TheoraTestsuite

some samples to test your theora decoder

a decoder must play all these files without problems to comply with the theora specification.

320x240.ogg [0.3 MB]

• simplest example

320x240.ogv [0.3 MB]

• simple example with Skeleton Stream

320x240.skeleton+cmml.ogv [0.3 MB]

• simple example with Skeleton and CMML Stream; decoders should read the Skeleton stream to identify the other streams in Ogg and ignore those that are not supported by the application

pixel_aspect_ratio.ogg [1.8 MB]

• Aspect Ratio defined in header to 1.82/1 , it also has a theora comment header

videotestsrc-720x576-16-15.ogg [422K]

• Aspect Ratio defined in header to 1.33/1 (PAL DVD format)

322x242_not-divisible-by-sixteen-framesize.ogg [0.3 MB]

• both dimensions not divisible by 16 but still even - if you see a black border around the testimage you should have a look at the Spec/2.2 on page 22, to see how to use: ti.width, ti.height, ti.frame_width, ti.frame_height, ti.offset_x, ti.offset_y

[...]

• one dimension divisible by 16 while the other one isn't

[...]

• odd dimensions

chained_streams.ogg [2.4 MB]

• all other samples as a chained stream. (see Spec/A.3.1 on page 157)

multi2.ogg [171 K]

• another chained file

mobile_itu601_i_422.ogg [8 MB]

• 4:2:2 pixel format, in the original spec and supported by the mainline decoder since alpha8 and the mainline encoder since 1.1.

ducks_take_off_444_720p25.ogg [7.2 MB]

• Ogg Theora video 4:4:4 pixel format, 1280x720 pixels, 25 fps, 213 frames

stockholm-vfr.ogg [1.8 MB]

• Hybrid 24fps/30fps clip encoded as 120fps with dropped frames.

offset_test.ogv [0.2 MB] (10 frames, 1 fps, no visible movement, visible frame 512 x 512)

• Ogg Theora video with large offset, output should look like offset_test.pass.png, but not like offset_test.fail.png.

sign_irene_cif-3qi-b.ogg [1.3 MB]

• Ogg Theora video using 3qi (adaptive quantization).

chroma_siting_test.ogv [25K]

• Ogg Theora video chroma siting test.

Player compliance

• Firefox (3.6)
  • Seems to pass all tests (not sure about the 322x242 "not divisible by 16" - there is a black line ...)
  • But high requirements to play (especially large) videos, behaves badly if hardware is insufficient to play in real-time

• MPLAYER (r30886 2010-03-13)
  • OGG and Theora support has been inferior for years (but mostly worked with encoders from given era), improved at beginning of 2010
  • Recently fixed issues:
    • 4:2:2 and 4:4:4 support (in previous versions they did "play", but looking "strangely") List discussion BUG #1487
    • Some videos encoded with recent (1.1) encoders complaining about "invalid frames" or hanging BUG #1664
  • Remaining issues:
    • Offset test fails, shows what shouldn't be visible BUG #1492, open since 2009-06-14
    • Output to YUV4MPEG always downsampled to 4:2:0 (flaw, no Bugzilla entry exists)

• VLC 1.0.5
  • Theora decoder seems fully compliant, tiny problems specific to some videos or systems (fixing in progress)
  • Video duration is reported badly or not at all

• DUGL Player 0.44
  • Theora decoder seems fully compliant, but no sound yet