December 2018 - FFmpeg-trac - lists.ffmpeg.org

#6203(avfilter:new): 'Color' filter does not always choose format correctly
by FFmpeg 02 Dec '18

02 Dec '18

#6203: 'Color' filter does not always choose format correctly ----------------------------------+-------------------------------------- Reporter: Misaki | Type: defect Status: new | Priority: normal Component: avfilter | Version: git-master Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ----------------------------------+-------------------------------------- The 'color' filter produces frames of a specific color. This can include alpha channel with a color like "black(a)0.5". However, if it is followed by a scale filter including scale2ref, the output format of 'color' filter is yuv420p, instead of yuva420p, so the alpha channel is lost. The context of this is creating a filter chain (for ffplay) that scales down the video and adds a shadow, then overlays it on a zoomed-in image. The shadow's base transparency was lost when adding in the new scale2ref filter. The above pretty much describes the issue, but here is the example made when I thought it was a bug with the new scale2ref filter: {{{ misaki@dawn:~/software/ffmpeg$ ./ffmpeg -filter_complex color=black@0.5:d=0.1,split,scale2ref[a][b],[b]nullsink,[a]showinfo,split,overlay -f null - ffmpeg version N-83585-ga5c1c7a8b3-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.1 (Debian 5.4.1-5) 20170205 configuration: --enable-gpl --enable-version3 --enable-static --disable- debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable- gray --enable-libass --enable-libfreetype --enable-libfribidi --enable- libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable- libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable- libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg libavutil 55. 47.100 / 55. 47.100 libavcodec 57. 80.101 / 57. 80.101 libavformat 57. 66.102 / 57. 66.102 libavdevice 57. 2.100 / 57. 2.100 libavfilter 6. 73.100 / 6. 73.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 [Parsed_showinfo_4 @ 0x3e8bac0] config in time_base: 1/25, frame_rate: 25/1 [Parsed_showinfo_4 @ 0x3e8bac0] config out time_base: 0/0, frame_rate: 0/0 Output #0, null, to 'pipe:': Metadata: encoder : Lavf57.66.102 Stream #0:0: Video: wrapped_avframe, yuva420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: encoder : Lavc57.80.101 wrapped_avframe Stream mapping: overlay -> Stream #0:0 (wrapped_avframe) Press [q] to stop, [?] for help [Parsed_showinfo_4 @ 0x3e8bac0] n: 0 pts: 0 pts_time:0 pos: -1 fmt:yuva420p sar:1/1 s:320x240 i:P iskey:1 type:I checksum:02EDAAF8 plane_checksum:[35B2C10E 2BAB822B 2BAB822B 77F0E576] mean:[16 128 128 255] stdev:[0.0 0.0 0.0 0.0] [Parsed_showinfo_4 @ 0x3e8bac0] n: 1 pts: 1 pts_time:0.04 pos: -1 fmt:yuva420p sar:1/1 s:320x240 i:P iskey:1 type:I checksum:02EDAAF8 plane_checksum:[35B2C10E 2BAB822B 2BAB822B 77F0E576] mean:[16 128 128 255] stdev:[0.0 0.0 0.0 0.0] [Parsed_showinfo_4 @ 0x3e8bac0] n: 2 pts: 2 pts_time:0.08 pos: -1 fmt:yuva420p sar:1/1 s:320x240 i:P iskey:1 type:I checksum:02EDAAF8 plane_checksum:[35B2C10E 2BAB822B 2BAB822B 77F0E576] mean:[16 128 128 255] stdev:[0.0 0.0 0.0 0.0] frame= 3 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.12 bitrate=N/A speed=7.63x video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown misaki@dawn:~/software/ffmpeg$ ./ffmpeg -filter_complex color=black@0.5:d=0.1,showinfo,split,overlay -f null - ffmpeg version N-83585-ga5c1c7a8b3-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.1 (Debian 5.4.1-5) 20170205 configuration: --enable-gpl --enable-version3 --enable-static --disable- debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable- gray --enable-libass --enable-libfreetype --enable-libfribidi --enable- libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable- libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable- libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg libavutil 55. 47.100 / 55. 47.100 libavcodec 57. 80.101 / 57. 80.101 libavformat 57. 66.102 / 57. 66.102 libavdevice 57. 2.100 / 57. 2.100 libavfilter 6. 73.100 / 6. 73.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 [Parsed_showinfo_1 @ 0x4aaf2c0] config in time_base: 1/25, frame_rate: 25/1 [Parsed_showinfo_1 @ 0x4aaf2c0] config out time_base: 0/0, frame_rate: 0/0 Output #0, null, to 'pipe:': Metadata: encoder : Lavf57.66.102 Stream #0:0: Video: wrapped_avframe, yuva420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: encoder : Lavc57.80.101 wrapped_avframe Stream mapping: overlay -> Stream #0:0 (wrapped_avframe) Press [q] to stop, [?] for help [Parsed_showinfo_1 @ 0x4aaf2c0] n: 0 pts: 0 pts_time:0 pos: -1 fmt:yuva420p sar:1/1 s:320x240 i:P iskey:1 type:I checksum:553FA22E plane_checksum:[35B2C10E 2BAB822B 2BAB822B CA42DCAC] mean:[16 128 128 127] stdev:[0.0 0.0 0.0 0.0] [Parsed_showinfo_1 @ 0x4aaf2c0] n: 1 pts: 1 pts_time:0.04 pos: -1 fmt:yuva420p sar:1/1 s:320x240 i:P iskey:1 type:I checksum:553FA22E plane_checksum:[35B2C10E 2BAB822B 2BAB822B CA42DCAC] mean:[16 128 128 127] stdev:[0.0 0.0 0.0 0.0] [Parsed_showinfo_1 @ 0x4aaf2c0] n: 2 pts: 2 pts_time:0.08 pos: -1 fmt:yuva420p sar:1/1 s:320x240 i:P iskey:1 type:I checksum:553FA22E plane_checksum:[35B2C10E 2BAB822B 2BAB822B CA42DCAC] mean:[16 128 128 127] stdev:[0.0 0.0 0.0 0.0] frame= 3 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.12 bitrate=N/A speed= 9.2x video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown }}} The 'split,overlay' is to retain the alpha channel, since otherwise it doesn't exist. In the first case, alpha is at 255 because it was dropped then re-added. In the second case, it is 127. Verbose output for the first case shows this: {{{ [Parsed_color_0 @ 0x594e700] size:320x240 rate:25/1 duration:0.100000 sar:1/1 [Parsed_scale2ref_2 @ 0x594f6c0] w:iw h:ih flags:'bilinear' interl:0 [Parsed_color_0 @ 0x5950ac0] size:320x240 rate:25/1 duration:0.100000 sar:1/1 [Parsed_scale2ref_2 @ 0x5951b00] w:iw h:ih flags:'bilinear' interl:0 [Parsed_scale2ref_2 @ 0x5951b00] w:320 h:240 fmt:yuv420p sar:1/1 -> w:320 h:240 fmt:yuva420p sar:1/1 flags:0x2 }}} Which reveals that output from 'color' filter was yuv420p, though testing shows that the first resolution and format for the scale2ref filter is actually for the reference frame, not the frame that's modified. I note that this static build is actually a few weeks old I think but I don't think I could successfully build it myself from the source, so it's the most recent available to me. Not sure what keywords to add since the color filter has several names. (In this particular case, you can avoid the problem by adding a format filter between the 'color' and 'scale[2ref]' filters but many people won't realize they need to.) -- Ticket URL: <https://trac.ffmpeg.org/ticket/6203> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#7281(avformat:new): fMP4 Single File Generation is excruciatingly slow
by FFmpeg 02 Dec '18

02 Dec '18

#7281: fMP4 Single File Generation is excruciatingly slow -----------------------------------+-------------------------------------- Reporter: ronak2121 | Type: defect Status: new | Priority: important Component: avformat | Version: git-master Keywords: hls fMP4 | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -----------------------------------+-------------------------------------- Summary of the bug: Using a 20 hour audio mp4 file, try to make an fMP4 file (either HLS or DASH/HLS mode), using -codec copy to ensure there's no encoding being done. ffmpeg will take several hours to fragment the file. Compare this to Apple's HLS Tools: https://developer.apple.com/streaming/ which is able to fragment in roughly 1 minute. How to reproduce: {{{ % ffmpeg -i "$FILE.mp4" -codec copy -hls_time 0.975238095238095 -hls_segment_type fmp4 -hls_flags single_file+append_list+split_by_time -hls_playlist_type vod "$FILE.m3u8" ffmpeg version ffmpeg version git-2018-06-23-b86c575 Copyright (c) 2000-2018 the FFmpeg developers built with Apple LLVM version 9.1.0 (clang-902.0.39.2) configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-b86c575 --enable- shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable- librubberband --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-nonfree libavutil 56. 18.102 / 56. 18.102 libavcodec 58. 20.103 / 58. 20.103 libavformat 58. 17.101 / 58. 17.101 libavdevice 58. 4.101 / 58. 4.101 libavfilter 7. 25.100 / 7. 25.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 2.100 / 5. 2.100 libswresample 3. 2.100 / 3. 2.100 libpostproc 55. 2.100 / 55. 2.100 Hyper fast Audio and Video encoder usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}... }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/7281> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#7150(undetermined:new): MXF: audio length mismatch
by FFmpeg 02 Dec '18

02 Dec '18

#7150: MXF: audio length mismatch -------------------------------------+------------------------------------- Reporter: 2mmi | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- '''Summary of the bug:''' Some MP4 source-files will make an MXF file with uneven audio packets. Only the video stream and the first audio track will have the correct lenght. Maybe a premature flush ? Here is an output from "mxfsplit -w testout.MXF": Closing _0001_00000000, size 0x461f8 Closing _0001_15010500.mpg, size 0x196a163 Closing _0001_16040300.wav, size 0xb6ee2c Closing _0001_16040301.wav, size 0xb6df2c Closing _0001_16040302.wav, size 0xb6df2c Closing _0001_16040303.wav, size 0xb6df2c '''How to reproduce:''' ffmpeg -i failinput.mp4 -filter_complex channelsplit=channel_layout=quad[1][2][3][4] -map 0:v -map [1] -map [2] -map [3] -map [4] ^ testout.mxf '''ffmpeg version''': ffmpeg version N-90762-g223f3dff8c '''FFmpeg console output with max debug info:''' - Here you can see there is only 2 packets in the last MXF element (3121). There should be 1 video + 4 audio. [mxf @ 000001dc8a9f16c0] out st:0 dts:3120 [out_0_0 @ 000001dc8e405200] EOF on sink link out_0_0:default. [out_0_2 @ 000001dc8aa5b200] EOF on sink link out_0_2:default. [out_0_4 @ 000001dc8ba9df00] EOF on sink link out_0_4:default. [out_0_3 @ 000001dc8d1fea00] EOF on sink link out_0_3:default. [out_0_1 @ 000001dc8b40eb00] EOF on sink link out_0_1:default. No more output streams to write to, finishing. [mxf @ 000001dc8a9f16c0] out st:1 dts:3120 [mxf @ 000001dc8a9f16c0] out st:2 dts:3120 [mxf @ 000001dc8a9f16c0] out st:3 dts:3120 [mxf @ 000001dc8a9f16c0] out st:4 dts:3120 '''[mxf @ 000001dc8a9f16c0] out st:0 dts:3121 [mxf @ 000001dc8a9f16c0] out st:1 dts:3121''' [mxf @ 000001dc8a9f16c0] essence container count:2 [mxf @ 000001dc8a9f16c0] edit units count 59 [mxf @ 000001dc8a9f16c0] essence container count:2 Last message repeated 1 times [mxf @ 000001dc8a9f16c0] package type:1 [mxf @ 000001dc8a9f16c0] package type:2 frame= 3122 fps=215 q=31.0 Lsize= 78495kB time=00:02:04.88 bitrate=5149.0kbits/s speed=8.59x video:26024kB audio:46832kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 7.738997% '''Complete console output:''' Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'failinput.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41 creation_time : 2018-04-12T13:43:17.000000Z Duration: 00:02:04.93, start: 0.000000, bitrate: 11506 kb/s Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 11180 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default) Metadata: creation_time : 2018-04-12T13:43:17.000000Z handler_name : Alias Data Handler encoder : AVC Coding Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default) Metadata: creation_time : 2018-04-12T13:43:17.000000Z handler_name : Alias Data Handler File 'testout.mxf' already exists. Overwrite ? [y/N] y Stream mapping: Stream #0:1 (aac) -> channelsplit (graph 0) Stream #0:0 -> #0:0 (h264 (native) -> mpeg2video (native)) channelsplit:FL (graph 0) -> Stream #0:1 (pcm_s16le) channelsplit:FR (graph 0) -> Stream #0:2 (pcm_s16le) channelsplit:BL (graph 0) -> Stream #0:3 (pcm_s16le) channelsplit:BR (graph 0) -> Stream #0:4 (pcm_s16le) Press [q] to stop, [?] for help Output #0, mxf, to 'testout.mxf': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: mp42mp41 encoder : Lavf58.13.100 Stream #0:0(eng): Video: mpeg2video (Main), yuv420p, 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: creation_time : 2018-04-12T13:43:17.000000Z handler_name : Alias Data Handler encoder : Lavc58.19.100 mpeg2video Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1 Stream #0:1: Audio: pcm_s16le, 48000 Hz, 1 channels (FL), s16, 768 kb/s (default) Metadata: encoder : Lavc58.19.100 pcm_s16le Stream #0:2: Audio: pcm_s16le, 48000 Hz, 1 channels (FR), s16, 768 kb/s (default) Metadata: encoder : Lavc58.19.100 pcm_s16le Stream #0:3: Audio: pcm_s16le, 48000 Hz, 1 channels (BL), s16, 768 kb/s (default) Metadata: encoder : Lavc58.19.100 pcm_s16le Stream #0:4: Audio: pcm_s16le, 48000 Hz, 1 channels (BR), s16, 768 kb/s (default) Metadata: encoder : Lavc58.19.100 pcm_s16le frame= 3122 fps=341 q=31.0 Lsize= 78495kB time=00:02:04.88 bitrate=5149.0kbits/s speed=13.6x video:26024kB audio:46832kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 7.738997% -- Ticket URL: <https://trac.ffmpeg.org/ticket/7150> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6784(avcodec:new): Encoder for pcm_dvd is missing
by FFmpeg 01 Dec '18

01 Dec '18

#6784: Encoder for pcm_dvd is missing ---------------------------------------+--------------------------------- Reporter: cehoyos | Owner: Type: enhancement | Status: new Priority: wish | Component: avcodec Version: git-master | Keywords: pcm_dvd Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 ---------------------------------------+--------------------------------- {{{ $ ffmpeg -i fate-suite/pcm-dvd/coolitnow-partial.vob -acodec pcm_dvd out.vob ffmpeg version N-88204-g7f9de7b Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.3.0 (GCC) configuration: --enable-gpl --cc=/usr/local/gcc-6.3.0/bin/gcc libavutil 56. 0.100 / 56. 0.100 libavcodec 58. 0.101 / 58. 0.101 libavformat 58. 0.101 / 58. 0.101 libavdevice 58. 0.100 / 58. 0.100 libavfilter 7. 0.100 / 7. 0.100 libswscale 5. 0.100 / 5. 0.100 libswresample 3. 0.100 / 3. 0.100 libpostproc 55. 0.100 / 55. 0.100 [mpeg2video @ 0x3567c60] Invalid frame dimensions 0x0. Last message repeated 8 times Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, mpeg, from 'fate-suite/pcm-dvd/coolitnow-partial.vob': Duration: 00:00:00.94, start: 138.868633, bitrate: 8945 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, smpte170m, top first), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Stream #0:2[0x1bf]: Data: dvd_nav_packet Unknown encoder 'pcm_dvd' }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/6784> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6783(avformat:new): Remuxing pcm_dvd does not work
by FFmpeg 01 Dec '18

01 Dec '18

#6783: Remuxing pcm_dvd does not work -------------------------------------+------------------------------------- Reporter: cehoyos | Owner: Type: | Status: new enhancement | Component: avformat Priority: wish | Keywords: mpegps Version: git- | pcm_dvd master | Blocking: Blocked By: | Analyzed by developer: 0 Reproduced by developer: 0 | -------------------------------------+------------------------------------- {{{ $ ffmpeg -i fate-suite/pcm-dvd/coolitnow-partial.vob -vcodec copy -acodec copy out.vob ffmpeg version N-88204-g7f9de7b Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.3.0 (GCC) configuration: --enable-gpl libavutil 56. 0.100 / 56. 0.100 libavcodec 58. 0.101 / 58. 0.101 libavformat 58. 0.101 / 58. 0.101 libavdevice 58. 0.100 / 58. 0.100 libavfilter 7. 0.100 / 7. 0.100 libswscale 5. 0.100 / 5. 0.100 libswresample 3. 0.100 / 3. 0.100 libpostproc 55. 0.100 / 55. 0.100 [mpeg2video @ 0x3240c80] Invalid frame dimensions 0x0. Last message repeated 8 times Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, mpeg, from 'fate-suite/pcm-dvd/coolitnow-partial.vob': Duration: 00:00:00.94, start: 138.868633, bitrate: 8945 kb/s Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, smpte170m, top first), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Stream #0:1[0xa0]: Audio: pcm_dvd, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Stream #0:2[0x1bf]: Data: dvd_nav_packet [svcd @ 0x32afa60] VBV buffer size not set, using default size of 130KB If you want the mpeg file to be compliant to some specification Like DVD, VCD or others, make sure you set the correct buffer size Output #0, svcd, to 'out.vob': Metadata: encoder : Lavf58.0.101 Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, smpte170m, top first), 720x480 [SAR 8:9 DAR 4:3], q=2-31, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc Stream #0:1: Audio: pcm_dvd, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help [svcd @ 0x32afa60] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly frame= 17 fps=0.0 q=-1.0 Lsize= 766kB time=00:00:01.07 bitrate=5858.1kbits/s speed= 361x video:511kB audio:241kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.905638% }}} {{{ $ ffmpeg -i out.vob ffmpeg version N-88204-g7f9de7b Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.3.0 (GCC) configuration: --enable-gpl libavutil 56. 0.100 / 56. 0.100 libavcodec 58. 0.101 / 58. 0.101 libavformat 58. 0.101 / 58. 0.101 libavdevice 58. 0.100 / 58. 0.100 libavfilter 7. 0.100 / 7. 0.100 libswscale 5. 0.100 / 5. 0.100 libswresample 3. 0.100 / 3. 0.100 libpostproc 55. 0.100 / 55. 0.100 [mp2 @ 0x22f5aa0] Header missing Last message repeated 142 times [mpeg @ 0x22f4240] decoding for stream 0 failed [mpeg @ 0x22f4240] Could not find codec parameters for stream 0 (Audio: mp2, 0 channels, s16p): unspecified frame size Consider increasing the value for the 'analyzeduration' and 'probesize' options Input #0, mpeg, from 'out.vob': Duration: 00:00:01.10, start: 0.500000, bitrate: 5681 kb/s Stream #0:0[0x1c0]: Audio: mp2, 0 channels, s16p Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, smpte170m, top first), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc At least one output file must be specified }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/6783> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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