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Questions tagged [mpeg-4]

MPEG-4 is an ISO/IEC standard for video and audio compression as a successor of MPEG-2. It has much more complex capabilities including arbitrary shaped videos and new ways of synthesis.

MPEG-4 is an ISO/IEC standard for video and audio compression as a successor of MPEG-2. It has much more complex capabilities including arbitrary shaped videos and new ways of synthesis.

More information about MPEG4 is at http://en.wikipedia.org/wiki/MPEG-4

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What are the licence free codecs for FFMPEG?

So I've recently started implementing ffmpeg in an application that I do intend to distribute commercially. And I've had an hard time getting my head around the whole licensing process. The most commonly answered question I've seen seems to be about…
FunkyPizza
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minimum set of required Atoms/Boxes for mpeg-4 container with H.264 (one stream, progressive video, without audio)

I need to encapsulate H.264 video into a mpeg-4 container. What are the absolute minimum set of boxes/atoms do I need to have? Contained H.264 video is progressive, containing 30fps video, YUV420p, without audio, no subtitles, no program…
goe1zorbey
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MP4 output from h264 has invalid framerate

I am using ffmpeg as a library (libavcodec, libavformat) in my C++ application to put a raw h264 stream (from a camera) into an mp4 container. Essentially I am trying to mimic the behavior of the following call to the ffmpeg executable: ffmpeg…
Yanick Salzmann
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sending camera stream via RTP using Gstreamer

Hi I'm trying to send the strem of a camera using Gstreamer via RTP. I'm using this to send the stream: gst-launch-1.0 imxv4l2videosrc device=/dev/video0 ! videoconvert ! videoscale ! video/x-raw,width=800,height=600 ! avenc_mpeg4 ! rtpmp4vpay…
Zichittella
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Pass ID3D11Texture2D back buffer to libx264 encoder

I'm writing a C++ program to encode frames from a DirectX game to the H.264/MPEG-4 AVC format. I am using libx264 alone with no other dependencies at the moment. I have a ID3D11Texture2D* resolved back buffer of the next game frame. I need to…
Chris Sixsmith
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How can I access Samsung Voice Recorder m4a bookmarks after conversion to Windows mpeg4?

I recorded several files with Samsung Voice Recorder and inserted several bookmarks per file. On my phone, they are m4a files. When copied onto my computer, they appear as mpeg4 files. I need to add these to Powerpoint (one file per slide), and…
Jenn
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Is there a maximum allowed of subsamples per sample for encryption of an ISO based media?

ISO/IEC 23001-7 Common encryption in ISO base media file defines a subsample as: 9.5 Subsample encryption 9.5.1 Definition (Normative) Subsample encryption SHALL divide each sample into one or more contiguous Subsamples. Each Subsample SHALL have…
Martin
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Changing Pixel Aspect Ratio has not effect on playback

I have an mp4 video with resolution 480x540 which I want to display as 16:9 but without re-encoding it. I tried to set the Pixel Aspect Ratio (PAR) using MP4Box as follows, according to this…
Vasilis
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MPEG-DASH streaming live using encoded stream buffer

I have been trying to implement HTTP live streaming using mpeg-dash but need guidance on some issues. Provided : I have audio and video encoded stream in buffered input. a direct mpeg-2 transport stream for above is also available in a…
Ishaan Shringi
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Convert MPEG4 to H264

Does anyone have any ideas on how to convert a mp4 file(mp4/aac) with MPEG4 codec to H264 codec. I can't using ffmpeg on command line since this needs to be done on server. I muxed audio and video and created a movie with the MPEG4 codec, but when I…
inava
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How to port mp3 code to a ARM board

can anyone guide me the steps and knowledge needed to port a codec in ARM board. Like a development board below http://www.arm9board.net/sel/prddetail.aspx?id=348&pid=200&AspxAutoDetectCookieSupport=1 i want to gain expertise in audio and video…
user530928
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RTP Stream... MPEG-2 or MPEG-4?

I'm using RTP TS (Payload 33) to stream some video files in MPEG-2 and MPEG-4, and then perform some tasks over them. How could I know what type of video (MPEG-2 o MPEG-4) is inside the RTP stream I receive? Is there any header or field which…
Javi
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A few questions about the startcode of NALU

I am a beginner to study MPEG4, and there are some definitions that confuse me. It is said if a NALU slice is the first slice of a frame, then the startcode of NALU is 4 bytes "\x00\x00\x00\x01", otherwise it is 3 bytes "\x00\x00\x01". I want to…
Master Qiao
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MPEG4 quality saved in MATLAB

I need to get an mpeg4 file to use in another application, from an original mpeg4 video I loaded into matlab and edited (frame by frame). To do so, I tried using VideoWriter, setting the quality to 100%: newVid = VideoWriter(outputfilename,…
guyts
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What is the resource impact of setting h.264 GOV length to maximum (or past spec'd max)

if I encode something using the baseline profile, but set key frame to maximum (or extended past the maximum and fix the player to support extended key frame intervals), what would the impact on encoder and decoder resources be (if everything else…
michael
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