spdl.io.BSF¶

class BSF(codec: TCodec, bsf: str)[source]¶

Apply bitstream filtering on packets object.

The primal usecase of BFS in SPDL is to convert the H264 video packets to Annex B for video decoding.

See also

https://ffmpeg.org/ffmpeg-bitstream-filters.html: The list of available bitstream filters and their usage.
NvDecDecoder: NVDEC decoding requires the input video packets to be Annex B.
apply_bsf(): Applies bitstream filtering to the packet as one-off operation.

Example

src = “foo.mp4” demuxer = spdl.io.Demuxer(src) # Note: When demuxing in streaming fashion, the packets does not have codec information. # To initialize BSF, the codec must be retrieved from Demuxer class. bsf = spdl.io.BSF(demuxer.video_codec)

for packets in demuxer.streaming_demux_video(…):: packets = bsf.filter(packets)

…

packets = bsf.flush() …

Parameters:: codec – The input codec.

Methods

`filter`(packets[, flush])	Apply the filter to the input packets
`flush`()

filter(packets: TPackets, flush: bool = False) → TPackets | None[source]¶

Apply the filter to the input packets

Parameters:

packets – The input packets.
flush – If True, then notify the filter that this is the end of the stream and let it flush the internally buffered packets.

Returns:

Filtered packet object or None if the internal filtering mechanism holds the packets and does not return any packet.

flush() → TPackets | None[source]¶