Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Edward Park writes: > Hi, > >>> just remove the redirection and look how to avoid that situation >> >> Nope, I just added -nostdin. > > > But doesn’t that redirection just count as that process having another > file open? I think with ionice -c3 it might make a difference, unless > -nostdin also is silent It is a batch script. I do not want the output to the terminal, but I do want the output in a log-file. By using -nostdin I circumvent the possibility that ffmpeg expects input from stdin. (Whay you do not want from a batch script.) -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Cecil Westerhof (12020-10-21): > I think over 90% CPU just for waiting for input is a 'little' > overkill. ffmpeg busty-waits the commands: the command input is not designed for interactive editing. The fact that it is not echoed was a hint. Just copy-paste your command all at once and you will not notice any load. Regards, -- Nicolas George signature.asc Description: PGP signature ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Hi, >> just remove the redirection and look how to avoid that situation > > Nope, I just added -nostdin. But doesn’t that redirection just count as that process having another file open? I think with ionice -c3 it might make a difference, unless -nostdin also is silent Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Reindl Harald writes: > Am 20.10.20 um 20:38 schrieb Cecil Westerhof: >> Enter command: |all |-1 [ ] >> >> From this moment on ffmpeg does nothing but using CPU cycles > > and you don't realize that it waits for input? I think over 90% CPU just for waiting for input is a 'little' overkill. > just remove the redirection and look how to avoid that situation Nope, I just added -nostdin. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Am 20.10.20 um 20:38 schrieb Cecil Westerhof: Enter command: |all |-1 [ ] From this moment on ffmpeg does nothing but using CPU cycles and you don't realize that it waits for input? just remove the redirection and look how to avoid that situation ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Moritz Barsnick writes:
> On Tue, Oct 20, 2020 at 19:33:05 +0200, Cecil Westerhof wrote:
>> When looking into the log-file I see it ends with:
>> Enter command: |all |-1 [ ]
>>
>> What could be happening here?
>
> This looks like something from stdin triggered interactive mode.
>
> On Tue, Oct 20, 2020 at 20:38:03 +0200, Cecil Westerhof wrote:
>> The command I use in the bash script is:
>> nice -n 10 ionice -c3 \
>> ffmpeg -y \
>> -i "${inputfile}" \
>> -vf scale=${xDimension}:-2 \
>> -crf28 \
>> -acodec libmp3lame \
>> -qscale:a 9 \
>> -preset veryfast\
>> "${outputfile}" 2>"${logfile}"
>
> If you add the option "-nostdin", this mode cannot be triggered. Do try
> that. (You can then no longer interactively quit ffmpeg, of course.)
I will add that. It is in a batch, so I do not need the interactivity.
;-)
Does it matter where I put it? (I am thinking between -i and -vf.)
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU
On Tue, Oct 20, 2020 at 19:33:05 +0200, Cecil Westerhof wrote:
> When looking into the log-file I see it ends with:
> Enter command: |all |-1 [ ]
>
> What could be happening here?
This looks like something from stdin triggered interactive mode.
On Tue, Oct 20, 2020 at 20:38:03 +0200, Cecil Westerhof wrote:
> The command I use in the bash script is:
> nice -n 10 ionice -c3 \
> ffmpeg -y \
> -i "${inputfile}" \
> -vf scale=${xDimension}:-2 \
> -crf28 \
> -acodec libmp3lame \
> -qscale:a 9 \
> -preset veryfast\
> "${outputfile}" 2>"${logfile}"
If you add the option "-nostdin", this mode cannot be triggered. Do try
that. (You can then no longer interactively quit ffmpeg, of course.)
Cheers,
Moritz
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU
Carl Zwanzig writes:
> On 10/20/2020 10:33 AM, Cecil Westerhof wrote:
>> What could be happening here?
>
> Please post some more info, at the least the complete command and the
> output of the last invocation in by the script.
The command I use in the bash script is:
nice -n 10 ionice -c3 \
ffmpeg -y \
-i "${inputfile}" \
-vf scale=${xDimension}:-2 \
-crf28 \
-acodec libmp3lame \
-qscale:a 9 \
-preset veryfast\
"${outputfile}" 2>"${logfile}"
The value of xDimension was in this case 720.
I am using ffmpeg version 4.1.6 on Debian 10.
The log-file starts with:
ffmpeg version 4.1.6-1~deb10u1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --prefix=/usr --extra-version='1~deb10u1'
--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
--incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
--disable-stripping --enable-avresample --disable-filter=resample
--enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
--enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig
--enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm
--enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
--enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg
--enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr
--enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack
--enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid
--enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal
--enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm
--enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264
--enable-shared
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat58. 20.100 / 58. 20.100
libavdevice58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc55. 3.100 / 55. 3.100
Everything looks fine to me until the following:
frame=28999 fps= 26 q=34.0 size= 33024kB time=00:16:06.40 bitrate=
279.9kbits/s speed=0.855x
frame=29003 fps= 26 q=34.0 size= 33024kB time=00:16:06.40 bitrate=
279.9kbits/s speed=0.854x
frame=29010 fps= 26 q=34.0 size= 33024kB time=00:16:06.40 bitrate=
279.9kbits/s speed=0.853x
frame=29016 fps= 26 q=34.0 size= 33024kB time=00:16:06.87 bitrate=
279.8kbits/s speed=0.853x
frame=29022 fps= 26 q=34.0 size= 33024kB time=00:16:06.87 bitrate=
279.8kbits/s speed=0.853x
Then there is quit a lot like this:
stream #0:
keyframe=0
duration=0.033
dts=968.033 pts=968.067
size=3318
[h264 @ 0x562755f52ac0] nal_unit_type: 1(Coded slice of a non-IDR picture),
nal_ref_idc: 2
[libx264 @ 0x562755f46600] frame=29022 QP=29.87 NAL=0 Slice:B Poc:12 I:0
P:91 SKIP:1079 size=160 bytes
stream #1:
keyframe=1
duration=0.023
dts=967.599 pts=967.599
size=347
stream #1:
keyframe=1
duration=0.023
dts=967.622 pts=967.622
size=359
And it ends with this:
[h264 @ 0x562755f487c0] nal_unit_type: 1(Coded slice of a non-IDR picture),
nal_ref_idc: 2
[libx264 @ 0x562755f46600] frame=29131 QP=34.84 NAL=2 Slice:B Poc:4 I:29
P:345 SKIP:782 size=1179 bytes
stream #0:
keyframe=0
duration=0.033
dts=971.700 pts=971.700
size=197
[h264 @ 0x562755f5c3c0] nal_unit_type: 1(Coded slice of a non-IDR picture),
nal_ref_idc: 0
[libx264 @ 0x562755f46600] frame=29132 QP=35.33 NAL=0 Slice:B Poc:6 I:8
P:264 SKIP:892 size=722 bytes
Enter command: |all |-1 [ ]
From this moment on ffmpeg does nothing but using CPU cycles.
One interesting part: I had earlier the same problem with another
file. After cancelling and starting again, it was processed without a
problem.
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] ffmpeg does nothing but using CPU
On 10/20/2020 10:33 AM, Cecil Westerhof wrote: What could be happening here? Please post some more info, at the least the complete command and the output of the last invocation in by the script. Later, z! ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
