This is sort of a shot in the dark, but DNxHD only supports a few bitrates (36,
145, and 220 Mb/s). It may be that the ffmpeg implementation of the encoder
requires you to explicitly pass the bitrate.
-Nathan
From: Jacob Harris
Sent: Monday, June 18, 2012 2:02 PM
To: [email protected]
Subject: [Nuke-users] DNxHD ffmpeg error
I'm looking for some DNxHD ffmpeg help. I've stripped a more complicated
command down to its barebones to try and get rid of this error. The error is:
Error while opening encoder for output stream #4:0 - maybe incorrect parameters
such as bit_rate, rate, width or height
As soon as I change 'dnxhd' to anything else, like 'dpx', it works. Is this an
Avid codec issue? I'm pretty sure the included libavcodec has the lastest
codecs in it. Is this an installation issue? An ffmpeg bug? User friggin' error?
Here's the long-form output:
jacobharris@devmac001 : ~/ffmpeg
$ ./ffmpeg -i ~/sequence.*.dpx -vcodec dnxhd -f mov ~/movie.mov
ffmpeg version git-2012-06-09-04e2ac4 Copyright (c) 2000-2012 the FFmpeg
developers
built on Jun 8 2012 19:09:52 with gcc 4.2.1 (Apple Inc. build 5646)
configuration: --disable-yasm
libavutil 51. 56.100 / 51. 56.100
libavcodec 54. 25.100 / 54. 25.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 78.101 / 2. 78.101
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
[image2 @ 0x10100f200] Stream #0: not enough frames to estimate rate; consider
increasing probesize
Input #0, image2, from '/home/jacobharris/sequence.1001.dpx':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: dpx, rgb48le, 2276x1138 [SAR 1200:1200 DAR 2:1], 25 tbr,
25 tbn, 25 tbc
File '/home/jacobharris/movie.mov' already exists. Overwrite ? [y/N] y
w:2276 h:1138 pixfmt:rgb48le tb:1/25 sar:1200/1200 sws_param:flags=2
[ffmpeg_buffersink @ 0x100f13fa0] No opaque field provided
[buffer @ 0x100f14900] w:2276 h:1138 pixfmt:rgb48le tb:1/25 sar:1200/1200
sws_param:flags=2
[ffmpeg_buffersink @ 0x100f14c00] No opaque field provided
[buffer @ 0x100f15540] w:2276 h:1138 pixfmt:rgb48le tb:1/25 sar:1200/1200
sws_param:flags=2
[ffmpeg_buffersink @ 0x100f15840] No opaque field provided
[buffer @ 0x100f16140] w:2276 h:1138 pixfmt:rgb48le tb:1/25 sar:1200/1200
sws_param:flags=2
[ffmpeg_buffersink @ 0x100f16440] No opaque field provided
[buffer @ 0x100f16d60] w:2276 h:1138 pixfmt:rgb48le tb:1/25 sar:1200/1200
sws_param:flags=2
[ffmpeg_buffersink @ 0x100f17060] No opaque field provided
[format @ 0x100f172e0] auto-inserting filter 'auto-inserted scaler 0' between
the filter 'Parsed_null_0' and the filter 'format'
[auto-inserted scaler 0 @ 0x100f17660] w:2276 h:1138 fmt:rgb48le sar:1200/1200
-> w:2276 h:1138 fmt:yuv422p sar:1/1 flags:0x4
[dnxhd @ 0x101067800] video parameters incompatible with DNxHD
Output #0, image2, to '/home/jacobharris/sequence.1002.dpx':
Stream #0:0: Video: dpx, rgb48le, 2276x1138 [SAR 1200:1200 DAR 2:1], q=2-31,
200 kb/s, 90k tbn, 25 tbc
Output #1, image2, to '/home/jacobharris/sequence.1003.dpx':
Stream #1:0: Video: dpx, rgb48le, 2276x1138 [SAR 1200:1200 DAR 2:1], q=2-31,
200 kb/s, 90k tbn, 25 tbc
Output #2, image2, to '/home/jacobharris/sequence.1004.dpx':
Stream #2:0: Video: dpx, rgb48le, 2276x1138 [SAR 1200:1200 DAR 2:1], q=2-31,
200 kb/s, 90k tbn, 25 tbc
Output #3, image2, to '/home/jacobharris/sequence.1005.dpx':
Stream #3:0: Video: dpx, rgb48le, 2276x1138 [SAR 1200:1200 DAR 2:1], q=2-31,
200 kb/s, 90k tbn, 25 tbc
Output #4, mov, to '/home/jacobharris/movie.mov':
Stream #4:0: Video: dnxhd, yuv422p, 2276x1138 [SAR 1:1 DAR 2:1], q=2-1024,
200 kb/s, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (dpx -> dpx)
Stream #0:0 -> #1:0 (dpx -> dpx)
Stream #0:0 -> #2:0 (dpx -> dpx)
Stream #0:0 -> #3:0 (dpx -> dpx)
Stream #0:0 -> #4:0 (dpx -> dnxhd)
Error while opening encoder for output stream #4:0 - maybe incorrect parameters
such as bit_rate, rate, width or height
--------------------------------------------------------------------------------
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