[Gnash-dev] from Hong Yu: progress of debugging Gnash-cvs (checked-out Feb 12, 2008) with new FFmpeg (VP6 support) for YouTube flash video

[Hong Yu]

With reference to developers' suggestions and Gnash source, we have done 
the following and have seen progress of playing YouTube flash video with 
direct linking to new FFmpeg (with VP6 support):
[1] check out updated Gnash-cvs on Feb 12, 2008
[2] modify 'configure.ac' to enable '--enable-media=ffmpeg' option
[3] remove libmedia/sdl from compilation (moved to libmedia/ffmpeg)
[4] create directory libmedia/ffmpeg, copy 'AudioDecoderFfmpeg.*', 
'sound_handler_sdl.*', 'VideoDecoderFfmpeg.*' to the directory from 
libmedia/sdl, and modify 'VideoDecoderFfmpeg.cpp' for working with new 
FFmpeg
[5] create class 'ffmpegNetStreamUtil.*', where the utility classes 
'raw_mediadata_t', 'multithread_queue', 'AudioResampler' (from 
server/asobj/NetStreamFFmpeg.*)
[6] according to [3], [4], [5], modify Makefile.am in the directories 
gui/, server/, server/vm/, server/asobj/, server/parser/, utilities/, 
libmedia/, pythonmodule/, po/
[7] modify server/parser/video_stream_def.* for compatibility with 
FFmpeg option
[8] modify server/asobj/NetConnection.* to recover gnash0.8.1 network 
downloading code for use with FFmpeg
[9] modify server/asobj/NetStreamFfmpeg::pause() to solve {pause, 
toggle, unpause} in playing YouTube with FFmpeg
[10] modify server/asobj/NetStreamFfmpeg.* to solve play-end detection 
and 'replay' display in playing YouTube with FFmpeg
[11] modify server/asobj/NetStreamFfmpeg.* to solve downloading progress 
display in playing YouTube with FFmpeg

Currently, after the above modifications, performance of playing YouTube 
with new FFmpeg is satisfactory. Also we will try rebuilding with 
debugger disabled so to ensure the normal production performance.

Our modifications are where '// Hong Yu -- FFmpeg' in the attached. If 
ffmpeg option would be promising and shall be submitted to CVS, we are 
also ready to do further cleaning up.

Best regards,

Hong Yu



Hong Yu wrote:
> Currently we are further modifying Gnash-cvs source for the option 
> '--enable-media=ffmpeg' and have had the following plans:
> [1] Modify 'configure.ac' and set the default value of 'media_handler' 
> to be 'gst'
> [2] Create directory 'libmedia/ffmpeg' and copy the current program 
> dependencies 'AudioDecoderFfmpeg.*', 'sound_handler_sdl.*', 
> 'VideoDecoderFfmpeg.*' under the directory
> [3] Rename the directory 'libmedia/sdl' and exclude it from build 
> temporarily
> [4] Modify files 'Makefile.am' accordingly wherever necessary
> [5] Create files 'ffmpegNetStreamUtil.*' in the directory 
> 'libmedia/ffmpeg', and move the utility classes 'raw_mediadata_t', 
> 'multithread_queue<T>', and 'AudioResampler' from 
> 'server/asobj/NetStreamFfmpeg.h'
> [6] Create files 'NetConnectionFfmpeg.*' in the directory 
> 'libmedia/ffmpeg' and copy partial implementation of 
> 'server/asobj/NetConnection.*' of Gnash-0.8.1, which is invoked in 
> 'server/asobj/NetStreamFfmpeg.*'
> [7] Test and debug the above changes with YouTube
>
> We will post our debugging results with YouTube soon afterwards. And 
> look forward to your helpful suggestions!
>
> Best regards,
>
> Hong Yu

gnashCVS_newFFmpeg_2008Feb15.tar.gz
Description: GNU Zip compressed data