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From Wang Rui, "additional FFmpegParameters class in the ffmpeg plugin for setting parameters before opening the video file, which benefits from getPluginStringData() as shown in the ReaderWriter implementation.

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Now we can use ffmpeg to render webcam video (using the vfwcap device) under Windows:

osgmovie 0 -e ffmpeg -O "format=vfwcap frame_rate=25"

The number 0 just indicates a default device number in ffmpeg.

I think this can work under Linux, too, and should be a bit better than comparing the filename with a '/dev/' string. Just type:

./osgmovie /dev/yourcam -e ffmpeg -O "format=video4linux2 frame_rate=30 size=320x240""
This commit is contained in:
Robert Osfield
2010-11-03 10:37:32 +00:00
parent afa563df57
commit 4ced7dffc4
8 changed files with 168 additions and 11 deletions
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7
src/osgPlugins/ffmpeg/FFmpegDecoder.cpp
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@@ -1,5 +1,6 @@
#include "FFmpegDecoder.hpp"
#include "FFmpegParameters.hpp"
#include <osg/Notify>
#include <osgDB/FileNameUtils>
@@ -36,7 +37,7 @@ FFmpegDecoder::~FFmpegDecoder()
}
bool FFmpegDecoder::open(const std::string & filename)
bool FFmpegDecoder::open(const std::string & filename, FFmpegParameters* parameters)
{
try
{
@@ -100,7 +101,9 @@ bool FFmpegDecoder::open(const std::string & filename)
}
else
{
if (av_open_input_file(&p_format_context, filename.c_str(), 0, 0, 0) !=0 )
AVInputFormat* av_format = (parameters ? parameters->getFormat() : 0);
AVFormatParameters* av_params = (parameters ? parameters->getFormatParameter() : 0);
if (av_open_input_file(&p_format_context, filename.c_str(), av_format, 0, av_params) !=0 )
throw std::runtime_error("av_open_input_file() failed");
}