All Questions
11
questions
1
vote
0
answers
85
views
One IP camera playing, one isn't. Codec incompatibility?
I am new to video codecs and would like to understand my problem better.
I am using Siemens camera display in TIA V17 to display the RTSP streams of some IP cameras...
IP camera A: Supports H264 but ...
- 11
0
votes
1
answer
4k
views
Range of "global_quality" value for h264_qsv encoder?
What is the range of the -global_quality setting for ffmpeg's h264_qsv encoder (4.3.2-2021-02-27-full_build-www.gyan.dev, Windows)?
Ffmpeg's documentation for the encoder (archive) states:
The ...
- 10.9k
6
votes
1
answer
30k
views
H.264 video support in Chromium, missing codec?
Been using Chromium for a while, but it occurred to me that most video content does not work. YouTube does, but Vimeo does not, and most video streaming sites as well as random webpages with embedded ...
- 73
0
votes
1
answer
465
views
5k player 4k movie H264 codec isn't using hardware acceleration on GTX970 GPU
The machine I am using: OS Windows 10, 6Gb Ram, NVidia 970GTX and AMD FX6300 CPU, the media player is the latest 5k player display is 4k TV and I am trying out 4k movies, but they lag really badly.
I ...
- 1,199
0
votes
0
answers
437
views
How to extract an elementary video stream from Avigilon .ave container?
I would like to figure out how to extract a H.264 video stream from an Avigilon .ave custom container. Unlike with here where they are using ffmpeg to extract the elementary video stream, when I try ...
- 1,127
1
vote
1
answer
1k
views
iSpy produces 10x larger video files after VGA upgrade
I have a small HP server (ProLiant MicroServer Gen8) and I use it to make surveillance camera recordings. The on-board graphics were quite weak, so I added a GeForce GT730 and installed the latest ...
- 133
3
votes
2
answers
3k
views
How Video4Linux and ALSA work with Codecs
My understanding is that a codec is both a decoder and a specification for decoding. So some group writes a codec which explains how to decode from their format back into the raw bitstream, and they ...
- 2,852
6
votes
0
answers
8k
views
Stream video with FFMPEG, "Output file does not contain any stream"
I would like to stream an H.264 encoded elementary stream wrapped in RTP headers to a port using FFMPEG.
I have tried the following command lines to no avail...
ffmpeg -i 1080p_1.h264 -f rtp -vcodec ...
- 61
9
votes
4
answers
22k
views
Video encoding: How much does the video file size increase with fps?
Given that the next blockbusters of e.g. Peter Jackson (The Hobbit) and James Cameron (Avatar 2) are going to be shot with a frame rate of 48 fps (or even more) - i.e. more than the usual 24 fps - I ...
- 1,716
0
votes
1
answer
4k
views
Why does lossless video compression cause the file size to go way up?
I have a 200MB AVI that I'm trying to add hardsubs to. I'm using VirtualDub to do it. I selected the H264 lossless codec for compression. The resulting file is 800MB. Why does this happen? Is there a ...
- 14.5k
2
votes
3
answers
617
views
What is this video format, and how do I convert It
Description
I have a big (7.4G) .mkv file (1080p) which I want to convert to H.264 (using x264)
Problem
MediaCoder and GSpot are unable to detect the codec. They don't display anything. Just that ...
- 652