Some video formats, such as WebM, do not store duration information at
the level of the video stream. Instead, the duration is stored as part
of the container format information.
This commit modifies `VideoAnalyzer` to use the duration from the video
container when the duration from the video stream is not available.
Fixes#40130.
This reverts commit a307c697b2, reversing
changes made to f30f76af74.
Reason: This assertion is not failed even without this PR since both
ffprobe versions (3.2.14 and 4.1.3) return the same duration 5.166648
for `video.mp4`.
So there is no need to touch this assertion at this point.
Our CI environment is upgraded from stretch to buster then ffprove
version is also upgraded from 3.2.14 to 4.1.3.
https://packages.debian.org/stretch/ffmpeghttps://packages.debian.org/buster/ffmpeg
Somehow those ffprove returns different metadata for
`rotated_video.mp4`.
```
$ ffprobe -print_format json -show_streams -v error rotated_video.mp4 > ffprobe41.json
$ diff -ub ffprobe32.json ffprobe41.json
--- ffprobe32.json 2019-07-14 20:02:13.000000000 +0900
+++ ffprobe41.json 2019-07-14 19:59:08.000000000 +0900
@@ -27,8 +27,8 @@
"time_base": "1/17594",
"start_pts": 3976,
"start_time": "0.225986",
- "duration_ts": 91981,
- "duration": "5.227975",
+ "duration_ts": 88000,
+ "duration": "5.001705",
"bit_rate": "321546",
"bits_per_raw_sample": "8",
"nb_frames": "44",
@@ -78,8 +78,8 @@
"time_base": "1/44100",
"start_pts": 0,
"start_time": "0.000000",
- "duration_ts": 227865,
- "duration": "5.167007",
+ "duration_ts": 227850,
+ "duration": "5.166667",
"bit_rate": "109732",
"max_bit_rate": "109732",
"nb_frames": "223",
```
In the case on the `test "analyzing a rotated video"`, most important
part is `assert_equal 90, metadata[:angle]`, the accidental difference
of duration for ffprove version is out of scope for the test.
ImageAnalyzerTest and VideoAnalyzerTest are defining the same helper,
since both use `#create_file_blob` that is defined in TestHelper, it
makes sense to move `#extract_metadata_from` to that side.
Shouichi Kamiya