Is RealVideo 3.0 / 4.0 supported in FFMpeg ?

[rajivrp]

Hi,

I see them in the supported list at http://ffmpeg.org/general.html, but when I try to use them in my command it gives 'Unknown encoder' error -

C:\Users\Administrator>ffmpeg.exe -i C:\Samples\Wildlife.wmv -f rm -vcodec rv40 -r 15 -s 320x176 -aspect 1.818181818 1818181 -b:v 100000 -qscale 15 -acodec real_144 -ac 1 -ar 44100 -vol 256 -strict
experimental C:\Samples\Output.rm

ffmpeg version N-41416-g718607b Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 8 2012 12:49:40 with gcc 4.6.3
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass
--enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope
njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth
eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-
libvorbis --enable-libvpx --ena libavutil 51. 56.100 / 51. 56.100
libavcodec 54. 25.100 / 54. 25.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 78.101 / 2. 78.101
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100

[asf @ 0000000001e9af20] Stream #0: not enough frames to estimate rate; consider
increasing probesize
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, asf, from 'C:\Samples\Wildlife.wmv':
Metadata:
SfOriginalFPS : 299
WMFSDKVersion : 11.0.6001.7000
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
title : Wildlife in HD
copyright : © 2008 Microsoft Corporation
comment : Footage: Small World Productions, Inc; Tourism New Zealand
| Producer: Gary F. Spradling | Music: Steve Ball
Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, s16,
192 kb/s
Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x7
20, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc
Please use -q:a or -q:v, -qscale is ambiguous
Unknown encoder 'rv40'

'rv10' / 'rv20' works, but not 'rv30' and 'rv40', I hope that's the correct value for '-vcodec'.

Also, I am not finding codec name to 'code' mapping (e.g. RealVideo 1.0 -> 'rv10') officially anywhere on FFMpeg site. It will be great if someone can point out if there's such comprehensive list available anywhere.

Thanks in advance,
Rajiv

[rajivrp]

Just 'noticed' of late on the same FFMpeg codecs support page that for 3.0 / 4.0, only the decoding is supported and not encoding.

How dumb of me not to see the page properly before raising it on a forum

Also found that the codec name to code mapping can be seen through 'ffmpeg -codecs' command.

Thanks,
Rajiv