Questions tagged [codec]

A 'coder-decoder' computer program capable of encoding and/or decoding a digital data stream or signal.

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26
votes
4answers
36k views

How does YouTube encode my uploads and what codec should I use to upload?

Related to What codecs/formats are appropriate for full motion video recording for youtube? I'm wondering exactly how I can expect Youtube to handle my videos. I know they have a rather zealous ...
17
votes
5answers
27k views

How to encode Apple ProRes on Windows or Linux?

Is it also possible to encode video with Apple ProRes on Windows and Linux?
10
votes
6answers
8k views

Is there a video type for vector animation?

Is there a vector-based video type, preferably open-source, so that an animated clip could be produced using "rules" instead of pixel-compression? This would mean lossless resolution-independent ...
9
votes
2answers
7k views

The ProRes of Premiere Pro?

I'm going to be editing more and more DSLR videos, most notably music videos for my band as we start releasing singles and want to know if there is an intermediate format for both cutting and ...
9
votes
3answers
6k views

Best Lossless Video Encoder For Editing

I'm looking for a good video encoder to compress HD files for editing within Sony Vegas Pro and Adobe After Effects. What video codec would provide the fastest possible encoding and decoding? Also, ...
8
votes
1answer
1k views

What codecs/formats are appropriate for full motion video recording for youtube?

I'm recording video game footage via lossless methods, after which I need to compress them and upload them to youtube. I'm not sure which format and/or codecs are best for this. I've been ...
7
votes
3answers
6k 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. ...
7
votes
2answers
503 views

What video codecs can provide “adaptive quality”?

Background: I am trying to compress lossless bluray tracks to a more storage friendly size without a huge loss in quality. What I've been doing thus far: Exploring compression options with ffmpeg. ...
7
votes
3answers
5k views

Best H.264 settings for low bit-rate streaming video

I'm looking to stream some video from Flash Media Live Encoder with a video bitrate of around 150 Kbit/sec and audio of 50 Kbit/sec. The video will contain quite a lot of movement which I want to try ...
7
votes
3answers
2k views

Simple editing without re-encoding from the GoPro AVC codec?

Im looking for a fast workflow, where i can take my gopro video files, make simple cuts (no transisions, no effects, no audio manipulation), and cut them together into a clip and then export that edit ...
6
votes
2answers
3k views

Automatic conversion/encode video for Video On Demand streaming

I need an automatic solution to convert video clips for html5 (mp4/x264, webm/vp8) and flash (mp4/x264) video-on-demand streaming. For a site like Youtube, just much smaller. The input files are ...
6
votes
2answers
18k views

Reduce render file size in After Effects

I am making a simple travel map, like the one in the Indiana Jones movies. I followed this tutorial: (German) When I want to save it as a video (render it), the ...
6
votes
1answer
3k views

ALL-I vs IPB. Which one to use

I'm fairly new do filmmaking. I've been trying to figure out which is best, but people seem to have very different opinions and everyone has his own arguments. My guess is that ALL-I should be better ...
6
votes
2answers
697 views

Video codec for simple animation?

I am generating an animation in Matlab, composed of simple diagrams. The images are characterized by fine structures, strong contrasts and mostly discrete colors, e.g. there are few-pixels wide black ...
5
votes
2answers
8k views

Can H264 achieve “equivalence” with ProRes 422?

Has anyone done or seen any tests comparing Apple ProRes 422 with high-bitrate H.264? We use 422 as a delivery format to go to DCP for theatrical versions of trailers. The bitrate is around 150mbps. ...
5
votes
1answer
7k views

ffmpeg: how to convert to DNxHR in Windows 10?

I have installed ffmpeg version 3.2.2 from the ffmpeg.org download page. When I enter ffmpeg formats, I see dnxhd but not dnxhr. What do I need to do to be able to manipulate dnxhr? I have ...
5
votes
3answers
178 views

Is it possible to encode video using the same codec and container but different parameters for different scenes?

I know that it's very hard to find out best encoding parameters for a whole video file. Wouldn't it be easier to just go through the video and find out the best parameters for different parts (or ...
5
votes
2answers
540 views

How does GSpot calculate “Recommended display size”

I've got a video and I thought it's size was 640x480 and this is shown on GSpot. However also in the container section of GSpot it is saying Recommended Display Size: 853 x 480 does anyone know ...
5
votes
3answers
207 views

Looking For A Video Editor that will maintain the codecs of the original source video

Im trying to test various video/audio codecs by editing clips from larger videos that have the codecs I want to test. Although every video editor i have tried changes the codecs of the clips i create ...
5
votes
2answers
704 views

Does mjpeg handle interlaced video correctly?

I'm using mencoder/libav to capture an interlaced source to mjpeg. Now, my hunch is that mjpeg is a codec that handles only full-frames, progressive video - because I assume it compresses single (...
5
votes
1answer
696 views

QoS for video streaming

What are the most used metrics to evaluate the QoS of a video streaming session? I am looking for tutorials, papers, lecture notes, ppt, anything of that kind, or your own answer.
5
votes
1answer
716 views

Trying to sync audio in mpeg2 video whose video freezes first 8 seconds in playback

So I have a handful of old mpeg2 (.mpg) files with the following profiles as provided by ffmpeg (the timecodes on each are different): Stream #0:0(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / ...
4
votes
3answers
15k views

Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly

I am using below command to push the video to Wowza server, since we are pushing raw H.264 video, the RTP packet does not have the timestamp, and we could observe audio video sync issue while playing ...
4
votes
1answer
10k views

Container format requires global headers

Using this FFmpeg: ffmpeg-20160127-git-9079e99 With this file, if I run this command: ffmpeg -i Miaow-02-Hidden.m4a -c copy outfile.m4a I get this message: [ipod @ 0000000000694500] Codec for ...
4
votes
1answer
576 views

.mkv file not playing in HEVC/H.265 supported player

I wanted to play UHD (4k) videos in my new LeTV (Super3 X55). So I used youtube-dl to download 4k YouTube videos (which are humongous btw) but for some reason most of them do not play. The TV's ...
4
votes
1answer
3k views

Streamable Container for HEVC (H.265)

flv is a container which can be used to stream videos while they are being encoded. flv supports h.264 codec. However, flv doesn't support hevc codec. Is there any container for hevc which is ...
4
votes
2answers
5k views

converting to .MJP files

I would like to convert some short videos to .MJP format, and none of my preferred tools for video conversion can do this. Can anybody suggest free software that can achieve this? OSX preferred, but ...
4
votes
2answers
9k views

Adobe After Effects MP4 Export Issue

I'm trying to export a composition from Adobe After Effects. My Comp is 1280x720, and ideally I'd export with an mp4 container, and h264 video codec. Problem is, After Effects is giving me a PAR error,...
4
votes
1answer
1k views

Mp4 Video Container and the Codecs use with it

I have started to learn about mp4 file format, and I just learned that mp4 is nothing but just a container that defines the structure of the video file, and that it has different codecs inside it for ...
4
votes
1answer
720 views

Codec genealogy / kinship: DivX, MPEG-4 Part 2, H.263

Yes, I know, H.264/AVC is here for everyone, and we're moving (slowly) towards H.265/HEVC, so why bother with these historic formats? Well, just because it's history. I admit my research has been ...
4
votes
1answer
4k views

ffmpeg: overlay rotated video with transparency

I'm new to ffmpeg (video encoding in general). I have two videos one larger than the other. I want to rotate, resize and overlay the shorter video on the larger one at defined coordinates. So far, I'...
4
votes
1answer
2k views

ffmpeg concatenation introduces video stutter but does not affect audio

I've gone through several different variants of this process and it always causes me problems. I've gotten it working sometimes but it doesn't seem to be consistent. I have a video camera which ...
4
votes
1answer
41 views

settings for editing in cs4

What initial setting should I be using in Premiere CS4 if I shot video on a Samsung HMX-q10 camera but shot in standard definition? When I tried DV NTSC the video looks very bad, like it's somewhat ...
4
votes
3answers
3k views

Recommendable production codecs for Adobe video products

I'm currently searching for new codecs that are better suited for production than the ones we are currently using. So far we used QuickTime Animation and PhotoJPEG. The latter always proved as ...
3
votes
2answers
2k views

ffmpeg bgr vs rgb and other similiar pixel formats

I was wondering about the difference between rgb and bgr pixel formats available in many codecs. It reminds me in some way the Big Endian and Little Endian flavours of computer processors. While I ...
3
votes
4answers
4k views

What is the most compatible compression/Codec to in Handbrake use for video that will be played in Chrome and Safari browsers?

I am going to re-sample a bunch of videos to be played through web browsers. (Current video is large, 3 MB for a 4s clip. Hoping to compress by 90%). Use: These videos will be played in a web-based ...
3
votes
2answers
22k views

poor quality export of still images from premiere

This is the actual source image to a video track in Premiere (a PNG): With no resizing whatsoever, and .flv output, this is a resultant frame from the exported video: How could I improve the output ...
3
votes
1answer
834 views

How can encode video with images like these (overlay a video over a fixed image) with ffmpeg?

How can encode video with images like these help me ffmpeg ?
3
votes
1answer
93 views

Understanding containers and codecs

To my understanding, there is the container format (MP4, MOV, 3GP, AVI) and the codecs (Theora, VP8, H264, XVid, DivX). For what I understand, the container format and the codecs are independent and ...
3
votes
2answers
368 views

Does youtube store different video files for different bit rate?

First of all, is the technique called "resampling" ? Does youtube make live resampling for every user ? Isn't it too cpu costly ? So far what i know about codecs is that it has to go through many ...
3
votes
2answers
5k views

What compression should I use for archiving VHS tapes to HDD?

What do you recommended for capturing VHS for archiving on a HDD? Will DV PAL codec do? H264 at high quality? (I'm PAL over here btw). I want to retain the quality, but at the same time I don't want ...
3
votes
1answer
1k views

Why can't my video play from where I drag the playback bar?

I am stuck and really do not know how to explain it in correct manner. Thus I put it in the layman details. I have two 30~ second length mp4 videos saved in cloud storage. video1 is generated by ...
3
votes
1answer
971 views

ffv1 realtime capture throws out a lot of frame dropped messages!

Can you help me to figure out what's going on here? I'm trying to capture in realtime my screen and save it losslessy via ffv1 codec. CPU usage while recording is not so much, as comparison h264 in ...
3
votes
2answers
3k views

How can I set the first frame of a video to an I-frame and the rest to P-frames (preferably with ffmpeg)?

I'd like to try to do some datamoshing like this tutorial. But I'd like to be able to do it programatically, so instead of vdub and avidemux, I'd like to figure out how to do as many parts of this ...
3
votes
2answers
210 views

How does one recover a multiplexed video stream with missing headers?

I have some video files which were stored with the format headers in separate files. Unfortunately, the disk crashed, and the header information has been lost. I still have large chunks of stream ...
3
votes
1answer
2k views

Add timecode information to file

I'm writing a program that interprets LTC timestamps from audio channels in video files. The goal is to remove the LTC track and replace it with some kind of native timestamps directly in the video ...
3
votes
1answer
135 views

How do I prevent Quality loss in the beginning of a video?

My company transcodes videos sent in by users (recorder by our own screenrecording software) I use FFMpeg to do the work using this command: /ffmpeg/ffmpeg -i in.mov -vcodec libx264 -fpre /ffmpeg/...
3
votes
4answers
259 views

How to figure out video format by video sample?

I have a video file (30Mb) in some unknown format, hex dump of its header looks like this: 0000000 78 55 52 30 09 10 02 0a 00 00 09 09 22 93 00 39 0000020 00 00 00 00 bd 09 ...
3
votes
1answer
212 views

What format and codecs to use for PS3?

i have edited a video with Open Shot. However when exporting and trying to watch via PS3 the results end up unsatisfying. I managed to figure out that the video is displayed fine as MP4 with libx264 ...
3
votes
1answer
501 views

Reasons for using DNxHD instead of ProRes?

I often use ProRes or DNxHD codec without any thoughts, because the quality is very similar, even though the code and the compression algorithm certainly is very different. I would like to know in ...