4 files changed, 13 insertions, 5 deletions

diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts
index 01c3aa5f7..32bd3e44a 100644
--- a/server/helpers/ffmpeg-utils.ts
+++ b/server/helpers/ffmpeg-utils.ts
@@ -277,6 +277,7 @@ async function getLiveTranscodingCommand (options: {
       logger.debug('Apply ffmpeg live video params from %s using %s profile.', builderResult.encoder, profile, builderResult)
 
       command.outputOption(`${buildStreamSuffix('-c:v', i)} ${builderResult.encoder}`)
+      command.addInputOptions(builderResult.result.inputOptions)
       command.addOutputOptions(builderResult.result.outputOptions)
     }
 
@@ -294,6 +295,7 @@ async function getLiveTranscodingCommand (options: {
       logger.debug('Apply ffmpeg live audio params from %s using %s profile.', builderResult.encoder, profile, builderResult)
 
       command.outputOption(`${buildStreamSuffix('-c:a', i)} ${builderResult.encoder}`)
+      command.addInputOptions(builderResult.result.inputOptions)
       command.addOutputOptions(builderResult.result.outputOptions)
     }
 
@@ -605,6 +607,7 @@ async function presetVideo (
       localCommand.audioCodec(builderResult.encoder)
     }
 
+    command.addInputOptions(builderResult.result.inputOptions)
     command.addOutputOptions(builderResult.result.outputOptions)
     addDefaultEncoderParams({ command: localCommand, encoder: builderResult.encoder, fps })
   }
diff --git a/server/lib/video-transcoding-profiles.ts b/server/lib/video-transcoding-profiles.ts
index b7f9178c4..d802e2c9d 100644
--- a/server/lib/video-transcoding-profiles.ts
+++ b/server/lib/video-transcoding-profiles.ts
@@ -24,9 +24,10 @@ import { VIDEO_TRANSCODING_FPS } from '../initializers/constants'
 
 const defaultX264VODOptionsBuilder: EncoderOptionsBuilder = async ({ input, resolution, fps }) => {
   const targetBitrate = await buildTargetBitrate({ input, resolution, fps })
-  if (!targetBitrate) return { outputOptions: [ ] }
+  if (!targetBitrate) return { inputOptions: [ ], outputOptions: [ ] }
 
   return {
+    inputOptions: [ ],
     outputOptions: [
       `-preset veryfast`,
       `-r ${fps}`,
@@ -40,6 +41,7 @@ const defaultX264LiveOptionsBuilder: EncoderOptionsBuilder = async ({ resolution
   const targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
 
   return {
+    inputOptions: [ ],
     outputOptions: [
       `-preset veryfast`,
       `${buildStreamSuffix('-r:v', streamNum)} ${fps}`,
@@ -55,7 +57,7 @@ const defaultAACOptionsBuilder: EncoderOptionsBuilder = async ({ input, streamNu
 
   if (await canDoQuickAudioTranscode(input, probe)) {
     logger.debug('Copy audio stream %s by AAC encoder.', input)
-    return { copy: true, outputOptions: [] }
+    return { copy: true, inputOptions: [ ], outputOptions: [ ] }
   }
 
   const parsedAudio = await getAudioStream(input, probe)
@@ -70,14 +72,14 @@ const defaultAACOptionsBuilder: EncoderOptionsBuilder = async ({ input, streamNu
   logger.debug('Calculating audio bitrate of %s by AAC encoder.', input, { bitrate: parsedAudio.bitrate, audioCodecName })
 
   if (bitrate !== undefined && bitrate !== -1) {
-    return { outputOptions: [ buildStreamSuffix('-b:a', streamNum), bitrate + 'k' ] }
+    return { inputOptions: [ ], outputOptions: [ buildStreamSuffix('-b:a', streamNum), bitrate + 'k' ] }
   }
 
-  return { outputOptions: [ ] }
+  return { inputOptions: [ ], outputOptions: [ ] }
 }
 
 const defaultLibFDKAACVODOptionsBuilder: EncoderOptionsBuilder = ({ streamNum }) => {
-  return { outputOptions: [ buildStreamSuffix('-q:a', streamNum), '5' ] }
+  return { inputOptions: [ ], outputOptions: [ buildStreamSuffix('-q:a', streamNum), '5' ] }
 }
 
 // Used to get and update available encoders
diff --git a/shared/models/videos/video-transcoding.model.ts b/shared/models/videos/video-transcoding.model.ts
index 06b555c16..52b468a96 100644
--- a/shared/models/videos/video-transcoding.model.ts
+++ b/shared/models/videos/video-transcoding.model.ts
@@ -12,6 +12,7 @@ export type EncoderOptionsBuilder = (params: {
 export interface EncoderOptions {
   copy?: boolean // Copy stream? Default to false
 
+  inputOptions: string[]
   outputOptions: string[]
 }
 
diff --git a/support/doc/plugins/guide.md b/support/doc/plugins/guide.md
index f5e753b79..18e962c10 100644
--- a/support/doc/plugins/guide.md
+++ b/support/doc/plugins/guide.md
@@ -342,6 +342,7 @@ async function register ({
 
       // You can also return a promise
       return {
+        inputOptions: [],
         outputOptions: [
         // Use a custom bitrate
           '-b' + streamString + ' 10K'
@@ -392,6 +393,7 @@ async function register ({
   {
     const builder = () => {
       return {
+        inputOptions: [],
         outputOptions: []
       }
     }