Hi Neil,
I have to look deeper into the MKV side of things and most likely raise it
with the cellar mailing list so that better minds than mine can weigh in. I
do see that the rounding up to 704 could be an issue alright.
As for MOV, your patch appears to generate the same output clap values as
the input, so that's really great! command line and mediainfo trace below:
$ ./ffmpeg -i /mnt/c/Users/blaaa/Downloads/clap.mov -c:v v210 newv210.mov
&& mediainfo --Details=1 newv210.mov |grep -i clap -n10
ffmpeg version N-97506-g2fae000994 Copyright (c) 2000-2020 the FFmpeg
developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration:
libavutil 56. 43.100 / 56. 43.100
libavcodec 58. 82.100 / 58. 82.100
libavformat 58. 42.101 / 58. 42.101
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 79.100 / 7. 79.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'/mnt/c/Users/blaaa/Downloads/clap.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2018-09-13T08:48:41.000000Z
Duration: 00:00:01.00, start: 0.000000, bitrate: 80686 kb/s
Stream #0:0(eng): Video: v210 (v210 / 0x30313276),
yuv422p10le(smpte170m/bt470bg/bt709, top coded first (swapped)), 720x576,
79626 kb/s, SAR 59:54 DAR 295:216, 9 fps, 25 tbr, 25k tbn, 25k tbc (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Video Media Handler
encoder : Uncompressed 10-Bit YUV
timecode : 00:00:00:00
Side data:
Clean aperture:[width 41472/59 height:576/1 h_offset:0/1 v_offset:0/1]
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz,
stereo, s32 (24 bit), 2304 kb/s (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Sound Media Handler
timecode : 00:00:00:00
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : Time Code Media Handler
reel_name : 001
timecode : 00:00:00:00
File 'newv210.mov' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (v210 (native) -> v210 (native))
Stream #0:1 -> #0:1 (pcm_s24le (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, mov, to 'newv210.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf58.42.101
Stream #0:0(eng): Video: v210 (v210 / 0x30313276), yuv422p10le(top
coded first (swapped)), 720x576 [SAR 59:54 DAR 295:216], q=2-31, 221184
kb/s, 0.04 fps, 12800 tbn, 25 tbc (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Video Media Handler
timecode : 00:00:00:00
encoder : Lavc58.82.100 v210
Side data:
Clean aperture:[width 41472/59 height:576/1 h_offset:0/1 v_offset:0/1]
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp (24 bit), 128 kb/s (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Sound Media Handler
timecode : 00:00:00:00
encoder : Lavc58.82.100 aac
frame= 25 fps=0.0 q=-0.0 Lsize= 27009kB time=00:00:00.96
bitrate=230455.2kbits/s dup=16 drop=0 speed=19.8x
video:27000kB audio:6kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.008794%
[aac @ 0x7fffe91cc680] Qavg: 171.537
226-1A5FBA4 detail: 9 (0x09)
227-1A5FBA5 Pixel Aspect Ratio (16 bytes)
228-1A5FBA5 Header (8 bytes)
229-1A5FBA5 Size: 16 (0x00000010)
230-1A5FBA9 Name: pasp
231-1A5FBAD hSpacing: 59 (0x0000003B)
232-1A5FBB1 vSpacing: 54 (0x00000036)
233-1A5FBB5 Clean Aperture (40 bytes)
234-1A5FBB5 Header (8 bytes)
235-1A5FBB5 Size: 40 (0x00000028)
236:1A5FBB9 Name: clap
237-1A5FBBD apertureWidth_N: 41472 (0x0000A200)
238-1A5FBC1 apertureWidth_D: 59 (0x0000003B)
239-1A5FBC5 apertureHeight_N: 576 (0x00000240)
240-1A5FBC9 apertureHeight_D: 1 (0x00000001)
241-1A5FBCD horizOff_N: 0 (0x00000000)
242-1A5FBD1 horizOff_D: 1 (0x00000001)
243-1A5FBD5 vertOff_N: 0 (0x00000000)
244-1A5FBD9 vertOff_D: 1 (0x00000001)
245-1A5FBDD Time to Sample (24 bytes)
246-1A5FBDD Header (8 bytes)
and here's similar info for mkv:
./ffmpeg -i /mnt/c/Users/blaaa/Downloads/clap.mov -c:v v210 newv210.mkv &&
m
ediainfo --Details=1 newv210.mkv |grep -i pixel -n10
ffmpeg version N-97506-g2fae000994 Copyright (c) 2000-2020 the FFmpeg
developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration:
libavutil 56. 43.100 / 56. 43.100
libavcodec 58. 82.100 / 58. 82.100
libavformat 58. 42.101 / 58. 42.101
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 79.100 / 7. 79.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'/mnt/c/Users/blaaa/Downloads/clap.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2018-09-13T08:48:41.000000Z
Duration: 00:00:01.00, start: 0.000000, bitrate: 80686 kb/s
Stream #0:0(eng): Video: v210 (v210 / 0x30313276),
yuv422p10le(smpte170m/bt470bg/bt709, top coded first (swapped)), 720x576,
79626 kb/s, SAR 59:54 DAR 295:216, 9 fps, 25 tbr, 25k tbn, 25k tbc (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Video Media Handler
encoder : Uncompressed 10-Bit YUV
timecode : 00:00:00:00
Side data:
Clean aperture:[width 41472/59 height:576/1 h_offset:0/1 v_offset:0/1]
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz,
stereo, s32 (24 bit), 2304 kb/s (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Sound Media Handler
timecode : 00:00:00:00
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : Time Code Media Handler
reel_name : 001
timecode : 00:00:00:00
File 'newv210.mkv' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (v210 (native) -> v210 (native))
Stream #0:1 -> #0:1 (pcm_s24le (native) -> ac3 (native))
Press [q] to stop, [?] for help
Output #0, matroska, to 'newv210.mkv':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf58.42.101
Stream #0:0(eng): Video: v210 (v210 / 0x30313276), yuv422p10le(top
coded first (swapped)), 720x576 [SAR 59:54 DAR 295:216], q=2-31, 221184
kb/s, 25 fps, 1k tbn, 25 tbc (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Video Media Handler
timecode : 00:00:00:00
encoder : Lavc58.82.100 v210
Side data:
Clean aperture:[width 41472/59 height:576/1 h_offset:0/1 v_offset:0/1]
Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo,
fltp (24 bit), 192 kb/s (default)
Metadata:
creation_time : 2018-09-13T08:48:41.000000Z
handler_name : ?Apple Sound Media Handler
timecode : 00:00:00:00
encoder : Lavc58.82.100 ac3
frame= 9 fps=0.0 q=-0.0 Lsize= 9731kB time=00:00:00.41
bitrate=193962.2kbits/s speed=10.6x
video:9720kB audio:10kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.015487%
193-000144 Data: 40000000 (0x02625A00)
194-000148 CodecID - V_MS/VFW/FOURCC (17 bytes)
195-000148 Header (2 bytes)
196-000148 Name: 6 (0x06)
197-000149 Size: 15 (0x0F)
198-00014A Data: V_MS/VFW/FOURCC
199-000159 Video (52 bytes)
200-000159 Header (9 bytes)
201-000159 Name: 96 (0x60)
202-00015A Size: 43 (0x0000000000002B)
203:000162 PixelWidth - 720 (0x2D0) (4 bytes)
204-000162 Header (2 bytes)
205-000162 Name: 48 (0x30)
206-000163 Size: 2 (0x02)
207-000164 Data: 720 (0x02D0)
208:000166 PixelHeight - 576 (0x240) (4 bytes)
209-000166 Header (2 bytes)
210-000166 Name: 58 (0x3A)
211-000167 Size: 2 (0x02)
212-000168 Data: 576 (0x0240)
213-00016A FlagInterlaced - 1 (0x1) (3 bytes)
214-00016A Header (2 bytes)
215-00016A Name: 26 (0x1A)
216-00016B Size: 1 (0x01)
217-00016C Data: 1 (0x01)
218-00016D FieldOrder - 9 (0x9) (3 bytes)
--
228-000175 DisplayHeight - 216 (0xD8) (4 bytes)
229-000175 Header (3 bytes)
230-000175 Name: 5306 (0x14BA)
231-000177 Size: 1 (0x01)
232-000178 Data: 216 (0xD8)
233-000179 DisplayUnit - 3 (0x3) (4 bytes)
234-000179 Header (3 bytes)
235-000179 Name: 5298 (0x14B2)
236-00017B Size: 1 (0x01)
237-00017C Data: 3 (0x03)
238:00017D PixelCropLeft - 8 (0x8) (4 bytes)
239-00017D Header (3 bytes)
240-00017D Name: 5324 (0x14CC)
241-00017F Size: 1 (0x01)
242-000180 Data: 8 (0x08)
243:000181 PixelCropRight - 8 (0x8) (4 bytes)
244-000181 Header (3 bytes)
245-000181 Name: 5341 (0x14DD)
246-000183 Size: 1 (0x01)
247-000184 Data: 8 (0x08)
248:000185 PixelCropBottom - 0 (0x0) (4 bytes)
249-000185 Header (3 bytes)
250-000185 Name: 5290 (0x14AA)
251-000187 Size: 1 (0x01)
252-000188 Data: 0 (0x00)
253:000189 PixelCropTop - 0 (0x0) (4 bytes)
254-000189 Header (3 bytes)
255-000189 Name: 5307 (0x14BB)
256-00018B Size: 1 (0x01)
257-00018C Data: 0 (0x00)
258-00018D CodecPrivate - Copy of vids (43 bytes)
259-00018D Header (3 bytes)
260-00018D Name: 9122 (0x23A2)
261-00018F Size: 40 (0x28)
262-000190 Size: 40 (0x00000028)
263-000194 Width: 720 (0x000002D0)
Best,
Kieran O'Leary
Irish Film Institute
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