86 lines
2.2 KiB
Markdown
86 lines
2.2 KiB
Markdown
pssh-box - Utility to parse and generate PSSH boxes
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===================================================
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## Prerequisite
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- Python 3.
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## Build the utility using Shaka Packager build setup
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The utility needs to be built before being used, i.e. do not use the script in
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`packager/tools/pssh/pssh_box.py` directly.
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If you have not set up the build environment for Shaka Packager, see
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https://github.com/shaka-project/shaka-packager/blob/master/docs/source/build_instructions.md.
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With the build environment set up, use `ninja` to build the utility:
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```bash
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$ ninja -C build/ pssh-box.py
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```
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Then you can use the built utility in `build/pssh-box.py`.
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## Usage
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All examples below assume that that `pssh-box.py` is in the `PATH` variable of
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the executing shell.
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### PSSH box generation
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The utility can be used to generate one or more PSSH boxes.
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An example to generate a Widevine PSSH with content-id 1234:
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```bash
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$ pssh-box.py --widevine-system-id --content-id 1234
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```
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It can be also be used to generate PSSH box from PSSH data (base64), e.g.
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```bash
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$ pssh-box.py --widevine-system-id --pssh-data AAAABCICEjQ=
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```
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The output can be in base64 form (`--base64`), in hex form (`--hex`) or in human
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readable form (`--human`). Human readable form is the default.
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An example to generate a Widevine PSSH with content-id 1234 in hex:
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```bash
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$ pssh-box.py --widevine-system-id --content-id 1234 --hex
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```
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Multiple boxes can be generated by separating boxes with `--`.
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An example to generate concatenated PSSHs with a Widevine PSSH with content-id
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1234 and a common PSSH with key-id 31323334353637383930313233343536 (hex form).
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```bash
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$ pssh-box.py \
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--widevine-system-id --content-id 1234 -- \
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--common-system-id --key-id 31323334353637383930313233343536
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```
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### PSSH box parsing
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The utility can be used to parse a single PSSH box or multiple concatenated PSSH
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boxes. The input can be in hex or in base64.
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```bash
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$ pssh-box.py --from-hex \
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000000247073736800000000EDEF8BA979D64ACEA3C827DCD51D21ED0000000422021234
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```
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```bash
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$ pssh-box.py --from-base64 AAAAJHBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAAQiAhI0
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```
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### More options
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Run the utility with no arguments to see the full list of options.
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```bash
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$ pssh-box.py
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```
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