[FFmpeg-user] ffmpeg 4.0 fails to transcoding one 4k clip

[Yang Zhang]

It will cause you get the "partial HW acceleration" error message
always. there is a patch fix the problem I remember, but I couldn't
find the patch in the latest FFmpeg

On 7/27/18, qw <applemax82 at 163.com> wrote:
> Hi,
>
>
> I use the following command, which reports error:
>
>
> ffmpeg -nostdin -y -hwaccel qsv -c:v h264_qsv -i src_AVC_4K.mp4 -b:a 80000
> -ar 44100 -c:v h264_qsv -g 300 -profile:v high -preset veryfast -c:a
> libfdk_aac -max_muxing_queue_size 4000 -b:v 17418000 -movflags +faststart
> -strict -3 -vsync passthrough -f mp4 dst_AVC_4K.mp4
>
>
> ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
>   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-16)
>   configuration: --enable-version3 --enable-asm --enable-x86asm
> --enable-avfilter --disable-static --enable-shared --enable-gpl
> --enable-nonfree --prefix=/usr/local/ --enable-libvidstab --enable-libass
> --enable-libfreetype --extra-libs=-lfreetype --enable-libtesseract
> --enable-libfdk_aac --enable-libmp3lame --enable-libx264
> --enable-libopenjpeg --enable-libwebp --enable-libx265 --enable-libvorbis
> --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib
> --enable-stripping --enable-libmfx
>   libavutil      56. 14.100 / 56. 14.100
>   libavcodec     58. 18.100 / 58. 18.100
>   libavformat    58. 12.100 / 58. 12.100
>   libavdevice    58.  3.100 / 58.  3.100
>   libavfilter     7. 16.100 /  7. 16.100
>   libswscale      5.  1.100 /  5.  1.100
>   libswresample   3.  1.100 /  3.  1.100
>   libpostproc    55.  1.100 / 55.  1.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src_AVC_4K.mp4':
>   Metadata:
>     major_brand     : isom
>     minor_version   : 512
>     compatible_brands: isomiso2avc1mp41
>     encoder         : Lavf58.12.100
>   Duration: 00:00:03.05, start: 0.000000, bitrate: 42590 kb/s
>     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
> 3840x2160 [SAR 1:1 DAR 16:9], 43119 kb/s, 29.97 fps, 29.97 tbr, 30k tbn,
> 59.94 tbc (default)
>     Metadata:
>       handler_name    : VideoHandler
>     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo,
> fltp, 82 kb/s (default)
>     Metadata:
>       handler_name    : SoundHandler
> Stream mapping:
>   Stream #0:0 -> #0:0 (h264 (h264_qsv) -> h264 (h264_qsv))
>   Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
> [h264_qsv @ 0x22b8480] Encoder will work with partial HW accelerationte=
> -0.0kbits/s speed=N/A
> [h264_qsv @ 0x22b8480] Error initializing the encoder: invalid video
> parameters (-15)
> Error initializing output stream 0:0 -- Error while opening encoder for
> output stream #0:0 - maybe incorrect parameters such as bit_rate, rate,
> width or height
> [libfdk_aac @ 0x23b12c0] 2 frames left in the queue on closing
> Conversion failed!
>
>
> src_AVC_4K.mp4 can be downloaded via the link url:
> https://drive.google.com/file/d/15X7RYIEEvInN8y1gqrZax3-ZGjpcJQ_C/view?usp=sharing
>
>
> Is it a ffmpeg bug?
>
>
> Thanks!
>
>
> Regards
>
>
> Andrew
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