[FFmpeg-user] Encoding to mpeg2video results in buffer underflows

Sun Dec 30 15:01:04 CET 2012

On Sat, Dec 29, 2012 at 12:06 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Frank Häfemeier <ffmpeg <at> frank.haefemeier.eu> writes:
>
>> Am Sonntag, den 09.12.2012, 03:07 +0100 schrieb Frank Häfemeier:
>> > Hi Carl,
>> > [...]
>> > I upoload a sample video file and console output to the FTP server with
>> > the name 'h264_mpeg2video_rc_buffer_underflow.ts' and
>> > 'h264_mpeg2video_rc_buffer_underflow.txt'.
>> >
>> > Don't hesitate to ask if you need further help.
>>
>> Does a ticket exists so I can track it or is it fixed maybe?
>
> Sorry for forgetting about this problem!
>
> I just tested with the sample (and command line) you uploaded,
> the problem does not appear to be reproducible anymore.
>
On Sun, Dec 30, 2012 at 1:57 AM, Jonathan Isom <jeisom at gmail.com> wrote:
 Hi

 Just tested and it appears to still be there with the latest git.
 Posted to upload.ffmpeg.org/incoming "mpeg2video_underrun.txt" &
 "mpeg2video_underrun.mp4". All four command lines produce underrun
 errors.

 Later

Jonathan

 > Carl Eugen
>
> $ ffmpeg -i h264_mpeg2video_rc_buffer_underflow.ts -target pal-dvd -f mpeg2video
> out.m2v
> ffmpeg version N-48278-g925c9f4 Copyright (c) 2000-2012 the FFmpeg developers
>   built on Dec 29 2012 19:04:51 with gcc 4.7 (SUSE Linux)
>   configuration: --enable-gpl
>   libavutil      52. 12.100 / 52. 12.100
>   libavcodec     54. 81.100 / 54. 81.100
>   libavformat    54. 50.104 / 54. 50.104
>   libavdevice    54.  3.102 / 54.  3.102
>   libavfilter     3. 30.101 /  3. 30.101
>   libswscale      2.  1.103 /  2.  1.103
>   libswresample   0. 17.102 /  0. 17.102
>   libpostproc    52.  2.100 / 52.  2.100
> [h264 @ 0x1cce9e0] mmco: unref short failure
>     Last message repeated 2 times
> [mpegts @ 0x1cca7c0] max_analyze_duration 5000000 reached at 5000000
> Input #0, mpegts, from 'h264_mpeg2video_rc_buffer_underflow.ts':
>   Duration: 00:00:20.14, start: 1.400000, bitrate: 6964 kb/s
>   Program 1
>     Metadata:
>       service_name    : Service01
>       service_provider: FFmpeg
>     Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p,
> 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
> Output #0, mpeg2video, to 'out.m2v':
>   Metadata:
>     encoder         : Lavf54.50.104
>     Stream #0:0: Video: mpeg2video, yuv420p, 720x576 [SAR 64:45 DAR 16:9],
> q=2-31, 6000 kb/s, 90k tbn, 25 tbc
> Stream mapping:
>   Stream #0:0 -> #0:0 (h264 -> mpeg2video)
> Press [q] to stop, [?] for help
> [h264 @ 0x1ea3260] mmco: unref short failure
>     Last message repeated 1 times
> [h264 @ 0x2041a00] mmco: unref short failure
> frame=  505 fps=214 q=2.0 Lsize=   11024kB time=00:00:20.16
> bitrate=4479.4kbits/s dup=3 drop=493
> video:11024kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.000000%
>
> $ ffmpeg -i h264_mpeg2video_rc_buffer_underflow.ts -target pal-dvd out.vob
> ffmpeg version N-48278-g925c9f4 Copyright (c) 2000-2012 the FFmpeg developers
>   built on Dec 29 2012 19:04:51 with gcc 4.7 (SUSE Linux)
>   configuration: --enable-gpl
>   libavutil      52. 12.100 / 52. 12.100
>   libavcodec     54. 81.100 / 54. 81.100
>   libavformat    54. 50.104 / 54. 50.104
>   libavdevice    54.  3.102 / 54.  3.102
>   libavfilter     3. 30.101 /  3. 30.101
>   libswscale      2.  1.103 /  2.  1.103
>   libswresample   0. 17.102 /  0. 17.102
>   libpostproc    52.  2.100 / 52.  2.100
> [h264 @ 0x27c79a0] mmco: unref short failure
>     Last message repeated 2 times
> [mpegts @ 0x27c3780] max_analyze_duration 5000000 reached at 5000000
> Input #0, mpegts, from 'h264_mpeg2video_rc_buffer_underflow.ts':
>   Duration: 00:00:20.14, start: 1.400000, bitrate: 6964 kb/s
>   Program 1
>     Metadata:
>       service_name    : Service01
>       service_provider: FFmpeg
>     Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p,
> 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
> Output #0, dvd, to 'out.vob':
>   Metadata:
>     encoder         : Lavf54.50.104
>     Stream #0:0: Video: mpeg2video, yuv420p, 720x576 [SAR 64:45 DAR 16:9],
> q=2-31, 6000 kb/s, 90k tbn, 25 tbc
> Stream mapping:
>   Stream #0:0 -> #0:0 (h264 -> mpeg2video)
> Press [q] to stop, [?] for help
> [h264 @ 0x299c220] mmco: unref short failure
>     Last message repeated 1 times
> [h264 @ 0x2b3a9c0] mmco: unref short failure
> frame=  505 fps=211 q=2.0 Lsize=   11262kB time=00:00:20.16
> bitrate=4576.3kbits/s dup=3 drop=493
> video:11024kB audio:0kB subtitle:0 global headers:0kB muxing overhead 2.163261%
>
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