Write the MA1B brand correctly #2515
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A partial fix for AOMediaCodec#2514.
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| // or lower. | ||
| if (item->av1C.seqProfile != 0 || item->av1C.seqLevelIdx0 > 13) { | ||
| isMA1B = AVIF_FALSE; | ||
| } |
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Yannis: I am not that familiar with this code. It is important that this for loop (which starts at line 3138) is executed for both image items and image sequences, and that we enter the if (item->encodeOutput->samples.count > 0) block (which starts at line 3140) at least once. Otherwise we will incorrectly report that isMA1B is true (the initial value). Please check this. Thanks!
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Here is my understanding:
- A track exists in
avifEncoderonly if the corresponding item is present too, likely with the first frame of the sequence being used as the image item data. - There is no change of profile/level within a single sequence.
Assuming this is correct, the for loop and the MA1B check look good.
| } // | ||
| if ((imageMetadata->depth == 8) || (imageMetadata->depth == 10)) { // | ||
| if (imageMetadata->yuvFormat == AVIF_PIXEL_FORMAT_YUV444) { // | ||
| AVIF_CHECKRES(avifRWStreamWriteChars(&s, "MA1A", 4)); // ... compatible_brands[] |
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Are the constraints listed in https://aomediacodec.github.io/av1-avif/v1.1.0.html#advanced-profile always true here?
Note that they differ for items and sequences.
| // or lower. | ||
| if (item->av1C.seqProfile != 0 || item->av1C.seqLevelIdx0 > 13) { | ||
| isMA1B = AVIF_FALSE; | ||
| } |
There was a problem hiding this comment.
Here is my understanding:
- A track exists in
avifEncoderonly if the corresponding item is present too, likely with the first frame of the sequence being used as the image item data. - There is no change of profile/level within a single sequence.
Assuming this is correct, the for loop and the MA1B check look good.
A partial fix for #2514.