I get the error "No NVENC capable devices found" when trying a simple encoding like this, even skipping audio to make sure it's not an audio problem:
ffmpeg.exe -i input.mp4 -c:v hevc_nvenc -an out.mp4
I also tried with more details, like setting the pixel format, the preset, the rate-control, the format.
On the documentation page there:
https://trac.ffmpeg.org/wiki/HWAccelIntro
it says that if we get this error we should check for the pixel format. The video has yuv420p here and even specifying the format results in the same error.
i also checked the NVidia supported cards and it says GeForce, but no details about the models:
https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Encoder
I tried h264_nvenc and it works perfectly however, the problem is only with hevc_nvenc
Has anyone encountered this problem?
Complete console output:
[h264 # 0000000002534560] Reinit context to 1280x544, pix_fmt: yuv420p
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isom
creation_time : 2014-05-23T13:04:15.000000Z
Duration: 01:54:03.95, start: 0.000000, bitrate: 3193 kb/s
Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x544 [SAR 1:1 DAR 40:17], 2750 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
Metadata:
creation_time : 2014-05-23T11:25:27.000000Z
Stream #0:1(spa): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 439 kb/s (default)
Metadata:
creation_time : 2014-05-23T12:56:43.000000Z
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_nvenc))
Press [q] to stop, [?] for help
[h264 # 000000000260ea40] Reinit context to 1280x544, pix_fmt: yuv420p
[graph 0 input from stream 0:0 # 0000000003857ec0] w:1280 h:544 pixfmt:yuv420p tb:1/24000 fr:24000/1001 sar:1/1 sws_param:flags=2
[hevc_nvenc # 00000000038574e0] Loaded Nvenc version 8.0
[hevc_nvenc # 00000000038574e0] Nvenc initialized successfully
[hevc_nvenc # 00000000038574e0] 1 CUDA capable devices found
[hevc_nvenc # 00000000038574e0] [ GPU #0 - < GeForce GTX 950M > has Compute SM 5.0 ]
[hevc_nvenc # 00000000038574e0] Codec not supported
[hevc_nvenc # 00000000038574e0] No NVENC capable devices found
[hevc_nvenc # 00000000038574e0] 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
Conversion failed!
950M doesn't support h265 codec indeed.
From nvidia nvenc page or the detailed support matrix, we can learn that h265/hevc is supported only from 2nd generation maxwell GPU.
Also check the maxwell wiki page and list of NVIDIA GPU. You can see that 950M's code name is GM107 which is a 1st generation maxwell architecture, that means no h265 support. Sorry, you have to fall back to h264.
Related
I need to split a large video file into multiple pieces quickly and without files with errors. The basic idea is, I have a 2GB video file which I want to change to multiple formats. I have read some encoders can not make use of more than 1 core when encoding to a different format. So I had the idea to split the large file (which is very quick) into 4/8 pieces depending on how many cores I have available on individual servers. re-encode each piece to a new format and use these to display video in sequence.
so
testfile.mp4
becomes
testfile_piece_1.mp4
testfile_piece_2.mp4
testfile_piece_3.mp4
testfile_piece_4.mp4
these can then be individually be converted.
The solution should not be format specific. However I have found issues with mp4 files.
I have tried the command below, which works really well and fast but creates files with errors.
ffmpeg -i testfile.mp4 -ss 00:00:00 -t 00:20:00 -c copy testfile_piece_1.mp4
When I play the testfile_piece_1.mp4 on VLC it works fine. An issue arises when converting the split file to a different height and width mp4 file. I would get an error similar to "moov atom not found"
I tried adding -movflags faststart with no luck
I then came across this library https://code.google.com/archive/p/moovrelocator/ which fixed the moov issue but I would then get an error with regards to aac "Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height"
The other way of splitting the files is useless but involved re-encoding the file. not too bad for smaller file size but the 2GB file would probably take days to complete.
Is there a way to split the largr file quickly without producing files with errors? I have been working on it for days with no luck.
Console output for comment - FFmpeg splitting large files
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/usr/share/nginx/html/uploads/testfile01.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Duration: 00:05:02.08, start: 302.120000, bitrate: 3254 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709) , 1920x1080 [SAR 1:1 DAR 16:9], 3252 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (de fault)
Metadata:
handler_name : VideoHandler
[libx264 # 0x165ffc0] width not divisible by 2 (853x480)
Output #0, mp4, to '/usr/share/nginx/html/uploads/testfile01_480.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.36.100
Stream #0:0(und): Video: h264, none, q=2-31, 128 kb/s, SAR 2560:2559 DAR 0:0 , 25 fps (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.41.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
console output 2
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/usr/share/nginx/html/uploads/testfile.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
creation_time : 2016-01-24 04:26:37
Duration: 01:15:58.08, start: 0.000000, bitrate: 3163 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 3161 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Metadata:
creation_time : 2016-01-24 04:26:37
handler_name : VideoHandler
[segment # 0x1197060] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
Output #0, segment, to '/usr/share/nginx/html/uploads/testfile%02d.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
encoder : Lavf56.36.100
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 3161 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
Metadata:
creation_time : 2016-01-24 04:26:37
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
[mp4 # 0x11512a0] Codec for stream 0 does not use global headers but container format requires global headers
Use the segment muxer to break the input into segments:
ffmpeg -i testfile.mp4 -c copy -f segment -segment_time 1200 testfile_piece_%02d.mp4
This will split the source at keyframes, so segments may not be exactly 1200 seconds long. And the timestamps aren't reset, so some players will fail to play the 2nd and latter segments. If playability is needed, insert -reset_timestamps 1.
After the parallel encoding, you can stitch the generated segments by first creating a text file seg.txt like this
file 'encoded_testfile_piece_00.mp4'
file 'encoded_testfile_piece_01.mp4'
file 'encoded_testfile_piece_02.mp4'
file 'encoded_testfile_piece_03.mp4'
And then running
ffmpeg -f concat -i seg.txt -c copy -fflags +genpts encoded_full.mp4
I am simply trying to convert a vp9 webm I have into a vp8 webm. this is the command I'm using.
ffmpeg -i in.webm -c:v vp8 out.webm
the vp8 encoder returns a strange error
Input #0, matroska,webm, from 'in.webm':
Metadata:
encoder : google
Duration: 00:02:34.60, start: 0.000000, bitrate: 404 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709/unknown/unknown), 640x360, SAR 1:1 DAR 16:9, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
Stream mapping:
Stream #0:0 -> #0:0 (vp9 (native) -> vp8 (vp8_v4l2m2m))
Press [q] to stop, [?] for help
[vp8_v4l2m2m # 0x56195db9f9f0] Could not find a valid device
[vp8_v4l2m2m # 0x56195db9f9f0] can't configure encoder
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
Conversion failed!
In case I get any questions about whether I have the right encoders and decoders installed here is the output of ffmpeg -codecs | grep "vp[8-9]":
DEV.L. vp8 On2 VP8 (decoders: vp8 vp8_v4l2m2m vp8_cuvid ) (encoders: vp8_v4l2m2m )
D.V.L. vp9 Google VP9 (decoders: vp9 vp9_v4l2m2m vp9_cuvid )
Your ffmpeg build has a Video4Linux wrapper available for a hardware VP8 encoder, but no actual hardware VP8 encoder available.
For software encoding of VP8/VP9, you'll need libvpx enabled and linked. You can get a static git binary from https://johnvansickle.com/ffmpeg/
I'm getting the error bitrate tolerance too small for bitrate so far no problem. I know that there are several switches to increase that but nothing works.
ffmpeg -y -r 1/30 -b:v 999999k -bt 999999k -maxrate 999999k -i in.flv out%03d.jpg
The source of that commandline is directly from ffmpeg. But that crashes:
ffmpeg version N-44123-g5d55830 Copyright (c) 2000-2012 the FFmpeg developers
built on Sep 2 2012 20:23:29 with gcc 4.7.1 (GCC)
[...]
Input #0, flv, from 'in.flv':
Duration: 00:05:00.13, start: 0.000000, bitrate: 259 kb/s
Stream #0:0: Video: flv1, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: nellymoser, 22050 Hz, mono, s16
[mjpeg # 04356860] bitrate tolerance too small for bitrate
[mjpeg # 04317540] ff_frame_thread_encoder_init failed
Output #0, image2, to 'out%03d.jpg':
Stream #0:0: Video: mjpeg, yuvj420p, 320x240, q=2-31, 200 kb/s, 90k tbn, 0.03 tbc
Stream mapping:
Stream #0:0 -> #0:0 (flv -> mjpeg)
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Some ideas what I'm doing wrong?
I am trying to put a simple text on the bottom of video using ffmpeg on Ubuntu 12.04 . I tried this which is suggested in several places:
ffmpeg -i input.avi -vf drawtext="fontfile=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif.ttf:text='Text to write':fontsize=20:fontcolor=black:x=100:y=100" output.avi
But I get this error each time:
ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
built on Jun 12 2012 16:37:58 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, avi, from 'input.avi':
Duration: 04:09:09.66, start: 0.000000, bitrate: 480 kb/s
Stream #0.0: Video: mpeg4 (Advanced Simple Profile), yuv420p, 320x240 [PAR 1:1 DAR 4:3], 45 tbr, 45 tbn, 45 tbc
Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 64 kb/s
[buffer # 0x860d5a0] w:320 h:240 pixfmt:yuv420p
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
[ac3 # 0x8607a00] invalid bit rate
Output #0, avi, to 'output.avi':
Stream #0.0: Video: mpeg4, yuv420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 45 tbc
Stream #0.1: Audio: ac3, 48000 Hz, stereo, flt, 200 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height
Appreciate your help.
The documentation shows that you can use other parameters with x or y such as input video height and width and text width and height. To place the text on the bottom one method is y=main_h-text_h. If you want a little padding on the bottom you can use y=main_h-(text_h*2) To center it horizontally use x=(main_w/2-text_w/2).
I'm converting .mov files to .mpg files using avconv. The command being run by my php application is as follows:
avconv -y -i '$finalvideo' -target ntsc-dvd -aspect 4:3 '$mpgvideo' > $logs
I'm able to convert small .mov files to .mpg without any problems. However, I'm unable to convert videos that are over ten or fifteen minutes long. The log file is completely empty. When I run the command directly the frame stops somewhere around 34000 no matter which video I pick.
The cpu shows 97% usage on this process, however, nothing is happening.
OS Ubuntu 10~
How can I gather more information about this stalled process?
Here's the frozen output
avconv version 0.7, Copyright (c) 2000-2011 the Libav developers
built on Nov 3 2011 13:39:09 with gcc 4.3.3
Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 23.98 (24000/1001)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/sites/default/files/compiled_videos/573-stream.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.0.3
Duration: 00:18:53.49, start: 0.000000, bitrate: 1430 kb/s
Stream #0.0(eng): Video: h264 (Main), yuv420p, 854x480, 1387 kb/s, 25.60 fps, 23.98 tbr, 90k tbn, 180k tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 126 kb/s
Metadata:
creation_time : 1970-01-01 00:00:00
[buffer # 0x9d88820] w:854 h:480 pixfmt:yuv420p
[scale # 0x9d88b60] w:854 h:480 fmt:yuv420p -> w:720 h:480 fmt:yuv420p flags:0x4
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
Output #0, dvd, to '/var/www/sites/default/files/compiled_videos/573.mpg':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.10.0
Stream #0.0(eng): Video: mpeg2video, yuv420p, 720x480 [PAR 8:9 DAR 4:3], q=2-31, 6000 kb/s, 90k tbn, 29.97 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Stream #0.1(eng): Audio: ac3, 48000 Hz, stereo, flt, 448 kb/s
Metadata:
creation_time : 1970-01-01 00:00:00
Stream mapping:
Stream #0.0 -> #0.0 (h264 -> mpeg2video)
Stream #0.1 -> #0.1 (aac -> ac3)
Press ctrl-c to stop encoding
[mpeg2video # 0x9d8bf20] rc buffer underflow
Input stream #0.1 frame changed from rate:48000 fmt:s16 ch:2 to rate:48000 fmt:flt ch:2
frame=33910 fps= 91 q=2.0 size= 151922kB time=336.58 bitrate=3697.7kbits/s dup=5475 drop=530
Oh interesting. I used -loglevel debug -debug. I was seeing this information
stream #0:
keyframe=0
duration=0.000
dts=1133.449 pts=1133.533
size=103
*** 1 dup!
stream #0:
keyframe=0
duration=0.000
dts=1133.449 pts=1133.449
size=104
Until I finally received this message
*** drop!
I have posted my bug with libav
http://bugzilla.libav.org/show_bug.cgi?id=67
thanks for your help.
Try running avconv with a higher log level: -loglevel debug.
That should give you more data. Also, try -dump and -debug.
Are you sure it's not because you're hitting a storage cap?
I ran into this recently with ffmpeg while converting some oddly sized video clips to a "standard" 16:9 x264 & AAC streams inside a mp4 container. When that "Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'" message would show up, my ffmpeg process would frequently just hang indefinitely at 100% CPU use.
I finally found that the issue, at least in my case, was that because of the conversions I was doing (transcoding to an intermediary format then to the final, desired output), it was actually the number of audio stream channels that caused the encode process to hang. By telling ffmpeg to convert the audio stream to 2-channel, I was able to fix this issue permanently.
The same solution will probably apply to avconv. In the ffmpeg world (and because I'm stuck with an outdated version), I merely needed to add -ac 2 to my ffmpeg command and everything worked perfectly!
Hope that helps :)