[FFmpeg-trac] #6302(ffmpeg:new): gif frame delay dropped from last frame when output to webm

FFmpeg trac at avcodec.org
Mon Apr 10 17:27:40 EEST 2017


#6302: gif frame delay dropped from last frame when output to webm
-----------------------------------+--------------------------------------
             Reporter:  okor       |                     Type:  defect
               Status:  new        |                 Priority:  important
            Component:  ffmpeg     |                  Version:  git-master
             Keywords:  gif, webm  |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
-----------------------------------+--------------------------------------
 '''Summary of the bug:'''
 When converting a gif to a webm video the delay is not honored on the last
 frame. For example, using a gif with two frames - each with a 2 second
 delay the output webm video should be 4 seconds in length but the output
 is 2 seconds long and only those the second frame for an instant.

 Inversely, if no filters and mp4 is used, the output is perfect.

 Input: ‚Äčhttps://cdn0.vox-
 cdn.com/uploads/chorus_asset/file/8251197/7GPW_LivingRoom.gif

 Output: <attatched>

 '''How to reproduce:'''
 {{{
 ffmpeg -i livingroom.gif livingroom.webm
 }}}

 '''Log:'''
 {{{
 $ ffmpeg -v 9 -loglevel 99 -report -i livingroom.gif livingroom.webm
 ffmpeg started on 2017-04-10 at 10:14:17
 Report written to "ffmpeg-20170410-101417.log"
 ffmpeg version N-85306-ge7ec8c1 Copyright (c) 2000-2017 the FFmpeg
 developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --enable-gpl --enable-libx264 --enable-libfdk-aac
 --enable-libvpx --enable-libmp3lame --enable-nonfree
   libavutil      55. 60.100 / 55. 60.100
   libavcodec     57. 92.100 / 57. 92.100
   libavformat    57. 72.100 / 57. 72.100
   libavdevice    57.  7.100 / 57.  7.100
   libavfilter     6. 84.100 /  6. 84.100
   libswscale      4.  7.100 /  4.  7.100
   libswresample   2.  8.100 /  2.  8.100
   libpostproc    54.  6.100 / 54.  6.100
 Splitting the commandline.
 Reading option '-v' ... matched as option 'v' (set logging level) with
 argument '9'.
 Reading option '-loglevel' ... matched as option 'loglevel' (set logging
 level) with argument '99'.
 Reading option '-report' ... matched as option 'report' (generate a
 report) with argument '1'.
 Reading option '-i' ... matched as input url with argument
 'livingroom.gif'.
 Reading option 'livingroom.webm' ... matched as output url.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option v (set logging level) with argument 9.
 Applying option report (generate a report) with argument 1.
 Successfully parsed a group of options.
 Parsing a group of options: input url livingroom.gif.
 Successfully parsed a group of options.
 Opening an input file: livingroom.gif.
 [file @ 0x7fb8e3c16d80] Setting default whitelist 'file,crypto'
 Probing gif score:100 size:2048
 Probing mp3 score:1 size:2048
 [gif @ 0x7fb8e4014200] Format gif probed with size=2048 and score=100
 [gif @ 0x7fb8e4014200] Before avformat_find_stream_info() pos: 0 bytes
 read:32768 seeks:0 nb_streams:1
 [gif @ 0x7fb8e4014200] stream 0: start_time: -92233720368547760.000
 duration: -92233720368547760.000
 [gif @ 0x7fb8e4014200] format: start_time: -9223372036854.775 duration:
 -9223372036854.775 bitrate=0 kb/s
 [gif @ 0x7fb8e4014200] After avformat_find_stream_info() pos: 3318802
 bytes read:6652701 seeks:2 frames:2
 Input #0, gif, from 'livingroom.gif':
   Duration: N/A, bitrate: N/A
     Stream #0:0, 2, 1/100: Video: gif, 1 reference frame, bgra, 2432x1556,
 0/1, 100 tbr, 100 tbn, 100 tbc
 Successfully opened the file.
 Parsing a group of options: output url livingroom.webm.
 Successfully parsed a group of options.
 Opening an output file: livingroom.webm.
 [file @ 0x7fb8e3c190c0] Setting default whitelist 'file,crypto'
 Successfully opened the file.
 Stream mapping:
   Stream #0:0 -> #0:0 (gif (native) -> vp9 (libvpx-vp9))
 Press [q] to stop, [?] for help
 cur_dts is invalid (this is harmless if it occurs once at the start per
 stream)
 [gif @ 0x7fb8e4025800] code=21 '!'
     Last message repeated 1 times
 [gif @ 0x7fb8e4025800] code=2c ','
 detected 8 logical cores
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] Setting 'video_size' to
 value '2432x1556'
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] Setting 'pix_fmt' to
 value '30'
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] Setting 'time_base' to
 value '1/100'
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] Setting 'pixel_aspect' to
 value '0/1'
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] Setting 'sws_param' to
 value 'flags=2'
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] Setting 'frame_rate' to
 value '100/1'
 [graph 0 input from stream 0:0 @ 0x7fb8e3e00300] w:2432 h:1556 pixfmt:bgra
 tb:1/100 fr:100/1 sar:0/1 sws_param:flags=2
 [format @ 0x7fb8e3e009c0] compat: called with
 args=[yuv420p|yuva420p|yuv422p|yuv440p|yuv444p|gbrp]
 [format @ 0x7fb8e3e009c0] Setting 'pix_fmts' to value
 'yuv420p|yuva420p|yuv422p|yuv440p|yuv444p|gbrp'
 [auto_scaler_0 @ 0x7fb8e3e00e80] Setting 'flags' to value 'bicubic'
 [auto_scaler_0 @ 0x7fb8e3e00e80] w:iw h:ih flags:'bicubic' interl:0
 [format @ 0x7fb8e3e009c0] auto-inserting filter 'auto_scaler_0' between
 the filter 'Parsed_null_0' and the filter 'format'
 [AVFilterGraph @ 0x7fb8e3d00040] query_formats: 4 queried, 2 merged, 1
 already done, 0 delayed
 [auto_scaler_0 @ 0x7fb8e3e00e80] picking yuva420p out of 6 ref:bgra
 alpha:1
 [auto_scaler_0 @ 0x7fb8e3e00e80] w:2432 h:1556 fmt:bgra sar:0/1 -> w:2432
 h:1556 fmt:yuva420p sar:0/1 flags:0x4
 [libvpx-vp9 @ 0x7fb8e4028000] v1.6.1
 [libvpx-vp9 @ 0x7fb8e4028000] --prefix=/usr/local/Cellar/libvpx/1.6.1
 --disable-dependency-tracking --enable-pic --disable-unit-tests --disable-
 examples
 [libvpx-vp9 @ 0x7fb8e4028000] vpx_codec_enc_cfg
 [libvpx-vp9 @ 0x7fb8e4028000] generic settings
   g_usage:                      0
   g_threads:                    8
   g_profile:                    0
   g_w:                          320
   g_h:                          240
   g_bit_depth:                  8
   g_input_bit_depth:            8
   g_timebase:                   {1/30}
   g_error_resilient:            0
   g_pass:                       0
   g_lag_in_frames:              25
 [libvpx-vp9 @ 0x7fb8e4028000] rate control settings
   rc_dropframe_thresh:          0
   rc_resize_allowed:            0
   rc_resize_up_thresh:          60
   rc_resize_down_thresh:        30
   rc_end_usage:                 0
   rc_twopass_stats_in:          0x0(0)
   rc_target_bitrate:            256
 [libvpx-vp9 @ 0x7fb8e4028000] quantizer settings
   rc_min_quantizer:             0
   rc_max_quantizer:             63
 [libvpx-vp9 @ 0x7fb8e4028000] bitrate tolerance
   rc_undershoot_pct:            25
   rc_overshoot_pct:             25
 [libvpx-vp9 @ 0x7fb8e4028000] decoder buffer model
   rc_buf_sz:                    6000
   rc_buf_initial_sz:            4000
   rc_buf_optimal_sz:            5000
 [libvpx-vp9 @ 0x7fb8e4028000] 2 pass rate control settings
   rc_2pass_vbr_bias_pct:        50
   rc_2pass_vbr_minsection_pct:  0
   rc_2pass_vbr_maxsection_pct:  2000
 [libvpx-vp9 @ 0x7fb8e4028000] keyframing settings
   kf_mode:                      1
   kf_min_dist:                  0
   kf_max_dist:                  128
 [libvpx-vp9 @ 0x7fb8e4028000]
 [libvpx-vp9 @ 0x7fb8e4028000] vpx_codec_enc_cfg
 [libvpx-vp9 @ 0x7fb8e4028000] generic settings
   g_usage:                      0
   g_threads:                    0
   g_profile:                    0
   g_w:                          2432
   g_h:                          1556
   g_bit_depth:                  8
   g_input_bit_depth:            8
   g_timebase:                   {1/100}
   g_error_resilient:            0
   g_pass:                       0
   g_lag_in_frames:              25
 [libvpx-vp9 @ 0x7fb8e4028000] rate control settings
   rc_dropframe_thresh:          0
   rc_resize_allowed:            0
   rc_resize_up_thresh:          60
   rc_resize_down_thresh:        30
   rc_end_usage:                 0
   rc_twopass_stats_in:          0x0(0)
   rc_target_bitrate:            200
 [libvpx-vp9 @ 0x7fb8e4028000] quantizer settings
   rc_min_quantizer:             0
   rc_max_quantizer:             63
 [libvpx-vp9 @ 0x7fb8e4028000] bitrate tolerance
   rc_undershoot_pct:            25
   rc_overshoot_pct:             25
 [libvpx-vp9 @ 0x7fb8e4028000] decoder buffer model
   rc_buf_sz:                    6000
   rc_buf_initial_sz:            4000
   rc_buf_optimal_sz:            5000
 [libvpx-vp9 @ 0x7fb8e4028000] 2 pass rate control settings
   rc_2pass_vbr_bias_pct:        50
   rc_2pass_vbr_minsection_pct:  0
   rc_2pass_vbr_maxsection_pct:  2000
 [libvpx-vp9 @ 0x7fb8e4028000] keyframing settings
   kf_mode:                      1
   kf_min_dist:                  0
   kf_max_dist:                  128
 [libvpx-vp9 @ 0x7fb8e4028000]
 [libvpx-vp9 @ 0x7fb8e4028000] vpx_codec_control
 [libvpx-vp9 @ 0x7fb8e4028000]   VP8E_SET_CPUUSED:             1
 [libvpx-vp9 @ 0x7fb8e4028000]   VP8E_SET_ARNR_MAXFRAMES:      0
 [libvpx-vp9 @ 0x7fb8e4028000]   VP8E_SET_ARNR_STRENGTH:       3
 [libvpx-vp9 @ 0x7fb8e4028000]   VP8E_SET_ARNR_TYPE:           3
 [libvpx-vp9 @ 0x7fb8e4028000]   VP8E_SET_STATIC_THRESHOLD:    0
 [libvpx-vp9 @ 0x7fb8e4028000]   VP9E_SET_COLOR_SPACE:         0
 [libvpx-vp9 @ 0x7fb8e4028000]   VP9E_SET_COLOR_RANGE:         0
 [libvpx-vp9 @ 0x7fb8e4028000]   VP9E_SET_TARGET_LEVEL:        255
 [libvpx-vp9 @ 0x7fb8e4028000] Using deadline: 1000000
 Output #0, webm, to 'livingroom.webm':
   Metadata:
     encoder         : Lavf57.72.100
     Stream #0:0, 0, 1/1000: Video: vp9 (libvpx-vp9), 1 reference frame,
 yuva420p, 2432x1556, 0/1, q=-1--1, 200 kb/s, 100 fps, 1k tbn, 100 tbc
     Metadata:
       encoder         : Lavc57.92.100 libvpx-vp9
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
 Clipping frame in rate conversion by 0.000008
 cur_dts is invalid (this is harmless if it occurs once at the start per
 stream)
 [gif @ 0x7fb8e4025800] code=21 '!'
 [gif @ 0x7fb8e4025800] code=2c ','
 cur_dts is invalid (this is harmless if it occurs once at the start per
 stream)
     Last message repeated 1 times
 No more output streams to write to, finishing.
 Automatically inserted bitstream filter 'vp9_superframe'; args=''
 [webm @ 0x7fb8e4026800] get_metadata_duration returned: 0
 [webm @ 0x7fb8e4026800] Writing block at offset 3, size 6415, pts 0, dts
 0, duration 10, keyframe 1
 [webm @ 0x7fb8e4026800] Writing block at offset 6846, size 4532, pts 2000,
 dts 2000, duration 10, keyframe 0
 [webm @ 0x7fb8e4026800] end duration = 2010
 frame=    2 fps=1.2 q=0.0 Lsize=      12kB time=00:00:02.00 bitrate=
 47.8kbits/s speed=1.18x
 video:11kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 9.290216%
 Input file #0 (livingroom.gif):
   Input stream #0:0 (video): 2 packets read (3318801 bytes); 2 frames
 decoded;
   Total: 2 packets (3318801 bytes) demuxed
 Output file #0 (livingroom.webm):
   Output stream #0:0 (video): 2 frames encoded; 2 packets muxed (10947
 bytes);
   Total: 2 packets (10947 bytes) muxed
 2 frames successfully decoded, 0 decoding errors
 [AVIOContext @ 0x7fb8e3c18f40] Statistics: 17 seeks, 14 writeouts
 [AVIOContext @ 0x7fb8e3c16c60] Statistics: 6652701 bytes read, 2 seeks
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6302>
FFmpeg <https://ffmpeg.org>
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