Media Composer 8.4.1, and am trying to edit some screen captured MP4s H.264 format I recorded with OBS. However, when I try to import,transcode or link to file the video layer ...
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votes
1answer
154 views

Shooting .mp4 with the CANON EOS 600D

Please help. I need to know if I can shoot videos with my CANON EOS 600D in mp4 format. I don't want to go full HD .mov. I just want the camera to record small .mp4 videos - in order for me to load ...
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0answers
412 views

Need to convert an MP4 to an SCR

I need to convert an MP4 video (or any file format that I can export in Adobe Media Encoder, really) to an SCR file for a Windows screensaver. I'd really prefer not to convert it to MP4, then to FLV, ...
2
votes
1answer
461 views

Removing / Overlaying logo on mp4 video format with ffmpeg on linux

I'm trying to remove logo from an .mp4 video format with ffmpeg on linux machine without re-encoding (for preserving the same quality) with the following command: ffmpeg -i input.mp4 -vf ...
2
votes
1answer
314 views

Why does VLC player convert a 4-minute mp4 to a 4-hour webm?

I used standard webm settings in VLC player 2.2.1 (the latest) to convert a 4-minute mp4 made in Handbrake. In the conversion panel it says "Streaming 04:00" but the end result is "03:49:15" and, on ...
2
votes
4answers
3k views

Canon C100 mk1 AVCHD vs MP4

I recently bought a Canon C100 mk1 after lots of comparing, specs etc. Now I have a question which I cannot really find a final answer for on the interweb. The Canon C100 can record in either AVCHD ...
0
votes
1answer
433 views

How to encode video to profile high using ffmpeg?

This is my first post here. I am in a situation where my original file is of profile High and transcoding profile is High10. I am suspecting that this is the cause my video is not getting played in ...
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0answers
59 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 ...
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1answer
149 views

Burn a MP4 file with SRT subtitles

I have a movie and I want to burn it on a DVD, but I don't know how I do it and what the best options are. I want the DVD be able to play on PlayStation 4. I have a movie in MP4 format and the ...
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0answers
180 views

Recovering damaged-and-badly-recovered mp4 by HEX signature of each frame (and voice)

Question 1: What is the hex signature of EACH frame in an mp4 movie? What is the hex signature of the voice file in an mp4 movie? Question 2: I had mp4 films on a hard disk which was damaged. So I ...
3
votes
1answer
1k views

Video converted by FFMPEG has a different duration, why?

I convert videos using FFMPEG. My goal is to convert them to the MP4 container format (MPEG-4 Part 14) with AAC-encoded audio stream and MPEG-4 part 10-encoded video stream. I use the following line ...
2
votes
1answer
67 views

MP4 to DVD - suggestion for workflow

After a break of a few years I have started doing video editing again. So I bought Sony Vegas and later upgraded it to the latest version. For this particular project my source files was created by ...
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3answers
347 views

Quality of VHS converted to DVD

I work for a small library. We have a collection of VHS tapes that we have recorded to DVD using a Magnavox VHS HQ DVD recorder. They came in as .ogg, They came in a a set of files including some .VOB ...
2
votes
1answer
163 views

How to extract Xtra atom from MP4 file?

Can one dump/extract the Xtra atom from an MP4 file ? I am looking for a solution on a linux system (debian/jessie if possible). Apparently this atom is used by WMP, as per link. I'd like to be able ...
3
votes
1answer
646 views

Adding metadata for films/TV shows on Linux

I am looking for an open-source solution for automatically pulling films/TV shows informations. I've found MetaX (Windows only) and Subler (MacOSX only) from a post here. Apparently metadata sources ...
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0answers
2k views

Copying h.264 video from TS into MP4 changes frame rate and time

I have large MPEG-TS file that I am converting to MP4 using the below command. If I seek to the same time in the video in both the MP4 and the TS file, the MP4 will be a few frames behind the TS ...
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2answers
178 views

Why reencode MP4 to MOV for “easy post processing”?

On this page author reencodes MP4 from GoPro to MOV for "easy post processing". Why the processing becomes easier after that? The author also uses -sameq flag which is gone from ffmpeg without the ...
2
votes
2answers
2k views

How to extract MOOV atom/metadata from MP4 file?

Can one "dump"/extract the MOOV atom from an MP4 file? If so, how? Hoping for an obscure FFMPEG command. I need to be able to process/play a stream without searching for the MOOV atom over and over ...
2
votes
1answer
830 views

Avconv rotating mpeg4 - video loses quality

I'm a newbie in video editing on linux and am trying to rotate a video I took with my phone using AVCONV on an Ubuntu 12.04 machine. It all seems to go honky dory except the output is losing quality. ...
0
votes
1answer
201 views

ffmpeg split file retains original length

I've losslessly extracted 30m from a ~1.5h long video using the following ffmpeg command: ffmpeg -ss 0 -t 00:30:00 -i in.mp4 -acodec copy -vcodec copy out.mp4 The split was successful and out.mp4 ...
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votes
2answers
3k views

MP4 / h.264 patent issues?

I know this is not a legal forum but I'm assuming this is a daily issue for most people on this site since h.264 video (AVC / MPEG4 part10) is so ubiquitous (and there is a legal tag here). I've read ...
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1answer
2k views

mp4 file will not play video, only audio on quicktime, fine on VLC

I have an mp4 file that will not play video, only audio, on QuickTime (10.4 on Yosemite) - and by extension does not show the correct icon in Finder not will it play properly on iOS devices. Others ...
3
votes
1answer
147 views

Lightworks detects aspect ratio incorrectly and clips video from ShadowPlay

I'm using Nvidia's ShadowPlay to record some game footage, and I am trying to edit it in Lightworks. When I import it, it clips off the edges of the content. I have the project set at 1080p 30fps (I ...
3
votes
2answers
4k views

Adobe Premiere saves m4v instead of mp4

I have problems with my Premiere Pro. It is first time this has happened, and I cannot understand why. I am creating a timelapse from my images. When I want to export media, I choose format H.264 ...
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vote
1answer
579 views

Why do SRT subtitles fail to appear in my MP4 videos on iPhones?

I'm using videojs in an HTML page to publish a video with VTT captions. Problem is: iPhones do not play the mp4 in the videojs player - it renders the full videojs player, but when you click the Play ...
21
votes
3answers
18k views

Repeat/loop Input Video with ffmpeg?

I just want to loop a mp4 video with ffmpeg and keep the current settings and codec. For example if input.mp4 is 0:10 long, and I would want to loop it 4 times so output.mp4 is 0:40 long, how could I ...
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0answers
638 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 ...