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1
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2answers
44 views

How to add captions file to video podcast?

I'm starting a tutorial video podcast and have recorded a couple of episodes. I've captioned them, and have the captions file in .srt format. However I haven't yet found a way to embed that file in ...
0
votes
0answers
21 views

ffmpeg output does not play

I'm trying to transcode an uncompressed AVI ~27GB in size to an MP4. I'm using the following command: ffmpeg -i input.avi -c:v libx264 -preset slow -crf 20 -c:a copy output.mp4 The resultant MP4 ...
1
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0answers
20 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 ...
3
votes
2answers
44 views

mp4 - Codec or Container

Please explain, so confusing. I get that AVC is a video format, MKV is a container (that can contain mp4 video, FLAC audio etc.), but what is mp4 then?
0
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0answers
21 views

Creating a stream containing only hardsubed subtitles

I'm trying to achieve the following: I have an mp4 file with a single stream, for which I created an .ass file (it is important that the styling and positions in .ass are preserved when ...
0
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2answers
56 views

Is converting DVD to a format to play on a tablet legal (in the UK)

Simple question, is it legal to take a DVD you already own and convert (rip) it into a format (such as .mp4) so it can be played on a tablet or laptop ? In the past you had to use various nefarious ...
0
votes
1answer
40 views

Youtube Video Resolution Problem [closed]

I also posted this question in stack exchange for web applications (http://webapps.stackexchange.com/questions/52579/youtube-video-resolution-problem) I recently uploaded three ~30 second .mp4 files ...
0
votes
1answer
750 views

How to fix Sony Vegas 12.0 blank screen render?

I've got video recorded from my phone and I use Vegas to edit them, when I play the video back in VLC player the video orientation is ok, but when I import into Sony Vegas and it asks if I want to set ...
1
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2answers
178 views

How to convert a MTS file without loosing the quality much

I have shot some videos in a camcorders. They are huge. I used the internal feature of the camcorder (panasonic v720) to convert to MP4 and the quality was reduced very much. What is the best practice ...
0
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0answers
133 views

Get original timecode from DV avi and use it with ffmpeg

With FFMPEG (on Ubuntu linux pc) I am trying to draw the original timecode from DV avi file (captured from miniDV cassette with EDIUS 4 and 5 in Windows) to an output mp4 file. For my script I need ...
0
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0answers
9 views

I need baseline preset in ffmpeg for Video file can play in iPhone [duplicate]

I need to encode a video file in MP4 using H.264 with profile baseline (for iPhones). I using ffmpeg. But, when I want to apply this preset, ffmpeg show me a error: preset baseline not found. So, I ...
1
vote
1answer
43 views

Clear and informative tutorial on video file formats

...I think I will want to make a tutorial that covers video file formats, and their relationship to video codecs. There seems to always be a lot of confusion around these topics for emerging media ...
0
votes
1answer
139 views

Adobe Premier CS6 'Unable to open file' coming from Cineform

I just transformed a MP4 file coming from my GoPro into a MOV file using CineForm studio. It works great in MAC. However, when doing the same on Windows, and transforming from MP4 to AVI, when trying ...
0
votes
2answers
48 views

Adobe Premiere Pro CS6 Shortening Video

I have a video that is 38 minutes and 13 seconds in length but when I convert the video to the H.264 encoding using the 'YouTube HD 720p 29.97' preset the video is converted - but only the first 2 ...
1
vote
1answer
207 views

MP4 video rendering differently on different browsers and different machines

I have asked a similar question before, but we are still having the same issues. Background color of MP4 rendering incorrectly in QuickTime I am trying to encode MP4's for playback on a website. I ...
1
vote
1answer
113 views

Editing a 640x480 mp4 in premiere CS4

I have a video with 640x480 resolution, which I want to import into premiere and add a MASK over specific areas which should not be visible. I'm wondering what settings I should select when I start ...
0
votes
0answers
72 views

Where to start Transcoding with FFMPEG?

I would like to learn a lot about Transcoding video files with FFMPEG from any format to mp4 (hH264/AAC) format. We have a large repository of video files ranging from 1 MB to 2 GB of various formats ...
2
votes
3answers
6k views

How to Create a High Quality, Small File Size .mp4 from .mov

Recently, I helped a friend produce a short zombie comedy. He has now asked me to add it to the film's website as a digital download. I'm not having issues with the digital download. My issue is how ...
4
votes
1answer
154 views

Do video formats support colour profiles?

Recently, I was reading a wiki, dedicated to one popular cartoon show and stumbled upon an interesting problem: From left to right: frames from the US iTunes, Australian iTunes and US iTunes version ...
2
votes
1answer
142 views

Possible to use sRGB as mp4 colorspace?

I have an mp4 using h264 that i'm using in the background of a website. It has to blend in with the background image. I've already created ogv and webm videos for firefox and chrome and these work ...
2
votes
1answer
3k views

How to force ffmpeg to insert keyframe at first frame when downsampling a framerate of a video with x264 vcodec

I have a mpeg4 video at 25fps. This video contains just one static frame. I'm trying to downsample the frame rate to 1fps and convert the video to x246 (mp4). I ran the following ffmpeg command: ...
4
votes
1answer
249 views

How to create a x264 (mp4) video with the smallest size using ffmpeg that has just 1 image through entire video?

I'm creating narrated mp4 (x264+aac) videos for books. Each video has just the book's cover as the background. I wonder what would be the most effective way to create such videos with ffmpeg? I've ...
2
votes
3answers
6k views

Can I manually change an .mp4 to .m4v by changing the extension in the Finder (mac) or explorer (win)?

I need to change an .mp4 (h264, AAC-Audio) to an exactly same .m4v. Can I just rename it from "X.mp4" to "X.m4v"? By renaming, I mean clicking on it in Finder (Mac) or Explorer (Win) and renaming it.
5
votes
2answers
475 views

I changed the .mp4 extension of my video to .mpg and it still opens and plays fine (in VLC and in Windows Media Player). Why is this so?

I'm uploading a file to an external system that accepts only mpg or mpeg extension files. I had a mp4 file so I changed the mp4 extension to mpg and I was able to upload the file into the system. ...
1
vote
1answer
518 views

2 h264/mp4 files does not merging in right way by mp4box

I have a problem when merging two h264/mp4 files with the same parameters except length. I'm using the command mp4box -cat .... After that the video player's behaviour is strange: if I drag the ...
0
votes
1answer
177 views

What is the difference between mkv and mp4 files?

I don't know if this is the correct exchange site to ask this question. I would like to know what is the difference between mkv and mp4 files?
2
votes
3answers
1k views

Gradient banding

I have a video with a gradient background, with silhouette vector animations on top. The gradient therefore stays exactly the same throughout the video. However, rendering the video as mp4, I'm ...
1
vote
3answers
317 views

Utility or method for joining MP4 files

I have two MP4 files that I generated with Camtasia Studio. I need to join them together post rendering with Camtasia (it can't be done during the Camtasia rendering process). Looking for a utility or ...