Tagged Questions

This tag should be used for questions related with programmatically handling of video encoding in any format.

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3 views

How can I run and test NVENC API working on Linux CentOS?

We have a server with kepler graphics card and Nvidia driver already installed. How can I run NVENC ( Hardware for Video encoding ) and use its SDK on linux CentOS 6.4 How can I test it that is it ...
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2answers
27 views

Can I use Amazon Elastic Transcoder to only create thumbnails?

I have a Rails app using Paperclip to upload and store videos on Amazon S3. I'm not particularly interested converting the video files into another format, or adding watermarks, nothing fancy. I ...
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0answers
91 views

How to get the exact macroblock bit sizes from H.264 (CABAC) bitstream

I am interested to get the exact size of a macroblock (MB) in bits form H.264 bitstream (CABAC entropy coded). I would like to verify this against the MB sizes available form commercial bitstream ...
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1answer
28 views

Getting QualComm encoders to work via MediaCodec API

I am trying to do hardware encoding (avc) of NV12 stream using Android MediaCodec API. When using OMX.qcom.video.encoder.avc, resolutions 1280x720 and 640x480 work fine, while the others (i.e. ...
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0answers
11 views

HEVC: How to get the angular prediction direction for each TB

I'm using HEVC HM Reference code 10.0. My task is to check the RATE for each prediction mode. As specified in the HEVC overview paper, there are a total of 35 prediction modes. My task is for a ...
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0answers
22 views

Android MediaRecorder: Continuous overwriting

I'm trying to record a 10 second video for surveillance. That is quite straight forward using MediaRecorder in Android. All i have to do is call mediaRecorder.setMaxDuration(10000); However, i want ...
3
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1answer
67 views

Failed to instantiate mediaextractor when using setDataSource()

I am trying to extract Track 0 (video track) of an avi file using MediaExtract and encode to h264 format using MediaCodec. Here is how i configured mediaCodec public MediaCodec configure_codec(){ ...
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7 views

Do encoders benefit from monochrome videos? Are they more efficient?

Let's suppose that i can stream a color video at 480p, due to bandwidth issues, i can't stream a higher resolution. Can i expect to be able to stream a 720p video, if i cut the colors off? What ...
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0answers
22 views

HEVC generating CU's of size 8x8

My task is to generate CU's of size 8x8 using HEVC HM reference 10.0. According to the standard, the CU height and width in the config file should be atleast 16. So, following is my config file ...
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2answers
92 views

How to use Android MediaCodec encode Camera data(YUV420sp)

Thank you for your focus! I want to use Android MediaCodec APIs to encode the video frame which aquired from Camera, unfortunately, I have not success to do that! I still not familiar with the ...
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1answer
49 views

HEVC Disabling Rate Distortion Optimization in the HM Reference code

I'm using HEVC HM reference code version 10. My task is to disable the RDO of the HEVC reference encoder. For doing this i have tried to set RDOQ and RDOQTS to 0 in the configuration file, however it ...
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0answers
55 views

FFMPEG: cannot play MPEG4 video encoded from images. Duration and bitrate undefined

I've been trying to set a H264 video stream created from images, into an MPEG4 container. I've been able to get the video stream from images successfully. But when muxing it in the container, I must ...
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0answers
37 views

Interlaced field picture Layout?

For interlaced field pictures, I am trying to understand with the help of an example how the macro block(MB) metadata is laid out for a picture of resolution say 352 X 288. Assuming MB size is 16 by ...
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2answers
96 views

How to encode jpeg images to H264 very fast (transform images to video)

I have 30 JPEG images (.jpg) at a resolution of 480 x 640. Each image takes aboout 20KB (all of them takes about 600KB). I am using FFmpeg command to encode these images into a video in H264 format. ...
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2answers
85 views

How to encode Bitmaps into a video using MediaCodec?

I would like to encode a set of Bitmaps that I have into an h264. Is this possible via MediaEncoder? I have written some code in order to do it, but the output cannot be played in any media player I ...

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