decode mpeg1 in html5 client

[totaam]

Issue migrated from trac ticket # 1816

component: html5 | priority: major | resolution: fixed

2018-04-21 04:32:26: antoine created the issue

---

We are having problems enabling H264 video decoding (#1463), but maybe we can use mpeg1 instead via jsmpeg.
It's not going to be as efficient as H264, but still better than jpeg for video. And the API is clean and supports streaming via websockets: DECODE IT LIKE IT'S 1999

[totaam]

2018-05-13 07:06:28: antoine uploaded file html5-mpeg1.patch (13.4 KiB)

mpeg1 encoder, decoder and stub html5 implementation

[totaam]

Preparatory work:

• r19296 minor fix for delayed frames (mpeg1 and mpeg2 always buffer one frame?)
• r19297 support mpeg1 and mpeg2 decoding in python client

The patch attached implements encoding but still needs work:

• it breaks muxing (fixable)
• decoding is not actually implemented in the html5 client (couldn't figure out the jsmpeg api)

This may all be moot since H264 decoding seems to be fixed: #1839.
It could still be useful for very low powered device (ie: some arm boards?) where the decoding complexity of H264 is too much?

[totaam]

2018-05-13 18:04:43: antoine uploaded file html5-mpeg1-v2.patch (3.3 KiB)

hook up mpeg1 decoding, not painting yet

[totaam]

2018-05-13 18:07:39: antoine commented

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Updates:

• r19306: test video encoders with two frames (since mpeg1 and mpeg2 delay one frame, they would error only on the second)
• r19312: make muxer optional in ffmpeg encoder
• r19313: implement mpeg1 and mpeg2 encoding, add python avcodec support for decoding mpeg2, and paint colors ("olive" and "lime")

For the html5 client, the patch above seems to decode OK, we just need to do something with the YUV data we get. Either re-use their WebGLRenderer or do software YUV-to-RGB as a POC. (and maybe ship a subset of jsmpeg1 - no need for the player and websocket bits - audio?)

[totaam]

2018-05-14 19:11:40: antoine commented

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html5 mpeg1 decoder added in r19317. (we won't be doing mpeg2: jsmpeg : Support MPEG2?)

Still TODO:

• check CPU load and bandwidth: compare it with h264 (#1839 - once asm.js optimization is fixed there) so we can use weights to choose the most appropriate video encoder
• trim jsmpeg.js file
• re-use the webgl checks to enable the gl renderer in other places?

Note: the "mpeg1" video encoding is controlled by the "Video" option in the advanced connection options. This enables both h264 and mpeg1. To use only mpeg1, set --video-encoders=ffmpeg on the server side.

[totaam]

Updates:

• r19577: epic fail - was causing a massive drop in framerate (affected trunk only - glad I didn't backport this!)
• r19578: disable webgl rendering: I've seen unrecoverable webgl errors, so we can't rely on it
• r19579: this refresh bug caused unnecessary refresh and jerky rendering
• not going to trim the jsmpeg file, which is small enough already and not much to save anyway

Requirements:

• enable "Video" in html5 connection advanced options
• ffmpeg-xpra version 4.0-2 or later
• best to use --video-encoders=ffmpeg to ensure only mpeg1 is used for testing

Initial testing shows that my decent CPU can render 1080p at a decent framerate (close to 25fps), each frame taking about 10 to 50KB - meaning around 2 to 10Mbps, roughly.
Note: mpeg1 always buffers one frame, which is fine for sending video.

@maxmylyn: ready for testing. worth comparing with #1839

[totaam]

It works great - except native decoding seems to be extremely choppy and spews lots of tracebacks on both my Fedora and Windows8.1 boxes.

Is there anything in particular I should be looking at?

[totaam]

It works great - except native decoding seems to be extremely choppy and spews lots of tracebacks on both my Fedora and Windows8.1 boxes.

What tracebacks? Always include all tracebacks.

In any case, mpeg1 is not meant to be used by the python client, it is designed for the html5 client.

[totaam]

2018-06-12 18:35:48: maxmylyn commented

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For reference I'm running Trunk r19621 on Fedora 28 with Chrome in Fedora and Windows8.1.

On the client side I see the following:

Client.js:1 error painting mpeg4+mp4 DOMException: Failed to execute 'appendBuffer' on 'SourceBuffer': This SourceBuffer has been removed from the parent media source.
    at XpraWindow._push_video_buffers (http://192.168.1.81:10000/js/Window.js:1:18041)
    at XpraWindow.do_paint (http://192.168.1.81:10000/js/Window.js:1:25593)
    at XpraWindow.may_paint_now (http://192.168.1.81:10000/js/Window.js:1:20976)
    at XpraWindow.paint (http://192.168.1.81:10000/js/Window.js:1:20603)
    at XpraClient._process_draw_queue (http://192.168.1.81:10000/js/Client.js:2:15980)
    at XpraClient._process_draw (http://192.168.1.81:10000/js/Client.js:2:14532)
    at XpraProtocolWorkerHost.XpraClient._route_packet [as packet_handler] (http://192.168.1.81:10000/js/Client.js:1:9239)
    at Worker.<anonymous> (http://192.168.1.81:10000/js/Protocol.js:1:707)
XpraClient.error @ Client.js:1
XpraWindow.error @ Window.js:1
paint_error @ Window.js:1
XpraWindow.do_paint @ Window.js:1
XpraWindow.may_paint_now @ Window.js:1
XpraWindow.paint @ Window.js:1
XpraClient._process_draw_queue @ Client.js:2
XpraClient._process_draw @ Client.js:2
XpraClient._route_packet @ Client.js:1
(anonymous) @ Protocol.js:1
Window.js:1 Uncaught (in promise) DOMException: The element has no supported sources.

On the server side I see the following

2018-06-12 10:33:35,576 client video source buffer error
2018-06-12 10:33:35,576 client video error
2018-06-12 10:33:35,698 client error painting mpeg4+mp4 InvalidStateError: Failed to execute 'appendBuffer' on 'SourceBuffer': This SourceBuffer has been removed from the parent media source.
2018-06-12 10:33:35,713 Warning: client decoding error:
2018-06-12 10:33:35,715  InvalidStateError: Failed to execute 'appendBuffer' on 'SourceBuffer': This SourceBuffer has been removed from the parent media source.
2018-06-12 10:33:36,345 client error painting mpeg4+mp4 InvalidStateError: Failed to execute 'appendBuffer' on 'SourceBuffer': This SourceBuffer has been removed from the parent media source.
2018-06-12 10:33:36,347 Warning: client decoding error:
2018-06-12 10:33:36,347  InvalidStateError: Failed to execute 'appendBuffer' on 'SourceBuffer': This SourceBuffer has been removed from the parent media source.
2018-06-12 10:33:36,360 client video media source EOS error: NotFoundError: Failed to execute 'removeSourceBuffer' on 'MediaSource': The SourceBuffer provided is not contained in this MediaSource.
2018-06-12 10:33:36,361 client video codec string: video/mp4; codecs="avc1.42C01E" for mpeg4+mp4 profile 'baseline', level '3.0'
2018-06-12 10:33:36,362 client video media source open
2018-06-12 10:33:36,410 client video error

(in hindsight I definitely should have included the tracebacks)

[totaam]

2018-06-12 18:36:25: maxmylyn commented

---

Also this error starts to print after a second or so:

Client.js:1 video error
XpraClient.error @ Client.js:1
XpraWindow.error @ Window.js:1
(anonymous) @ Window.js:1
error (async)
XpraWindow._init_video @ Window.js:1
XpraWindow.do_paint @ Window.js:1
XpraWindow.may_paint_now @ Window.js:1
XpraWindow.paint @ Window.js:1
XpraClient._process_draw_queue @ Client.js:2
XpraClient._process_draw @ Client.js:2
XpraClient._route_packet @ Client.js:1
(anonymous) @ Protocol.js:1
index.html:1 Uncaught (in promise) DOMException: The play() request was interrupted by a call to pause(). https://goo.gl/LdLk22

[totaam]

Those stacktraces have nothing to do with this ticket, they're for native video #1463 - which is known to be broken, and doesn't use mpeg1.

[totaam]

2018-11-01 17:43:42: maxmylyn commented

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Upped my Fedora 28 server to r20907 and am using Chrome 69 (Fedora 28) as a client.

The mpeg-1 decoding is much better now, but I keep getting random hitches where the framerate drops while watching YouTube videos in Chrome and Firefox. I did some investigating and turned on -d ffmpeg, and I see these prints in the logs right around the frame drops:

2018-11-01 10:18:54,391 compress_image(None, -1, -1, {u'flush': True}) avcodec_receive_packet avpacket=0x7f2c327fb110
2018-11-01 10:18:54,391 avcodec_receive_packet(..)=0
2018-11-01 10:18:54,391 avcodec_receive_packet returned 0x63f8 bytes of data, flags: 
2018-11-01 10:18:54,391 compress_image(None, -1, -1, {u'flush': True}) avcodec_receive_packet avpacket=0x7f2c327fb110
2018-11-01 10:18:54,391 avcodec_receive_packet(..)=-541478725
2018-11-01 10:18:54,391 avcodec_receive_packet returned error 'End of file' for flush request
2018-11-01 10:18:54,391 compress_image(None) 25592 bytes (1 buffers) for mpeg1 with client options: {u'frame': 116, u'delayed': 1}
2018-11-01 10:18:54,391 enc_ffmpeg.Encoder({u'video-description': 'MPEG-1 video', u'encoding': u'mpeg1', u'encoder_width': 1160, u'encoder_height': 652, u'height': 652, u'width': 1160, u'version': (58, 18, 100), u'src_format': u'YUV420P', u'formats': [u'YUV420P'], u'frames': 117, u'type': u'ffmpeg', u'video-codec': 'mpeg1video'}).clean_encoder()
2018-11-01 10:18:54,391 clean_encoder() freeing AVFrame: 0x7f2bd3803fc0
2018-11-01 10:18:54,391 clean_encoder() freeing AVCodecContext: 0x7f2bc633a440
2018-11-01 10:18:54,392 clean_encoder() done
2018-11-01 10:18:54,392 enc_ffmpeg.Encoder(*closed*).clean_encoder()
2018-11-01 10:18:54,392 clean_encoder() freeing AVCodecContext: 0x0
2018-11-01 10:18:54,392 clean_encoder() done
2018-11-01 10:18:54,881 init_context codec(mpeg1)=mpeg1
2018-11-01 10:18:54,881 mpeg1video: "MPEG-1 video", codec flags: SLICE_THREADS, DELAY
2018-11-01 10:18:54,882 AVCodecContext options: b, ab, bt, flags, unaligned, mv4, qpel, loop, qscale, pass1, pass2, gray, psnr, truncated, ildct, low_delay, global_header, bitexact, aic, ilme, cgop, output_corrupt, fast, noout, ignorecrop, local_header, chunks, showall, export_mvs, skip_manual, ass_ro_flush_noop, time_base, g, ar, ac, cutoff, frame_size, frame_number, delay, qcomp, qblur, qmin, qmax, qdiff, bf, b_qfactor, b_strategy, ps, mv_bits, header_bits, i_tex_bits, p_tex_bits, i_count, p_count, skip_count, misc_bits, frame_bits, codec_tag, bug, autodetect, xvid_ilace, ump4, no_padding, amv, qpel_chroma, std_qpel, qpel_chroma2, direct_blocksize, edge, hpel_chroma, dc_clip, ms, trunc, iedge, strict, very, strict, normal, unofficial, experimental, b_qoffset, err_detect, crccheck, bitstream, buffer, explode, ignore_err, careful, compliant, aggressive, has_b_frames, block_align, mpeg_quant, rc_override_count, maxrate, minrate, bufsize, i_qfactor, i_qoffset, dct, auto, fastint, int, mmx, altivec, faan, lumi_mask, tcplx_mask, scplx_mask, p_mask, dark_mask, idct, auto, int, simple, simplemmx, arm, altivec, simplearm, simplearmv5te, simplearmv6, simpleneon, xvid, xvidmmx, faani, simpleauto, slice_count, ec, guess_mvs, deblock, favor_inter, bits_per_coded_sample, pred, left, plane, median, aspect, sar, debug, pict, rc, bitstream, mb_type, qp, dct_coeff, green_metadata, skip, startcode, er, mmco, bugs, buffers, thread_ops, nomc, cmp, subcmp, mbcmp, ildctcmp, dia_size, last_pred, preme, precmp, sad, sse, satd, dct, psnr, bit, rd, zero, vsad, vsse, nsse, dctmax, chroma, msad, pre_dia_size, subq, me_range, global_quality, coder, vlc, ac, raw, rle, context, slice_flags, mbd, simple, bits, rd, sc_threshold, nr, rc_init_occupancy, flags2, threads, auto, dc, nssew, skip_top, skip_bottom, profile, unknown, aac_main, aac_low, aac_ssr, aac_ltp, aac_he, aac_he_v2, aac_ld, aac_eld, mpeg2_aac_low, mpeg2_aac_he, dts, dts_es, dts_96_24, dts_hd_hra, dts_hd_ma, mpeg4_sp, mpeg4_core, mpeg4_main, mpeg4_asp, main10, msbc, level, unknown, lowres, skip_threshold, skip_factor, skip_exp, skipcmp, mblmin, mblmax, mepc, skip_loop_filter, skip_idct, skip_frame, none, default, noref, bidir, nokey, nointra, all, bidir_refine, brd_scale, keyint_min, refs, chromaoffset, trellis, mv0_threshold, b_sensitivity, compression_level, min_prediction_order, max_prediction_order, timecode_frame_start, bits_per_raw_sample, channel_layout, request_channel_layout, rc_max_vbv_use, rc_min_vbv_use, ticks_per_frame, color_primaries, bt709, unknown, bt470m, bt470bg, smpte170m, smpte240m, film, bt2020, smpte428, smpte428_1, smpte431, smpte432, jedec-p22, unspecified, color_trc, bt709, unknown, gamma22, gamma28, smpte170m, smpte240m, linear, log100, log316, iec61966-2-4, bt1361e, iec61966-2-1, bt2020-10, bt2020-12, smpte2084, smpte428, arib-std-b67, unspecified, log, log_sqrt, iec61966_2_4, bt1361, iec61966_2_1, bt2020_10bit, bt2020_12bit, smpte428_1, colorspace, rgb, bt709, unknown, fcc, bt470bg, smpte170m, smpte240m, ycgco, bt2020nc, bt2020c, smpte2085, unspecified, ycocg, bt2020_ncl, bt2020_cl, color_range, unknown, tv, pc, unspecified, mpeg, jpeg, chroma_sample_location, unknown, left, center, topleft, top, bottomleft, bottom, unspecified, log_level_offset, slices, thread_type, slice, frame, audio_service_type, ma, ef, vi, hi, di, co, em, vo, ka, request_sample_fmt, pkt_timebase, sub_charenc, sub_charenc_mode, do_nothing, auto, pre_decoder, ignore, sub_text_format, ass, ass_with_timings, refcounted_frames, side_data_only_packets, apply_cropping, skip_alpha, field_order, progressive, tt, bb, tb, bt, dump_separator, codec_whitelist, pixel_format, video_size, max_pixels, hwaccel_flags, ignore_level, allow_high_depth, allow_profile_mismatch, extra_hw_frames
2018-11-01 10:18:54,882 mpeg1video encoder options: gop_timecode, intra_vlc, drop_frame_timecode, scan_offset, timecode_frame_start, sad, sse, satd, dct, psnr, bit, rd, zero, vsad, vsse, nsse, dct264, dctmax, chroma, msad, mpv_flags, skip_rd, strict_gop, qp_rd, cbp_rd, naq, mv0, luma_elim_threshold, chroma_elim_threshold, quantizer_noise_shaping, error_rate, qsquish, rc_qmod_amp, rc_qmod_freq, rc_eq, rc_init_cplx, rc_buf_aggressivity, border_mask, lmin, lmax, ibias, pbias, rc_strategy, ffmpeg, xvid, motion_est, zero, epzs, xone, force_duplicated_matrix, b_strategy, b_sensitivity, brd_scale, skip_threshold, skip_factor, skip_exp, skip_cmp, sc_threshold, noise_reduction, mpeg_quant, ps, mepc, mepre
2018-11-01 10:18:54,882 init_encoder() thread-type=2, thread-count=0
2018-11-01 10:18:54,882 init_encoder() codec flags: 
2018-11-01 10:18:54,882 init_encoder() codec flags2: 
2018-11-01 10:18:54,883 avcodec_open2 success
2018-11-01 10:18:54,883 enc_ffmpeg.Encoder.init_context(1160, 652, YUV420P) self={u'video-description': 'MPEG-1 video', u'encoding': u'mpeg1', u'encoder_width': 1160, u'encoder_height': 652, u'height': 652, u'width': 1160, u'version': (58, 18, 100), u'src_format': u'YUV420P', u'formats': [u'YUV420P'], u'frames': 0, u'type': u'ffmpeg', u'video-codec': 'mpeg1video'}
2018-11-01 10:18:54,884 compress_image(libyuv.YUVImageWrapper(YUV420P:(0, 0, 1160, 652, 24):3_PLANES), 65, 48, {'av-sync': True, 'bandwidth-limit': 5086038, 'content-type': 'browser', 'scroll': True}) avcodec_send_frame frame=0x7f2bca5a2280

It looks like the encoder is being restarted while the video is playing, which is causing the frame drops and choppiness.

[totaam]

The compress_image(None, -1, -1, {u'flush': True}) means that we call flush() on the encoder. That can be called from:

• full-refresh timer (-d refresh)
• refresh_subregion (-d refresh)
• the video_encoder_flush_timer (-d regionrefresh)

Unfortunately, these codepaths don't have a lot of debug logging at the moment, so it may not be possible to figure out which one of those methods fired.

-d video would also tell us more than -d ffmpeg which is too low-level.

[totaam]

2018-11-01 19:03:29: maxmylyn commented

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Restarted my server except this time with -d refresh.

Same setup - Watching YouTube videos in Chrome (with Chrome as the client). Watching the logs, I see lots of the auto refresh with smooth content, but I saw these logs during a series of framedrops. I'd like to retry with -d refresh,ffmpeg but I'm pretty sure that'll be way too many logs.

2018-11-01 11:58:32,125 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), keeping existing timer (all pixels outside area) (region=rectangle(157, 192, 1160, 652), refresh regions=[R(1318, 192, 462, 653), R(157, 0, 1623, 192)])
2018-11-01 11:58:32,156 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), keeping existing timer (all pixels outside area) (region=rectangle(157, 192, 1160, 652), refresh regions=[R(1318, 192, 462, 653), R(157, 0, 1623, 192)])
2018-11-01 11:58:32,205 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), keeping existing timer (all pixels outside area) (region=rectangle(157, 192, 1160, 652), refresh regions=[R(1318, 192, 462, 653), R(157, 0, 1623, 192)])
2018-11-01 11:58:32,263 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), keeping existing timer (all pixels outside area) (region=rectangle(157, 192, 1160, 652), refresh regions=[R(1318, 192, 462, 653), R(157, 0, 1623, 192)])
2018-11-01 11:58:32,350 timer_full_refresh() after 999ms, auto_refresh_encodings=('png', 'webp', 'rgb32'), options={'speed': 50, 'quality': 100, 'optimize': False, 'auto_refresh': True}, regions=[R(1318, 192, 462, 653), R(157, 0, 1623, 192)], refresh_exclude=rectangle(157, 192, 1161, 653)
2018-11-01 11:58:32,356 get_refresh_encoding(462, 653, 50, 100, png)=webp
2018-11-01 11:58:32,356 get_refresh_encoding(1623, 192, 50, 100, png)=webp
2018-11-01 11:58:32,357 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:32,373 auto refresh:  webp screen update (actual quality=100, lossy=False), nothing to do (region=rectangle(157, 0, 1623, 192), refresh regions=[])
2018-11-01 11:58:32,390 auto refresh:  webp screen update (actual quality=100, lossy=False), nothing to do (region=rectangle(1318, 192, 462, 653), refresh regions=[])
2018-11-01 11:58:32,397 auto refresh:  jpeg screen update (actual quality=  5, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1161, 653), refresh regions=[])
2018-11-01 11:58:32,463 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:32,616 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:32,619 auto refresh:  jpeg screen update (actual quality= 90, lossy= True), added pixels to refresh regions, scheduling refresh in 500ms (pct=7, batch=37) (region=rectangle(1318, 192, 208, 653), refresh regions=[R(1318, 192, 208, 653)])
2018-11-01 11:58:32,621 auto refresh:  jpeg screen update (actual quality= 90, lossy= True), added pixels to refresh regions, re-scheduling refresh (due in 500ms, 2ms added - sched_delay=500, pct=21, batch=37) (region=rectangle(157, 0, 1369, 192), refresh regions=[R(1318, 192, 208, 653), R(157, 0, 1369, 192)])
2018-11-01 11:58:32,699 video region unchanged: rectangle(157, 192, 1161, 653) - no change in refresh
2018-11-01 11:58:32,699 update_refresh_attributes() wid=3, sizef=1.37, content-type=browser, qf=1.12, sf=1.03, cf=1.00, batch delay=53, bandwidth-limit=5142681, min-delay=500, max-delay=1000, delay=500
2018-11-01 11:58:32,699 do_set_auto_refresh_delay(500, 500)
2018-11-01 11:58:32,699 update_refresh_attributes() wid=3, refresh quality=100%, refresh speed=50%, for cv=0.00, bwl=5142681
2018-11-01 11:58:32,995 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), keeping existing timer (all pixels outside area) (region=rectangle(157, 192, 1160, 652), refresh regions=[R(1318, 192, 208, 653), R(157, 0, 1369, 192)])
2018-11-01 11:58:33,120 timer_full_refresh() after 500ms, auto_refresh_encodings=('png', 'webp', 'rgb32'), options={'speed': 50, 'quality': 100, 'optimize': False, 'auto_refresh': True}, regions=[R(1318, 192, 208, 653), R(157, 0, 1369, 192)], refresh_exclude=rectangle(157, 192, 1161, 653)
2018-11-01 11:58:33,120 get_refresh_encoding(208, 653, 50, 100, png)=webp
2018-11-01 11:58:33,120 get_refresh_encoding(1369, 192, 50, 100, png)=webp
2018-11-01 11:58:33,130 auto refresh:  webp screen update (actual quality=100, lossy=False), nothing to do (region=rectangle(157, 0, 1369, 192), refresh regions=[])
2018-11-01 11:58:33,140 auto refresh:  webp screen update (actual quality=100, lossy=False), nothing to do (region=rectangle(1318, 192, 208, 653), refresh regions=[])
2018-11-01 11:58:33,428 auto refresh:  jpeg screen update (actual quality=  5, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1161, 653), refresh regions=[])
2018-11-01 11:58:33,487 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:33,554 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:33,620 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:33,699 video region unchanged: rectangle(157, 192, 1161, 653) - no change in refresh
2018-11-01 11:58:33,700 update_refresh_attributes() wid=3, sizef=1.37, content-type=browser, qf=1.11, sf=1.07, cf=1.00, batch delay=49, bandwidth-limit=4927046, min-delay=500, max-delay=1000, delay=500
2018-11-01 11:58:33,700 do_set_auto_refresh_delay(500, 500)
2018-11-01 11:58:33,700 update_refresh_attributes() wid=3, refresh quality=100%, refresh speed=50%, for cv=0.00, bwl=4927046
2018-11-01 11:58:33,739 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:33,785 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])
2018-11-01 11:58:33,797 auto refresh: mpeg1 screen update (actual quality=  0, lossy= True), added pixels to refresh regions (region=rectangle(157, 192, 1160, 652), refresh regions=[])

I think it may be the full-refresh that's causing the encoder to get flushed fully. But you probably know more about that than I do.

[totaam]

This may have been caused by r13773 which flushes the video encoders during the timer refresh (this was added for handling b-frames - but maybe this was not the right thing to do).

Please try r20914.

If the problem still occurs, please post -d refresh again, and also -d refresh,video.

[totaam]

2018-11-06 17:46:32: maxmylyn commented

---

Upped my server to r20967 - it's much better now. I can't find any other issues, so I'm going to (finally) go ahead and close this.