On 06/05/2012 12:28 PM, Carl Eugen Hoyos wrote:
Sampath Subasinghe <susiriss@...> writes:
1. RGB - YUV conversion
2. YUV - RGB conversion
Issue is that in the image output from step 2, the right
edge of the image is missing, means the pixels are black.
Is this also reproducible if you use ffmpeg (the application)?
If yes, please provide a command line and complete, uncut
console output.
Hi Carl,
I was wondering whether this is what you meant. I have the original
image as a ppm image.
then I do,
ffmpeg - i ref.ppm ref.yuv
which outputs following at the command line
ffmpeg version 0.10.2 Copyright (c) 2000-2012 the FFmpeg developers
built on Apr 27 2012 07:58:14 with gcc 4.4.5
configuration: --enable-shared --enable-gpl --enable-nonfree
--enable-x11grab --enable-libfaac --enable-libfreetype
--enable-libmp3lame --enable-libx264 --enable-pic
WARNING: library configuration mismatch
avutil configuration: --enable-gpl --enable-nonfree
--enable-shared --disable-ffserver --enable-x11grab --enable-libaacplus
--enable-libfaac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-pic
avfilter configuration: --enable-gpl --enable-nonfree
--enable-shared --disable-ffserver --enable-x11grab --enable-libaacplus
--enable-libfaac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-pic
swresample configuration: --enable-gpl --enable-nonfree
--enable-shared --disable-ffserver --enable-x11grab --enable-libaacplus
--enable-libfaac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-pic
libavutil 51. 35.100 / 51. 47.100
libavcodec 53. 61.100 / 53. 61.100
libavformat 53. 32.100 / 53. 32.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 61.100 / 2. 72.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 6.100 / 0. 11.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, image2, from 'ref.ppm':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: ppm, rgb24, 45x32, 25 tbr, 25 tbn, 25 tbc
[buffer @ 0x1d457a0] w:45 h:32 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param:
Output #0, rawvideo, to 'ref.yuv':
Metadata:
encoder : Lavf53.32.100
Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 45x32,
q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (ppm -> rawvideo)
Press [q] to stop, [?] for help
frame= 1 fps= 0 q=0.0 Lsize= 4kB time=00:00:00.04 bitrate=
864.0kbits/s
video:4kB audio:0kB global headers:0kB muxing overhead 0.000000%
-----------------------------------
Which of course has warnings in it.
Then I do
ffmpeg -i ref.yuv ref.ppm
which outputs following.
-----------------------------------------
ffmpeg -i ref.yuv ref.ppm
ffmpeg version 0.10.2 Copyright (c) 2000-2012 the FFmpeg developers
built on Apr 27 2012 07:58:14 with gcc 4.4.5
configuration: --enable-shared --enable-gpl --enable-nonfree
--enable-x11grab --enable-libfaac --enable-libfreetype
--enable-libmp3lame --enable-libx264 --enable-pic
WARNING: library configuration mismatch
avutil configuration: --enable-gpl --enable-nonfree
--enable-shared --disable-ffserver --enable-x11grab --enable-libaacplus
--enable-libfaac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-pic
avfilter configuration: --enable-gpl --enable-nonfree
--enable-shared --disable-ffserver --enable-x11grab --enable-libaacplus
--enable-libfaac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-pic
swresample configuration: --enable-gpl --enable-nonfree
--enable-shared --disable-ffserver --enable-x11grab --enable-libaacplus
--enable-libfaac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-pic
libavutil 51. 35.100 / 51. 47.100
libavcodec 53. 61.100 / 53. 61.100
libavformat 53. 32.100 / 53. 32.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 61.100 / 2. 72.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 6.100 / 0. 11.100
libpostproc 52. 0.100 / 52. 0.100
[IMGUTILS @ 0x7fff69baf6a0] Picture size 0x0 is invalid
[IMGUTILS @ 0x7fff69baf580] Picture size 0x0 is invalid
[rawvideo @ 0x1e8e3a0] decoding for stream 0 failed
[rawvideo @ 0x1e8e3a0] Could not find codec parameters (Video: rawvideo,
yuv420p)
[rawvideo @ 0x1e8e3a0] Estimating duration from bitrate, this may be
inaccurate
ref.yuv: could not find codec parameters
-----------------------------------------------------
I know, my command has errors, but I don't have an idea as to how I
should test the scenario you mentioned. Could you please give me a
sample command line?
thanks.
-Sampath
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