MP4 specifically refers to the MPEG-4 part 14. A standard audio and video container that is part of the MPEG-4 specification developed by ISO / IEC.

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3answers
45 views

MP4 files I download look pale and have colors misplaced [closed]

Ok, first things first: here's a screenshot from a recap I've downloaded. I guess if Neil Patrick Harris would host the ceremony back in 70s it'd look like that. There's this obvious offset of the ...
-1
votes
1answer
51 views

FFMPEG conversion from webm to mp4 intermittent on Ubuntu 14.04 [duplicate]

I am trying to convert .webm file that we get from google's screencastify to .mp4 file. I need it to be playable using Windows Media Player. I need it the file to be playing with all the WMP versions ...
-2
votes
2answers
129 views

Conversion from WebM to MP4 in Ubuntu is slow and bad quality

I have used the command ffmpeg -i input.webm -q:v 10 -c:a copy out.mp4 I also tried using avconv instead of ffmpeg. The conversion is successful but the quality is bad. Also it takes a lot of ...
0
votes
1answer
127 views

What's the easiest way to save a GIFV as a simple GIF?

What's the easiest way to save a GIFV as a simple GIF? Usually i opened the context menu right clicking on the image. Now theres no option for "save image as", just options for the WEBM/MP4 format. ...
1
vote
1answer
202 views

Player for playing .mp4sub files

I have just downloaded a bunch of .mp4 files, which are accompanied by .mp4sub files. There are exactly three .mp4sub (named b, c and d) files for each .mp4 (named a). Example pattern: a_Astra.mp4, ...
1
vote
1answer
87 views

Remux/encode/convert MPG into MP4

I understand that it is impossible to edit metadata of MPG files (i.e. createdate), so I am looking for another way to "upgrade" my MPGs into a newer file format (preferred are formats that work both ...
1
vote
1answer
70 views

Saving .mp4 audio file as an mp3 file [closed]

If you were to save a .jpeg image as an .png image by simply changing the file extension, the image will successfully convert itself. Is there a way similar to this where I can save an .mp4 audio ...
0
votes
1answer
114 views

Converting DVD subtitles to text

I want to convert image-based subtitles (dvd_subtitle) to text-based subtitles (mov_text). I'm on OS X and would strongly prefer to use a free command-line based tool. My source data is either a DVD ...
0
votes
0answers
24 views

What parameters for lightweight HTML5 video with avconv? [duplicate]

I have this: avconv version 0.8.16-6:0.8.16-1, Copyright (c) 2000-2014 the Libav developers built on Sep 16 2014 23:10:48 with gcc 4.7.2 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'film.mp4': ...
5
votes
1answer
611 views

Not able to play a mp4 video purchased from Google Play

I purchased a movie from Google Play, then used Ant Video Player to download it. It's in MP4 format (or, at least, has an MP4 extension). When I try to open it in Windows Media Player, I get the error ...
0
votes
0answers
52 views

How to recover at least audio from broken recorded skype stream file?

I used "Free Video Call Recorder for Skype - DVDVideoSoft" to record an audio-video stream at skype conversation, but mp4 file got broken somehow, because I can not open it with any media player. I ...
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votes
3answers
85 views

How can I convert M4V video to MP4 format under my Windows 7? [closed]

I want to convert M4V videos to MP4 format format to play on my Android Tablet. Is there any recommended app for Windows computer?
1
vote
1answer
142 views

Swapping index of an MP4 file with FFMpeg

I run a web application which provides a few videos on it. Those videos are being displayed with a flash-video-player. Unfortunately, the index of those container-files is at the end of the file, so ...
0
votes
1answer
54 views

convert avi file to mp4 in linux

I have a bunch of avi files. I would like to convert them to mp4 format while retaining their small file size. I am using linux. Can someone please show step by step how to make the conversion, ...
0
votes
1answer
185 views

ffmpeg trying to hardcode subs using -c:s mov_text but fails

Please bear with me; I'm still learning the intricacies of ffmpeg and have hit a problem with subtitles. So, I am trying to change the container of a video from mkv to mp4, and simultaneously ...
1
vote
2answers
3k views

Is it possible to encode subtitles into a MP4 file for use on a PS3?

What's the correct or most up-to-date way of doing this? What program do I use? I want to watch a MP4 on my PS3 with subtitles 'hardcoded', because the PS3 doesn't recognize srt files.
2
votes
1answer
24 views

Looking for Video Player to Cycle Through Files Easily [closed]

I'd like a Video Player for MAC that know how to play most video formats (wmv, flv, mp4, avi, etc) but would let me cycle through the video files (in current folder) on a keypress (for example, right ...
1
vote
1answer
246 views

How can I repair a broken 3GP/MP4 file without a moov header?

I was recording audio two days ago and my phone suddenly died while doing so. I used MP4repair and a short clip of sound could be heard and they would be charging $80 to recover it. I thought it was ...
1
vote
1answer
38 views

What is a good way to make small audio edits to a very large mp4 file?

I have a video that I'd like to remove a few small things from its audio (coughs, phone vibrations, etc.). It's an mp4 and it's rather huge (over 4GB), and I'm not finding an editor that can manage to ...
1
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2answers
771 views

Remove .mp4 video top and bottom black bars using ffmpeg

I'm new to ffmpeg and I have heard that it has a filter for black. I want to remove black bars on top and bottom of the video so the video will be cropped to the remaining video without black bars. ...
0
votes
0answers
95 views

Why does VLC cut off the end of my video when transcoding?

I am trying to "bake in" a custom made subtitle file (Advanced SubStation Alpha) for a short (3:46) video. However, despite trying an assortment of commandline options, VLC seems to always cut off the ...
0
votes
1answer
71 views

How can I convert videos for Sony Xperia U on my Linux box?

I would like to send a few videos for my girlfriend, but I would ensure they are playable on her mobile phone. I want to carry out the encoding tasks on my Arch Linux box, because my PC is a low end. ...
1
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1answer
232 views

Edit “Media Duration” metadata on MP4 file

I have some video files which were converted to MP4, but not quite correctly. When I examine one with exiftool, I see these metadata values: Duration : 0:11:23 Track Duration ...
0
votes
1answer
279 views

ffmpeg: Adding Drawtext timecode & Watermark with -filter_complex, Stream Matching

I am trying to add the timecode with drawtext and put a logo with ffmpeg. The command line looks like this: ffmpeg -i INPUT.MP4 -i logo.png / -filter_complex ...
2
votes
1answer
3k views

How to change ffmpeg -threads settings

Working on a tube site. I'm running videos through ffmpeg on a linux dedicated server to convert to mp4. The server specs: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte ...
0
votes
0answers
118 views

How to concatenate MP4 files without losing embedded subtitle or audio tracks?

I have two MP4 files (mediainfo below), one is a short intro scene, and the other is the primary feature. Now, the primary video contains several audio tracks and embedded subtitles. I want to simply ...
0
votes
0answers
53 views

ffmpeg bitrate variating without reason

I got a mp4 video. I just want to split it in 4GB file parts using ffmpeg (to make it writeable on FAT32). C:\ffmpeg\ffmpeg.exe -i "%NAME%.mp4" -n -t %LENGTH% -codec copy "%NAME%_1.mp4" ...
0
votes
0answers
24 views

Troubles getting -t option with ffmpeg to produce a gif with the right fps and length

I created a movie using matplotlib (the Python graphing package). It is 10 seconds long. I attempted to produce a *.gif using ffmpeg with the following command: ffmpeg -i animation.mp4 -pix_fmt ...
3
votes
0answers
507 views

How to merge MP4 files with different bitrates?

I want to merge two or three MP4 videos with MPEG-4 AVC video codec and MP3 (sometimes MP3 Surround) audio codecs. Both audio and video can have different bitrate. If it will be possible, without ...
2
votes
1answer
557 views

Which FFmpeg command do I use to passthrough FLV to MP4?

I've a number of downloaded FLV files which I would like to convert to MP4. They are already in the correct format so I am told all I need to do is to remux the video and audio streams into an MP4 ...
2
votes
0answers
470 views

IE11 not playing mp4 file

I am using ffmpeg to convert a freely available public RTSP stream to a mp4 file. I can play the file quite well in Chrome using a standard HTML5 video client on a windows 7 machine but not in IE11. ...
0
votes
1answer
621 views

Improve ffmpeg command for MKV to MP4 for iPad?

I have many MKVs made from DVDs and BRs by MakeMKV that I converting to MP4 so I can play/stream on my iPad Air. I now use this command for converting my MKVs to MP4: ffmpeg -i input.mkv -strict ...
0
votes
1answer
203 views

MP4 video plays past it's length?

I have a video file. MP4. It was originally 25GB and 10 hours long. But then I tried to trim it with movie maker. I did what I needed and then I published the video. No, I didn't save over ...
0
votes
1answer
3k views

“windows media player cannot play the file” mp4

We have an .mp4 video hosted on a web site. I can play back the video from the production version of the web site, but not the test version of the site. The production web site has the .mp4 MIME ...
0
votes
0answers
147 views

ffmpeg conversion commandline needed

I want to ask for help on converting a mpg videofile recorded from TV to a mp4 format my SAT Receiver can play, (mp4). Below are the format infos of source and target output by ffmpeg -i: All done on ...
0
votes
1answer
222 views

How to determine 'Output bit depth' of the libx264 library in ffmpeg?

According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything ...
2
votes
1answer
246 views

Cutting multi-bitrate MP4 files for Helix Server with FFmpeg

We are using Helix Server in order to distribute Video On Demand (with multi-bitrate) Content among our audience. This means that there is one MP4 file that contains multiple video streams and one ...
0
votes
0answers
27 views

Put bitrate atom into MP4 container

When iTunes encodes audio with the iTunes Plus setting, it shows 256 kbps as the bitrate, but actually these are VBR files. For files that were not encoded with iTunes, what tool can modify the tags ...
0
votes
0answers
250 views

Microsoft Expression Encoder 4 Screen Capture in Visual Basic

How can I get Microsoft Expression Encoder 4 in Visual Basic to record the screen in wmv or mp4 video?. I've tried with Microsoft.Expression.Encoder.ScreenCapture.ScreenCaptureJob, but the record in ...
4
votes
0answers
158 views

Combine/concatenate multiple MP4 files, making each file into a chapter

I am looking to use handbrake to combine 43 short mp4 files into one larger file. However, I want to ensure that the start of each file is recognized as a chapter. I'd be using vlc to play the file.
2
votes
2answers
4k views

Is there a way to soft embed subtitles into an mp4 file without re-encoding?

I am trying to add an srt file(s) to mp4 files. Is there a way to do it without re-encoding the file. What I have tried: Added subtitles with the handbrake-cli. While this technically worked, it ...
3
votes
2answers
6k views

ffmpeg: Could not find codec parameters for stream 0 (Video: h264) unspecified size

I try to convert a video from .raw to .mp4. For this reason I did download, build and install both x264 and ffmpeg. However, command: ffmpeg -f h264 -i output.raw -vcodec copy output.mp4 fails with ...
1
vote
0answers
139 views

Seekbar not working in Chrome

I have uploaded a video to my Windows Storage and noticed, that the seekbar (of the default Chrome's html5 player) is not working. Url of that video is: ...
4
votes
1answer
4k views

Shouldn't we always use Web Optimized for Handbrake?

I use Handbrake sometimes to compress video files, and notice that the "Web Optimized" option is not chosen by default, and cannot be set to the default in Options either. But I tried both Web ...
0
votes
1answer
5k views

Use ffmpeg copy codec to combine *.ts files into a single mp4

I've got a bunch of ts segments described by a single index.m3u8 file: index.m3u8 segment1_0_av.ts segment2_0_av.ts segment3_0_av.ts segment4_0_av.ts segment5_0_av.ts I know they ...
-2
votes
2answers
116 views

Convert Blu-ray movie to DVD quality [closed]

I have a 30GB .mp4 file (personal full HD movie) which I want to convert to a DVD quality (4.7GB) movie. What is the best way/tool to do that?
1
vote
1answer
677 views

how to save m3u8 stream

I want to save a m3u-stream. The content of the m3u8 files looks like this: #EXTM3U #EXT-X-ALLOW-CACHE:NO #EXT-X-VERSION:3 #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=756617,CODECS="avc1.77.31, ...
0
votes
1answer
298 views

How to check is h264 mp4 file is correct?

I writing applcation which split live stream from web camera to multiple h264 mp4 files. Now I have some problems like missing keyframes and maybe another. Are there any tools to check my output ...
12
votes
4answers
3k views

How can I remove multiple segments from a video using FFmpeg?

I am trying to delete a few sections of a video using FFmpeg. For example, imagine if you recorded a show on television and wanted to cut out the commercials. This is simple with a GUI video-editor; ...
0
votes
2answers
709 views

Remove beginning and end from multiple MP4 files in bulk

I have several 100 videos that I need to remove the first 20 seconds and the last 30 seconds of. Obviously not practical to do this one at a time. Can I automate this somehow, maybe in an OS X ...