When we are debugging issues (notably during unattended
installs), having to look individual screenshots is less
than optimal. So introduce in virt tests the ability to
get a webm file that can be played quite nicely and out
of the box in recent versions of firefox and chromium.
In order to do that, move to a sequential screenshot
naming policy for each vm, and encode videos at vm
postprocessing stage.
In order to use that feature, the host needs to have a
ffmpeg build sufficiently recent that can encode webm
files. The infrastructure will do the best possible to
find it out on your path.
Feature successfuly tested under Fedora 16.
Changes from v1:
* Fixed some last minute changes on parameter name
* Turns on the service by default
* Downgrade failure messages to info level
Signed-off-by: Lucas Meneghel Rodrigues <lmr@xxxxxxxxxx>
---
client/tests/kvm/base.cfg.sample | 6 ++++
client/virt/virt_env_process.py | 49 ++++++++++++++++++++++++++++++++++----
2 files changed, 50 insertions(+), 5 deletions(-)
diff --git a/client/tests/kvm/base.cfg.sample b/client/tests/kvm/base.cfg.sample
index 6b3f9fd..1bda496 100644
--- a/client/tests/kvm/base.cfg.sample
+++ b/client/tests/kvm/base.cfg.sample
@@ -86,6 +86,12 @@ screendump_quality = 30
screendump_temp_dir = /dev/shm
screendump_verbose = no
+# Encode video from vm screenshots (requires ffmpeg build that can encode webm)
+encode_video_files = yes
+encode_video_framerate = 1
+keep_video_files = yes
+keep_video_files_on_error = yes
+
# Default remote shell port (SSH under linux)
shell_port = 22
diff --git a/client/virt/virt_env_process.py b/client/virt/virt_env_process.py
index e5316d2..27a60d3 100644
--- a/client/virt/virt_env_process.py
+++ b/client/virt/virt_env_process.py
@@ -16,6 +16,16 @@ _screendump_thread = None
_screendump_thread_termination_event = None
+def ffmpeg_path():
+ try:
+ return virt_utils.find_command("ffmpeg")
+ except ValueError:
+ return None
+
+
+_ffmpeg = ffmpeg_path()
+
+
def preprocess_image(test, params):
"""
Preprocess a single QEMU image according to the instructions in params.
@@ -156,6 +166,25 @@ def postprocess_vm(test, params, env, name):
except kvm_monitor.MonitorError, e:
logging.warn(e)
+ # Encode a webm video from the screenshots produced?
+ if params.get("encode_video_files", "yes") == "yes":
+ video_framerate = int(params.get("encode_video_framerate", 1))
+ if _ffmpeg is not None:
+ logging.debug("Param 'encode_video_files' specified, trying to "
+ "encode a video from the screenshots produced by "
+ "vm %s", vm.name)
+ os.chdir(test.debugdir)
+ try:
+ utils.run("%s -r %d -b 1800 -i screendumps_%s/%s %s.webm" %
+ (_ffmpeg, video_framerate, vm.name, "%04d.jpg",
+ vm.name))
+ except error.CmdError, e:
+ logging.info("Failed to encode video for vm %s: %s",
+ vm.name, e)
+ else:
+ logging.info("Param 'encode_video' specified, but ffmpeg not "
+ "present, not encoding video for vm %s", vm.name)
+
if params.get("kill_vm") == "yes":
kill_vm_timeout = float(params.get("kill_vm_timeout", 0))
if kill_vm_timeout:
@@ -364,20 +393,27 @@ def postprocess(test, params, env):
pass
# Should we keep the PPM files?
- if params.get("keep_ppm_files") != "yes":
+ if params.get("keep_ppm_files", "no") != "yes":
logging.debug("Param 'keep_ppm_files' not specified, removing all PPM "
"files from debug dir")
for f in glob.glob(os.path.join(test.debugdir, '*.ppm')):
os.unlink(f)
# Should we keep the screendump dirs?
- if params.get("keep_screendumps") != "yes":
+ if params.get("keep_screendumps", "no") != "yes":
logging.debug("Param 'keep_screendumps' not specified, removing "
"screendump dirs")
for d in glob.glob(os.path.join(test.debugdir, "screendumps_*")):
if os.path.isdir(d) and not os.path.islink(d):
shutil.rmtree(d, ignore_errors=True)
+ # Should we keep the video files?
+ if params.get("keep_video_files", "yes") != "yes":
+ logging.debug("Param 'keep_videos' not specified, removing all webm "
+ "files from debug dir")
+ for f in glob.glob(os.path.join(test.debugdir, '*.webm')):
+ os.unlink(f)
+
# Kill all unresponsive VMs
if params.get("kill_unresponsive_vms") == "yes":
logging.debug("Param 'kill_unresponsive_vms' specified, killing all "
@@ -457,9 +493,12 @@ def _take_screendumps(test, params, env):
quality = int(params.get("screendump_quality", 30))
cache = {}
+ counter = {}
while True:
for vm in env.get_all_vms():
+ if vm not in counter.keys():
+ counter[vm] = 0
if not vm.is_alive():
continue
try:
@@ -482,9 +521,9 @@ def _take_screendumps(test, params, env):
os.makedirs(screendump_dir)
except OSError:
pass
- screendump_filename = os.path.join(screendump_dir,
- "%s_%s.jpg" % (vm.name,
- time.strftime("%Y-%m-%d_%H-%M-%S")))
+ counter[vm] += 1
+ screendump_filename = os.path.join(screendump_dir, "%04d.jpg" %
+ counter[vm])
hash = utils.hash_file(temp_filename)
if hash in cache:
try:
--
1.7.7
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
