[FFmpeg-user] Trouble transcoding with cuda
Ray Randomnic
randomnicode at gmail.com
Wed Sep 4 07:38:26 EEST 2019
Hey,
Sure, any video taken by a Samsung device (such as Note or Galaxy S9 or
S10) with the HDR10+ setting will do. A sample is posted here:
http://awakeman.redirectme.net/web/testvideo/sample.mp4
Thanks.
On Tue, Sep 3, 2019 at 10:07 PM Dennis Mungai <dmngaie at gmail.com> wrote:
> On Wed, 4 Sep 2019 at 04:32, Ray Randomnic <randomnicode at gmail.com> wrote:
> >
> > Hey folks,
> >
> > I'm trying to transcode an HEVC (yuv420p10le) encoded file to H264 using
> a
> > GTX 1650 nvenc and having issues with what I assume are the pixel formats
> > conversions on hardware. My encode speed (in fps) is pretty low (see
> > below), far lower than I get when transcoding HEVC -> HEVC. ffmpeg
> version
> > is N-94578-gd6bd902599-gcff309097a+3 (on a Windows 10 OS, though I don't
> > think this is relevant). For the purposes of this experiment, let's say
> I'm
> > not concerned with lossiness with format conversions.
> >
> > I'd like to know what I'm doing wrong and what commands I can issue for
> the
> > following:
> > decode on GPU -> format conversion (if necessary) on GPU -> encode on
> GPU.
> > I might not be understanding a few concepts.
> >
> > The combination of options that I thought were available and I tried out
> > are:
> > - decoder (I mostly left this blank for auto) and encoder (always
> > h264_nvenc)
> > - hwaccel
> > - hwaccel_output_format
> > - filters (vf):
> > - format
> > - scale_npp (for format conversion on gpu)
> >
> > I have no idea what the options pix_fmt or other filters like colorspace
> do
> > for hardware (how is pix_fmt different from hwaccel_output_format?). At
> > this point I'm kind of stuck. Don't know how to convert formats on the
> GPU
> > (I assume the format conversion is happening on the CPU).
> >
> > Input details:
> > ffprobe input.mp4
> >
> > Stream #0:0(eng): Video: hevc (Main 10) (hvc1 / 0x31637668),
> > yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 1920x1080, 24886 kb/s, SAR
> 1:1
> > DAR 16:9, 29.99 fps, ...
> >
> > Summary of various combinations (- indicates left blank):
> > test | hwaccel | hwaccel_output_format | filter (vf) |
> > encodefps | note
> > 1 | cuda | - | - | X
> > | Failed
> > 2 | cuda | cuda | - | X
> > | Failed
> > 3 | cuda | yuv420p | - | 361
> > | Video messed up
> > 4 | cuda | cuda | format=yuv420p | X
> > | Failed
> > 5 | cuvid | cuda | format=yuv420p | 91
> > | Not using GPU decode
> > 6 | cuda | - | format=yuv420p | 161
> > | Not using GPU format conversion
> > 7 | cuvid | - | format=yuv420p | 91
> > | Not using GPU decode
> > 8 | cuda | - | scale_npp=format=yuv420p | X
> > | Failed
> > 9 | cuda | cuda | scale_npp=format=yuv420p | X
> > | Failed
> >
> > I would expect a speed of around test 3 (without the screwed up video).
> Is
> > there any way to convert the pixel formats on the hardware without
> screwing
> > up the video? On a similar note, I'd love for someone to explain the
> > failing encodes.
> >
> > Here are the details for corresponding encodes:
> >
> > 1. ffmpeg -loglevel verbose -hwaccel cuda -i input.mp4 -c:v h264_nvenc
> > output.mp4
> >
> > Fails with the following:
> >
> > [graph_1_in_0_1 @ 000001cc9670e4c0] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 000001cc8740fc00] NVDEC capabilities:
> > [hevc @ 000001cc8740fc00] format supported: yes, max_mb_count: 262144
> > [hevc @ 000001cc8740fc00] min_width: 144, max_width: 8192
> > [hevc @ 000001cc8740fc00] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 000001cc87420840] w:1920 h:1080
> > pixfmt:p010le tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [h264_nvenc @ 000001cc8747fbc0] Loaded Nvenc version 9.0
> > [h264_nvenc @ 000001cc8747fbc0] Nvenc initialized successfully
> > [h264_nvenc @ 000001cc8747fbc0] 1 CUDA capable devices found
> > [h264_nvenc @ 000001cc8747fbc0] [ GPU #0 - < GeForce GTX 1650 > has
> > Compute SM 7.5 ]
> > [h264_nvenc @ 000001cc8747fbc0] 10 bit encode not supported
> > [h264_nvenc @ 000001cc8747fbc0] No NVENC capable devices found
> > [h264_nvenc @ 000001cc8747fbc0] Nvenc unloaded
> > 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
> >
> > 2. ffmpeg -loglevel verbose -hwaccel cuda -hwaccel_output_format cuda
> -i
> > input.mp4 -c:v h264_nvenc output.mp4
> >
> > Fails with the following:
> >
> > [graph_1_in_0_1 @ 00000240b7932340] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 00000240b79e37c0] NVDEC capabilities:
> > [hevc @ 00000240b79e37c0] format supported: yes, max_mb_count: 262144
> > [hevc @ 00000240b79e37c0] min_width: 144, max_width: 8192
> > [hevc @ 00000240b79e37c0] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 00000240b7937e00] w:1920 h:1080
> > pixfmt:cuda tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [h264_nvenc @ 00000240b7483700] Loaded Nvenc version 9.0
> > [h264_nvenc @ 00000240b7483700] Nvenc initialized successfully
> > [h264_nvenc @ 00000240b7483700] 10 bit encode not supported
> > [h264_nvenc @ 00000240b7483700] Provided device doesn't support
> required
> > NVENC features
> > [h264_nvenc @ 00000240b7483700] Nvenc unloaded
> > 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
> >
> > Alright, so it seems that the hardware h264 encoder doesn't support 10
> > bit encodes (that's coming from the decoder). So lets try changing the
> > format:
> >
> >
> > 3. ffmpeg -loglevel verbose -hwaccel cuda -hwaccel_output_format
> yuv420p
> > -i input.mp4 -c:v h264_nvenc output.mp4
> >
> > Pretty decent encode at ~ 360 fps. Alas, the video is screwed up.
> Colors
> > are weird:
> >
> > [graph_1_in_0_1 @ 00000256c9ac7b40] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 00000256cbb737c0] NVDEC capabilities:
> > [hevc @ 00000256cbb737c0] format supported: yes, max_mb_count: 262144
> > [hevc @ 00000256cbb737c0] min_width: 144, max_width: 8192
> > [hevc @ 00000256cbb737c0] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 00000256cbac7e00] w:1920 h:1080
> > pixfmt:yuv420p tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [h264_nvenc @ 00000256cb693700] Loaded Nvenc version 9.0
> > [h264_nvenc @ 00000256cb693700] Nvenc initialized successfully
> > [h264_nvenc @ 00000256cb693700] 1 CUDA capable devices found
> > [h264_nvenc @ 00000256cb693700] [ GPU #0 - < GeForce GTX 1650 > has
> > Compute SM 7.5 ]
> > [h264_nvenc @ 00000256cb693700] supports NVENC
> >
> > Let's use a format filter to change format:
> >
> > 4. ffmpeg -loglevel verbose -hwaccel cuda -hwaccel_output_format cuda
> -i
> > input.mp4 -vf format=yuv420p -c:v h264_nvenc output.mp4
> >
> > Fails with the following:
> >
> > [graph_1_in_0_1 @ 0000019390de5c80] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 00000193908675c0] NVDEC capabilities:
> > [hevc @ 00000193908675c0] format supported: yes, max_mb_count: 262144
> > [hevc @ 00000193908675c0] min_width: 144, max_width: 8192
> > [hevc @ 00000193908675c0] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 00000193a031ee80] w:1920 h:1080
> > pixfmt:cuda tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [auto_scaler_0 @ 00000193b7aee780] w:iw h:ih flags:'bicubic' interl:0
> > [Parsed_format_0 @ 00000193908eee80] auto-inserting filter
> > 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0'
> and the
> > filter 'Parsed_format_0'
> > Impossible to convert between the formats supported by the filter
> 'graph
> > 0 input from stream 0:0' and the filter 'auto_scaler_0'
> > Error reinitializing filters!
> > Failed to inject frame into filter network: Function not implemented
> > Error while processing the decoded data for stream #0:0
> >
> > 5. ffmpeg -loglevel verbose -hwaccel cuvid -hwaccel_output_format cuda
> > -i input.mp4 -vf format=yuv420p -c:v h264_nvenc output.mp4
> >
> > Succeeds, but only encodes at around 91 fps, due to, I assume, not
> using
> > GPU decoder. What is the difference between cuvid and cuda hwaccel
> (why did
> > the previous fail and this succeed)? Here is the relevant output:
> >
> > [graph_1_in_0_1 @ 000002152cc3cc00] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 000002152ac33700] Initializing cuvid hwaccel
> > [AVHWFramesContext @ 000002152cc3f0c0] Pixel format 'yuv420p10le' is
> not
> > supported
> > [hevc @ 000002152ac33700] Error initializing a CUDA frame pool
> > cuvid hwaccel requested for input stream #0:0, but cannot be
> initialized.
> > [hevc @ 000002152ac33700] Error parsing NAL unit #2.
> > [hevc @ 000002152ac79180] Could not find ref with POC 0
> > Error while decoding stream #0:0: Operation not permitted
> > [graph 0 input from stream 0:0 @ 000002152d638b80] w:1920 h:1080
> > pixfmt:yuv420p10le tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [auto_scaler_0 @ 000002152ca176c0] w:iw h:ih flags:'bicubic' interl:0
> > [Parsed_format_0 @ 000002152d3fee40] auto-inserting filter
> > 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0'
> and the
> > filter 'Parsed_format_0'
> > [auto_scaler_0 @ 000002152ca176c0] w:1920 h:1080 fmt:yuv420p10le
> sar:1/1
> > -> w:1920 h:1080 fmt:yuv420p sar:1/1 flags:0x4
> > [h264_nvenc @ 000002152ac31800] Loaded Nvenc version 9.0
> > [h264_nvenc @ 000002152ac31800] Nvenc initialized successfully
> > [h264_nvenc @ 000002152ac31800] 1 CUDA capable devices found
> > [h264_nvenc @ 000002152ac31800] [ GPU #0 - < GeForce GTX 1650 > has
> > Compute SM 7.5 ]
> > [h264_nvenc @ 000002152ac31800] supports NVENC
> >
> > Take out hwaccel_output:
> >
> > 6. ffmpeg -loglevel verbose -hwaccel cuda -i in.mp4 -vf format=yuv420p
> > -c:v h264_nvenc out.mp4
> >
> > Succeeds, encodes at 161 fps (using both hardware GPU decoder and
> > encoder, but I believe the changing of format is happening on the CPU
> > between the two stages).
> >
> > [graph_1_in_0_1 @ 0000025491bf2b00] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 0000025491b84900] NVDEC capabilities:
> > [hevc @ 0000025491b84900] format supported: yes, max_mb_count: 262144
> > [hevc @ 0000025491b84900] min_width: 144, max_width: 8192
> > [hevc @ 0000025491b84900] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 0000025491c0eec0] w:1920 h:1080
> > pixfmt:p010le tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [auto_scaler_0 @ 00000254b747cfc0] w:iw h:ih flags:'bicubic' interl:0
> > [Parsed_format_0 @ 000002549203d840] auto-inserting filter
> > 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0'
> and the
> > filter 'Parsed_format_0'
> > [auto_scaler_0 @ 00000254b747cfc0] w:1920 h:1080 fmt:p010le sar:1/1 ->
> > w:1920 h:1080 fmt:yuv420p sar:1/1 flags:0x4
> > [h264_nvenc @ 00000254920a0f40] Loaded Nvenc version 9.0
> > [h264_nvenc @ 00000254920a0f40] Nvenc initialized successfully
> > [h264_nvenc @ 00000254920a0f40] 1 CUDA capable devices found
> > [h264_nvenc @ 00000254920a0f40] [ GPU #0 - < GeForce GTX 1650 > has
> > Compute SM 7.5 ]
> > [h264_nvenc @ 00000254920a0f40] supports NVENC
> >
> >
> > 7. ffmpeg -loglevel verbose -hwaccel cuvid -i in.mp4 -vf
> format=yuv420p
> > -c:v h264_nvenc out.mp4
> >
> > Only encoding on GPU, not decoding (91 fps).
> >
> > [graph_1_in_0_1 @ 000002163875b5c0] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 00000216380c3c00] Initializing cuvid hwaccel
> > [AVHWFramesContext @ 00000216387fc300] Pixel format 'yuv420p10le' is
> not
> > supported
> > [hevc @ 00000216380c3c00] Error initializing a CUDA frame pool
> > cuvid hwaccel requested for input stream #0:0, but cannot be
> initialized.
> > [hevc @ 00000216380c3c00] Error parsing NAL unit #2.
> > [hevc @ 000002163813d300] Could not find ref with POC 0
> > Error while decoding stream #0:0: Operation not permitted
> > [graph 0 input from stream 0:0 @ 00000216387594c0] w:1920 h:1080
> > pixfmt:yuv420p10le tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [auto_scaler_0 @ 000002164f8a0c40] w:iw h:ih flags:'bicubic' interl:0
> > [Parsed_format_0 @ 00000216387593c0] auto-inserting filter
> > 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0'
> and the
> > filter 'Parsed_format_0'
> > [auto_scaler_0 @ 000002164f8a0c40] w:1920 h:1080 fmt:yuv420p10le
> sar:1/1
> > -> w:1920 h:1080 fmt:yuv420p sar:1/1 flags:0x4
> > [h264_nvenc @ 0000021638590f40] Loaded Nvenc version 9.0
> > [h264_nvenc @ 0000021638590f40] Nvenc initialized successfully
> > [h264_nvenc @ 0000021638590f40] 1 CUDA capable devices found
> > [h264_nvenc @ 0000021638590f40] [ GPU #0 - < GeForce GTX 1650 > has
> > Compute SM 7.5 ]
> > [h264_nvenc @ 0000021638590f40] supports NVENC
> >
> > Lets see if I can do format conversion in the GPU (instead of GPU ->
> CPU
> > -> GPU), by using the scale_npp filter.
> >
> > 8. ffmpeg -loglevel verbose -hwaccel cuda -i input.mp4 -vf
> > scale_npp=format=yuv420p -c:v h264_nvenc output.mp4
> >
> > Fails
> >
> > [graph_1_in_0_1 @ 0000022f3001e080] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 0000022f207d7f40] NVDEC capabilities:
> > [hevc @ 0000022f207d7f40] format supported: yes, max_mb_count: 262144
> > [hevc @ 0000022f207d7f40] min_width: 144, max_width: 8192
> > [hevc @ 0000022f207d7f40] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 0000022f3034ee80] w:1920 h:1080
> > pixfmt:p010le tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [auto_scaler_0 @ 0000022f47b2d300] w:iw h:ih flags:'bicubic' interl:0
> > [Parsed_scale_npp_0 @ 0000022f20c49b40] auto-inserting filter
> > 'auto_scaler_0' between the filter 'graph 0 input from stream 0:0'
> and the
> > filter 'Parsed_scale_npp_0'
> > Impossible to convert between the formats supported by the filter
> 'graph
> > 0 input from stream 0:0' and the filter 'auto_scaler_0'
> > Error reinitializing filters!
> > Failed to inject frame into filter network: Function not implemented
> > Error while processing the decoded data for stream #0:0
> >
> >
> > 9. ffmpeg -loglevel verbose -hwaccel cuda -hwaccel_output_format cuda
> -i
> > in.mp4 -vf scale_npp=format=yuv420p -c:v h264_nvenc out.mp4
> >
> > Fails:
> >
> > [graph_1_in_0_1 @ 00000200040adac0] tb:1/48000 samplefmt:fltp
> > samplerate:48000 chlayout:0x3
> > [hevc @ 00000200747b65c0] NVDEC capabilities:
> > [hevc @ 00000200747b65c0] format supported: yes, max_mb_count: 262144
> > [hevc @ 00000200747b65c0] min_width: 144, max_width: 8192
> > [hevc @ 00000200747b65c0] min_height: 144, max_height: 8192
> > [graph 0 input from stream 0:0 @ 00000200040aa8c0] w:1920 h:1080
> > pixfmt:cuda tb:1/90000 fr:30/1 sar:1/1 sws_param:flags=2
> > [Parsed_scale_npp_0 @ 0000020074c75b80] Unsupported input format:
> p010le
> > [Parsed_scale_npp_0 @ 0000020074c75b80] Failed to configure output pad
> > on Parsed_scale_npp_0
> > Error reinitializing filters!
> > Failed to inject frame into filter network: Function not implemented
> > Error while processing the decoded data for stream #0:0
> >
> >
> > I'd appreciate any help or pointer in the right direction (even an
> > alternate mailing list).
>
>
> Hey there,
>
> Could you kindly provide a download link to the sample of the input
> file you're working on?
> That way we can reproduce what you're seeing here, thanks!
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