MV-HEVC ecoding on Windows arm64

[mirogl]

Hi,
many thanks first for you precompiled Windows ARM64 ffmpeg packages.
For me everything works, except MV-HEVC and i see in your Release notes only MV-HEVC decoding

On my system i can encode videos wirh handbrake

HandBrake 1.9.2 (2025022300)
OS: Microsoft Windows NT 10.0.26100.0
CPU: Microsoft SQ3

and

H.265 (MediaFoundation)

This works fine.

But when i try to encode the same video with your latest ffmpeg version, which supports hevc MediaFoundation

V....D hevc_mf HEVC via MediaFoundation (codec hevc)

the encoding fails - with h264_mf it works.

i use the n7.1-241205 GPL version
ffmpeg -version ffmpeg version b08d796 Copyright (c) 2000-2024 the FFmpeg developers built with Microsoft (R) C/C++ Optimizing Compiler Version 19.42.34435 for ARM64 configuration: --toolchain=msvc --arch=arm64 --enable-static --pkg-config-flags=--static --enable-cross-compile --disable-asm --enable-gpl --enable-version3 --enable-zlib --enable-libfreetype --enable-libharfbuzz --enable-libass --enable-sdl --enable-libjxl --enable-libvpx --enable-libwebp --enable-libx265 --enable-libx264 libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.100 / 61. 19.100 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100

here the output of the working h264_mf encoding

ffmpeg -i file_example_MP4_1920_18MG.mp4 -c:v h264_mf -b:v 2M -c:a aac -b:a 128k output_hevc.mp4 ffmpeg version b08d796 Copyright (c) 2000-2024 the FFmpeg developers built with Microsoft (R) C/C++ Optimizing Compiler Version 19.42.34435 for ARM64 configuration: --toolchain=msvc --arch=arm64 --enable-static --pkg-config-flags=--static --enable-cross-compile --disable-asm --enable-gpl --enable-version3 --enable-zlib --enable-libfreetype --enable-libharfbuzz --enable-libass --enable-sdl --enable-libjxl --enable-libvpx --enable-libwebp --enable-libx265 --enable-libx264 libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.100 / 61. 19.100 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100 libpostproc 58. 3.100 / 58. 3.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file_example_MP4_1920_18MG.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41isomavc1 creation_time : 2015-08-07T09:13:36.000000Z Duration: 00:00:30.53, start: 0.000000, bitrate: 4675 kb/s Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 4486 kb/s, 30 fps, 30 tbr, 30 tbn (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Video Handler vendor_id : [0][0][0][0] encoder : AVC Coding Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Audio Handler vendor_id : [0][0][0][0] Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_mf)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help [h264_mf @ 000001A9F77BC9D0] MFT name: 'H264 Encoder MFT' Output #0, mp4, to 'output_hevc.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41isomavc1 encoder : Lavf61.7.100 Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 2000 kb/s, 30 fps, 15360 tbn (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Video Handler vendor_id : [0][0][0][0] encoder : Lavc61.19.100 h264_mf Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Audio Handler vendor_id : [0][0][0][0] encoder : Lavc61.19.100 aac [out#0/mp4 @ 000001A9F7139E90] video:7129KiB audio:8KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.377141% frame= 901 fps=188 q=-0.0 Lsize= 7164KiB time=00:00:30.00 bitrate=1956.3kbits/s speed=6.27x [aac @ 000001A9F76F79B0] Qavg: 65536.000

here the output of the non working hevc_mf encoding

ffmpeg -i file_example_MP4_1920_18MG.mp4 -c:v hevc_mf -b:v 2M -c:a aac -b:a 128k output_hevc.mp4 ffmpeg version b08d796 Copyright (c) 2000-2024 the FFmpeg developers built with Microsoft (R) C/C++ Optimizing Compiler Version 19.42.34435 for ARM64 configuration: --toolchain=msvc --arch=arm64 --enable-static --pkg-config-flags=--static --enable-cross-compile --disable-asm --enable-gpl --enable-version3 --enable-zlib --enable-libfreetype --enable-libharfbuzz --enable-libass --enable-sdl --enable-libjxl --enable-libvpx --enable-libwebp --enable-libx265 --enable-libx264 libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.100 / 61. 19.100 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100 libpostproc 58. 3.100 / 58. 3.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file_example_MP4_1920_18MG.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41isomavc1 creation_time : 2015-08-07T09:13:36.000000Z Duration: 00:00:30.53, start: 0.000000, bitrate: 4675 kb/s Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 4486 kb/s, 30 fps, 30 tbr, 30 tbn (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Video Handler vendor_id : [0][0][0][0] encoder : AVC Coding Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Audio Handler vendor_id : [0][0][0][0] Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_mf)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help [hevc_mf @ 0000016E8113A7E0] MFT name: 'HEVCVideoExtensionEncoder' [hevc_mf @ 0000016E8113A7E0] failed processing input: 80004005 [vost#0:0/hevc_mf @ 0000016E817BCD70] Error submitting video frame to the encoder [vost#0:0/hevc_mf @ 0000016E817BCD70] Error encoding a frame: Generic error in an external library [vost#0:0/hevc_mf @ 0000016E817BCD70] Task finished with error code: -542398533 (Generic error in an external library) [vost#0:0/hevc_mf @ 0000016E817BCD70] Terminating thread with return code -542398533 (Generic error in an external library) Output #0, mp4, to 'output_hevc.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41isomavc1 encoder : Lavf61.7.100 Stream #0:0(und): Video: hevc (hev1 / 0x31766568), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 2000 kb/s, 30 fps, 15360 tbn (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Video Handler vendor_id : [0][0][0][0] encoder : Lavc61.19.100 hevc_mf Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: creation_time : 2015-08-07T09:13:36.000000Z handler_name : L-SMASH Audio Handler vendor_id : [0][0][0][0] encoder : Lavc61.19.100 aac [out#0/mp4 @ 0000016E816FD9D0] video:0KiB audio:8KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 75.396825% frame= 0 fps=0.0 q=0.0 Lsize= 15KiB time=N/A bitrate=N/A speed=N/A [aac @ 0000016E816F7FB0] Qavg: 65536.000 Conversion failed!

The quetion is - should it work, when it works also with handbrake or is this not possible with ffmpeg ?

Thanks
Miro

[mirogl]

Here the output of the convert test as txt files
ok.txt
fail.txt

[System233]

Hi, I'm not entirely sure what the issue is with the hevc_mf encoder. The _mf suffix stands for Media Foundation, which is a built-in component of Windows.

Have you tried using the libx265 encoder instead? Its name is simply libx265, not hevc_mf.

If libx265 doesn't appear in your list of available encoders, you likely need to download the GPL version of FFmpeg, as it includes libx265.
https://github.com/System233/ffmpeg-msvc-prebuilt/releases/download/n7.1-241205/ffmpeg-n7.1-241205-gpl-arm64-shared.zip

ffmpeg -encoders:

 V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
 V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
 V....D h264_mf              H264 via MediaFoundation (codec h264)
 VF...D hdr                  HDR (Radiance RGBE format) image
 V....D libx265              libx265 H.265 / HEVC (codec hevc)
 V....D hevc_d3d12va         D3D12VA hevc encoder (codec hevc)
 V....D hevc_mf              HEVC via MediaFoundation (codec hevc)

[mirogl]

Hi @System233,
libx265 encoder is the software encoder. I look for an hardware encoder, and this would be hevc_mf.
I just ask, because Handbrake encoding with hevc_mf works. But if this is not a known issue, than thanks for your feedback.
Miro

[System233]

I believe this is an issue with Media Foundation itself. The error code 0x80004005 is a typical Windows-style error, meaning "unspecified error", which makes it difficult to identify the exact cause.
Even after installing the HEVC extension on my AMD64 machine, I still couldn't get hevc_mf to work.

[mirogl]

Hi @System233,
yes - but then it is strange, why handbrake is working with MV-HEVC without any problems.
But thanks for your support. For me it was just important to know, if this is somehow a known issue with the ffmpeg build. It seems not.

Thanks