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AMD VCE 265 has a input file bitrate dependent output bitrate #3447

Closed
PMunkes opened this issue Mar 2, 2021 · 10 comments
Closed

AMD VCE 265 has a input file bitrate dependent output bitrate #3447

PMunkes opened this issue Mar 2, 2021 · 10 comments
Labels
Bug
Milestone
1.4.0

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@PMunkes
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PMunkes commented Mar 2, 2021 •
edited
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With a 500MBit/s input video file it is not possible to produce an output file with a bitrate below ~36MBit/s.
Irrespective of the selected output bitrate, the resulting file always has a bitrate of about 36MBit/s.
Transcoding the video once and re-transcoding it again reduces the resulting bit rate.

"Transcoding" the file using OBS works without issues.

HandBrake version (e.g., 1.3.0):

Handbrake 1.3.3

Operating system and version (e.g., Ubuntu 19.10, macOS 10.15 Catalina, Windows 10 1909):

Windows 10 20H2

Error message text and/or screenshot:

The files in the screenshots are 17 seconds long.

grafik grafik

HandBrake Activity Log:

HandBrake 1.3.3 (2020061300)
OS: Microsoft Windows NT 10.0.19042.0
CPU: AMD Ryzen 7 5800X 8-Core Processor             
Ram: 32711 MB, 
GPU Information:
  Radeon (TM) RX 480 Graphics - 27.20.14535.1000
  AMD Radeon RX 6800 - 27.20.14535.1000
Screen: 2560x1440
Temp Dir: C:\Users\Philipp\AppData\Local\Temp\
Install Dir: C:\Program Files\HandBrake
Data Dir: C:\Users\Philipp\AppData\Roaming\HandBrake

-------------------------------------------


# Starting Encode ...

[12:48:25] base preset: Production Max (Modified)
[00:48:25] hb_init: starting libhb thread
[00:48:25] Starting work at: Wed Mar 03 00:48:25 2021
[00:48:25] 1 job(s) to process
[00:48:25] json job:
{
  "Audio": {
    "AudioList": [],
    "CopyMask": [
      "copy:aac",
      "copy:ac3",
      "copy:dtshd",
      "copy:dts",
      "copy:eac3",
      "copy:flac",
      "copy:mp3",
      "copy:truehd"
    ],
    "FallbackEncoder": "ac3"
  },
  "Destination": {
    "ChapterList": [
      {
        "Name": "Chapter 1"
      }
    ],
    "ChapterMarkers": true,
    "AlignAVStart": false,
    "File": "F:\\Source 500Mbit X264-6k-vce265.m4v",
    "Mp4Options": {
      "IpodAtom": false,
      "Mp4Optimize": false
    },
    "Mux": "av_mp4"
  },
  "Filters": {
    "FilterList": [
      {
        "ID": 12,
        "Settings": {
          "crop-bottom": "0",
          "crop-left": "0",
          "crop-right": "0",
          "crop-top": "0",
          "height": "1440",
          "width": "2560"
        }
      },
      {
        "ID": 6,
        "Settings": {
          "mode": "1"
        }
      }
    ]
  },
  "PAR": {
    "Num": 1,
    "Den": 1
  },
  "Metadata": {},
  "SequenceID": 0,
  "Source": {
    "Angle": 1,
    "Range": {
      "Type": "chapter",
      "Start": 1,
      "End": 1
    },
    "Title": 1,
    "Path": "F:\\Downloads\\source_500mbit_x264.m4v"
  },
  "Subtitle": {
    "Search": {
      "Burn": false,
      "Default": false,
      "Enable": false,
      "Forced": false
    },
    "SubtitleList": []
  },
  "Video": {
    "Encoder": "vce_h265",
    "Level": "auto",
    "Bitrate": 6000,
    "TwoPass": false,
    "Turbo": false,
    "ColorMatrixCode": 0,
    "Options": "",
    "Preset": "quality",
    "Profile": "main",
    "QSV": {
      "Decode": false,
      "AsyncDepth": 0
    }
  }
}
[00:48:25] CPU: AMD Ryzen 7 5800X 8-Core Processor
[00:48:25]  - logical processor count: 16
[00:48:25] Intel Quick Sync Video support: no
[00:48:25] hb_scan: path=F:\Downloads\source_500mbit_x264.m4v, title_index=1
udfread ERROR: ECMA 167 Volume Recognition failed
src/libbluray/disc/disc.c:323: failed opening UDF image F:\Downloads\source_500mbit_x264.m4v
src/libbluray/disc/disc.c:424: error opening file BDMV\index.bdmv
src/libbluray/disc/disc.c:424: error opening file BDMV\BACKUP\index.bdmv
src/libbluray/bluray.c:2585: nav_get_title_list(F:\Downloads\source_500mbit_x264.m4v\) failed
[00:48:25] bd: not a bd - trying as a stream/file instead
libdvdnav: Using dvdnav version 6.0.1
libdvdread: Encrypted DVD support unavailable.
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[00:48:25] dvd: not a dvd - trying as a stream/file instead
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Downloads\source_500mbit_x264.m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2021-03-01T21:53:16.000000Z
    encoder         : HandBrake 1.3.3 2020061300
  Duration: 00:00:17.43, start: 0.000000, bitrate: 479967 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 2560x1440 [SAR 1:1 DAR 16:9], 479977 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
    Metadata:
      creation_time   : 2021-03-01T21:53:16.000000Z
      handler_name    : VideoHandler
[00:48:25] scan: decoding previews for title 1
[00:48:28] scan: 10 previews, 2560x1440, 60.000 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 1:1
[00:48:28] scan: supported video decoders: avcodec qsv
[00:48:28] libhb: scan thread found 1 valid title(s)
[00:48:28] Starting Task: Encoding Pass
[00:48:28] Skipping crop/scale filter
[00:48:28] work: only 1 chapter, disabling chapter markers
[00:48:28] job configuration:
[00:48:28]  * source
[00:48:28]    + F:\Downloads\source_500mbit_x264.m4v
[00:48:28]    + title 1, chapter(s) 1 to 1
[00:48:28]    + container: mov,mp4,m4a,3gp,3g2,mj2
[00:48:28]    + data rate: 479967 kbps
[00:48:28]  * destination
[00:48:28]    + F:\Source 500Mbit X264-6k-vce265.m4v
[00:48:28]    + container: MPEG-4 (libavformat)
[00:48:28]  * video track
[00:48:28]    + decoder: h264
[00:48:28]      + bitrate 479977 kbps
[00:48:28]    + filter
[00:48:28]      + Framerate Shaper (mode=1)
[00:48:28]        + frame rate: 60.000 fps -> constant 60.000 fps
[00:48:28]    + Output geometry
[00:48:28]      + storage dimensions: 2560 x 1440
[00:48:28]      + pixel aspect ratio: 1 : 1
[00:48:28]      + display dimensions: 2560 x 1440
[00:48:28]    + encoder: H.265 (AMD VCE)
[00:48:28]      + preset:  quality
[00:48:28]      + profile: main
[00:48:28]      + level:   auto
[00:48:28]      + bitrate: 6000 kbps, pass: 0
[00:48:28]      + color profile: 1-1-1
[00:48:28] sync: expecting 1046 video frames
[00:48:28] encavcodecInit: H.265 (AMD VCE)
[00:48:28] encavcodec: encoding at rc=vbr_peak Bitrate 6000
[00:48:28] encavcodec: encoding with stored aspect 1/1
[00:48:28] sync: first pts video is 0
[00:48:28] sync: "Chapter 1" (1) at frame 1 time 0
[00:48:39] reader: done. 1 scr changes
[00:48:40] work: average encoding speed for job is 92.708130 fps
[00:48:40] vfr: 1046 frames output, 0 dropped and 0 duped for CFR/PFR
[00:48:40] vfr: lost time: 0 (0 frames)
[00:48:40] vfr: gained time: 0 (0 frames) (0 not accounted for)
[00:48:40] h264-decoder done: 1046 frames, 0 decoder errors
[00:48:40] sync: got 1046 frames, 1046 expected
[00:48:40] sync: framerate min 60.000 fps, max 60.000 fps, avg 60.000 fps
[00:48:40] mux: track 0, 1046 frames, 80953042 bytes, 37113.14 kbps, fifo 256
[00:48:40] Finished work at: Wed Mar 03 00:48:40 2021
[00:48:40] libhb: work result = 0

# Encode Completed ...
@PMunkes PMunkes changed the title AMD VCE 265 has a input file bit rate dependent output bitrate AMD VCE 265 has a input file bitrate dependent output bitrate Mar 3, 2021
@galad87
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galad87 commented Mar 3, 2021

Maybe a duplicate of #2980

@PMunkes
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PMunkes commented Mar 3, 2021

It is at least slightly different, as the quality settings work. QP45 produced a file that was 1/7th the size of the QP 35.

@PMunkes PMunkes mentioned this issue Mar 3, 2021
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@PMunkes
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PMunkes commented Mar 3, 2021

I spun my own version updated to AMF 1.4.18 just now and the issue persists. I have filed an issue on the AMF Repo.

Log:

HandBrake Nightly 20210303115253-4dc9fadd7-patch-1 (2021030301)
OS: Microsoft Windows NT 10.0.19042.0
CPU: AMD Ryzen 7 5800X 8-Core Processor             
Ram: 32711 MB, 
GPU Information:
  AMD Radeon RX 6800 - 27.20.14535.1000
Screen: 2560x1440
Temp Dir: C:\Users\Philipp\AppData\Local\Temp\
Install Dir: C:\Program Files\HandBrake
Data Dir: C:\Users\Philipp\AppData\Roaming\HandBrake\Nightly

-------------------------------------------


# Starting Encode ...

[01:01:33] base preset: Production Max (Modified)
[13:01:33] hb_init: starting libhb thread
[13:01:33] Starting work at: Wed Mar 03 13:01:33 2021
[13:01:33] 1 job(s) to process
[13:01:33] json job:
{
  "Audio": {
    "AudioList": [],
    "CopyMask": [
      "copy:aac",
      "copy:ac3",
      "copy:dtshd",
      "copy:dts",
      "copy:eac3",
      "copy:flac",
      "copy:mp3",
      "copy:truehd"
    ],
    "FallbackEncoder": "ac3"
  },
  "Destination": {
    "ChapterList": [
      {
        "Name": "Chapter 1"
      }
    ],
    "ChapterMarkers": true,
    "AlignAVStart": false,
    "File": "F:\\Videos\\Source 500Mbit X264-vce265-4k.m4v",
    "Mp4Options": {
      "IpodAtom": false,
      "Mp4Optimize": false
    },
    "Mux": "av_mp4"
  },
  "Filters": {
    "FilterList": [
      {
        "ID": 12,
        "Settings": {
          "crop-bottom": "0",
          "crop-left": "0",
          "crop-right": "0",
          "crop-top": "0",
          "height": "1440",
          "width": "2560"
        }
      },
      {
        "ID": 6,
        "Settings": {
          "mode": "1"
        }
      }
    ]
  },
  "PAR": {
    "Num": 1,
    "Den": 1
  },
  "Metadata": {},
  "SequenceID": 0,
  "Source": {
    "Angle": 1,
    "Range": {
      "Type": "chapter",
      "Start": 1,
      "End": 1
    },
    "Title": 1,
    "Path": "F:\\Downloads\\source_500mbit_x264.m4v"
  },
  "Subtitle": {
    "Search": {
      "Burn": false,
      "Default": false,
      "Enable": false,
      "Forced": false
    },
    "SubtitleList": []
  },
  "Video": {
    "Encoder": "vce_h265",
    "Level": "auto",
    "Bitrate": 4000,
    "TwoPass": false,
    "Turbo": false,
    "ColorMatrixCode": 0,
    "Options": "",
    "Preset": "quality",
    "Profile": "main",
    "QSV": {
      "Decode": false,
      "AsyncDepth": 0
    }
  }
}
[13:01:33] CPU: AMD Ryzen 7 5800X 8-Core Processor
[13:01:33]  - logical processor count: 16
[13:01:33] Intel Quick Sync Video support: no
[13:01:33] hb_scan: path=F:\Downloads\source_500mbit_x264.m4v, title_index=1
udfread ERROR: ECMA 167 Volume Recognition failed
src/libbluray/disc/disc.c:323: failed opening UDF image F:\Downloads\source_500mbit_x264.m4v
src/libbluray/disc/disc.c:424: error opening file BDMV\index.bdmv
src/libbluray/disc/disc.c:424: error opening file BDMV\BACKUP\index.bdmv
src/libbluray/bluray.c:2585: nav_get_title_list(F:\Downloads\source_500mbit_x264.m4v\) failed
[13:01:33] bd: not a bd - trying as a stream/file instead
libdvdnav: Using dvdnav version 6.0.1
libdvdread: Encrypted DVD support unavailable.
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[13:01:33] dvd: not a dvd - trying as a stream/file instead
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Downloads\source_500mbit_x264.m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2021-03-01T21:53:16.000000Z
    encoder         : HandBrake 1.3.3 2020061300
  Duration: 00:00:17.43, start: 0.000000, bitrate: 479967 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 2560x1440 [SAR 1:1 DAR 16:9], 479977 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
    Metadata:
      creation_time   : 2021-03-01T21:53:16.000000Z
      handler_name    : VideoHandler
[13:01:33] scan: decoding previews for title 1
[13:01:35] scan: 10 previews, 2560x1440, 60.000 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 1:1, color profile: 1-1-1
[13:01:35] scan: supported video decoders: avcodec qsv
[13:01:35] libhb: scan thread found 1 valid title(s)
[13:01:36] Starting Task: Encoding Pass
[13:01:36] Skipping crop/scale filter
[13:01:36] work: only 1 chapter, disabling chapter markers
[13:01:36] job configuration:
[13:01:36]  * source
[13:01:36]    + F:\Downloads\source_500mbit_x264.m4v
[13:01:36]    + title 1, chapter(s) 1 to 1
[13:01:36]    + container: mov,mp4,m4a,3gp,3g2,mj2
[13:01:36]    + data rate: 479967 kbps
[13:01:36]  * destination
[13:01:36]    + F:\Videos\Source 500Mbit X264-vce265-4k.m4v
[13:01:36]    + container: MPEG-4 (libavformat)
[13:01:36]  * video track
[13:01:36]    + decoder: h264 8-bit
[13:01:36]      + bitrate 479977 kbps
[13:01:36]    + filter
[13:01:36]      + Framerate Shaper (mode=1)
[13:01:36]        + frame rate: 60.000 fps -> constant 60.000 fps
[13:01:36]    + Output geometry
[13:01:36]      + storage dimensions: 2560 x 1440
[13:01:36]      + pixel aspect ratio: 1 : 1
[13:01:36]      + display dimensions: 2560 x 1440
[13:01:36]    + encoder: H.265 (AMD VCE)
[13:01:36]      + preset:  quality
[13:01:36]      + profile: main
[13:01:36]      + level:   auto
[13:01:36]      + bitrate: 4000 kbps, pass: 0
[13:01:36]      + color profile: 1-1-1
[13:01:36] sync: expecting 1046 video frames
[13:01:36] encavcodecInit: H.265 (AMD VCE)
[13:01:36] encavcodec: encoding at rc=vbr_peak Bitrate 4000
[13:01:36] encavcodec: encoding with stored aspect 1/1
[13:01:36] sync: first pts video is 0
[13:01:36] sync: "Chapter 1" (1) at frame 1 time 0
[13:01:46] reader: done. 1 scr changes
[13:01:46] work: average encoding speed for job is 104.184929 fps
[13:01:46] vfr: 1046 frames output, 0 dropped and 0 duped for CFR/PFR
[13:01:46] vfr: lost time: 0 (0 frames)
[13:01:46] vfr: gained time: 0 (0 frames) (0 not accounted for)
[13:01:46] h264-decoder done: 1046 frames, 0 decoder errors
[13:01:46] sync: got 1046 frames, 1046 expected
[13:01:46] sync: framerate min 60.000 fps, max 60.000 fps, avg 60.000 fps
[13:01:46] mux: track 0, 1046 frames, 80757896 bytes, 37023.68 kbps, fifo 256
[13:01:46] Finished work at: Wed Mar 03 13:01:46 2021
[13:01:46] libhb: work result = 0

# Encode Completed ...

@sr55
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sr55 commented Mar 3, 2021

Does it happen to work if only the RX480 is in the machine?

Could be HB or ffmpeg related. Sadly I don't have a card to hand to do any testing.

@PMunkes
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PMunkes commented Mar 4, 2021

No change with the RX 480. Though there has been something of a development in the AMF ticket. It seems that the issue stems from ffmpeg and some poorly chosen default values.
Quote from #256 from the AMF repository:

In hevc_amf implementation QP values defaulted to 0-51.
The problem is that ffmpeg sets qmin = 2 and qmax=31 as defaults in options_table.h and hevc_amf picks them up if hevc_amf QPs are not set.

Common properties like qmin and qmax could be re-defaulted in hevc_amf but it is not good practice. Or handbrake should set them explicitly.

HandBrake Nightly 20210303115253-4dc9fadd7-patch-1 (2021030301)
OS: Microsoft Windows NT 10.0.19042.0
CPU: AMD Ryzen 7 5800X 8-Core Processor             
Ram: 32711 MB, 
GPU Information:
  Radeon (TM) RX 480 Graphics - 27.20.14535.1000
Screen: 2560x1440
Temp Dir: C:\Users\Philipp\AppData\Local\Temp\
Install Dir: C:\Program Files\HandBrake
Data Dir: C:\Users\Philipp\AppData\Roaming\HandBrake\Nightly

-------------------------------------------


# Starting Encode ...

[01:05:21] base preset: Production Max (Modified)
[01:05:21] hb_init: starting libhb thread
[01:05:21] Starting work at: Thu Mar 04 01:05:21 2021
[01:05:21] 1 job(s) to process
[01:05:21] json job:
{
  "Audio": {
    "AudioList": [],
    "CopyMask": [
      "copy:aac",
      "copy:ac3",
      "copy:dtshd",
      "copy:dts",
      "copy:eac3",
      "copy:flac",
      "copy:mp3",
      "copy:truehd"
    ],
    "FallbackEncoder": "ac3"
  },
  "Destination": {
    "ChapterList": [
      {
        "Name": "Chapter 1"
      }
    ],
    "ChapterMarkers": true,
    "AlignAVStart": false,
    "File": "F:\\Videos\\Source 500Mbit X264-1.m4v",
    "Mp4Options": {
      "IpodAtom": false,
      "Mp4Optimize": false
    },
    "Mux": "av_mp4"
  },
  "Filters": {
    "FilterList": [
      {
        "ID": 12,
        "Settings": {
          "crop-bottom": "0",
          "crop-left": "0",
          "crop-right": "0",
          "crop-top": "0",
          "height": "1440",
          "width": "2560"
        }
      },
      {
        "ID": 6,
        "Settings": {
          "mode": "1"
        }
      }
    ]
  },
  "PAR": {
    "Num": 1,
    "Den": 1
  },
  "Metadata": {},
  "SequenceID": 0,
  "Source": {
    "Angle": 1,
    "Range": {
      "Type": "chapter",
      "Start": 1,
      "End": 1
    },
    "Title": 1,
    "Path": "F:\\Downloads\\source_500mbit_x264.m4v"
  },
  "Subtitle": {
    "Search": {
      "Burn": false,
      "Default": false,
      "Enable": false,
      "Forced": false
    },
    "SubtitleList": []
  },
  "Video": {
    "Encoder": "vce_h265",
    "Level": "auto",
    "Bitrate": 5000,
    "TwoPass": false,
    "Turbo": false,
    "ColorMatrixCode": 0,
    "Options": "",
    "Preset": "quality",
    "Profile": "main",
    "QSV": {
      "Decode": false,
      "AsyncDepth": 0
    }
  }
}
[01:05:21] CPU: AMD Ryzen 7 5800X 8-Core Processor
[01:05:21]  - logical processor count: 16
[01:05:21] Intel Quick Sync Video support: no
[01:05:21] hb_scan: path=F:\Downloads\source_500mbit_x264.m4v, title_index=1
udfread ERROR: ECMA 167 Volume Recognition failed
src/libbluray/disc/disc.c:323: failed opening UDF image F:\Downloads\source_500mbit_x264.m4v
src/libbluray/disc/disc.c:424: error opening file BDMV\index.bdmv
src/libbluray/disc/disc.c:424: error opening file BDMV\BACKUP\index.bdmv
src/libbluray/bluray.c:2585: nav_get_title_list(F:\Downloads\source_500mbit_x264.m4v\) failed
[01:05:21] bd: not a bd - trying as a stream/file instead
libdvdnav: Using dvdnav version 6.0.1
libdvdread: Encrypted DVD support unavailable.
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdread:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[01:05:21] dvd: not a dvd - trying as a stream/file instead
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Downloads\source_500mbit_x264.m4v':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 2021-03-01T21:53:16.000000Z
    encoder         : HandBrake 1.3.3 2020061300
  Duration: 00:00:17.43, start: 0.000000, bitrate: 479967 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 2560x1440 [SAR 1:1 DAR 16:9], 479977 kb/s, 60 fps, 60 tbr, 90k tbn, 120 tbc (default)
    Metadata:
      creation_time   : 2021-03-01T21:53:16.000000Z
      handler_name    : VideoHandler
[01:05:22] scan: decoding previews for title 1
[01:05:24] scan: 10 previews, 2560x1440, 60.000 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 1:1, color profile: 1-1-1
[01:05:24] scan: supported video decoders: avcodec qsv
[01:05:24] libhb: scan thread found 1 valid title(s)
[01:05:24] Starting Task: Encoding Pass
[01:05:24] Skipping crop/scale filter
[01:05:24] work: only 1 chapter, disabling chapter markers
[01:05:24] job configuration:
[01:05:24]  * source
[01:05:24]    + F:\Downloads\source_500mbit_x264.m4v
[01:05:24]    + title 1, chapter(s) 1 to 1
[01:05:24]    + container: mov,mp4,m4a,3gp,3g2,mj2
[01:05:24]    + data rate: 479967 kbps
[01:05:24]  * destination
[01:05:24]    + F:\Videos\Source 500Mbit X264-1.m4v
[01:05:24]    + container: MPEG-4 (libavformat)
[01:05:24]  * video track
[01:05:24]    + decoder: h264 8-bit
[01:05:24]      + bitrate 479977 kbps
[01:05:24]    + filter
[01:05:24]      + Framerate Shaper (mode=1)
[01:05:24]        + frame rate: 60.000 fps -> constant 60.000 fps
[01:05:24]    + Output geometry
[01:05:24]      + storage dimensions: 2560 x 1440
[01:05:24]      + pixel aspect ratio: 1 : 1
[01:05:24]      + display dimensions: 2560 x 1440
[01:05:24]    + encoder: H.265 (AMD VCE)
[01:05:24]      + preset:  quality
[01:05:24]      + profile: main
[01:05:24]      + level:   auto
[01:05:24]      + bitrate: 5000 kbps, pass: 0
[01:05:24]      + color profile: 1-1-1
[01:05:25] sync: expecting 1046 video frames
[01:05:25] encavcodecInit: H.265 (AMD VCE)
[01:05:25] encavcodec: encoding at rc=vbr_peak Bitrate 5000
[01:05:25] encavcodec: encoding with stored aspect 1/1
[01:05:25] sync: first pts video is 0
[01:05:25] sync: "Chapter 1" (1) at frame 1 time 0
[01:05:43] reader: done. 1 scr changes
[01:05:45] work: average encoding speed for job is 53.962543 fps
[01:05:45] vfr: 1046 frames output, 0 dropped and 0 duped for CFR/PFR
[01:05:45] vfr: lost time: 0 (0 frames)
[01:05:45] vfr: gained time: 0 (0 frames) (0 not accounted for)
[01:05:45] h264-decoder done: 1046 frames, 0 decoder errors
[01:05:45] sync: got 1046 frames, 1046 expected
[01:05:45] sync: framerate min 60.000 fps, max 60.000 fps, avg 60.000 fps
[01:05:45] mux: track 0, 1046 frames, 96951274 bytes, 44447.58 kbps, fifo 256
[01:05:45] Finished work at: Thu Mar 04 01:05:45 2021
[01:05:45] libhb: work result = 0

# Encode Completed ...

PMunkes added a commit to PMunkes/HandBrake that referenced this issue Mar 4, 2021
@PMunkes
Correct QP range when using ffmpeg VCE H265
a6d3fce 
By default ffmpeg restricts qp factors to a range of 2 to 31, unless otherwise overwritten. This significantly constrains the low bitrate performance of VCE in H.264 mode.
This should fix issue HandBrake#3447 and could also address parts of issue HandBrake#2980.
@PMunkes PMunkes mentioned this issue Mar 4, 2021
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PMunkes commented Mar 4, 2021

Since the fix is fairly trivial, would it be desirable to backport this for a potential 1.3.4 release?

@bradleysepos
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Since the fix is fairly trivial, would it be desirable to backport this for a potential 1.3.4 release?

I can merge it to the 1.3.x branch (there are a few other minor fixes there). Realistically, we will likely not be doing 1.3.4 proper as 1.4.0 is in sight.

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PMunkes commented Mar 4, 2021

Fair enough.

TimothyGu pushed a commit to FFmpeg/FFmpeg that referenced this issue Mar 9, 2021
@OvchinnikovDmitrii @jamrial
libavcodec/amfenc_hevc: Recommend values for min and max video quanti…
1a549ef 
…zer scale.

Current settings makes bitrate larger than expected, more information:
HandBrake/HandBrake#3447 (comment)

Signed-off-by: James Almer <jamrial@gmail.com>
sr55 pushed a commit that referenced this issue Mar 9, 2021
@PMunkes @sr55
Correct QP range when using ffmpeg VCE H265
7ae1c6a 
By default ffmpeg restricts qp factors to a range of 2 to 31, unless otherwise overwritten. This significantly constrains the low bitrate performance of VCE in H.264 mode.
This should fix issue #3447 and could also address parts of issue #2980.
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sr55 commented Mar 9, 2021

PR Merged :)

@sr55 sr55 closed this as completed Mar 9, 2021
@sr55 sr55 added the Bug label Mar 9, 2021
@sr55 sr55 added this to the 1.4.0 milestone Mar 9, 2021
@PMunkes
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PMunkes commented Mar 10, 2021

Thanks

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