FastFlix Version:
6.2.1
Operating System:
Windows 11 25h2
Describe the bug
.mpeg (h264) and .mov (hevc, prores hq, etc...) fail to start encoding
To Reproduce
use any video with file extension using .mov or .mpeg and it always fail to start encoding
Logs (If applicable) In FastFlix you can go to Help > Open Log Directory and sort by latest to find the newest log file to add here.
2026-04-10 11:37:58,855 - Using work dir: C:\Users\ProtoX1-W10\AppData\Roaming\FastFlix\temp_20260410_3888cce162b3c926
2026-04-10 11:37:58,855 - command output file set to: C:\Users\ProtoX1-W10\AppData\Roaming\FastFlix\temp_20260410_3888cce162b3c926\encoder_output_4c0599ecb5f0.log
2026-04-10 11:37:58,856 - command error output file set to: C:\Users\ProtoX1-W10\AppData\Roaming\FastFlix\temp_20260410_3888cce162b3c926\encoder_error_output_b81ac7ac2a23.log
2026-04-10 11:37:58,856 - Running command: ['C:\Users\ProtoX1-W10\AppData\Roaming\FFmpeg\bin\ffmpeg.exe', '-y', '-i', 'F:\Untitled457456456.mov', '-max_muxing_queue_size', '1024', '-map', '0:0', '-c:v', 'libsvtav1', '-pix_fmt', 'yuv420p10le', '-preset', '7', '-color_primaries', 'bt709', '-color_trc', 'bt709', '-colorspace', 'bt709', '-svtav1-params', 'tile-columns=0:tile-rows=0:scd=0', '-crf', '24', '-map_metadata', '-1', '-map_chapters', '0', '-map', '0:1', '-metadata:s:1', 'title=', '-metadata:s:1', 'handler=', '-c:1', 'copy', '-disposition:1', 'default', '-default_mode', 'infer_no_subs', '-map', '0:2', '-c:d', 'copy', 'F:\Untitled457456456-fastflix-9e79.mkv']
2026-04-10 11:37:58,860 - Set command priority to Normal
2026-04-10 11:37:58,892 - ffmpeg version 8.1-full_build-www.gyan.dev Copyright (c) 2000-2026 the FFmpeg developers
2026-04-10 11:37:58,903 - built with gcc 15.2.0 (Rev11, Built by MSYS2 project)
2026-04-10 11:37:58,914 - configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-cairo --enable-fontconfig --enable-iconv --enable-gnutls --enable-lcms2 --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-libdvdnav --enable-libdvdread --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libopenjpeg --enable-libquirc --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-liboapv --enable-libqrencode --enable-librav1e --enable-libsvtav1 --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libsvtjpegxs --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-openal --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-liblc3 --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint --enable-whisper
2026-04-10 11:37:58,925 - libavutil 60. 26.100 / 60. 26.100
2026-04-10 11:37:58,936 - libavcodec 62. 28.100 / 62. 28.100
2026-04-10 11:37:58,946 - libavformat 62. 12.100 / 62. 12.100
2026-04-10 11:37:58,957 - libavdevice 62. 3.100 / 62. 3.100
2026-04-10 11:37:58,968 - libavfilter 11. 14.100 / 11. 14.100
2026-04-10 11:37:58,979 - libswscale 9. 5.100 / 9. 5.100
2026-04-10 11:37:58,990 - libswresample 6. 3.100 / 6. 3.100
2026-04-10 11:37:59,001 - Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Untitled457456456.mov':
2026-04-10 11:37:59,012 - Metadata:
2026-04-10 11:37:59,023 - major_brand : qt
2026-04-10 11:37:59,034 - minor_version : 512
2026-04-10 11:37:59,045 - compatible_brands: qt
2026-04-10 11:37:59,056 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,067 - encoder : Blackmagic Design DaVinci Resolve Studio
2026-04-10 11:37:59,078 - Duration: 00:00:12.46, start: 0.000000, bitrate: 3921 kb/s
2026-04-10 11:37:59,088 - Stream #0:0[0x1]: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 3787 kb/s, 24 fps, 24 tbr, 12288 tbn (default)
2026-04-10 11:37:59,099 - Metadata:
2026-04-10 11:37:59,110 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,121 - handler_name : VideoHandler
2026-04-10 11:37:59,132 - vendor_id :
2026-04-10 11:37:59,142 - encoder : H.265 8-bit - NVIDIA
2026-04-10 11:37:59,153 - timecode : 01:00:00:00
2026-04-10 11:37:59,164 - Stream #0:1[0x2]: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
2026-04-10 11:37:59,175 - Metadata:
2026-04-10 11:37:59,186 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,196 - handler_name : SoundHandler
2026-04-10 11:37:59,207 - vendor_id : [0][0][0][0]
2026-04-10 11:37:59,218 - Stream #0:20x3: Data: none (tmcd / 0x64636D74), 0 kb/s (default)
2026-04-10 11:37:59,229 - Metadata:
2026-04-10 11:37:59,240 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,251 - handler_name : TimeCodeHandler
2026-04-10 11:37:59,262 - timecode : 01:00:00:00
2026-04-10 11:37:59,273 - Stream mapping:
2026-04-10 11:37:59,284 -
2026-04-10 11:37:59,285 - Stream #0:0 -> #0:0 (hevc (native) -> av1 (libsvtav1))
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v4.0.1-131-g003643d4
Svt[info]: SVT [build] : GCC 15.2.0 64 bit
Svt[info]: LIB Build date: Mar 15 2026 10:44:46
Svt[info]: -------------------------------------------
Svt[info]: Level of Parallelism: 6
Svt[info]: Number of PPCS 305
Svt[info]: [asm level on system : up to avx512icl]
Svt[info]: [asm level selected : up to avx512icl]
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: main profile tier (auto) level (auto)
Svt[info]: SVT [config]: width / height / fps numerator / fps denominator : 1920 / 1080 / 24 / 1
Svt[info]: SVT [config]: bit-depth / color format : 10 / YUV420
Svt[info]: SVT [config]: preset / tune / pred struct : 7 / PSNR / random access
Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type : 161 / 32 / key frame
Svt[info]: SVT [config]: BRC mode / rate factor : CRF / 24.00
Svt[info]: SVT [config]: AQ mode / Variance Boost : 2 / 0
Svt[info]: SVT [config]: sharpness / luminance-based QP bias : 0 / 0
Svt[info]: SVT [config]: QP scale compress strength : 0
Svt[info]: -------------------------------------------
[matroska @ 00000227d2b84940] Only audio, video, and subtitles are supported for Matroska.
[out#0/matroska @ 00000227d2bde640] Could not write header (incorrect codec parameters ?): Invalid argument
[vf#0:0 @ 00000227d2b7c4c0] Error sending frames to consumers: Invalid argument
[vf#0:0 @ 00000227d2b7c4c0] Task finished with error code: -22 (Invalid argument)
[vf#0:0 @ 00000227d2b7c4c0] Terminating thread with return code -22 (Invalid argument)
[out#0/matroska @ 00000227d2bde640] Nothing was written into output file, because at least one of its streams received no packets.
frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:00.24
Conversion failed!
FastFlix Version:
6.2.1
Operating System:
Windows 11 25h2
Describe the bug
.mpeg (h264) and .mov (hevc, prores hq, etc...) fail to start encoding
To Reproduce
use any video with file extension using .mov or .mpeg and it always fail to start encoding
Logs (If applicable) In FastFlix you can go to Help > Open Log Directory and sort by latest to find the newest log file to add here.
2026-04-10 11:37:58,855 - Using work dir: C:\Users\ProtoX1-W10\AppData\Roaming\FastFlix\temp_20260410_3888cce162b3c926
2026-04-10 11:37:58,855 - command output file set to: C:\Users\ProtoX1-W10\AppData\Roaming\FastFlix\temp_20260410_3888cce162b3c926\encoder_output_4c0599ecb5f0.log
2026-04-10 11:37:58,856 - command error output file set to: C:\Users\ProtoX1-W10\AppData\Roaming\FastFlix\temp_20260410_3888cce162b3c926\encoder_error_output_b81ac7ac2a23.log
2026-04-10 11:37:58,856 - Running command: ['C:\Users\ProtoX1-W10\AppData\Roaming\FFmpeg\bin\ffmpeg.exe', '-y', '-i', 'F:\Untitled457456456.mov', '-max_muxing_queue_size', '1024', '-map', '0:0', '-c:v', 'libsvtav1', '-pix_fmt', 'yuv420p10le', '-preset', '7', '-color_primaries', 'bt709', '-color_trc', 'bt709', '-colorspace', 'bt709', '-svtav1-params', 'tile-columns=0:tile-rows=0:scd=0', '-crf', '24', '-map_metadata', '-1', '-map_chapters', '0', '-map', '0:1', '-metadata:s:1', 'title=', '-metadata:s:1', 'handler=', '-c:1', 'copy', '-disposition:1', 'default', '-default_mode', 'infer_no_subs', '-map', '0:2', '-c:d', 'copy', 'F:\Untitled457456456-fastflix-9e79.mkv']
2026-04-10 11:37:58,860 - Set command priority to Normal
2026-04-10 11:37:58,892 - ffmpeg version 8.1-full_build-www.gyan.dev Copyright (c) 2000-2026 the FFmpeg developers
2026-04-10 11:37:58,903 - built with gcc 15.2.0 (Rev11, Built by MSYS2 project)
2026-04-10 11:37:58,914 - configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-cairo --enable-fontconfig --enable-iconv --enable-gnutls --enable-lcms2 --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-libdvdnav --enable-libdvdread --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libopenjpeg --enable-libquirc --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-liboapv --enable-libqrencode --enable-librav1e --enable-libsvtav1 --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libsvtjpegxs --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-openal --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-liblc3 --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint --enable-whisper
2026-04-10 11:37:58,925 - libavutil 60. 26.100 / 60. 26.100
2026-04-10 11:37:58,936 - libavcodec 62. 28.100 / 62. 28.100
2026-04-10 11:37:58,946 - libavformat 62. 12.100 / 62. 12.100
2026-04-10 11:37:58,957 - libavdevice 62. 3.100 / 62. 3.100
2026-04-10 11:37:58,968 - libavfilter 11. 14.100 / 11. 14.100
2026-04-10 11:37:58,979 - libswscale 9. 5.100 / 9. 5.100
2026-04-10 11:37:58,990 - libswresample 6. 3.100 / 6. 3.100
2026-04-10 11:37:59,001 - Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'F:\Untitled457456456.mov':
2026-04-10 11:37:59,012 - Metadata:
2026-04-10 11:37:59,023 - major_brand : qt
2026-04-10 11:37:59,034 - minor_version : 512
2026-04-10 11:37:59,045 - compatible_brands: qt
2026-04-10 11:37:59,056 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,067 - encoder : Blackmagic Design DaVinci Resolve Studio
2026-04-10 11:37:59,078 - Duration: 00:00:12.46, start: 0.000000, bitrate: 3921 kb/s
2026-04-10 11:37:59,088 - Stream #0:0[0x1]: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 3787 kb/s, 24 fps, 24 tbr, 12288 tbn (default)
2026-04-10 11:37:59,099 - Metadata:
2026-04-10 11:37:59,110 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,121 - handler_name : VideoHandler
2026-04-10 11:37:59,132 - vendor_id :
2026-04-10 11:37:59,142 - encoder : H.265 8-bit - NVIDIA
2026-04-10 11:37:59,153 - timecode : 01:00:00:00
2026-04-10 11:37:59,164 - Stream #0:1[0x2]: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
2026-04-10 11:37:59,175 - Metadata:
2026-04-10 11:37:59,186 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,196 - handler_name : SoundHandler
2026-04-10 11:37:59,207 - vendor_id : [0][0][0][0]
2026-04-10 11:37:59,218 - Stream #0:20x3: Data: none (tmcd / 0x64636D74), 0 kb/s (default)
2026-04-10 11:37:59,229 - Metadata:
2026-04-10 11:37:59,240 - creation_time : 2026-04-05T18:47:04.000000Z
2026-04-10 11:37:59,251 - handler_name : TimeCodeHandler
2026-04-10 11:37:59,262 - timecode : 01:00:00:00
2026-04-10 11:37:59,273 - Stream mapping:
2026-04-10 11:37:59,284 -
2026-04-10 11:37:59,285 - Stream #0:0 -> #0:0 (hevc (native) -> av1 (libsvtav1))
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
Svt[info]: -------------------------------------------
Svt[info]: SVT [version]: SVT-AV1 Encoder Lib v4.0.1-131-g003643d4
Svt[info]: SVT [build] : GCC 15.2.0 64 bit
Svt[info]: LIB Build date: Mar 15 2026 10:44:46
Svt[info]: -------------------------------------------
Svt[info]: Level of Parallelism: 6
Svt[info]: Number of PPCS 305
Svt[info]: [asm level on system : up to avx512icl]
Svt[info]: [asm level selected : up to avx512icl]
Svt[info]: -------------------------------------------
Svt[info]: SVT [config]: main profile tier (auto) level (auto)
Svt[info]: SVT [config]: width / height / fps numerator / fps denominator : 1920 / 1080 / 24 / 1
Svt[info]: SVT [config]: bit-depth / color format : 10 / YUV420
Svt[info]: SVT [config]: preset / tune / pred struct : 7 / PSNR / random access
Svt[info]: SVT [config]: gop size / mini-gop size / key-frame type : 161 / 32 / key frame
Svt[info]: SVT [config]: BRC mode / rate factor : CRF / 24.00
Svt[info]: SVT [config]: AQ mode / Variance Boost : 2 / 0
Svt[info]: SVT [config]: sharpness / luminance-based QP bias : 0 / 0
Svt[info]: SVT [config]: QP scale compress strength : 0
Svt[info]: -------------------------------------------
[matroska @ 00000227d2b84940] Only audio, video, and subtitles are supported for Matroska.
[out#0/matroska @ 00000227d2bde640] Could not write header (incorrect codec parameters ?): Invalid argument
[vf#0:0 @ 00000227d2b7c4c0] Error sending frames to consumers: Invalid argument
[vf#0:0 @ 00000227d2b7c4c0] Task finished with error code: -22 (Invalid argument)
[vf#0:0 @ 00000227d2b7c4c0] Terminating thread with return code -22 (Invalid argument)
[out#0/matroska @ 00000227d2bde640] Nothing was written into output file, because at least one of its streams received no packets.
frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A elapsed=0:00:00.24
Conversion failed!