| 1 | /*
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| 2 | I ran these two tests:
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| 3 | testcase | ffmpeg -v 9 -loglevel 99 -f rawvideo -video_size 256x256 -pix_fmt bgr24 -i - -sws_flags lanczos -f rawvideo -pix_fmt yuv420p out1.raw
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| 4 | testcase | ffmpeg -v 9 -loglevel 99 -f rawvideo -video_size 256x256 -pix_fmt bgr24 -i - -filter format=rgb24 -sws_flags lanczos -f rawvideo -pix_fmt yuv420p out2.raw
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| 5 |
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| 6 | Full console output is below. testcase the executable built from this source file.
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| 7 |
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| 8 |
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| 9 |
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| 10 |
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| 11 |
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| 12 |
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| 13 | testcase | ffmpeg -v 9 -loglevel 99 -f rawvideo -video_size 256x256 -pix_fmt bgr24 -i - -sws_flags lanczos -f rawvideo -pix_fmt yuv420p out1.raw
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| 14 |
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| 15 | ffmpeg version N-37541-g670229e Copyright (c) 2000-2012 the FFmpeg developers
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| 16 | built on Feb 3 2012 20:07:47 with gcc 4.6.2
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| 17 | configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
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| 18 | ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
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| 19 | ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
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| 20 | able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
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| 21 | -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
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| 22 | c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
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| 23 | libxvid --enable-zlib
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| 24 | libavutil 51. 37.100 / 51. 37.100
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| 25 | libavcodec 54. 0.102 / 54. 0.102
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| 26 | libavformat 54. 0.100 / 54. 0.100
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| 27 | libavdevice 53. 4.100 / 53. 4.100
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| 28 | libavfilter 2. 61.100 / 2. 61.100
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| 29 | libswscale 2. 1.100 / 2. 1.100
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| 30 | libswresample 0. 6.100 / 0. 6.100
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| 31 | libpostproc 52. 0.100 / 52. 0.100
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| 32 | [rawvideo @ 003A98E0] All info found
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| 33 | [rawvideo @ 003A98E0] Estimating duration from bitrate, this may be inaccurate
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| 34 | Input #0, rawvideo, from 'pipe:':
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| 35 | Duration: N/A, start: 0.000000, bitrate: N/A
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| 36 | Stream #0:0, 1, 1/25: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 256x256
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| 37 | , 1/25, 25 tbr, 25 tbn, 25 tbc
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| 38 | [buffer @ 003AFE80] w:256 h:256 pixfmt:bgr24 tb:1/1000000 sar:0/1 sws_param:
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| 39 | [buffersink @ 003AFF60] auto-inserting filter 'auto-inserted scale 0' between th
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| 40 | e filter 'src' and the filter 'out'
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| 41 | [scale @ 038540E0] w:256 h:256 fmt:bgr24 -> w:256 h:256 fmt:yuv420p flags:0x200
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| 42 | Output #0, rawvideo, to 'out1.raw':
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| 43 | Metadata:
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| 44 | encoder : Lavf54.0.100
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| 45 | Stream #0:0, 0, 1/90000: Video: rawvideo (I420 / 0x30323449), yuv420p, 256x2
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| 46 | 56, 1/25, q=2-31, 200 kb/s, 90k tbn, 25 tbc
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| 47 | Stream mapping:
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| 48 | Stream #0:0 -> #0:0 (rawvideo -> rawvideo)
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| 49 | frame= 1 fps= 0 q=0.0 Lsize= 96kB time=00:00:00.04 bitrate=19660.8kbits
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| 50 | /s
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| 51 | video:96kB audio:0kB global headers:0kB muxing overhead 0.000000%
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| 52 |
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| 53 | testcase | ffmpeg -v 9 -loglevel 99 -f rawvideo -video_size 256x256 -pix_fmt bgr24 -i - -filter format=rgb24 -sws_flags lanczos -f rawvideo -pix_fmt yuv420p out2.raw
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| 54 |
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| 55 | ffmpeg version N-37541-g670229e Copyright (c) 2000-2012 the FFmpeg developers
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| 56 | built on Feb 3 2012 20:07:47 with gcc 4.6.2
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| 57 | configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
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| 58 | ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
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| 59 | ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
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| 60 | able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
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| 61 | -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
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| 62 | c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
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| 63 | libxvid --enable-zlib
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| 64 | libavutil 51. 37.100 / 51. 37.100
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| 65 | libavcodec 54. 0.102 / 54. 0.102
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| 66 | libavformat 54. 0.100 / 54. 0.100
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| 67 | libavdevice 53. 4.100 / 53. 4.100
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| 68 | libavfilter 2. 61.100 / 2. 61.100
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| 69 | libswscale 2. 1.100 / 2. 1.100
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| 70 | libswresample 0. 6.100 / 0. 6.100
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| 71 | libpostproc 52. 0.100 / 52. 0.100
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| 72 | [rawvideo @ 00369980] All info found
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| 73 | [rawvideo @ 00369980] Estimating duration from bitrate, this may be inaccurate
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| 74 | Input #0, rawvideo, from 'pipe:':
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| 75 | Duration: N/A, start: 0.000000, bitrate: N/A
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| 76 | Stream #0:0, 1, 1/25: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 256x256
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| 77 | , 1/25, 25 tbr, 25 tbn, 25 tbc
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| 78 | [buffer @ 00369E80] w:256 h:256 pixfmt:bgr24 tb:1/1000000 sar:0/1 sws_param:
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| 79 | [buffersink @ 03973700] auto-inserting filter 'auto-inserted scale 0' between th
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| 80 | e filter 'Parsed_format_0' and the filter 'out'
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| 81 | [format @ 03973960] auto-inserting filter 'auto-inserted scale 1' between the fi
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| 82 | lter 'src' and the filter 'Parsed_format_0'
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| 83 | [scale @ 03974880] w:256 h:256 fmt:bgr24 -> w:256 h:256 fmt:rgb24 flags:0x200
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| 84 | [scale @ 03973900] w:256 h:256 fmt:rgb24 -> w:256 h:256 fmt:yuv420p flags:0x200
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| 85 | Output #0, rawvideo, to 'out2.raw':
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| 86 | Metadata:
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| 87 | encoder : Lavf54.0.100
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| 88 | Stream #0:0, 0, 1/90000: Video: rawvideo (I420 / 0x30323449), yuv420p, 256x2
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| 89 | 56, 1/25, q=2-31, 200 kb/s, 90k tbn, 25 tbc
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| 90 | Stream mapping:
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| 91 | Stream #0:0 -> #0:0 (rawvideo -> rawvideo)
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| 92 | frame= 1 fps= 0 q=0.0 Lsize= 96kB time=00:00:00.04 bitrate=19660.8kbits
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| 93 | /s
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| 94 | video:96kB audio:0kB global headers:0kB muxing overhead 0.000000%
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| 95 |
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| 96 | */
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| 97 |
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| 98 |
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| 99 | #include <stdio.h>
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| 100 |
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| 101 | #ifdef WIN32
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| 102 | #include <fcntl.h>
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| 103 | #endif
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| 104 |
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| 105 | int main (void)
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| 106 | {
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| 107 | int i, j;
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| 108 | #ifdef WIN32
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| 109 | setmode (fileno (stdout), O_BINARY);
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| 110 | setmode (fileno (stdin), O_BINARY);
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| 111 | #endif
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| 112 |
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| 113 |
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| 114 | for (j = 0; j < 256; j++)
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| 115 | {
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| 116 | for (i = 0; i < 256; i++)
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| 117 | {
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| 118 | // format is bgr24
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| 119 | // b: 0 to 240 step 16 in vertical 16 pixel stripes
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| 120 | putchar (j / 16 * 16);
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| 121 | // g: 0 to 240 step 16 in horizontal 16 pixel stripes
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| 122 | putchar (i / 16 * 16);
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| 123 | // r: constant 128
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| 124 | putchar (128);
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| 125 | }
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| 126 | }
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| 127 | return 0;
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| 128 | }
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| 129 |
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