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Questions tagged [video-codecs]

Questions related to video compression and decompression methods. This includes popular video codec standards like H.264, MPEG4.

A video codec is a device or software that enables video compression or decompression for digital video. The compression usually employs lossy data compression.

More details at http://en.wikipedia.org/wiki/Video_codec

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Video-codec rater by image comparison algorithm?

perhaps anyone knows if this is possible. comparing image quality is almost imposible to describe without subjective influences. When someone rates an image quality as good there is at least one person, that doesn't think so. human preferences are…
Andreas Hornig
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How to add support for additional codects to android's MediaPlayer?

According to android documentation there is a limited number of supported audio and video codecs. How to add support for other codecs and extend the supported media formats on android? Are there other alternative for multimedia playback?
Uga Buga
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Simple and lossless video-only codec supported by avconv

This question is half StackOverflow and half SuperUser I need information about simple and lossless video-only codecs that works in avconv. The purpose is to let screencap[1] produce one file for the entire sequence instead of one file per frame.…
user877329
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Embed DirectShow codecs in my app

I have created a video player using directshowlib. Since each user uses a different set of codecs, sometimes there are hiccups (green bar at the bottom, no audio). Is there a way to embed the best suitable codec and use only it?
Yinon Eliraz
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How to play mpeg4 (Advanced Simple Profile) in jwplayer

I am using jwplayer in my rails3 app. It is playing all normal mp4 and flash videos properly. But I observed that it is not able to play: mpeg4 (Advanced Simple Profile) When I parsed that video with stremio it gives the following…
santosh
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Master thesis topic connected with WebRTC

I am student and I'd like to write my master thesis about WebRTC. I wish that it would be connected with media (e.g. video codecs). Unfortunately the only supported video codec in WebRTC is V8. During last couple of days I was searching…
matyyyy
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How can I mux (or encapsulate) H.264 RTP output into a container using FFMPEG?

I am working on the effects of network losses in video transmission. In order to simulate the network losses I use a simple program which drops random RTP packets from the output of H.264 RTP encoding. I use Joint Model (JM) 14.2 in order to encode…
Grad
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Media Foundation: How to Decode Compressed AVI?

folks! I'm trying to transcode a compressed .avi file to .wmv using Media Foundation. While I've succeeded in using MSDN's sample for transcoding to handle an uncompressed .avi, I've had no luck with several different types of compressed .avi…
user2510245
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Continuous live stream from images

I would like to make an application that is live streaming (HTTP Live Streaming) images that are continuously being generated by a camera (e.g. tiff files saved to disk). First I wanted to do this with FFMPEG (Keep FFMPEG running and waiting for…
user2165039
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Use Lagarith for encoding

I have a loss less mp4 file (YUV 4:4:4) encoded using x264 with me. I want to convert it to loss less avi using Lagarith. Earlier, to compress using lagarith, I used virtualDub. But that option now goes out since virtualDub does not support mp4…
Hrishikesh_Pardeshi
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HEVC captures the bits of transform coefficients

How can I modify the code so that when decoding an h265 video stream using HM, it captures the number of bits occupied by the transform coefficients of each CTU in the bitstream? I found that the transform coefficients are decoded in the…
John Z
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This code to retrieve installed codecs finds different codecs depending on whether "Prefer 32-bit" is checked. Why?

I have this code that returns a list of installed video compressor codecs: public static List GetInstalledVideoCompressorCodecs() { var codecs = new List(); var filterCategory = FilterCategory.VideoCompressorCategory; …
Mickael Bergeron Néron
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OpenCV VideoWriter writes a problematic video

My simplified codes: fource = cv2.VideoWriter_fourcc(*'XVID') resulte = cv2.VideoWriter('vidname.avi', fourcc, 200, (720, 540)) while record: image = retrieve frame from camera with pypylon resulte.write(image) resulte.release() I met the…
QuantumRiver
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Video file is lagging out html page

I uploaded a video file to s3 from my app today and the file is causing the page to lag out when I scroll up and down. Here's a fiddle that replicates the issue.
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Why Cr+Cg+Cb is constant?

I am reading a book about yuv and rgb colorspace, it told me how YCbCr come out, these steps like this: R, G, B is a float number ranged 0.0~1.0 use a grayscale method to convert RGB value to Lum value: Y = kr * R + kg * G + kb * B get a difference…
krosshj
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