Refactor rtcp synchronization

lib/pipeline.ex

@@ -221,6 +221,9 @@ defmodule RecordingConverter.Pipeline do
       depayloader: Membrane.RTP.H264.Depayloader,
       clock_rate: track["clock_rate"]
     })
+    |> child({:rtcp_sync, track.id}, %RecordingConverter.RTCPSynchronizer{
+      clock_rate: track["clock_rate"]
+    })
     |> child({:input_parser, track.id}, %Membrane.H264.Parser{
       output_alignment: :nalu,
       output_stream_structure: :annexb

lib/report_parser.ex

@@ -17,6 +17,7 @@ defmodule RecordingConverter.ReportParser do
       calculate_duration_in_ns(track) < Compositor.avatar_threshold_ns()
     end)
     |> Enum.map(fn {key, value} -> Map.put(value, :id, key) end)
+    |> recalculate_offsets()
   end
 
   @spec get_all_track_actions(tracks :: list()) :: list()
@@ -153,4 +154,47 @@ defmodule RecordingConverter.ReportParser do
       nil
     end
   end
+
+  # Not every track will have a `start_timestamp_wallclock` value since this requires an RTCP sender packet.
+  # For this reason, the algorithm does not override track offsets lacking a `start_timestamp_wallclock`.
+  # However, for tracks that do come with a `start_timestamp_wallclock` value
+  # the algorithm recalculates the offset using the following formula:
+  # new_offset = ft.offset + (ct.start_timestamp_wallclock - ft.start_timstamp_wallclock)
+  # where:
+  #   * ft - first track that have `start_timestamp_wallclock` value set
+  #   * ct - current track for wchich we calculate new offset
+  defp recalculate_offsets(tracks) do
+    {tracks, _acc} =
+      tracks
+      |> Enum.sort_by(fn track -> track["offset"] end)
+      |> Enum.map_reduce(nil, fn track, acc ->
+        cond do
+          not Map.has_key?(track, "start_timestamp_wallclock") ->
+            {track, acc}
+
+          is_nil(acc) ->
+            {track, track}
+
+          true ->
+            offset =
+              acc["offset"] + track["start_timestamp_wallclock"] -
+                acc["start_timestamp_wallclock"]
+
+            {%{track | "offset" => trunc(offset)}, acc}
+        end
+      end)
+
+    %{"offset" => first_offset} =
+      Enum.min_by(tracks, fn track -> track["offset"] end, fn -> %{"offset" => 0} end)
+
+    if first_offset > 0,
+      do:
+        raise("The lower track offset is #{first_offset}, this offset cannot be greater than 0.")
+
+    # After RTCP synchronization, tracks can switch places.
+    # For example, a track that was second before synchronization can now be first.
+    # In this case, it will have a negative offset and we will need to correct it to 0.
+    # We also need to correct all other offsets to maintain the correct offsets between tracks.
+    Enum.map(tracks, fn track -> Map.update!(track, "offset", &(&1 - first_offset)) end)
+  end
 end

mix.lock

@@ -15,7 +15,7 @@
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
   "ex_aws": {:hex, :ex_aws, "2.5.3", "9c2d05ba0c057395b12c7b5ca6267d14cdaec1d8e65bdf6481fe1fd245accfb4", [:mix], [{:configparser_ex, "~> 4.0", [hex: :configparser_ex, repo: "hexpm", optional: true]}, {:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: true]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: true]}, {:jsx, "~> 2.8 or ~> 3.0", [hex: :jsx, repo: "hexpm", optional: true]}, {:mime, "~> 1.2 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:sweet_xml, "~> 0.7", [hex: :sweet_xml, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "67115f1d399d7ec4d191812ee565c6106cb4b1bbf19a9d4db06f265fd87da97e"},
   "ex_aws_s3": {:hex, :ex_aws_s3, "2.5.3", "422468e5c3e1a4da5298e66c3468b465cfd354b842e512cb1f6fbbe4e2f5bdaf", [:mix], [{:ex_aws, "~> 2.0", [hex: :ex_aws, repo: "hexpm", optional: false]}, {:sweet_xml, ">= 0.0.0", [hex: :sweet_xml, repo: "hexpm", optional: true]}], "hexpm", "4f09dd372cc386550e484808c5ac5027766c8d0cd8271ccc578b82ee6ef4f3b8"},
-  "ex_doc": {:hex, :ex_doc, "0.33.0", "690562b153153c7e4d455dc21dab86e445f66ceba718defe64b0ef6f0bd83ba0", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "3f69adc28274cb51be37d09b03e4565232862a4b10288a3894587b0131412124"},
+  "ex_doc": {:hex, :ex_doc, "0.34.0", "ab95e0775db3df71d30cf8d78728dd9261c355c81382bcd4cefdc74610bef13e", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "60734fb4c1353f270c3286df4a0d51e65a2c1d9fba66af3940847cc65a8066d7"},
   "ex_sdp": {:hex, :ex_sdp, "0.15.0", "53815fb5b5e4fae0f3b26de90f372446bb8e0eed62a3cc20394d3c29519698be", [:mix], [{:bunch, "~> 1.3", [hex: :bunch, repo: "hexpm", optional: false]}, {:elixir_uuid, "~> 1.2", [hex: :elixir_uuid, repo: "hexpm", optional: false]}], "hexpm", "d3f23596b73e7057521ff0f0d55b1189c6320a2f04388aa3a80a0aa97ffb379f"},
   "excoveralls": {:hex, :excoveralls, "0.15.3", "54bb54043e1cf5fe431eb3db36b25e8fd62cf3976666bafe491e3fa5e29eba47", [:mix], [{:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "f8eb5d8134d84c327685f7bb8f1db4147f1363c3c9533928234e496e3070114e"},
   "file_system": {:hex, :file_system, "1.0.0", "b689cc7dcee665f774de94b5a832e578bd7963c8e637ef940cd44327db7de2cd", [:mix], [], "hexpm", "6752092d66aec5a10e662aefeed8ddb9531d79db0bc145bb8c40325ca1d8536d"},
@@ -25,7 +25,6 @@
   "hpax": {:hex, :hpax, "0.2.0", "5a58219adcb75977b2edce5eb22051de9362f08236220c9e859a47111c194ff5", [:mix], [], "hexpm", "bea06558cdae85bed075e6c036993d43cd54d447f76d8190a8db0dc5893fa2f1"},
   "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
   "jason": {:hex, :jason, "1.4.1", "af1504e35f629ddcdd6addb3513c3853991f694921b1b9368b0bd32beb9f1b63", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fbb01ecdfd565b56261302f7e1fcc27c4fb8f32d56eab74db621fc154604a7a1"},
-  "logger_backends": {:hex, :logger_backends, "1.0.0", "09c4fad6202e08cb0fbd37f328282f16539aca380f512523ce9472b28edc6bdf", [:mix], [], "hexpm", "1faceb3e7ec3ef66a8f5746c5afd020e63996df6fd4eb8cdb789e5665ae6c9ce"},
   "makeup": {:hex, :makeup, "1.1.2", "9ba8837913bdf757787e71c1581c21f9d2455f4dd04cfca785c70bbfff1a76a3", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "cce1566b81fbcbd21eca8ffe808f33b221f9eee2cbc7a1706fc3da9ff18e6cac"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.2", "627e84b8e8bf22e60a2579dad15067c755531fea049ae26ef1020cad58fe9578", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "41193978704763f6bbe6cc2758b84909e62984c7752b3784bd3c218bb341706b"},
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.0", "6f0eff9c9c489f26b69b61440bf1b238d95badae49adac77973cbacae87e3c2e", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "ea7a9307de9d1548d2a72d299058d1fd2339e3d398560a0e46c27dab4891e4d2"},
@@ -36,15 +35,15 @@
   "membrane_cmaf_format": {:hex, :membrane_cmaf_format, "0.7.1", "9ea858faefdcb181cdfa8001be827c35c5f854e9809ad57d7062cff1f0f703fd", [:mix], [], "hexpm", "3c7b4ed2a986e27f6f336d2f19e9442cb31d93b3142fc024c019572faca54a73"},
   "membrane_common_c": {:hex, :membrane_common_c, "0.16.0", "caf3f29d2f5a1d32d8c2c122866110775866db2726e4272be58e66dfdf4bce40", [:mix], [{:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:shmex, "~> 0.5.0", [hex: :shmex, repo: "hexpm", optional: false]}, {:unifex, "~> 1.0", [hex: :unifex, repo: "hexpm", optional: false]}], "hexpm", "a3c7e91de1ce1f8b23b9823188a5d13654d317235ea0ca781c05353ed3be9b1c"},
   "membrane_core": {:hex, :membrane_core, "1.0.1", "08aa546c0d131c66f8b906b3dfb2b8f2749b56859f6fc52bd3ac846b944b3baa", [:mix], [{:bunch, "~> 1.6", [hex: :bunch, repo: "hexpm", optional: false]}, {:qex, "~> 0.3", [hex: :qex, repo: "hexpm", optional: false]}, {:ratio, "~> 3.0", [hex: :ratio, repo: "hexpm", optional: false]}, {:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "a35ed68561bdf0a2dbb2f994333be78cf4e1c4d734e4cd927d77d92049bb1273"},
-  "membrane_file_plugin": {:hex, :membrane_file_plugin, "0.17.0", "e855a848e84eaed537b41fd4436712038fc5518059eadc8609c83cd2d819653a", [:mix], [{:logger_backends, "~> 1.0", [hex: :logger_backends, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}], "hexpm", "9c3653ca9f13bb409b36257d6094798d4625c739ab7a4035c12308622eb16e0b"},
+  "membrane_file_plugin": {:hex, :membrane_file_plugin, "0.16.0", "7917f6682c22b9bcfc2ca20ed960eee0f7d03ad31fd5f59ed850f1fe3ddd545a", [:mix], [{:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}], "hexpm", "b0727998f75a9b4dab8a2baefdfc13c3eac00a04e061ab1b0e61dc5566927acc"},
   "membrane_funnel_plugin": {:hex, :membrane_funnel_plugin, "0.9.0", "9cfe09e44d65751f7d9d8d3c42e14797f7be69e793ac112ea63cd224af70a7bf", [:mix], [{:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}], "hexpm", "988790aca59d453a6115109f050699f7f45a2eb6a7f8dc5c96392760cddead54"},
   "membrane_h264_format": {:hex, :membrane_h264_format, "0.6.1", "44836cd9de0abe989b146df1e114507787efc0cf0da2368f17a10c47b4e0738c", [:mix], [], "hexpm", "4b79be56465a876d2eac2c3af99e115374bbdc03eb1dea4f696ee9a8033cd4b0"},
   "membrane_h265_format": {:hex, :membrane_h265_format, "0.2.0", "1903c072cf7b0980c4d0c117ab61a2cd33e88782b696290de29570a7fab34819", [:mix], [], "hexpm", "6df418bdf242c0d9f7dbf2e5aea4c2d182e34ac9ad5a8b8cef2610c290002e83"},
   "membrane_h26x_plugin": {:hex, :membrane_h26x_plugin, "0.10.2", "caf2790d8c107df35f8d456b45f4e09fb9c56ce6c7669a3a03f7d59972e6ed82", [:mix], [{:bunch, "~> 1.4", [hex: :bunch, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:membrane_h264_format, "~> 0.6.0", [hex: :membrane_h264_format, repo: "hexpm", optional: false]}, {:membrane_h265_format, "~> 0.2.0", [hex: :membrane_h265_format, repo: "hexpm", optional: false]}], "hexpm", "becf1ac4a589adecd850137ccd61a33058f686083a514a7e39fcd721bcf9fb2e"},
-  "membrane_http_adaptive_stream_plugin": {:hex, :membrane_http_adaptive_stream_plugin, "0.18.4", "f938907eb0e39db2acf8c84e0b770c1976b2793bd58c2e37eca0334dc019f11d", [:mix], [{:bunch, "~> 1.6", [hex: :bunch, repo: "hexpm", optional: false]}, {:membrane_aac_plugin, "~> 0.18.0", [hex: :membrane_aac_plugin, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:membrane_h26x_plugin, "~> 0.10.0", [hex: :membrane_h26x_plugin, repo: "hexpm", optional: false]}, {:membrane_mp4_plugin, "~> 0.34.1", [hex: :membrane_mp4_plugin, repo: "hexpm", optional: false]}, {:membrane_tee_plugin, "~> 0.12.0", [hex: :membrane_tee_plugin, repo: "hexpm", optional: false]}, {:qex, "~> 0.5", [hex: :qex, repo: "hexpm", optional: false]}], "hexpm", "3f9174faf1f734f1b8507aeea0525384869797e51b88f1b2e33931bae9de32fc"},
+  "membrane_http_adaptive_stream_plugin": {:hex, :membrane_http_adaptive_stream_plugin, "0.18.3", "202d409bda5ff9e611d482b61c5fcc893c59905d92f3b8dd5d0288561449535c", [:mix], [{:bunch, "~> 1.6", [hex: :bunch, repo: "hexpm", optional: false]}, {:membrane_aac_plugin, "~> 0.18.0", [hex: :membrane_aac_plugin, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:membrane_h26x_plugin, "~> 0.10.0", [hex: :membrane_h26x_plugin, repo: "hexpm", optional: false]}, {:membrane_mp4_plugin, "~> 0.33.1", [hex: :membrane_mp4_plugin, repo: "hexpm", optional: false]}, {:membrane_tee_plugin, "~> 0.12.0", [hex: :membrane_tee_plugin, repo: "hexpm", optional: false]}, {:qex, "~> 0.5", [hex: :qex, repo: "hexpm", optional: false]}], "hexpm", "adb36192eba89e81d458c54eeccfee4da8d11ca78ee3488c57da4893203ed80d"},
   "membrane_live_compositor_plugin": {:git, "https://github.com/membraneframework/membrane_live_compositor_plugin.git", "f1290d0d32fe69b8c356ce9fb846a1ae4e76a5bf", [ref: "f1290d0d32fe69b8c356ce9fb846a1ae4e76a5bf"]},
   "membrane_mp4_format": {:hex, :membrane_mp4_format, "0.8.0", "8c6e7d68829228117d333b4fbb030e7be829aab49dd8cb047fdc664db1812e6a", [:mix], [], "hexpm", "148dea678a1f82ccfd44dbde6f936d2f21255f496cb45a22cc6eec427f025522"},
-  "membrane_mp4_plugin": {:hex, :membrane_mp4_plugin, "0.34.2", "6b40c919544dc62e87dd9022083c8e2fafbdc84f5806a475c96076f400ca9500", [:mix], [{:bunch, "~> 1.5", [hex: :bunch, repo: "hexpm", optional: false]}, {:membrane_aac_format, "~> 0.8.0", [hex: :membrane_aac_format, repo: "hexpm", optional: false]}, {:membrane_cmaf_format, "~> 0.7.0", [hex: :membrane_cmaf_format, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:membrane_file_plugin, "~> 0.17.0", [hex: :membrane_file_plugin, repo: "hexpm", optional: false]}, {:membrane_h264_format, "~> 0.6.1", [hex: :membrane_h264_format, repo: "hexpm", optional: false]}, {:membrane_h265_format, "~> 0.2.0", [hex: :membrane_h265_format, repo: "hexpm", optional: false]}, {:membrane_mp4_format, "~> 0.8.0", [hex: :membrane_mp4_format, repo: "hexpm", optional: false]}, {:membrane_opus_format, "~> 0.3.0", [hex: :membrane_opus_format, repo: "hexpm", optional: false]}], "hexpm", "70c081524507e849ac37c418ba3d598e00c76b89d0d59e130f45ff8183494192"},
+  "membrane_mp4_plugin": {:hex, :membrane_mp4_plugin, "0.33.1", "190ca3768333728e85dd831a9607c2b600a091463f2affdfe18123ed10c927e4", [:mix], [{:bunch, "~> 1.5", [hex: :bunch, repo: "hexpm", optional: false]}, {:membrane_aac_format, "~> 0.8.0", [hex: :membrane_aac_format, repo: "hexpm", optional: false]}, {:membrane_cmaf_format, "~> 0.7.0", [hex: :membrane_cmaf_format, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:membrane_file_plugin, "~> 0.16.0", [hex: :membrane_file_plugin, repo: "hexpm", optional: false]}, {:membrane_h264_format, "~> 0.6.1", [hex: :membrane_h264_format, repo: "hexpm", optional: false]}, {:membrane_h265_format, "~> 0.2.0", [hex: :membrane_h265_format, repo: "hexpm", optional: false]}, {:membrane_h26x_plugin, "~> 0.10.0", [hex: :membrane_h26x_plugin, repo: "hexpm", optional: false]}, {:membrane_mp4_format, "~> 0.8.0", [hex: :membrane_mp4_format, repo: "hexpm", optional: false]}, {:membrane_opus_format, "~> 0.3.0", [hex: :membrane_opus_format, repo: "hexpm", optional: false]}], "hexpm", "6c783ab882099461755a9cb3debc6c2b82137b1f9f5a7292be216f36dec187a3"},
   "membrane_opus_format": {:hex, :membrane_opus_format, "0.3.0", "3804d9916058b7cfa2baa0131a644d8186198d64f52d592ae09e0942513cb4c2", [:mix], [], "hexpm", "8fc89c97be50de23ded15f2050fe603dcce732566fe6fdd15a2de01cb6b81afe"},
   "membrane_opus_plugin": {:hex, :membrane_opus_plugin, "0.20.2", "f259a46f87c1749cd8dc8cbaf4b00df1085b39a8f0deef219a93ccda8cb54006", [:mix], [{:bunch, "~> 1.3", [hex: :bunch, repo: "hexpm", optional: false]}, {:bundlex, "~> 1.2", [hex: :bundlex, repo: "hexpm", optional: false]}, {:membrane_common_c, "~> 0.16.0", [hex: :membrane_common_c, repo: "hexpm", optional: false]}, {:membrane_core, "~> 1.0", [hex: :membrane_core, repo: "hexpm", optional: false]}, {:membrane_opus_format, "~> 0.3.0", [hex: :membrane_opus_format, repo: "hexpm", optional: false]}, {:membrane_precompiled_dependency_provider, "~> 0.1.0", [hex: :membrane_precompiled_dependency_provider, repo: "hexpm", optional: false]}, {:membrane_raw_audio_format, "~> 0.12.0", [hex: :membrane_raw_audio_format, repo: "hexpm", optional: false]}, {:unifex, "~> 1.0", [hex: :unifex, repo: "hexpm", optional: false]}], "hexpm", "4540615a49b3e3f008ba30532893ff1efb9d79b974e0b947efb92d49fc9cccbd"},
   "membrane_precompiled_dependency_provider": {:hex, :membrane_precompiled_dependency_provider, "0.1.2", "8af73b7dc15ba55c9f5fbfc0453d4a8edfb007ade54b56c37d626be0d1189aba", [:mix], [{:bundlex, "~> 1.4", [hex: :bundlex, repo: "hexpm", optional: false]}], "hexpm", "7fe3e07361510445a29bee95336adde667c4162b76b7f4c8af3aeb3415292023"},
@@ -66,7 +65,7 @@
   "mockery": {:hex, :mockery, "2.3.1", "a02fd60b10ac9ed37a7a2ecf6786c1f1dd5c75d2b079a60594b089fba32dc087", [:mix], [], "hexpm", "1d0971d88ebf084e962da3f2cfee16f0ea8e04ff73a7710428500d4500b947fa"},
   "mox": {:hex, :mox, "1.1.0", "0f5e399649ce9ab7602f72e718305c0f9cdc351190f72844599545e4996af73c", [:mix], [], "hexpm", "d44474c50be02d5b72131070281a5d3895c0e7a95c780e90bc0cfe712f633a13"},
   "muontrap": {:hex, :muontrap, "1.5.0", "bf5c273872379968615a39974458328209ac97fa1f588396192131ff973d1ca2", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "daf605e877f60b5be9215e3420d7971fc468677b29921e40915b15fd928273d4"},
-  "nimble_options": {:hex, :nimble_options, "1.1.0", "3b31a57ede9cb1502071fade751ab0c7b8dbe75a9a4c2b5bbb0943a690b63172", [:mix], [], "hexpm", "8bbbb3941af3ca9acc7835f5655ea062111c9c27bcac53e004460dfd19008a99"},
+  "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},
   "nimble_ownership": {:hex, :nimble_ownership, "0.3.1", "99d5244672fafdfac89bfad3d3ab8f0d367603ce1dc4855f86a1c75008bce56f", [:mix], [], "hexpm", "4bf510adedff0449a1d6e200e43e57a814794c8b5b6439071274d248d272a549"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
   "nimble_pool": {:hex, :nimble_pool, "1.1.0", "bf9c29fbdcba3564a8b800d1eeb5a3c58f36e1e11d7b7fb2e084a643f645f06b", [:mix], [], "hexpm", "af2e4e6b34197db81f7aad230c1118eac993acc0dae6bc83bac0126d4ae0813a"},

test/fixtures/one-audio/report.json

@@ -2,7 +2,7 @@
   "recording_id": "id",
   "tracks": {
     "audio_FC45E6CF26C7683C.msr": {
-      "offset": 3445500,
+      "offset": 0,
       "type": "audio",
       "encoding": "OPUS",
       "metadata": null,