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ffmpeg/tests/ref/fate/filter-scale2ref_keep_aspect

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FATE: Add test for libavfilter/scale2ref This new FATE test for the scale2ref filter makes use of the recently added scale2ref-specific variables to maintain the aspect ratio of a test input. Filtergraph explanation: [main] has an AR of 4:3. [ref] has an AR of 16:9. 640 / 4 = 160. So the new width for [main] is 160. 160 / ((320 / 240) * (1 / 1)) = 160 / (4 / 3) = 120. So the new height for [main] is 120. 160 / 120 = 4 / 3 so [main]'s aspect ratio has been maintained while using [ref]'s width as a reference point. [ref] is nullsink'd since it is left unchanged by scale2ref (and so shouldn't need to be tested). If we were to use "iw/4:-1" in place of "iw/4:ow/mdar": 640 / 4 = 160. So the new width for [main] would be 160. 360 / 4 = 90. So the new height for [main] would be 90. 160 / 90 = 16 / 9 so [main] now has the same aspect ratio as [ref] which is probably what you do not want. This is currently the only test for scale2ref. Signed-off-by: Kevin Mark <kmark937@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2017-06-04 07:53:31 +00:00
#format: frame checksums
#version: 2
#hash: MD5
#tb 0: 1/25
#media_type 0: video
#codec_id 0: rawvideo
#dimensions 0: 160x120
libavfilter/scale2ref: Maintain main input's DAR The scale2ref filter will now maintain the DAR of the main input and not the DAR of the reference input. This previous behavior was deemed counterintuitive for most (all?) use-cases. Before: scale2ref=iw/4:ow/mdar in w:320 h:240 fmt:rgb24 sar:1/1 ref w:640 h:360 fmt:rgb24 sar:1/1 out w:160 h:120 fmt:rgb24 sar:4/3 flags:0x2 SAR: ((120 * 640) / (160 * 360)) * (1 / 1) = 4 / 3 DAR: (160 / 120) * (4 / 3) = 16 / 9 (main out now same DAR as ref) Now: scale2ref=iw/4:ow/mdar in w:320 h:240 fmt:rgb24 sar:1/1 ref w:640 h:360 fmt:rgb24 sar:1/1 out w:160 h:120 fmt:rgb24 sar:1/1 flags:0x2 SAR: ((120 * 320) / (160 * 240)) * (1 / 1) = 1 / 1 DAR: (160 / 120) * (1 / 1) = 4 / 3 (main out same DAR as main in) The scale2ref FATE test has also been updated. Signed-off-by: Kevin Mark <kmark937@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2017-06-05 10:55:21 +00:00
#sar 0: 1/1
FATE: Add test for libavfilter/scale2ref This new FATE test for the scale2ref filter makes use of the recently added scale2ref-specific variables to maintain the aspect ratio of a test input. Filtergraph explanation: [main] has an AR of 4:3. [ref] has an AR of 16:9. 640 / 4 = 160. So the new width for [main] is 160. 160 / ((320 / 240) * (1 / 1)) = 160 / (4 / 3) = 120. So the new height for [main] is 120. 160 / 120 = 4 / 3 so [main]'s aspect ratio has been maintained while using [ref]'s width as a reference point. [ref] is nullsink'd since it is left unchanged by scale2ref (and so shouldn't need to be tested). If we were to use "iw/4:-1" in place of "iw/4:ow/mdar": 640 / 4 = 160. So the new width for [main] would be 160. 360 / 4 = 90. So the new height for [main] would be 90. 160 / 90 = 16 / 9 so [main] now has the same aspect ratio as [ref] which is probably what you do not want. This is currently the only test for scale2ref. Signed-off-by: Kevin Mark <kmark937@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2017-06-04 07:53:31 +00:00
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