Support more codecs #10
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FelonEkonom
requested changes
Mar 25, 2025
lib/transcoder/video.ex
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| cpu_quota = :erlang.system_info(:cpu_quota) | ||
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| number_of_threads = | ||
| if cpu_quota != :unknown, | ||
| do: cpu_quota, | ||
| else: :erlang.system_info(:logical_processors_available) | ||
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| builder |> child(:vp8_encoder, %VP8.Encoder{g_threads: number_of_threads, cpu_used: 15}) | ||
| encoder = Module.concat(vpx, Encoder) |> struct!(g_threads: number_of_threads, cpu_used: 15) |
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I don't like calling struct!/2 as it allows to create a struct that misses some required fields and I am not sure if it supports non-nil default values
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I removed struct!() usage for both H26x and VPx
FelonEkonom
requested changes
Mar 25, 2025
FelonEkonom
requested changes
Mar 27, 2025
lib/transcoder.ex
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| Membrane.Logger.warning(""" | ||
| The only input stream format that can be assumed is | ||
| `%Membrane.RemoteStream{content_format: Membrane.MPEGAudio}`, while you wanted to assume: | ||
| #{inspect(stream_format)} | ||
| """) | ||
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| builder | ||
| |> child(:stream_format_changer, %Membrane.Transcoder.StreamFormatChanger{ | ||
| stream_format: stream_format | ||
| }) |
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I suggest to raise here, as the code won't act as the user assumed
lib/transcoder/audio.ex
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| defp maybe_plug_resampler(builder, input_format, %Opus{}) | ||
| when not is_opus_compliant(input_format) do | ||
| builder | ||
| |> child(:resampler, %Membrane.FFmpeg.SWResample.Converter{ | ||
| output_stream_format: %RawAudio{ | ||
| sample_format: :s16le, | ||
| sample_rate: 48_000, | ||
| channels: 1 | ||
| } | ||
| }) | ||
| end | ||
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| defp maybe_plug_resampler(builder, input_format, %AAC{}) | ||
| when not is_aac_compliant(input_format) do | ||
| builder | ||
| |> child(:resampler, %Membrane.FFmpeg.SWResample.Converter{ | ||
| output_stream_format: %RawAudio{ | ||
| sample_format: :s16le, | ||
| sample_rate: 44_100, | ||
| channels: 1 | ||
| } | ||
| }) | ||
| end | ||
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| defp maybe_plug_resampler(builder, input_format, %MPEGAudio{}) | ||
| when not is_mp3_compliant(input_format) do | ||
| builder | ||
| |> child(:resampler, %Membrane.FFmpeg.SWResample.Converter{ | ||
| output_stream_format: %RawAudio{sample_rate: 44_100, sample_format: :s32le, channels: 2} | ||
| }) |
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Looks very nice, but are you sure we don't want to plug resampler if e.g. input format doesn't have :channels field?
FelonEkonom
approved these changes
Apr 10, 2025
Co-authored-by: Feliks Pobiedziński <[email protected]>
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This PR adds support for:
TODO: